./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe031_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe031_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/safe031_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe031_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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 20:48:33,815 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:48:33,865 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:48:33,869 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:48:33,869 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:48:33,887 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:48:33,888 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:48:33,888 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:48:33,889 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:48:33,889 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:48:33,889 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:48:33,890 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:48:33,890 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:48:33,891 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:48:33,891 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:48:33,891 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:48:33,892 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:48:33,892 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:48:33,893 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:48:33,893 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:48:33,893 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:48:33,894 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:48:33,894 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:48:33,895 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:48:33,895 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:48:33,895 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:48:33,896 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:48:33,896 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:48:33,896 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:48:33,897 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:48:33,897 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:48:33,897 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:48:33,898 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:48:33,898 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:48:33,898 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:48:33,899 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:48:33,899 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:48:33,899 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:48:33,900 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:48:33,900 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:48:33,900 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:48:33,901 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:48:33,901 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:48:33,902 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:48:34,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:48:34,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:48:34,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:48:34,197 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:48:34,198 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:48:34,199 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe031_tso.yml/witness.yml [2024-06-03 20:48:34,367 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:48:34,367 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:48:34,369 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe031_tso.i [2024-06-03 20:48:35,506 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:48:35,751 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:48:35,752 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe031_tso.i [2024-06-03 20:48:35,769 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1ba40bb3/b97d7bb11d48434cac8c4ea651240e78/FLAG22f27daae [2024-06-03 20:48:35,788 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1ba40bb3/b97d7bb11d48434cac8c4ea651240e78 [2024-06-03 20:48:35,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:48:35,790 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:48:35,792 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:48:35,792 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:48:35,797 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:48:35,797 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:48:34" (1/2) ... [2024-06-03 20:48:35,799 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c478751 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:48:35, skipping insertion in model container [2024-06-03 20:48:35,799 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:48:34" (1/2) ... [2024-06-03 20:48:35,801 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3b6b781 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:48:35, skipping insertion in model container [2024-06-03 20:48:35,801 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:48:35" (2/2) ... [2024-06-03 20:48:35,801 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c478751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:35, skipping insertion in model container [2024-06-03 20:48:35,802 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:48:35" (2/2) ... [2024-06-03 20:48:35,802 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:48:35,850 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:48:35,851 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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 )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && x <= 1) && z <= 2) && z <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) [2024-06-03 20:48:35,851 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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 )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && x <= 1) && z <= 2) && z <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) [2024-06-03 20:48:35,851 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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 )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && x <= 1) && z <= 2) && z <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) [2024-06-03 20:48:35,851 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:48:35,852 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-03 20:48:35,914 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:48:36,273 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:48:36,280 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:48:36,421 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:48:36,457 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:48:36,458 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:36 WrapperNode [2024-06-03 20:48:36,458 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:48:36,459 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:48:36,459 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:48:36,459 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:48:36,466 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:36" (1/1) ... [2024-06-03 20:48:36,479 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:36" (1/1) ... [2024-06-03 20:48:36,507 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-03 20:48:36,508 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:48:36,509 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:48:36,509 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:48:36,509 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:48:36,519 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:36" (1/1) ... [2024-06-03 20:48:36,519 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:36" (1/1) ... [2024-06-03 20:48:36,522 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:36" (1/1) ... [2024-06-03 20:48:36,535 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 20:48:36,536 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:36" (1/1) ... [2024-06-03 20:48:36,536 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:36" (1/1) ... [2024-06-03 20:48:36,547 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:36" (1/1) ... [2024-06-03 20:48:36,552 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:36" (1/1) ... [2024-06-03 20:48:36,554 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:36" (1/1) ... [2024-06-03 20:48:36,563 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:36" (1/1) ... [2024-06-03 20:48:36,566 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:48:36,567 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:48:36,567 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:48:36,567 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:48:36,568 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:36" (1/1) ... [2024-06-03 20:48:36,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:48:36,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:48:36,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 20:48:36,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 20:48:36,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:48:36,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:48:36,704 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:48:36,704 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:48:36,705 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:48:36,705 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:48:36,705 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:48:36,705 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:48:36,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:48:36,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:48:36,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:48:36,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:48:36,709 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 20:48:36,816 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:48:36,817 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:48:37,084 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:48:37,084 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:48:37,211 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:48:37,211 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:48:37,211 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:48:37 BoogieIcfgContainer [2024-06-03 20:48:37,212 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:48:37,213 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:48:37,213 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:48:37,216 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:48:37,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:48:34" (1/4) ... [2024-06-03 20:48:37,217 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d85bfd7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:48:37, skipping insertion in model container [2024-06-03 20:48:37,217 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:48:35" (2/4) ... [2024-06-03 20:48:37,217 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d85bfd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:48:37, skipping insertion in model container [2024-06-03 20:48:37,217 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:36" (3/4) ... [2024-06-03 20:48:37,218 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d85bfd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:48:37, skipping insertion in model container [2024-06-03 20:48:37,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:48:37" (4/4) ... [2024-06-03 20:48:37,219 INFO L112 eAbstractionObserver]: Analyzing ICFG safe031_tso.i [2024-06-03 20:48:37,234 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:48:37,235 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 20:48:37,235 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:48:37,290 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:48:37,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 20:48:37,348 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-03 20:48:37,348 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:48:37,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 20:48:37,350 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 20:48:37,353 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-03 20:48:37,369 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:48:37,376 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;@76438f11, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:48:37,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 20:48:37,381 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:48:37,381 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 20:48:37,382 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:48:37,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:37,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:48:37,383 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:37,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:37,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1782944907, now seen corresponding path program 1 times [2024-06-03 20:48:37,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:37,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013197960] [2024-06-03 20:48:37,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:37,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:38,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:38,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013197960] [2024-06-03 20:48:38,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013197960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:38,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:38,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:48:38,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135484914] [2024-06-03 20:48:38,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:38,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:48:38,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:38,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:48:38,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:48:38,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:48:38,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:38,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:38,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:48:38,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:38,439 INFO L124 PetriNetUnfolderBase]: 736/1214 cut-off events. [2024-06-03 20:48:38,439 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-03 20:48:38,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2401 conditions, 1214 events. 736/1214 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6177 event pairs, 471 based on Foata normal form. 1/1159 useless extension candidates. Maximal degree in co-relation 2386. Up to 1122 conditions per place. [2024-06-03 20:48:38,455 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 31 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-03 20:48:38,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 171 flow [2024-06-03 20:48:38,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:48:38,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:48:38,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-06-03 20:48:38,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6587301587301587 [2024-06-03 20:48:38,469 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 83 transitions. [2024-06-03 20:48:38,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 171 flow [2024-06-03 20:48:38,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:48:38,476 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-03 20:48:38,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-03 20:48:38,481 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-03 20:48:38,482 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-03 20:48:38,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:38,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:38,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:38,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:48:38,483 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:38,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:38,484 INFO L85 PathProgramCache]: Analyzing trace with hash 281906836, now seen corresponding path program 1 times [2024-06-03 20:48:38,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:38,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694850044] [2024-06-03 20:48:38,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:38,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:38,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:38,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694850044] [2024-06-03 20:48:38,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694850044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:38,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:38,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:48:38,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908629424] [2024-06-03 20:48:38,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:38,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:48:38,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:38,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:48:38,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:48:38,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:48:38,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:38,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:38,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:48:38,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:39,026 INFO L124 PetriNetUnfolderBase]: 730/1205 cut-off events. [2024-06-03 20:48:39,026 INFO L125 PetriNetUnfolderBase]: For 237/237 co-relation queries the response was YES. [2024-06-03 20:48:39,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2742 conditions, 1205 events. 730/1205 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6134 event pairs, 403 based on Foata normal form. 3/1182 useless extension candidates. Maximal degree in co-relation 2727. Up to 1098 conditions per place. [2024-06-03 20:48:39,034 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 38 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-03 20:48:39,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 238 flow [2024-06-03 20:48:39,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:48:39,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:48:39,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2024-06-03 20:48:39,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-03 20:48:39,037 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 108 transitions. [2024-06-03 20:48:39,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 238 flow [2024-06-03 20:48:39,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:48:39,039 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-03 20:48:39,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-03 20:48:39,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-03 20:48:39,040 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-03 20:48:39,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:39,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:39,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:39,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:48:39,041 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:39,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:39,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1529058956, now seen corresponding path program 1 times [2024-06-03 20:48:39,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:39,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412895173] [2024-06-03 20:48:39,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:39,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:39,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:39,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412895173] [2024-06-03 20:48:39,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412895173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:39,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:39,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:48:39,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868454247] [2024-06-03 20:48:39,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:39,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:48:39,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:39,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:48:39,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:48:39,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:39,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:39,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:39,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:39,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:39,560 INFO L124 PetriNetUnfolderBase]: 929/1500 cut-off events. [2024-06-03 20:48:39,561 INFO L125 PetriNetUnfolderBase]: For 749/749 co-relation queries the response was YES. [2024-06-03 20:48:39,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3813 conditions, 1500 events. 929/1500 cut-off events. For 749/749 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7391 event pairs, 537 based on Foata normal form. 2/1476 useless extension candidates. Maximal degree in co-relation 3796. Up to 1397 conditions per place. [2024-06-03 20:48:39,573 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 39 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-03 20:48:39,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 53 transitions, 270 flow [2024-06-03 20:48:39,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:48:39,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:48:39,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-03 20:48:39,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-03 20:48:39,579 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 4 states and 101 transitions. [2024-06-03 20:48:39,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 53 transitions, 270 flow [2024-06-03 20:48:39,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 53 transitions, 256 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 20:48:39,584 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 164 flow [2024-06-03 20:48:39,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2024-06-03 20:48:39,585 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2024-06-03 20:48:39,586 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 164 flow [2024-06-03 20:48:39,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:39,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:39,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:39,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:48:39,587 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:39,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:39,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1136654126, now seen corresponding path program 1 times [2024-06-03 20:48:39,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:39,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134938410] [2024-06-03 20:48:39,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:39,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:39,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:39,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134938410] [2024-06-03 20:48:39,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134938410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:39,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:39,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:48:39,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228975285] [2024-06-03 20:48:39,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:39,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:48:39,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:39,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:48:39,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:48:39,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:39,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 164 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:39,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:39,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:39,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:40,209 INFO L124 PetriNetUnfolderBase]: 920/1491 cut-off events. [2024-06-03 20:48:40,209 INFO L125 PetriNetUnfolderBase]: For 1286/1286 co-relation queries the response was YES. [2024-06-03 20:48:40,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4130 conditions, 1491 events. 920/1491 cut-off events. For 1286/1286 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7417 event pairs, 290 based on Foata normal form. 6/1479 useless extension candidates. Maximal degree in co-relation 4112. Up to 1331 conditions per place. [2024-06-03 20:48:40,222 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 53 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-03 20:48:40,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 72 transitions, 378 flow [2024-06-03 20:48:40,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:40,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:40,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 20:48:40,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-03 20:48:40,224 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 164 flow. Second operand 6 states and 149 transitions. [2024-06-03 20:48:40,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 72 transitions, 378 flow [2024-06-03 20:48:40,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 362 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 20:48:40,228 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 207 flow [2024-06-03 20:48:40,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-03 20:48:40,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-03 20:48:40,229 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 207 flow [2024-06-03 20:48:40,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:40,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:40,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:40,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:48:40,230 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:40,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:40,230 INFO L85 PathProgramCache]: Analyzing trace with hash 156188673, now seen corresponding path program 1 times [2024-06-03 20:48:40,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:40,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764770426] [2024-06-03 20:48:40,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:40,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:40,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:40,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764770426] [2024-06-03 20:48:40,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764770426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:40,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:40,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:48:40,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146473517] [2024-06-03 20:48:40,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:40,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:48:40,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:40,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:48:40,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:48:40,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:40,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 207 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:40,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:40,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:40,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:40,763 INFO L124 PetriNetUnfolderBase]: 922/1502 cut-off events. [2024-06-03 20:48:40,763 INFO L125 PetriNetUnfolderBase]: For 2164/2164 co-relation queries the response was YES. [2024-06-03 20:48:40,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4536 conditions, 1502 events. 922/1502 cut-off events. For 2164/2164 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7422 event pairs, 359 based on Foata normal form. 3/1504 useless extension candidates. Maximal degree in co-relation 4516. Up to 1357 conditions per place. [2024-06-03 20:48:40,777 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 51 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-03 20:48:40,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 74 transitions, 449 flow [2024-06-03 20:48:40,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:48:40,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:48:40,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-03 20:48:40,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-06-03 20:48:40,780 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 207 flow. Second operand 5 states and 127 transitions. [2024-06-03 20:48:40,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 74 transitions, 449 flow [2024-06-03 20:48:40,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 74 transitions, 420 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-03 20:48:40,788 INFO L231 Difference]: Finished difference. Result has 56 places, 57 transitions, 297 flow [2024-06-03 20:48:40,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=297, PETRI_PLACES=56, PETRI_TRANSITIONS=57} [2024-06-03 20:48:40,791 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-03 20:48:40,792 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 57 transitions, 297 flow [2024-06-03 20:48:40,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:40,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:40,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:40,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:48:40,796 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:40,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:40,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1148260319, now seen corresponding path program 1 times [2024-06-03 20:48:40,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:40,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461143250] [2024-06-03 20:48:40,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:40,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:41,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:41,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461143250] [2024-06-03 20:48:41,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461143250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:41,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:41,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:48:41,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927271562] [2024-06-03 20:48:41,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:41,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:48:41,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:41,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:48:41,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:48:41,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:41,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 57 transitions, 297 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:41,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:41,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:41,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:41,374 INFO L124 PetriNetUnfolderBase]: 933/1547 cut-off events. [2024-06-03 20:48:41,374 INFO L125 PetriNetUnfolderBase]: For 3582/3586 co-relation queries the response was YES. [2024-06-03 20:48:41,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5242 conditions, 1547 events. 933/1547 cut-off events. For 3582/3586 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7817 event pairs, 352 based on Foata normal form. 6/1551 useless extension candidates. Maximal degree in co-relation 5219. Up to 1366 conditions per place. [2024-06-03 20:48:41,388 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 61 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2024-06-03 20:48:41,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 83 transitions, 563 flow [2024-06-03 20:48:41,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:48:41,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:48:41,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-03 20:48:41,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-03 20:48:41,390 INFO L175 Difference]: Start difference. First operand has 56 places, 57 transitions, 297 flow. Second operand 5 states and 128 transitions. [2024-06-03 20:48:41,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 83 transitions, 563 flow [2024-06-03 20:48:41,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 551 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-03 20:48:41,397 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 373 flow [2024-06-03 20:48:41,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=373, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-06-03 20:48:41,400 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-03 20:48:41,400 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 373 flow [2024-06-03 20:48:41,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:41,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:41,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:41,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:48:41,401 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:41,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:41,402 INFO L85 PathProgramCache]: Analyzing trace with hash 571898403, now seen corresponding path program 2 times [2024-06-03 20:48:41,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:41,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171427498] [2024-06-03 20:48:41,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:41,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:41,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:41,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171427498] [2024-06-03 20:48:41,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171427498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:41,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:41,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:48:41,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127210266] [2024-06-03 20:48:41,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:41,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:48:41,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:41,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:48:41,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:48:41,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:41,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 373 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:41,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:41,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:41,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:41,965 INFO L124 PetriNetUnfolderBase]: 928/1539 cut-off events. [2024-06-03 20:48:41,966 INFO L125 PetriNetUnfolderBase]: For 4728/4728 co-relation queries the response was YES. [2024-06-03 20:48:41,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5602 conditions, 1539 events. 928/1539 cut-off events. For 4728/4728 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7686 event pairs, 348 based on Foata normal form. 2/1539 useless extension candidates. Maximal degree in co-relation 5576. Up to 1361 conditions per place. [2024-06-03 20:48:41,979 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 66 selfloop transitions, 16 changer transitions 0/89 dead transitions. [2024-06-03 20:48:41,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 89 transitions, 603 flow [2024-06-03 20:48:41,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:41,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:41,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 20:48:41,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-03 20:48:41,981 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 373 flow. Second operand 7 states and 166 transitions. [2024-06-03 20:48:41,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 89 transitions, 603 flow [2024-06-03 20:48:41,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 89 transitions, 567 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-03 20:48:41,991 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 377 flow [2024-06-03 20:48:41,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=377, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-06-03 20:48:41,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-03 20:48:41,992 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 377 flow [2024-06-03 20:48:41,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:41,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:41,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:41,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:48:41,993 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:41,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:41,993 INFO L85 PathProgramCache]: Analyzing trace with hash 2146762988, now seen corresponding path program 1 times [2024-06-03 20:48:41,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:41,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539329934] [2024-06-03 20:48:41,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:41,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:42,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:42,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539329934] [2024-06-03 20:48:42,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539329934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:42,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:42,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:42,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425400780] [2024-06-03 20:48:42,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:42,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:42,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:42,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:42,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:42,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:42,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 377 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:42,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:42,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:42,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:42,581 INFO L124 PetriNetUnfolderBase]: 1001/1640 cut-off events. [2024-06-03 20:48:42,581 INFO L125 PetriNetUnfolderBase]: For 5704/5704 co-relation queries the response was YES. [2024-06-03 20:48:42,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6045 conditions, 1640 events. 1001/1640 cut-off events. For 5704/5704 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8281 event pairs, 328 based on Foata normal form. 4/1642 useless extension candidates. Maximal degree in co-relation 6017. Up to 1286 conditions per place. [2024-06-03 20:48:42,595 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 72 selfloop transitions, 35 changer transitions 0/114 dead transitions. [2024-06-03 20:48:42,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 114 transitions, 861 flow [2024-06-03 20:48:42,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:42,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:42,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-03 20:48:42,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-03 20:48:42,601 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 377 flow. Second operand 7 states and 183 transitions. [2024-06-03 20:48:42,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 114 transitions, 861 flow [2024-06-03 20:48:42,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 114 transitions, 817 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:42,611 INFO L231 Difference]: Finished difference. Result has 70 places, 82 transitions, 556 flow [2024-06-03 20:48:42,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=556, PETRI_PLACES=70, PETRI_TRANSITIONS=82} [2024-06-03 20:48:42,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-03 20:48:42,614 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 82 transitions, 556 flow [2024-06-03 20:48:42,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:42,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:42,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:42,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:48:42,615 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:42,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:42,615 INFO L85 PathProgramCache]: Analyzing trace with hash 548982602, now seen corresponding path program 2 times [2024-06-03 20:48:42,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:42,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944748917] [2024-06-03 20:48:42,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:42,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:42,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:42,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:42,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944748917] [2024-06-03 20:48:42,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944748917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:42,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:42,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:42,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16859838] [2024-06-03 20:48:42,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:42,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:42,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:42,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:42,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:42,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:42,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 82 transitions, 556 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:42,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:42,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:42,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:43,247 INFO L124 PetriNetUnfolderBase]: 1026/1687 cut-off events. [2024-06-03 20:48:43,248 INFO L125 PetriNetUnfolderBase]: For 8153/8153 co-relation queries the response was YES. [2024-06-03 20:48:43,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7184 conditions, 1687 events. 1026/1687 cut-off events. For 8153/8153 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8565 event pairs, 322 based on Foata normal form. 4/1690 useless extension candidates. Maximal degree in co-relation 7153. Up to 1311 conditions per place. [2024-06-03 20:48:43,275 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 82 selfloop transitions, 44 changer transitions 0/133 dead transitions. [2024-06-03 20:48:43,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 133 transitions, 1127 flow [2024-06-03 20:48:43,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:43,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:43,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-03 20:48:43,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-03 20:48:43,280 INFO L175 Difference]: Start difference. First operand has 70 places, 82 transitions, 556 flow. Second operand 8 states and 208 transitions. [2024-06-03 20:48:43,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 133 transitions, 1127 flow [2024-06-03 20:48:43,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 133 transitions, 1074 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-03 20:48:43,300 INFO L231 Difference]: Finished difference. Result has 80 places, 95 transitions, 762 flow [2024-06-03 20:48:43,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=762, PETRI_PLACES=80, PETRI_TRANSITIONS=95} [2024-06-03 20:48:43,302 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-03 20:48:43,302 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 95 transitions, 762 flow [2024-06-03 20:48:43,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:43,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:43,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:43,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:48:43,303 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:43,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:43,303 INFO L85 PathProgramCache]: Analyzing trace with hash -482706588, now seen corresponding path program 3 times [2024-06-03 20:48:43,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:43,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111112241] [2024-06-03 20:48:43,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:43,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:43,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:43,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111112241] [2024-06-03 20:48:43,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111112241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:43,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:43,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:43,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451927526] [2024-06-03 20:48:43,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:43,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:43,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:43,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:43,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:43,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:43,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 95 transitions, 762 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:43,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:43,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:43,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:43,951 INFO L124 PetriNetUnfolderBase]: 1051/1734 cut-off events. [2024-06-03 20:48:43,951 INFO L125 PetriNetUnfolderBase]: For 10617/10617 co-relation queries the response was YES. [2024-06-03 20:48:43,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8092 conditions, 1734 events. 1051/1734 cut-off events. For 10617/10617 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8968 event pairs, 321 based on Foata normal form. 4/1737 useless extension candidates. Maximal degree in co-relation 8056. Up to 1337 conditions per place. [2024-06-03 20:48:43,967 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 80 selfloop transitions, 57 changer transitions 0/144 dead transitions. [2024-06-03 20:48:43,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 144 transitions, 1328 flow [2024-06-03 20:48:43,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:43,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:43,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-03 20:48:43,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6058201058201058 [2024-06-03 20:48:43,970 INFO L175 Difference]: Start difference. First operand has 80 places, 95 transitions, 762 flow. Second operand 9 states and 229 transitions. [2024-06-03 20:48:43,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 144 transitions, 1328 flow [2024-06-03 20:48:43,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 144 transitions, 1260 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-03 20:48:43,995 INFO L231 Difference]: Finished difference. Result has 88 places, 105 transitions, 977 flow [2024-06-03 20:48:43,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=977, PETRI_PLACES=88, PETRI_TRANSITIONS=105} [2024-06-03 20:48:43,997 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-03 20:48:43,997 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 105 transitions, 977 flow [2024-06-03 20:48:43,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:43,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:43,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:43,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:48:43,998 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:43,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:43,999 INFO L85 PathProgramCache]: Analyzing trace with hash -226498208, now seen corresponding path program 1 times [2024-06-03 20:48:43,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:43,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528327192] [2024-06-03 20:48:43,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:43,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:44,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:44,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:44,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528327192] [2024-06-03 20:48:44,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528327192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:44,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:44,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:48:44,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198523788] [2024-06-03 20:48:44,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:44,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:48:44,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:44,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:48:44,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:48:44,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:44,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 105 transitions, 977 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 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) [2024-06-03 20:48:44,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:44,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:44,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:44,563 INFO L124 PetriNetUnfolderBase]: 1054/1758 cut-off events. [2024-06-03 20:48:44,564 INFO L125 PetriNetUnfolderBase]: For 13311/13311 co-relation queries the response was YES. [2024-06-03 20:48:44,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8624 conditions, 1758 events. 1054/1758 cut-off events. For 13311/13311 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9067 event pairs, 317 based on Foata normal form. 6/1763 useless extension candidates. Maximal degree in co-relation 8585. Up to 1518 conditions per place. [2024-06-03 20:48:44,579 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 104 selfloop transitions, 19 changer transitions 0/130 dead transitions. [2024-06-03 20:48:44,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 1353 flow [2024-06-03 20:48:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:44,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:44,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 20:48:44,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-03 20:48:44,581 INFO L175 Difference]: Start difference. First operand has 88 places, 105 transitions, 977 flow. Second operand 6 states and 149 transitions. [2024-06-03 20:48:44,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 1353 flow [2024-06-03 20:48:44,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 130 transitions, 1266 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:44,606 INFO L231 Difference]: Finished difference. Result has 89 places, 108 transitions, 978 flow [2024-06-03 20:48:44,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=978, PETRI_PLACES=89, PETRI_TRANSITIONS=108} [2024-06-03 20:48:44,607 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-03 20:48:44,607 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 108 transitions, 978 flow [2024-06-03 20:48:44,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 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) [2024-06-03 20:48:44,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:44,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:44,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:48:44,608 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:44,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:44,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1423829980, now seen corresponding path program 1 times [2024-06-03 20:48:44,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:44,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447916251] [2024-06-03 20:48:44,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:44,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:44,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:44,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447916251] [2024-06-03 20:48:44,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447916251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:44,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:44,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:48:44,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614950185] [2024-06-03 20:48:44,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:44,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:48:44,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:44,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:48:44,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:48:44,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:48:44,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 108 transitions, 978 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:44,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:44,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:48:44,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:45,096 INFO L124 PetriNetUnfolderBase]: 1011/1712 cut-off events. [2024-06-03 20:48:45,096 INFO L125 PetriNetUnfolderBase]: For 13648/13648 co-relation queries the response was YES. [2024-06-03 20:48:45,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8365 conditions, 1712 events. 1011/1712 cut-off events. For 13648/13648 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8939 event pairs, 334 based on Foata normal form. 1/1712 useless extension candidates. Maximal degree in co-relation 8325. Up to 1421 conditions per place. [2024-06-03 20:48:45,113 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 89 selfloop transitions, 7 changer transitions 0/116 dead transitions. [2024-06-03 20:48:45,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 116 transitions, 1190 flow [2024-06-03 20:48:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:48:45,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:48:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-03 20:48:45,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-03 20:48:45,115 INFO L175 Difference]: Start difference. First operand has 89 places, 108 transitions, 978 flow. Second operand 4 states and 99 transitions. [2024-06-03 20:48:45,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 116 transitions, 1190 flow [2024-06-03 20:48:45,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 116 transitions, 1120 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:45,139 INFO L231 Difference]: Finished difference. Result has 89 places, 108 transitions, 928 flow [2024-06-03 20:48:45,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=928, PETRI_PLACES=89, PETRI_TRANSITIONS=108} [2024-06-03 20:48:45,140 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-03 20:48:45,141 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 108 transitions, 928 flow [2024-06-03 20:48:45,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:45,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:45,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:45,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:48:45,142 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:45,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:45,143 INFO L85 PathProgramCache]: Analyzing trace with hash 323701376, now seen corresponding path program 1 times [2024-06-03 20:48:45,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:45,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898471517] [2024-06-03 20:48:45,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:45,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:45,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:45,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898471517] [2024-06-03 20:48:45,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898471517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:45,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:45,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:45,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280019092] [2024-06-03 20:48:45,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:45,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:45,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:45,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:45,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:45,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:45,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 108 transitions, 928 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:45,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:45,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:45,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:45,746 INFO L124 PetriNetUnfolderBase]: 1062/1772 cut-off events. [2024-06-03 20:48:45,747 INFO L125 PetriNetUnfolderBase]: For 15005/15005 co-relation queries the response was YES. [2024-06-03 20:48:45,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8682 conditions, 1772 events. 1062/1772 cut-off events. For 15005/15005 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9153 event pairs, 319 based on Foata normal form. 2/1773 useless extension candidates. Maximal degree in co-relation 8641. Up to 1554 conditions per place. [2024-06-03 20:48:45,762 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 116 selfloop transitions, 13 changer transitions 0/136 dead transitions. [2024-06-03 20:48:45,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 136 transitions, 1288 flow [2024-06-03 20:48:45,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:45,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:45,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 20:48:45,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-03 20:48:45,764 INFO L175 Difference]: Start difference. First operand has 89 places, 108 transitions, 928 flow. Second operand 6 states and 148 transitions. [2024-06-03 20:48:45,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 136 transitions, 1288 flow [2024-06-03 20:48:45,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 136 transitions, 1268 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-03 20:48:45,792 INFO L231 Difference]: Finished difference. Result has 92 places, 111 transitions, 986 flow [2024-06-03 20:48:45,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=986, PETRI_PLACES=92, PETRI_TRANSITIONS=111} [2024-06-03 20:48:45,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-03 20:48:45,793 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 111 transitions, 986 flow [2024-06-03 20:48:45,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:45,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:45,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:45,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:48:45,794 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:45,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:45,795 INFO L85 PathProgramCache]: Analyzing trace with hash 328462976, now seen corresponding path program 2 times [2024-06-03 20:48:45,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:45,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267778553] [2024-06-03 20:48:45,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:45,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:46,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:46,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267778553] [2024-06-03 20:48:46,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267778553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:46,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:46,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:46,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100177279] [2024-06-03 20:48:46,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:46,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:46,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:46,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:46,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:46,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:46,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 111 transitions, 986 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:46,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:46,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:46,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:46,345 INFO L124 PetriNetUnfolderBase]: 1073/1798 cut-off events. [2024-06-03 20:48:46,346 INFO L125 PetriNetUnfolderBase]: For 17691/17695 co-relation queries the response was YES. [2024-06-03 20:48:46,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9168 conditions, 1798 events. 1073/1798 cut-off events. For 17691/17695 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9379 event pairs, 323 based on Foata normal form. 6/1803 useless extension candidates. Maximal degree in co-relation 9127. Up to 1523 conditions per place. [2024-06-03 20:48:46,362 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 109 selfloop transitions, 25 changer transitions 0/141 dead transitions. [2024-06-03 20:48:46,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 141 transitions, 1452 flow [2024-06-03 20:48:46,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:46,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:46,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-03 20:48:46,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-03 20:48:46,364 INFO L175 Difference]: Start difference. First operand has 92 places, 111 transitions, 986 flow. Second operand 6 states and 151 transitions. [2024-06-03 20:48:46,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 141 transitions, 1452 flow [2024-06-03 20:48:46,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 141 transitions, 1398 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:46,398 INFO L231 Difference]: Finished difference. Result has 94 places, 117 transitions, 1084 flow [2024-06-03 20:48:46,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1084, PETRI_PLACES=94, PETRI_TRANSITIONS=117} [2024-06-03 20:48:46,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-03 20:48:46,399 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 117 transitions, 1084 flow [2024-06-03 20:48:46,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:46,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:46,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:46,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:48:46,400 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:46,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:46,400 INFO L85 PathProgramCache]: Analyzing trace with hash -161414142, now seen corresponding path program 3 times [2024-06-03 20:48:46,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:46,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844916647] [2024-06-03 20:48:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:46,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:46,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:46,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:46,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844916647] [2024-06-03 20:48:46,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844916647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:46,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:46,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:46,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065086059] [2024-06-03 20:48:46,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:46,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:46,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:46,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:46,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:46,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:46,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 117 transitions, 1084 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:46,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:46,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:46,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:47,044 INFO L124 PetriNetUnfolderBase]: 1068/1790 cut-off events. [2024-06-03 20:48:47,045 INFO L125 PetriNetUnfolderBase]: For 20004/20004 co-relation queries the response was YES. [2024-06-03 20:48:47,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9426 conditions, 1790 events. 1068/1790 cut-off events. For 20004/20004 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9295 event pairs, 319 based on Foata normal form. 2/1791 useless extension candidates. Maximal degree in co-relation 9384. Up to 1518 conditions per place. [2024-06-03 20:48:47,061 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 114 selfloop transitions, 26 changer transitions 0/147 dead transitions. [2024-06-03 20:48:47,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 147 transitions, 1440 flow [2024-06-03 20:48:47,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:47,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:47,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-03 20:48:47,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-03 20:48:47,064 INFO L175 Difference]: Start difference. First operand has 94 places, 117 transitions, 1084 flow. Second operand 8 states and 189 transitions. [2024-06-03 20:48:47,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 147 transitions, 1440 flow [2024-06-03 20:48:47,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 147 transitions, 1362 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-03 20:48:47,100 INFO L231 Difference]: Finished difference. Result has 100 places, 117 transitions, 1066 flow [2024-06-03 20:48:47,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1066, PETRI_PLACES=100, PETRI_TRANSITIONS=117} [2024-06-03 20:48:47,101 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-03 20:48:47,101 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 117 transitions, 1066 flow [2024-06-03 20:48:47,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:47,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:47,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:47,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:48:47,102 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:47,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:47,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1188365619, now seen corresponding path program 1 times [2024-06-03 20:48:47,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:47,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676149741] [2024-06-03 20:48:47,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:47,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:47,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:47,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:47,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676149741] [2024-06-03 20:48:47,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676149741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:47,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:47,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:48:47,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651308159] [2024-06-03 20:48:47,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:47,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:48:47,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:47,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:48:47,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:48:47,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:48:47,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 117 transitions, 1066 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:47,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:47,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:48:47,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:47,683 INFO L124 PetriNetUnfolderBase]: 1025/1749 cut-off events. [2024-06-03 20:48:47,683 INFO L125 PetriNetUnfolderBase]: For 20856/20866 co-relation queries the response was YES. [2024-06-03 20:48:47,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9254 conditions, 1749 events. 1025/1749 cut-off events. For 20856/20866 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9176 event pairs, 310 based on Foata normal form. 3/1748 useless extension candidates. Maximal degree in co-relation 9210. Up to 1401 conditions per place. [2024-06-03 20:48:47,702 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 97 selfloop transitions, 25 changer transitions 0/142 dead transitions. [2024-06-03 20:48:47,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 142 transitions, 1444 flow [2024-06-03 20:48:47,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:47,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:47,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 20:48:47,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-03 20:48:47,704 INFO L175 Difference]: Start difference. First operand has 100 places, 117 transitions, 1066 flow. Second operand 7 states and 165 transitions. [2024-06-03 20:48:47,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 142 transitions, 1444 flow [2024-06-03 20:48:47,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 142 transitions, 1372 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:47,741 INFO L231 Difference]: Finished difference. Result has 101 places, 124 transitions, 1134 flow [2024-06-03 20:48:47,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1134, PETRI_PLACES=101, PETRI_TRANSITIONS=124} [2024-06-03 20:48:47,743 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-03 20:48:47,743 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 124 transitions, 1134 flow [2024-06-03 20:48:47,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:47,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:47,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:47,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:48:47,744 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:47,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:47,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1449249931, now seen corresponding path program 1 times [2024-06-03 20:48:47,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:47,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751526318] [2024-06-03 20:48:47,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:47,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:47,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:47,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:47,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751526318] [2024-06-03 20:48:47,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751526318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:47,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:47,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:47,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023349438] [2024-06-03 20:48:47,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:48,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:48,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:48,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:48,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:48,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:48,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 124 transitions, 1134 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:48,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:48,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:48,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:48,404 INFO L124 PetriNetUnfolderBase]: 1120/1875 cut-off events. [2024-06-03 20:48:48,404 INFO L125 PetriNetUnfolderBase]: For 24104/24104 co-relation queries the response was YES. [2024-06-03 20:48:48,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10337 conditions, 1875 events. 1120/1875 cut-off events. For 24104/24104 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9862 event pairs, 296 based on Foata normal form. 4/1878 useless extension candidates. Maximal degree in co-relation 10291. Up to 1565 conditions per place. [2024-06-03 20:48:48,423 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 124 selfloop transitions, 36 changer transitions 0/167 dead transitions. [2024-06-03 20:48:48,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 167 transitions, 1738 flow [2024-06-03 20:48:48,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:48,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:48,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-03 20:48:48,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-03 20:48:48,425 INFO L175 Difference]: Start difference. First operand has 101 places, 124 transitions, 1134 flow. Second operand 8 states and 202 transitions. [2024-06-03 20:48:48,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 167 transitions, 1738 flow [2024-06-03 20:48:48,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 167 transitions, 1655 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:48,473 INFO L231 Difference]: Finished difference. Result has 105 places, 134 transitions, 1262 flow [2024-06-03 20:48:48,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1262, PETRI_PLACES=105, PETRI_TRANSITIONS=134} [2024-06-03 20:48:48,474 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-03 20:48:48,474 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 134 transitions, 1262 flow [2024-06-03 20:48:48,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:48,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:48,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:48,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:48:48,475 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:48,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:48,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1592418957, now seen corresponding path program 2 times [2024-06-03 20:48:48,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:48,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624360017] [2024-06-03 20:48:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:48,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:48,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:48,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:48,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624360017] [2024-06-03 20:48:48,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624360017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:48,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:48,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:48,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606827822] [2024-06-03 20:48:48,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:48,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:48,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:48,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:48,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:48,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:48,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 134 transitions, 1262 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:48,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:48,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:48,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:49,140 INFO L124 PetriNetUnfolderBase]: 1209/2021 cut-off events. [2024-06-03 20:48:49,141 INFO L125 PetriNetUnfolderBase]: For 29325/29325 co-relation queries the response was YES. [2024-06-03 20:48:49,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11687 conditions, 2021 events. 1209/2021 cut-off events. For 29325/29325 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10795 event pairs, 290 based on Foata normal form. 4/2023 useless extension candidates. Maximal degree in co-relation 11640. Up to 1311 conditions per place. [2024-06-03 20:48:49,161 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 104 selfloop transitions, 78 changer transitions 0/189 dead transitions. [2024-06-03 20:48:49,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 189 transitions, 2224 flow [2024-06-03 20:48:49,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:49,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:49,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-03 20:48:49,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-03 20:48:49,163 INFO L175 Difference]: Start difference. First operand has 105 places, 134 transitions, 1262 flow. Second operand 8 states and 212 transitions. [2024-06-03 20:48:49,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 189 transitions, 2224 flow [2024-06-03 20:48:49,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 189 transitions, 2081 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:49,213 INFO L231 Difference]: Finished difference. Result has 110 places, 151 transitions, 1503 flow [2024-06-03 20:48:49,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1125, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1503, PETRI_PLACES=110, PETRI_TRANSITIONS=151} [2024-06-03 20:48:49,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-03 20:48:49,213 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 151 transitions, 1503 flow [2024-06-03 20:48:49,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:49,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:49,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:49,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:48:49,214 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:49,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:49,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1454963851, now seen corresponding path program 3 times [2024-06-03 20:48:49,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:49,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810906488] [2024-06-03 20:48:49,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:49,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:49,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:49,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810906488] [2024-06-03 20:48:49,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810906488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:49,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:49,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:49,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589776761] [2024-06-03 20:48:49,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:49,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:49,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:49,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:49,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:49,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:49,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 151 transitions, 1503 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:49,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:49,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:49,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:49,851 INFO L124 PetriNetUnfolderBase]: 1210/2026 cut-off events. [2024-06-03 20:48:49,852 INFO L125 PetriNetUnfolderBase]: For 33131/33131 co-relation queries the response was YES. [2024-06-03 20:48:49,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12339 conditions, 2026 events. 1210/2026 cut-off events. For 33131/33131 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10877 event pairs, 290 based on Foata normal form. 4/2028 useless extension candidates. Maximal degree in co-relation 12290. Up to 1313 conditions per place. [2024-06-03 20:48:49,874 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 97 selfloop transitions, 87 changer transitions 0/191 dead transitions. [2024-06-03 20:48:49,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 191 transitions, 2275 flow [2024-06-03 20:48:49,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:49,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:49,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-03 20:48:49,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-03 20:48:49,876 INFO L175 Difference]: Start difference. First operand has 110 places, 151 transitions, 1503 flow. Second operand 8 states and 210 transitions. [2024-06-03 20:48:49,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 191 transitions, 2275 flow [2024-06-03 20:48:49,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 191 transitions, 2120 flow, removed 61 selfloop flow, removed 2 redundant places. [2024-06-03 20:48:49,933 INFO L231 Difference]: Finished difference. Result has 116 places, 156 transitions, 1614 flow [2024-06-03 20:48:49,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1614, PETRI_PLACES=116, PETRI_TRANSITIONS=156} [2024-06-03 20:48:49,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-03 20:48:49,934 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 156 transitions, 1614 flow [2024-06-03 20:48:49,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:49,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:49,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:49,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:48:49,935 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:49,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:49,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1592634283, now seen corresponding path program 1 times [2024-06-03 20:48:49,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:49,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732917286] [2024-06-03 20:48:49,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:49,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:50,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:50,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732917286] [2024-06-03 20:48:50,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732917286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:50,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:50,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:50,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189507949] [2024-06-03 20:48:50,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:50,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:50,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:50,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:50,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:50,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:50,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 156 transitions, 1614 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:50,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:50,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:50,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:50,663 INFO L124 PetriNetUnfolderBase]: 1276/2137 cut-off events. [2024-06-03 20:48:50,664 INFO L125 PetriNetUnfolderBase]: For 37887/37887 co-relation queries the response was YES. [2024-06-03 20:48:50,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12916 conditions, 2137 events. 1276/2137 cut-off events. For 37887/37887 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11600 event pairs, 297 based on Foata normal form. 14/2149 useless extension candidates. Maximal degree in co-relation 12865. Up to 1608 conditions per place. [2024-06-03 20:48:50,686 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 131 selfloop transitions, 56 changer transitions 0/194 dead transitions. [2024-06-03 20:48:50,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 194 transitions, 2284 flow [2024-06-03 20:48:50,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:50,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-03 20:48:50,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2024-06-03 20:48:50,690 INFO L175 Difference]: Start difference. First operand has 116 places, 156 transitions, 1614 flow. Second operand 8 states and 207 transitions. [2024-06-03 20:48:50,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 194 transitions, 2284 flow [2024-06-03 20:48:50,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 194 transitions, 2107 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:50,738 INFO L231 Difference]: Finished difference. Result has 119 places, 159 transitions, 1612 flow [2024-06-03 20:48:50,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1437, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1612, PETRI_PLACES=119, PETRI_TRANSITIONS=159} [2024-06-03 20:48:50,739 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-03 20:48:50,739 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 159 transitions, 1612 flow [2024-06-03 20:48:50,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:50,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:50,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:50,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:48:50,740 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:50,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:50,741 INFO L85 PathProgramCache]: Analyzing trace with hash -425291775, now seen corresponding path program 1 times [2024-06-03 20:48:50,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:50,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023175815] [2024-06-03 20:48:50,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:50,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:51,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:51,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023175815] [2024-06-03 20:48:51,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023175815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:51,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:51,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:48:51,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140090315] [2024-06-03 20:48:51,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:51,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:48:51,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:51,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:48:51,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:48:51,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:48:51,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 159 transitions, 1612 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:51,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:51,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:48:51,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:51,327 INFO L124 PetriNetUnfolderBase]: 1207/2075 cut-off events. [2024-06-03 20:48:51,327 INFO L125 PetriNetUnfolderBase]: For 36762/36786 co-relation queries the response was YES. [2024-06-03 20:48:51,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12605 conditions, 2075 events. 1207/2075 cut-off events. For 36762/36786 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11478 event pairs, 303 based on Foata normal form. 2/2070 useless extension candidates. Maximal degree in co-relation 12553. Up to 1653 conditions per place. [2024-06-03 20:48:51,353 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 131 selfloop transitions, 29 changer transitions 0/181 dead transitions. [2024-06-03 20:48:51,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 181 transitions, 2088 flow [2024-06-03 20:48:51,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:51,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 20:48:51,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-03 20:48:51,355 INFO L175 Difference]: Start difference. First operand has 119 places, 159 transitions, 1612 flow. Second operand 6 states and 148 transitions. [2024-06-03 20:48:51,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 181 transitions, 2088 flow [2024-06-03 20:48:51,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 181 transitions, 1941 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:51,409 INFO L231 Difference]: Finished difference. Result has 119 places, 164 transitions, 1606 flow [2024-06-03 20:48:51,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1606, PETRI_PLACES=119, PETRI_TRANSITIONS=164} [2024-06-03 20:48:51,410 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-03 20:48:51,410 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 164 transitions, 1606 flow [2024-06-03 20:48:51,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:51,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:51,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:51,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:48:51,412 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:51,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:51,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1369055551, now seen corresponding path program 4 times [2024-06-03 20:48:51,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:51,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418909697] [2024-06-03 20:48:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:51,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:51,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:51,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418909697] [2024-06-03 20:48:51,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418909697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:51,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:51,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:51,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182350166] [2024-06-03 20:48:51,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:51,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:51,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:51,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:51,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:51,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:51,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 164 transitions, 1606 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:51,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:51,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:51,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:52,098 INFO L124 PetriNetUnfolderBase]: 1335/2246 cut-off events. [2024-06-03 20:48:52,098 INFO L125 PetriNetUnfolderBase]: For 41316/41316 co-relation queries the response was YES. [2024-06-03 20:48:52,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13480 conditions, 2246 events. 1335/2246 cut-off events. For 41316/41316 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12331 event pairs, 286 based on Foata normal form. 4/2249 useless extension candidates. Maximal degree in co-relation 13427. Up to 1470 conditions per place. [2024-06-03 20:48:52,123 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 112 selfloop transitions, 102 changer transitions 0/221 dead transitions. [2024-06-03 20:48:52,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 221 transitions, 2548 flow [2024-06-03 20:48:52,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:52,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:52,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-06-03 20:48:52,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-03 20:48:52,125 INFO L175 Difference]: Start difference. First operand has 119 places, 164 transitions, 1606 flow. Second operand 10 states and 255 transitions. [2024-06-03 20:48:52,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 221 transitions, 2548 flow [2024-06-03 20:48:52,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 221 transitions, 2494 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 20:48:52,186 INFO L231 Difference]: Finished difference. Result has 127 places, 177 transitions, 2017 flow [2024-06-03 20:48:52,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2017, PETRI_PLACES=127, PETRI_TRANSITIONS=177} [2024-06-03 20:48:52,186 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-03 20:48:52,186 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 177 transitions, 2017 flow [2024-06-03 20:48:52,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:52,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:52,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:52,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:48:52,187 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:52,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:52,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1787784151, now seen corresponding path program 5 times [2024-06-03 20:48:52,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:52,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297505157] [2024-06-03 20:48:52,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:52,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:52,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:52,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297505157] [2024-06-03 20:48:52,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297505157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:52,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:52,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:52,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294978920] [2024-06-03 20:48:52,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:52,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:52,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:52,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:52,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:52,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:52,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 177 transitions, 2017 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:52,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:52,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:52,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:52,876 INFO L124 PetriNetUnfolderBase]: 1360/2292 cut-off events. [2024-06-03 20:48:52,877 INFO L125 PetriNetUnfolderBase]: For 47406/47406 co-relation queries the response was YES. [2024-06-03 20:48:52,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14652 conditions, 2292 events. 1360/2292 cut-off events. For 47406/47406 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12670 event pairs, 288 based on Foata normal form. 4/2295 useless extension candidates. Maximal degree in co-relation 14597. Up to 1495 conditions per place. [2024-06-03 20:48:52,904 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 121 selfloop transitions, 96 changer transitions 0/224 dead transitions. [2024-06-03 20:48:52,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 224 transitions, 2929 flow [2024-06-03 20:48:52,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:52,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-03 20:48:52,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216931216931217 [2024-06-03 20:48:52,906 INFO L175 Difference]: Start difference. First operand has 127 places, 177 transitions, 2017 flow. Second operand 9 states and 235 transitions. [2024-06-03 20:48:52,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 224 transitions, 2929 flow [2024-06-03 20:48:52,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 224 transitions, 2782 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:52,988 INFO L231 Difference]: Finished difference. Result has 132 places, 184 transitions, 2223 flow [2024-06-03 20:48:52,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1882, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2223, PETRI_PLACES=132, PETRI_TRANSITIONS=184} [2024-06-03 20:48:52,989 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-03 20:48:52,989 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 184 transitions, 2223 flow [2024-06-03 20:48:52,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:52,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:52,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:52,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:48:52,990 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:52,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:52,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1814750611, now seen corresponding path program 6 times [2024-06-03 20:48:52,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:52,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281126069] [2024-06-03 20:48:52,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:52,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:53,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:53,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:53,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281126069] [2024-06-03 20:48:53,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281126069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:53,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:53,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:53,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089312204] [2024-06-03 20:48:53,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:53,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:53,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:53,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:53,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:53,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:53,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 184 transitions, 2223 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:53,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:53,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:53,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:53,689 INFO L124 PetriNetUnfolderBase]: 1353/2283 cut-off events. [2024-06-03 20:48:53,689 INFO L125 PetriNetUnfolderBase]: For 49017/49017 co-relation queries the response was YES. [2024-06-03 20:48:53,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14952 conditions, 2283 events. 1353/2283 cut-off events. For 49017/49017 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12569 event pairs, 288 based on Foata normal form. 4/2286 useless extension candidates. Maximal degree in co-relation 14894. Up to 1491 conditions per place. [2024-06-03 20:48:53,716 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 121 selfloop transitions, 95 changer transitions 0/223 dead transitions. [2024-06-03 20:48:53,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 223 transitions, 2981 flow [2024-06-03 20:48:53,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:53,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:53,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-03 20:48:53,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6164021164021164 [2024-06-03 20:48:53,718 INFO L175 Difference]: Start difference. First operand has 132 places, 184 transitions, 2223 flow. Second operand 9 states and 233 transitions. [2024-06-03 20:48:53,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 223 transitions, 2981 flow [2024-06-03 20:48:53,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 223 transitions, 2733 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:53,809 INFO L231 Difference]: Finished difference. Result has 136 places, 184 transitions, 2176 flow [2024-06-03 20:48:53,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2176, PETRI_PLACES=136, PETRI_TRANSITIONS=184} [2024-06-03 20:48:53,810 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-03 20:48:53,810 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 184 transitions, 2176 flow [2024-06-03 20:48:53,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:53,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:53,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:53,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:48:53,811 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:53,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:53,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1369063487, now seen corresponding path program 2 times [2024-06-03 20:48:53,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:53,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307904974] [2024-06-03 20:48:53,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:53,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:54,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:54,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307904974] [2024-06-03 20:48:54,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307904974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:54,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:54,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:54,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654705878] [2024-06-03 20:48:54,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:54,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:54,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:54,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:54,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:54,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:54,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 184 transitions, 2176 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:54,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:54,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:54,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:54,593 INFO L124 PetriNetUnfolderBase]: 1419/2402 cut-off events. [2024-06-03 20:48:54,593 INFO L125 PetriNetUnfolderBase]: For 55563/55563 co-relation queries the response was YES. [2024-06-03 20:48:54,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15489 conditions, 2402 events. 1419/2402 cut-off events. For 55563/55563 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13460 event pairs, 300 based on Foata normal form. 14/2415 useless extension candidates. Maximal degree in co-relation 15430. Up to 1819 conditions per place. [2024-06-03 20:48:54,622 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 165 selfloop transitions, 61 changer transitions 0/233 dead transitions. [2024-06-03 20:48:54,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 233 transitions, 3000 flow [2024-06-03 20:48:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:54,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:54,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-06-03 20:48:54,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6023809523809524 [2024-06-03 20:48:54,624 INFO L175 Difference]: Start difference. First operand has 136 places, 184 transitions, 2176 flow. Second operand 10 states and 253 transitions. [2024-06-03 20:48:54,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 233 transitions, 3000 flow [2024-06-03 20:48:54,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 233 transitions, 2803 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:54,713 INFO L231 Difference]: Finished difference. Result has 139 places, 187 transitions, 2172 flow [2024-06-03 20:48:54,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1979, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2172, PETRI_PLACES=139, PETRI_TRANSITIONS=187} [2024-06-03 20:48:54,714 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-03 20:48:54,714 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 187 transitions, 2172 flow [2024-06-03 20:48:54,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:54,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:54,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:54,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:48:54,715 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:54,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:54,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1548511575, now seen corresponding path program 3 times [2024-06-03 20:48:54,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:54,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127079122] [2024-06-03 20:48:54,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:54,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:54,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:54,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127079122] [2024-06-03 20:48:54,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127079122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:54,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:54,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:54,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122374827] [2024-06-03 20:48:54,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:54,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:54,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:54,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:54,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:55,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:55,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 187 transitions, 2172 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:55,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:55,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:55,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:55,492 INFO L124 PetriNetUnfolderBase]: 1590/2709 cut-off events. [2024-06-03 20:48:55,493 INFO L125 PetriNetUnfolderBase]: For 65397/65397 co-relation queries the response was YES. [2024-06-03 20:48:55,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17291 conditions, 2709 events. 1590/2709 cut-off events. For 65397/65397 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15749 event pairs, 289 based on Foata normal form. 14/2722 useless extension candidates. Maximal degree in co-relation 17231. Up to 1718 conditions per place. [2024-06-03 20:48:55,525 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 171 selfloop transitions, 68 changer transitions 0/246 dead transitions. [2024-06-03 20:48:55,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 246 transitions, 3228 flow [2024-06-03 20:48:55,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:55,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:55,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-06-03 20:48:55,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-03 20:48:55,527 INFO L175 Difference]: Start difference. First operand has 139 places, 187 transitions, 2172 flow. Second operand 10 states and 258 transitions. [2024-06-03 20:48:55,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 246 transitions, 3228 flow [2024-06-03 20:48:55,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 246 transitions, 3069 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-03 20:48:55,638 INFO L231 Difference]: Finished difference. Result has 142 places, 193 transitions, 2307 flow [2024-06-03 20:48:55,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2307, PETRI_PLACES=142, PETRI_TRANSITIONS=193} [2024-06-03 20:48:55,639 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-03 20:48:55,640 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 193 transitions, 2307 flow [2024-06-03 20:48:55,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:55,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:55,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:55,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:48:55,641 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:55,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:55,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1112562977, now seen corresponding path program 4 times [2024-06-03 20:48:55,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:55,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590859004] [2024-06-03 20:48:55,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:55,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:55,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:55,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:55,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590859004] [2024-06-03 20:48:55,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590859004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:55,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:55,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:55,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437396283] [2024-06-03 20:48:55,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:55,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:55,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:55,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:55,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:55,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:55,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 193 transitions, 2307 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:55,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:55,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:55,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:56,345 INFO L124 PetriNetUnfolderBase]: 1618/2756 cut-off events. [2024-06-03 20:48:56,346 INFO L125 PetriNetUnfolderBase]: For 69409/69409 co-relation queries the response was YES. [2024-06-03 20:48:56,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17940 conditions, 2756 events. 1618/2756 cut-off events. For 69409/69409 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 16078 event pairs, 350 based on Foata normal form. 14/2769 useless extension candidates. Maximal degree in co-relation 17878. Up to 2132 conditions per place. [2024-06-03 20:48:56,375 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 174 selfloop transitions, 56 changer transitions 0/237 dead transitions. [2024-06-03 20:48:56,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 237 transitions, 3118 flow [2024-06-03 20:48:56,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:56,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:56,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-03 20:48:56,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-03 20:48:56,377 INFO L175 Difference]: Start difference. First operand has 142 places, 193 transitions, 2307 flow. Second operand 9 states and 231 transitions. [2024-06-03 20:48:56,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 237 transitions, 3118 flow [2024-06-03 20:48:56,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 237 transitions, 2977 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:56,531 INFO L231 Difference]: Finished difference. Result has 145 places, 195 transitions, 2320 flow [2024-06-03 20:48:56,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2168, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2320, PETRI_PLACES=145, PETRI_TRANSITIONS=195} [2024-06-03 20:48:56,532 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-03 20:48:56,532 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 195 transitions, 2320 flow [2024-06-03 20:48:56,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:56,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:56,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:56,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:48:56,533 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:56,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:56,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1793935685, now seen corresponding path program 2 times [2024-06-03 20:48:56,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:56,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78905403] [2024-06-03 20:48:56,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:56,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:56,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:56,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78905403] [2024-06-03 20:48:56,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78905403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:56,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:56,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:48:56,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268856158] [2024-06-03 20:48:56,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:56,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:48:56,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:56,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:48:56,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:48:56,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:48:56,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 195 transitions, 2320 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:56,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:56,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:48:56,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:57,182 INFO L124 PetriNetUnfolderBase]: 1473/2597 cut-off events. [2024-06-03 20:48:57,182 INFO L125 PetriNetUnfolderBase]: For 64210/64220 co-relation queries the response was YES. [2024-06-03 20:48:57,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16807 conditions, 2597 events. 1473/2597 cut-off events. For 64210/64220 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15608 event pairs, 378 based on Foata normal form. 2/2595 useless extension candidates. Maximal degree in co-relation 16743. Up to 2017 conditions per place. [2024-06-03 20:48:57,202 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 159 selfloop transitions, 28 changer transitions 0/212 dead transitions. [2024-06-03 20:48:57,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 212 transitions, 2736 flow [2024-06-03 20:48:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:57,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:57,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 20:48:57,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-03 20:48:57,203 INFO L175 Difference]: Start difference. First operand has 145 places, 195 transitions, 2320 flow. Second operand 7 states and 165 transitions. [2024-06-03 20:48:57,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 212 transitions, 2736 flow [2024-06-03 20:48:57,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 212 transitions, 2593 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:57,300 INFO L231 Difference]: Finished difference. Result has 146 places, 195 transitions, 2244 flow [2024-06-03 20:48:57,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2177, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2244, PETRI_PLACES=146, PETRI_TRANSITIONS=195} [2024-06-03 20:48:57,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-03 20:48:57,301 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 195 transitions, 2244 flow [2024-06-03 20:48:57,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:57,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:57,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:57,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:48:57,302 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:57,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:57,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1679122985, now seen corresponding path program 1 times [2024-06-03 20:48:57,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:57,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297247205] [2024-06-03 20:48:57,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:57,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:57,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:57,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297247205] [2024-06-03 20:48:57,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297247205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:57,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:57,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:48:57,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135610298] [2024-06-03 20:48:57,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:57,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:48:57,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:57,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:48:57,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:48:57,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:57,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 195 transitions, 2244 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:57,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:57,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:57,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:57,933 INFO L124 PetriNetUnfolderBase]: 1604/2721 cut-off events. [2024-06-03 20:48:57,934 INFO L125 PetriNetUnfolderBase]: For 67960/67960 co-relation queries the response was YES. [2024-06-03 20:48:57,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17592 conditions, 2721 events. 1604/2721 cut-off events. For 67960/67960 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15745 event pairs, 377 based on Foata normal form. 2/2722 useless extension candidates. Maximal degree in co-relation 17527. Up to 2382 conditions per place. [2024-06-03 20:48:57,954 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 186 selfloop transitions, 18 changer transitions 0/211 dead transitions. [2024-06-03 20:48:57,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 211 transitions, 2781 flow [2024-06-03 20:48:57,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:48:57,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:48:57,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-03 20:48:57,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-06-03 20:48:57,956 INFO L175 Difference]: Start difference. First operand has 146 places, 195 transitions, 2244 flow. Second operand 5 states and 122 transitions. [2024-06-03 20:48:57,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 211 transitions, 2781 flow [2024-06-03 20:48:58,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 211 transitions, 2703 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:58,031 INFO L231 Difference]: Finished difference. Result has 144 places, 198 transitions, 2253 flow [2024-06-03 20:48:58,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2166, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2253, PETRI_PLACES=144, PETRI_TRANSITIONS=198} [2024-06-03 20:48:58,032 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-03 20:48:58,032 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 198 transitions, 2253 flow [2024-06-03 20:48:58,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:58,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:58,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:58,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:48:58,033 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:58,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:58,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1793928741, now seen corresponding path program 2 times [2024-06-03 20:48:58,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:58,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337982807] [2024-06-03 20:48:58,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:58,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:58,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:58,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337982807] [2024-06-03 20:48:58,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337982807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:58,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:58,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:48:58,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400177211] [2024-06-03 20:48:58,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:58,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:48:58,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:58,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:48:58,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:48:58,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:58,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 198 transitions, 2253 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:58,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:58,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:58,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:58,601 INFO L124 PetriNetUnfolderBase]: 1586/2687 cut-off events. [2024-06-03 20:48:58,601 INFO L125 PetriNetUnfolderBase]: For 70753/70753 co-relation queries the response was YES. [2024-06-03 20:48:58,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17489 conditions, 2687 events. 1586/2687 cut-off events. For 70753/70753 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15485 event pairs, 385 based on Foata normal form. 1/2686 useless extension candidates. Maximal degree in co-relation 17423. Up to 2356 conditions per place. [2024-06-03 20:48:58,620 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 181 selfloop transitions, 19 changer transitions 0/207 dead transitions. [2024-06-03 20:48:58,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 207 transitions, 2675 flow [2024-06-03 20:48:58,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:48:58,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:48:58,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-03 20:48:58,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-03 20:48:58,622 INFO L175 Difference]: Start difference. First operand has 144 places, 198 transitions, 2253 flow. Second operand 5 states and 119 transitions. [2024-06-03 20:48:58,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 207 transitions, 2675 flow [2024-06-03 20:48:58,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 207 transitions, 2648 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-03 20:48:58,709 INFO L231 Difference]: Finished difference. Result has 147 places, 198 transitions, 2270 flow [2024-06-03 20:48:58,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2226, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2270, PETRI_PLACES=147, PETRI_TRANSITIONS=198} [2024-06-03 20:48:58,709 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-03 20:48:58,709 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 198 transitions, 2270 flow [2024-06-03 20:48:58,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:58,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:58,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:58,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:48:58,710 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:58,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:58,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1863986431, now seen corresponding path program 1 times [2024-06-03 20:48:58,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:58,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540557412] [2024-06-03 20:48:58,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:58,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:58,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:58,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540557412] [2024-06-03 20:48:58,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540557412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:58,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:58,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:58,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546183964] [2024-06-03 20:48:58,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:58,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:58,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:58,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:58,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:59,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:59,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 198 transitions, 2270 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:59,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:59,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:59,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:59,524 INFO L124 PetriNetUnfolderBase]: 1628/2754 cut-off events. [2024-06-03 20:48:59,524 INFO L125 PetriNetUnfolderBase]: For 78837/78837 co-relation queries the response was YES. [2024-06-03 20:48:59,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18261 conditions, 2754 events. 1628/2754 cut-off events. For 78837/78837 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 15865 event pairs, 262 based on Foata normal form. 4/2757 useless extension candidates. Maximal degree in co-relation 18194. Up to 2341 conditions per place. [2024-06-03 20:48:59,550 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 213 selfloop transitions, 19 changer transitions 0/239 dead transitions. [2024-06-03 20:48:59,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 239 transitions, 3050 flow [2024-06-03 20:48:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:59,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:59,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-03 20:48:59,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-03 20:48:59,552 INFO L175 Difference]: Start difference. First operand has 147 places, 198 transitions, 2270 flow. Second operand 8 states and 193 transitions. [2024-06-03 20:48:59,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 239 transitions, 3050 flow [2024-06-03 20:48:59,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 239 transitions, 2987 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:59,647 INFO L231 Difference]: Finished difference. Result has 150 places, 202 transitions, 2372 flow [2024-06-03 20:48:59,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2207, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2372, PETRI_PLACES=150, PETRI_TRANSITIONS=202} [2024-06-03 20:48:59,648 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-03 20:48:59,648 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 202 transitions, 2372 flow [2024-06-03 20:48:59,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:59,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:59,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:59,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:48:59,648 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:59,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:59,649 INFO L85 PathProgramCache]: Analyzing trace with hash -17340307, now seen corresponding path program 2 times [2024-06-03 20:48:59,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:59,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690082733] [2024-06-03 20:48:59,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:59,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:59,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:59,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690082733] [2024-06-03 20:48:59,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690082733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:59,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:59,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:59,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315549890] [2024-06-03 20:48:59,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:59,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:59,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:59,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:59,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:59,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:59,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 202 transitions, 2372 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:59,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:59,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:59,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:00,380 INFO L124 PetriNetUnfolderBase]: 1620/2742 cut-off events. [2024-06-03 20:49:00,380 INFO L125 PetriNetUnfolderBase]: For 82222/82222 co-relation queries the response was YES. [2024-06-03 20:49:00,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18322 conditions, 2742 events. 1620/2742 cut-off events. For 82222/82222 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15785 event pairs, 346 based on Foata normal form. 4/2745 useless extension candidates. Maximal degree in co-relation 18254. Up to 2388 conditions per place. [2024-06-03 20:49:00,402 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 210 selfloop transitions, 15 changer transitions 0/232 dead transitions. [2024-06-03 20:49:00,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 232 transitions, 2898 flow [2024-06-03 20:49:00,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:49:00,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:49:00,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-03 20:49:00,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-03 20:49:00,404 INFO L175 Difference]: Start difference. First operand has 150 places, 202 transitions, 2372 flow. Second operand 7 states and 169 transitions. [2024-06-03 20:49:00,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 232 transitions, 2898 flow [2024-06-03 20:49:00,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 232 transitions, 2776 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-03 20:49:00,525 INFO L231 Difference]: Finished difference. Result has 153 places, 202 transitions, 2287 flow [2024-06-03 20:49:00,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2250, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2287, PETRI_PLACES=153, PETRI_TRANSITIONS=202} [2024-06-03 20:49:00,525 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-03 20:49:00,526 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 202 transitions, 2287 flow [2024-06-03 20:49:00,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:00,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:00,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:00,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:49:00,526 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:00,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:00,527 INFO L85 PathProgramCache]: Analyzing trace with hash -2147193601, now seen corresponding path program 3 times [2024-06-03 20:49:00,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:00,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805575780] [2024-06-03 20:49:00,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:00,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:00,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:00,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805575780] [2024-06-03 20:49:00,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805575780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:00,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:00,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:00,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174001384] [2024-06-03 20:49:00,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:00,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:00,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:00,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:00,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:00,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:00,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 202 transitions, 2287 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:00,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:00,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:00,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:01,251 INFO L124 PetriNetUnfolderBase]: 1637/2770 cut-off events. [2024-06-03 20:49:01,252 INFO L125 PetriNetUnfolderBase]: For 87249/87251 co-relation queries the response was YES. [2024-06-03 20:49:01,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18453 conditions, 2770 events. 1637/2770 cut-off events. For 87249/87251 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16012 event pairs, 350 based on Foata normal form. 6/2775 useless extension candidates. Maximal degree in co-relation 18383. Up to 2370 conditions per place. [2024-06-03 20:49:01,281 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 197 selfloop transitions, 27 changer transitions 0/231 dead transitions. [2024-06-03 20:49:01,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 231 transitions, 2865 flow [2024-06-03 20:49:01,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:49:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:49:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:49:01,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-03 20:49:01,285 INFO L175 Difference]: Start difference. First operand has 153 places, 202 transitions, 2287 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:49:01,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 231 transitions, 2865 flow [2024-06-03 20:49:01,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 231 transitions, 2830 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:01,401 INFO L231 Difference]: Finished difference. Result has 154 places, 204 transitions, 2379 flow [2024-06-03 20:49:01,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2252, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2379, PETRI_PLACES=154, PETRI_TRANSITIONS=204} [2024-06-03 20:49:01,401 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-03 20:49:01,401 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 204 transitions, 2379 flow [2024-06-03 20:49:01,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:01,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:01,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:01,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:49:01,402 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:01,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:01,403 INFO L85 PathProgramCache]: Analyzing trace with hash -500131359, now seen corresponding path program 4 times [2024-06-03 20:49:01,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:01,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088709811] [2024-06-03 20:49:01,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:01,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:01,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:01,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088709811] [2024-06-03 20:49:01,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088709811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:01,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:01,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:01,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069987755] [2024-06-03 20:49:01,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:01,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:01,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:01,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:01,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:01,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:01,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 204 transitions, 2379 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:01,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:01,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:01,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:02,290 INFO L124 PetriNetUnfolderBase]: 1629/2757 cut-off events. [2024-06-03 20:49:02,290 INFO L125 PetriNetUnfolderBase]: For 90657/90657 co-relation queries the response was YES. [2024-06-03 20:49:02,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18501 conditions, 2757 events. 1629/2757 cut-off events. For 90657/90657 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15890 event pairs, 344 based on Foata normal form. 4/2760 useless extension candidates. Maximal degree in co-relation 18430. Up to 2358 conditions per place. [2024-06-03 20:49:02,311 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 206 selfloop transitions, 28 changer transitions 0/241 dead transitions. [2024-06-03 20:49:02,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 241 transitions, 3001 flow [2024-06-03 20:49:02,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:02,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:02,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-03 20:49:02,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-03 20:49:02,313 INFO L175 Difference]: Start difference. First operand has 154 places, 204 transitions, 2379 flow. Second operand 9 states and 210 transitions. [2024-06-03 20:49:02,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 241 transitions, 3001 flow [2024-06-03 20:49:02,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 241 transitions, 2892 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-03 20:49:02,405 INFO L231 Difference]: Finished difference. Result has 158 places, 206 transitions, 2403 flow [2024-06-03 20:49:02,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2270, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2403, PETRI_PLACES=158, PETRI_TRANSITIONS=206} [2024-06-03 20:49:02,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-03 20:49:02,406 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 206 transitions, 2403 flow [2024-06-03 20:49:02,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:02,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:02,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:02,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:49:02,406 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:02,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:02,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1101440646, now seen corresponding path program 1 times [2024-06-03 20:49:02,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:02,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113466465] [2024-06-03 20:49:02,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:02,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:02,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:02,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113466465] [2024-06-03 20:49:02,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113466465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:02,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:02,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:49:02,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341690825] [2024-06-03 20:49:02,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:02,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:49:02,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:02,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:49:02,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:49:02,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:02,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 206 transitions, 2403 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:02,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:02,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:02,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:03,084 INFO L124 PetriNetUnfolderBase]: 1661/2809 cut-off events. [2024-06-03 20:49:03,085 INFO L125 PetriNetUnfolderBase]: For 95926/95926 co-relation queries the response was YES. [2024-06-03 20:49:03,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18976 conditions, 2809 events. 1661/2809 cut-off events. For 95926/95926 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16217 event pairs, 327 based on Foata normal form. 4/2812 useless extension candidates. Maximal degree in co-relation 18904. Up to 2251 conditions per place. [2024-06-03 20:49:03,106 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 171 selfloop transitions, 66 changer transitions 0/244 dead transitions. [2024-06-03 20:49:03,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 244 transitions, 3244 flow [2024-06-03 20:49:03,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:03,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:03,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-03 20:49:03,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-03 20:49:03,107 INFO L175 Difference]: Start difference. First operand has 158 places, 206 transitions, 2403 flow. Second operand 9 states and 215 transitions. [2024-06-03 20:49:03,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 244 transitions, 3244 flow [2024-06-03 20:49:03,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 244 transitions, 3129 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-03 20:49:03,276 INFO L231 Difference]: Finished difference. Result has 161 places, 217 transitions, 2623 flow [2024-06-03 20:49:03,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2288, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2623, PETRI_PLACES=161, PETRI_TRANSITIONS=217} [2024-06-03 20:49:03,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-03 20:49:03,277 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 217 transitions, 2623 flow [2024-06-03 20:49:03,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:03,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:03,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:03,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:49:03,278 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:03,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:03,278 INFO L85 PathProgramCache]: Analyzing trace with hash 223022146, now seen corresponding path program 2 times [2024-06-03 20:49:03,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:03,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835612658] [2024-06-03 20:49:03,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:03,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:03,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:03,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835612658] [2024-06-03 20:49:03,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835612658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:03,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:03,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:49:03,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850734916] [2024-06-03 20:49:03,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:03,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:49:03,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:03,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:49:03,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:49:03,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:03,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 217 transitions, 2623 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:03,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:03,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:03,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:03,884 INFO L124 PetriNetUnfolderBase]: 1671/2826 cut-off events. [2024-06-03 20:49:03,884 INFO L125 PetriNetUnfolderBase]: For 98786/98786 co-relation queries the response was YES. [2024-06-03 20:49:03,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19366 conditions, 2826 events. 1671/2826 cut-off events. For 98786/98786 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16348 event pairs, 336 based on Foata normal form. 2/2826 useless extension candidates. Maximal degree in co-relation 19292. Up to 2257 conditions per place. [2024-06-03 20:49:03,906 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 158 selfloop transitions, 77 changer transitions 0/242 dead transitions. [2024-06-03 20:49:03,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 242 transitions, 3425 flow [2024-06-03 20:49:03,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:03,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:03,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-03 20:49:03,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-03 20:49:03,909 INFO L175 Difference]: Start difference. First operand has 161 places, 217 transitions, 2623 flow. Second operand 8 states and 194 transitions. [2024-06-03 20:49:03,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 242 transitions, 3425 flow [2024-06-03 20:49:04,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 242 transitions, 3328 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 20:49:04,007 INFO L231 Difference]: Finished difference. Result has 164 places, 221 transitions, 2759 flow [2024-06-03 20:49:04,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2528, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2759, PETRI_PLACES=164, PETRI_TRANSITIONS=221} [2024-06-03 20:49:04,007 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-03 20:49:04,007 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 221 transitions, 2759 flow [2024-06-03 20:49:04,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:04,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:04,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:04,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:49:04,008 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:04,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:04,008 INFO L85 PathProgramCache]: Analyzing trace with hash 517847732, now seen corresponding path program 3 times [2024-06-03 20:49:04,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:04,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339222900] [2024-06-03 20:49:04,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:04,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:04,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:04,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339222900] [2024-06-03 20:49:04,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339222900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:04,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:04,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:49:04,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388409499] [2024-06-03 20:49:04,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:04,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:49:04,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:04,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:49:04,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:49:04,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:04,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 221 transitions, 2759 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:04,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:04,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:04,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:04,801 INFO L124 PetriNetUnfolderBase]: 1667/2822 cut-off events. [2024-06-03 20:49:04,801 INFO L125 PetriNetUnfolderBase]: For 102828/102828 co-relation queries the response was YES. [2024-06-03 20:49:04,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19448 conditions, 2822 events. 1667/2822 cut-off events. For 102828/102828 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16330 event pairs, 336 based on Foata normal form. 2/2822 useless extension candidates. Maximal degree in co-relation 19373. Up to 2256 conditions per place. [2024-06-03 20:49:04,832 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 163 selfloop transitions, 73 changer transitions 0/243 dead transitions. [2024-06-03 20:49:04,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 243 transitions, 3499 flow [2024-06-03 20:49:04,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:04,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:04,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-03 20:49:04,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608465608465608 [2024-06-03 20:49:04,833 INFO L175 Difference]: Start difference. First operand has 164 places, 221 transitions, 2759 flow. Second operand 9 states and 212 transitions. [2024-06-03 20:49:04,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 243 transitions, 3499 flow [2024-06-03 20:49:04,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 243 transitions, 3321 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:04,976 INFO L231 Difference]: Finished difference. Result has 167 places, 221 transitions, 2736 flow [2024-06-03 20:49:04,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2581, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2736, PETRI_PLACES=167, PETRI_TRANSITIONS=221} [2024-06-03 20:49:04,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-03 20:49:04,978 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 221 transitions, 2736 flow [2024-06-03 20:49:04,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:04,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:04,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:04,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:49:04,978 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:04,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:04,979 INFO L85 PathProgramCache]: Analyzing trace with hash -441904046, now seen corresponding path program 1 times [2024-06-03 20:49:04,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:04,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163232782] [2024-06-03 20:49:04,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:04,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:05,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:05,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163232782] [2024-06-03 20:49:05,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163232782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:05,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:05,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:49:05,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026519900] [2024-06-03 20:49:05,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:05,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:49:05,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:05,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:49:05,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:49:05,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:49:05,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 221 transitions, 2736 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:05,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:05,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:49:05,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:05,693 INFO L124 PetriNetUnfolderBase]: 1564/2734 cut-off events. [2024-06-03 20:49:05,693 INFO L125 PetriNetUnfolderBase]: For 110548/110572 co-relation queries the response was YES. [2024-06-03 20:49:05,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18508 conditions, 2734 events. 1564/2734 cut-off events. For 110548/110572 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 16340 event pairs, 337 based on Foata normal form. 12/2736 useless extension candidates. Maximal degree in co-relation 18434. Up to 2107 conditions per place. [2024-06-03 20:49:05,715 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 184 selfloop transitions, 32 changer transitions 0/245 dead transitions. [2024-06-03 20:49:05,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 245 transitions, 3262 flow [2024-06-03 20:49:05,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:05,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-03 20:49:05,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-03 20:49:05,721 INFO L175 Difference]: Start difference. First operand has 167 places, 221 transitions, 2736 flow. Second operand 8 states and 186 transitions. [2024-06-03 20:49:05,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 245 transitions, 3262 flow [2024-06-03 20:49:05,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 245 transitions, 3061 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 20:49:05,838 INFO L231 Difference]: Finished difference. Result has 167 places, 223 transitions, 2636 flow [2024-06-03 20:49:05,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2535, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2636, PETRI_PLACES=167, PETRI_TRANSITIONS=223} [2024-06-03 20:49:05,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-03 20:49:05,839 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 223 transitions, 2636 flow [2024-06-03 20:49:05,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:05,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:05,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:05,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:49:05,840 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:05,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:05,840 INFO L85 PathProgramCache]: Analyzing trace with hash -541209634, now seen corresponding path program 1 times [2024-06-03 20:49:05,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:05,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95951712] [2024-06-03 20:49:05,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:05,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:06,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:06,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95951712] [2024-06-03 20:49:06,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95951712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:06,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:06,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:06,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861191906] [2024-06-03 20:49:06,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:06,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:06,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:06,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:06,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:06,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:06,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 223 transitions, 2636 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:06,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:06,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:06,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:06,886 INFO L124 PetriNetUnfolderBase]: 2312/3887 cut-off events. [2024-06-03 20:49:06,886 INFO L125 PetriNetUnfolderBase]: For 199748/199748 co-relation queries the response was YES. [2024-06-03 20:49:06,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27656 conditions, 3887 events. 2312/3887 cut-off events. For 199748/199748 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 23749 event pairs, 404 based on Foata normal form. 42/3926 useless extension candidates. Maximal degree in co-relation 27582. Up to 2361 conditions per place. [2024-06-03 20:49:06,929 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 238 selfloop transitions, 46 changer transitions 0/291 dead transitions. [2024-06-03 20:49:06,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 291 transitions, 3902 flow [2024-06-03 20:49:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:49:06,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:49:06,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-06-03 20:49:06,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-03 20:49:06,930 INFO L175 Difference]: Start difference. First operand has 167 places, 223 transitions, 2636 flow. Second operand 10 states and 261 transitions. [2024-06-03 20:49:06,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 291 transitions, 3902 flow [2024-06-03 20:49:07,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 291 transitions, 3825 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:07,167 INFO L231 Difference]: Finished difference. Result has 173 places, 229 transitions, 2825 flow [2024-06-03 20:49:07,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2559, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2825, PETRI_PLACES=173, PETRI_TRANSITIONS=229} [2024-06-03 20:49:07,168 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-03 20:49:07,168 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 229 transitions, 2825 flow [2024-06-03 20:49:07,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:07,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:07,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:07,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:49:07,169 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:07,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:07,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1950879756, now seen corresponding path program 2 times [2024-06-03 20:49:07,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:07,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163244076] [2024-06-03 20:49:07,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:07,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:07,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:07,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163244076] [2024-06-03 20:49:07,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163244076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:07,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:07,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:07,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681661086] [2024-06-03 20:49:07,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:07,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:07,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:07,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:07,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:07,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:07,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 229 transitions, 2825 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:07,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:07,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:07,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:08,124 INFO L124 PetriNetUnfolderBase]: 2470/4213 cut-off events. [2024-06-03 20:49:08,124 INFO L125 PetriNetUnfolderBase]: For 215894/215894 co-relation queries the response was YES. [2024-06-03 20:49:08,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29694 conditions, 4213 events. 2470/4213 cut-off events. For 215894/215894 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 26539 event pairs, 619 based on Foata normal form. 42/4252 useless extension candidates. Maximal degree in co-relation 29617. Up to 2917 conditions per place. [2024-06-03 20:49:08,161 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 233 selfloop transitions, 43 changer transitions 0/283 dead transitions. [2024-06-03 20:49:08,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 283 transitions, 3915 flow [2024-06-03 20:49:08,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:08,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:08,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-03 20:49:08,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137566137566137 [2024-06-03 20:49:08,162 INFO L175 Difference]: Start difference. First operand has 173 places, 229 transitions, 2825 flow. Second operand 9 states and 232 transitions. [2024-06-03 20:49:08,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 283 transitions, 3915 flow [2024-06-03 20:49:08,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 283 transitions, 3804 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-03 20:49:08,459 INFO L231 Difference]: Finished difference. Result has 178 places, 233 transitions, 2941 flow [2024-06-03 20:49:08,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2714, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2941, PETRI_PLACES=178, PETRI_TRANSITIONS=233} [2024-06-03 20:49:08,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-03 20:49:08,459 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 233 transitions, 2941 flow [2024-06-03 20:49:08,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:08,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:08,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:08,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:49:08,460 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:08,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:08,461 INFO L85 PathProgramCache]: Analyzing trace with hash 2037719436, now seen corresponding path program 3 times [2024-06-03 20:49:08,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:08,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078521408] [2024-06-03 20:49:08,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:08,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:08,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:08,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078521408] [2024-06-03 20:49:08,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078521408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:08,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:08,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:08,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268267346] [2024-06-03 20:49:08,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:08,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:08,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:08,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:08,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:08,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:08,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 233 transitions, 2941 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:08,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:08,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:08,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:09,372 INFO L124 PetriNetUnfolderBase]: 2454/4209 cut-off events. [2024-06-03 20:49:09,372 INFO L125 PetriNetUnfolderBase]: For 205189/205189 co-relation queries the response was YES. [2024-06-03 20:49:09,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28320 conditions, 4209 events. 2454/4209 cut-off events. For 205189/205189 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 26738 event pairs, 691 based on Foata normal form. 50/4258 useless extension candidates. Maximal degree in co-relation 28240. Up to 3393 conditions per place. [2024-06-03 20:49:09,409 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 226 selfloop transitions, 43 changer transitions 0/276 dead transitions. [2024-06-03 20:49:09,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 276 transitions, 3755 flow [2024-06-03 20:49:09,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:09,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:09,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-03 20:49:09,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978835978835979 [2024-06-03 20:49:09,410 INFO L175 Difference]: Start difference. First operand has 178 places, 233 transitions, 2941 flow. Second operand 9 states and 226 transitions. [2024-06-03 20:49:09,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 276 transitions, 3755 flow [2024-06-03 20:49:09,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 276 transitions, 3644 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-03 20:49:09,655 INFO L231 Difference]: Finished difference. Result has 182 places, 235 transitions, 3003 flow [2024-06-03 20:49:09,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2830, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3003, PETRI_PLACES=182, PETRI_TRANSITIONS=235} [2024-06-03 20:49:09,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-03 20:49:09,656 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 235 transitions, 3003 flow [2024-06-03 20:49:09,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:09,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:09,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:09,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:49:09,656 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:09,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:09,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1939041238, now seen corresponding path program 4 times [2024-06-03 20:49:09,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:09,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904879243] [2024-06-03 20:49:09,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:09,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:09,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:09,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904879243] [2024-06-03 20:49:09,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904879243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:09,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:09,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:09,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630159397] [2024-06-03 20:49:09,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:09,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:09,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:09,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:09,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:09,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:09,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 235 transitions, 3003 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:09,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:09,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:09,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:10,653 INFO L124 PetriNetUnfolderBase]: 2651/4555 cut-off events. [2024-06-03 20:49:10,654 INFO L125 PetriNetUnfolderBase]: For 215451/215451 co-relation queries the response was YES. [2024-06-03 20:49:10,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29981 conditions, 4555 events. 2651/4555 cut-off events. For 215451/215451 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 29556 event pairs, 748 based on Foata normal form. 50/4603 useless extension candidates. Maximal degree in co-relation 29899. Up to 3289 conditions per place. [2024-06-03 20:49:10,693 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 151 selfloop transitions, 119 changer transitions 0/277 dead transitions. [2024-06-03 20:49:10,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 277 transitions, 3979 flow [2024-06-03 20:49:10,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:10,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:10,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-03 20:49:10,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-03 20:49:10,694 INFO L175 Difference]: Start difference. First operand has 182 places, 235 transitions, 3003 flow. Second operand 9 states and 234 transitions. [2024-06-03 20:49:10,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 277 transitions, 3979 flow [2024-06-03 20:49:10,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 277 transitions, 3846 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-03 20:49:10,947 INFO L231 Difference]: Finished difference. Result has 184 places, 237 transitions, 3193 flow [2024-06-03 20:49:10,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2870, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3193, PETRI_PLACES=184, PETRI_TRANSITIONS=237} [2024-06-03 20:49:10,948 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-03 20:49:10,948 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 237 transitions, 3193 flow [2024-06-03 20:49:10,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:10,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:10,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:10,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:49:10,949 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:10,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:10,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1316778410, now seen corresponding path program 5 times [2024-06-03 20:49:10,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:10,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172560138] [2024-06-03 20:49:10,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:10,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:11,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:11,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:11,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172560138] [2024-06-03 20:49:11,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172560138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:11,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:11,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:11,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597257261] [2024-06-03 20:49:11,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:11,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:11,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:11,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:11,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:11,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:11,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 237 transitions, 3193 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:11,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:11,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:11,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:11,994 INFO L124 PetriNetUnfolderBase]: 2848/4905 cut-off events. [2024-06-03 20:49:11,995 INFO L125 PetriNetUnfolderBase]: For 229372/229372 co-relation queries the response was YES. [2024-06-03 20:49:12,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31996 conditions, 4905 events. 2848/4905 cut-off events. For 229372/229372 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 32282 event pairs, 834 based on Foata normal form. 50/4953 useless extension candidates. Maximal degree in co-relation 31913. Up to 3628 conditions per place. [2024-06-03 20:49:12,032 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 159 selfloop transitions, 114 changer transitions 0/280 dead transitions. [2024-06-03 20:49:12,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 280 transitions, 4271 flow [2024-06-03 20:49:12,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:12,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:12,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-03 20:49:12,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216931216931217 [2024-06-03 20:49:12,034 INFO L175 Difference]: Start difference. First operand has 184 places, 237 transitions, 3193 flow. Second operand 9 states and 235 transitions. [2024-06-03 20:49:12,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 280 transitions, 4271 flow [2024-06-03 20:49:12,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 280 transitions, 3980 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-03 20:49:12,308 INFO L231 Difference]: Finished difference. Result has 186 places, 239 transitions, 3219 flow [2024-06-03 20:49:12,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2902, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3219, PETRI_PLACES=186, PETRI_TRANSITIONS=239} [2024-06-03 20:49:12,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-03 20:49:12,309 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 239 transitions, 3219 flow [2024-06-03 20:49:12,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:12,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:12,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:12,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:49:12,309 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:12,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:12,309 INFO L85 PathProgramCache]: Analyzing trace with hash 721408908, now seen corresponding path program 6 times [2024-06-03 20:49:12,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:12,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605362671] [2024-06-03 20:49:12,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:12,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:12,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:12,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605362671] [2024-06-03 20:49:12,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605362671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:12,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:12,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:12,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836686105] [2024-06-03 20:49:12,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:12,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:12,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:12,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:12,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:12,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:12,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 239 transitions, 3219 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:12,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:12,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:12,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:13,462 INFO L124 PetriNetUnfolderBase]: 3111/5372 cut-off events. [2024-06-03 20:49:13,462 INFO L125 PetriNetUnfolderBase]: For 245338/245338 co-relation queries the response was YES. [2024-06-03 20:49:13,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35059 conditions, 5372 events. 3111/5372 cut-off events. For 245338/245338 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 36167 event pairs, 870 based on Foata normal form. 42/5412 useless extension candidates. Maximal degree in co-relation 34975. Up to 3273 conditions per place. [2024-06-03 20:49:13,505 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 168 selfloop transitions, 116 changer transitions 0/291 dead transitions. [2024-06-03 20:49:13,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 291 transitions, 4505 flow [2024-06-03 20:49:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:13,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:13,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-03 20:49:13,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-03 20:49:13,507 INFO L175 Difference]: Start difference. First operand has 186 places, 239 transitions, 3219 flow. Second operand 9 states and 240 transitions. [2024-06-03 20:49:13,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 291 transitions, 4505 flow [2024-06-03 20:49:13,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 291 transitions, 4222 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-03 20:49:13,804 INFO L231 Difference]: Finished difference. Result has 189 places, 243 transitions, 3330 flow [2024-06-03 20:49:13,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2936, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3330, PETRI_PLACES=189, PETRI_TRANSITIONS=243} [2024-06-03 20:49:13,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-03 20:49:13,805 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 243 transitions, 3330 flow [2024-06-03 20:49:13,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:13,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:13,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:13,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:49:13,805 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:13,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:13,805 INFO L85 PathProgramCache]: Analyzing trace with hash 666333982, now seen corresponding path program 1 times [2024-06-03 20:49:13,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:13,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145614269] [2024-06-03 20:49:13,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:13,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:14,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:14,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145614269] [2024-06-03 20:49:14,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145614269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:14,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:14,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:14,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725457276] [2024-06-03 20:49:14,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:14,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:14,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:14,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:14,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:14,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:14,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 243 transitions, 3330 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:14,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:14,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:14,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:14,905 INFO L124 PetriNetUnfolderBase]: 3269/5686 cut-off events. [2024-06-03 20:49:14,906 INFO L125 PetriNetUnfolderBase]: For 267903/267903 co-relation queries the response was YES. [2024-06-03 20:49:14,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36562 conditions, 5686 events. 3269/5686 cut-off events. For 267903/267903 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 39219 event pairs, 924 based on Foata normal form. 42/5723 useless extension candidates. Maximal degree in co-relation 36476. Up to 3337 conditions per place. [2024-06-03 20:49:14,956 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 157 selfloop transitions, 127 changer transitions 0/291 dead transitions. [2024-06-03 20:49:14,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 291 transitions, 4398 flow [2024-06-03 20:49:14,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:14,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-03 20:49:14,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-03 20:49:14,958 INFO L175 Difference]: Start difference. First operand has 189 places, 243 transitions, 3330 flow. Second operand 9 states and 238 transitions. [2024-06-03 20:49:14,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 291 transitions, 4398 flow [2024-06-03 20:49:15,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 291 transitions, 4162 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-03 20:49:15,325 INFO L231 Difference]: Finished difference. Result has 193 places, 245 transitions, 3443 flow [2024-06-03 20:49:15,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3094, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3443, PETRI_PLACES=193, PETRI_TRANSITIONS=245} [2024-06-03 20:49:15,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-03 20:49:15,326 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 245 transitions, 3443 flow [2024-06-03 20:49:15,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:15,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:15,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:15,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:49:15,327 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:15,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:15,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1228136626, now seen corresponding path program 1 times [2024-06-03 20:49:15,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:15,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204621883] [2024-06-03 20:49:15,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:15,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:15,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:15,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204621883] [2024-06-03 20:49:15,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204621883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:15,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:15,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:49:15,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130329508] [2024-06-03 20:49:15,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:15,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:49:15,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:15,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:49:15,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:49:15,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:15,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 245 transitions, 3443 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:15,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:15,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:15,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:16,302 INFO L124 PetriNetUnfolderBase]: 3263/5654 cut-off events. [2024-06-03 20:49:16,302 INFO L125 PetriNetUnfolderBase]: For 226628/226628 co-relation queries the response was YES. [2024-06-03 20:49:16,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36582 conditions, 5654 events. 3263/5654 cut-off events. For 226628/226628 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 38679 event pairs, 1070 based on Foata normal form. 2/5654 useless extension candidates. Maximal degree in co-relation 36494. Up to 4959 conditions per place. [2024-06-03 20:49:16,359 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 193 selfloop transitions, 68 changer transitions 0/268 dead transitions. [2024-06-03 20:49:16,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 268 transitions, 4291 flow [2024-06-03 20:49:16,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:49:16,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:49:16,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 20:49:16,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-03 20:49:16,361 INFO L175 Difference]: Start difference. First operand has 193 places, 245 transitions, 3443 flow. Second operand 7 states and 176 transitions. [2024-06-03 20:49:16,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 268 transitions, 4291 flow [2024-06-03 20:49:16,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 268 transitions, 3972 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-03 20:49:16,780 INFO L231 Difference]: Finished difference. Result has 193 places, 245 transitions, 3268 flow [2024-06-03 20:49:16,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3124, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3268, PETRI_PLACES=193, PETRI_TRANSITIONS=245} [2024-06-03 20:49:16,781 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-03 20:49:16,781 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 245 transitions, 3268 flow [2024-06-03 20:49:16,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:16,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:16,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:16,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:49:16,781 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:16,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:16,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1961919640, now seen corresponding path program 2 times [2024-06-03 20:49:16,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:16,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750495350] [2024-06-03 20:49:16,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:16,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:16,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:16,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750495350] [2024-06-03 20:49:16,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750495350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:16,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:16,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:49:16,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779049562] [2024-06-03 20:49:16,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:16,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:49:16,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:16,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:49:16,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:49:17,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:17,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 245 transitions, 3268 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:17,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:17,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:17,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:17,698 INFO L124 PetriNetUnfolderBase]: 3284/5697 cut-off events. [2024-06-03 20:49:17,698 INFO L125 PetriNetUnfolderBase]: For 233416/233416 co-relation queries the response was YES. [2024-06-03 20:49:17,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36279 conditions, 5697 events. 3284/5697 cut-off events. For 233416/233416 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 39098 event pairs, 1075 based on Foata normal form. 1/5696 useless extension candidates. Maximal degree in co-relation 36190. Up to 4970 conditions per place. [2024-06-03 20:49:17,749 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 188 selfloop transitions, 78 changer transitions 0/273 dead transitions. [2024-06-03 20:49:17,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 273 transitions, 4254 flow [2024-06-03 20:49:17,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:49:17,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:49:17,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:49:17,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-03 20:49:17,750 INFO L175 Difference]: Start difference. First operand has 193 places, 245 transitions, 3268 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:49:17,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 273 transitions, 4254 flow [2024-06-03 20:49:18,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 273 transitions, 4126 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-03 20:49:18,129 INFO L231 Difference]: Finished difference. Result has 197 places, 253 transitions, 3453 flow [2024-06-03 20:49:18,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3150, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3453, PETRI_PLACES=197, PETRI_TRANSITIONS=253} [2024-06-03 20:49:18,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-03 20:49:18,130 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 253 transitions, 3453 flow [2024-06-03 20:49:18,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:18,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:18,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:18,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:49:18,131 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:18,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:18,131 INFO L85 PathProgramCache]: Analyzing trace with hash -735865050, now seen corresponding path program 7 times [2024-06-03 20:49:18,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:18,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304501103] [2024-06-03 20:49:18,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:18,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:18,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:18,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304501103] [2024-06-03 20:49:18,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304501103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:18,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:18,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:18,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857353371] [2024-06-03 20:49:18,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:18,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:18,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:18,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:18,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:18,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:18,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 253 transitions, 3453 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:18,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:18,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:18,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:19,321 INFO L124 PetriNetUnfolderBase]: 3471/6017 cut-off events. [2024-06-03 20:49:19,322 INFO L125 PetriNetUnfolderBase]: For 302208/302208 co-relation queries the response was YES. [2024-06-03 20:49:19,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38248 conditions, 6017 events. 3471/6017 cut-off events. For 302208/302208 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 41821 event pairs, 1117 based on Foata normal form. 50/6066 useless extension candidates. Maximal degree in co-relation 38157. Up to 4678 conditions per place. [2024-06-03 20:49:19,377 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 176 selfloop transitions, 122 changer transitions 0/305 dead transitions. [2024-06-03 20:49:19,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 305 transitions, 4469 flow [2024-06-03 20:49:19,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:49:19,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:49:19,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 278 transitions. [2024-06-03 20:49:19,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6017316017316018 [2024-06-03 20:49:19,378 INFO L175 Difference]: Start difference. First operand has 197 places, 253 transitions, 3453 flow. Second operand 11 states and 278 transitions. [2024-06-03 20:49:19,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 305 transitions, 4469 flow [2024-06-03 20:49:19,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 305 transitions, 4380 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-03 20:49:19,791 INFO L231 Difference]: Finished difference. Result has 205 places, 255 transitions, 3709 flow [2024-06-03 20:49:19,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3364, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3709, PETRI_PLACES=205, PETRI_TRANSITIONS=255} [2024-06-03 20:49:19,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-03 20:49:19,792 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 255 transitions, 3709 flow [2024-06-03 20:49:19,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:19,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:19,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:19,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:49:19,792 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:19,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:19,793 INFO L85 PathProgramCache]: Analyzing trace with hash -19276758, now seen corresponding path program 8 times [2024-06-03 20:49:19,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:19,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969806562] [2024-06-03 20:49:19,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:19,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:20,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:20,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969806562] [2024-06-03 20:49:20,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969806562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:20,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:20,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:20,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028636820] [2024-06-03 20:49:20,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:20,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:20,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:20,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:20,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:20,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:20,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 255 transitions, 3709 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:20,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:20,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:20,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:21,057 INFO L124 PetriNetUnfolderBase]: 3668/6356 cut-off events. [2024-06-03 20:49:21,057 INFO L125 PetriNetUnfolderBase]: For 324951/324951 co-relation queries the response was YES. [2024-06-03 20:49:21,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40787 conditions, 6356 events. 3668/6356 cut-off events. For 324951/324951 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 44691 event pairs, 1190 based on Foata normal form. 50/6405 useless extension candidates. Maximal degree in co-relation 40695. Up to 5005 conditions per place. [2024-06-03 20:49:21,110 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 186 selfloop transitions, 110 changer transitions 0/303 dead transitions. [2024-06-03 20:49:21,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 303 transitions, 4719 flow [2024-06-03 20:49:21,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:49:21,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:49:21,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-06-03 20:49:21,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.611904761904762 [2024-06-03 20:49:21,111 INFO L175 Difference]: Start difference. First operand has 205 places, 255 transitions, 3709 flow. Second operand 10 states and 257 transitions. [2024-06-03 20:49:21,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 303 transitions, 4719 flow [2024-06-03 20:49:21,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 303 transitions, 4408 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-03 20:49:21,697 INFO L231 Difference]: Finished difference. Result has 206 places, 257 transitions, 3723 flow [2024-06-03 20:49:21,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3723, PETRI_PLACES=206, PETRI_TRANSITIONS=257} [2024-06-03 20:49:21,697 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-03 20:49:21,697 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 257 transitions, 3723 flow [2024-06-03 20:49:21,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:21,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:21,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:21,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:49:21,698 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:21,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:21,698 INFO L85 PathProgramCache]: Analyzing trace with hash -218578548, now seen corresponding path program 9 times [2024-06-03 20:49:21,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:21,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62968996] [2024-06-03 20:49:21,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:21,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:21,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:21,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62968996] [2024-06-03 20:49:21,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62968996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:21,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:21,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:21,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50922217] [2024-06-03 20:49:21,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:21,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:21,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:21,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:21,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:21,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:21,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 257 transitions, 3723 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:21,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:21,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:21,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:22,851 INFO L124 PetriNetUnfolderBase]: 3865/6707 cut-off events. [2024-06-03 20:49:22,852 INFO L125 PetriNetUnfolderBase]: For 343360/343360 co-relation queries the response was YES. [2024-06-03 20:49:22,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42462 conditions, 6707 events. 3865/6707 cut-off events. For 343360/343360 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 47703 event pairs, 1263 based on Foata normal form. 50/6756 useless extension candidates. Maximal degree in co-relation 42369. Up to 5344 conditions per place. [2024-06-03 20:49:22,913 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 190 selfloop transitions, 109 changer transitions 0/306 dead transitions. [2024-06-03 20:49:22,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 306 transitions, 4847 flow [2024-06-03 20:49:22,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:49:22,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:49:22,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-06-03 20:49:22,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.611904761904762 [2024-06-03 20:49:22,915 INFO L175 Difference]: Start difference. First operand has 206 places, 257 transitions, 3723 flow. Second operand 10 states and 257 transitions. [2024-06-03 20:49:22,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 306 transitions, 4847 flow [2024-06-03 20:49:23,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 306 transitions, 4556 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-03 20:49:23,764 INFO L231 Difference]: Finished difference. Result has 208 places, 259 transitions, 3759 flow [2024-06-03 20:49:23,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3432, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3759, PETRI_PLACES=208, PETRI_TRANSITIONS=259} [2024-06-03 20:49:23,765 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-03 20:49:23,765 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 259 transitions, 3759 flow [2024-06-03 20:49:23,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:23,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:23,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:23,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:49:23,766 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:23,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:23,766 INFO L85 PathProgramCache]: Analyzing trace with hash -480875516, now seen corresponding path program 10 times [2024-06-03 20:49:23,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:23,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231135099] [2024-06-03 20:49:23,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:23,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:23,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:23,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231135099] [2024-06-03 20:49:23,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231135099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:23,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:23,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:23,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048776486] [2024-06-03 20:49:23,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:23,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:23,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:23,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:23,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:24,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:24,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 259 transitions, 3759 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:24,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:24,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:24,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:25,155 INFO L124 PetriNetUnfolderBase]: 4204/7302 cut-off events. [2024-06-03 20:49:25,156 INFO L125 PetriNetUnfolderBase]: For 393141/393141 co-relation queries the response was YES. [2024-06-03 20:49:25,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46770 conditions, 7302 events. 4204/7302 cut-off events. For 393141/393141 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 52982 event pairs, 1337 based on Foata normal form. 42/7343 useless extension candidates. Maximal degree in co-relation 46676. Up to 4575 conditions per place. [2024-06-03 20:49:25,247 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 198 selfloop transitions, 112 changer transitions 0/317 dead transitions. [2024-06-03 20:49:25,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 317 transitions, 5115 flow [2024-06-03 20:49:25,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:49:25,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:49:25,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-06-03 20:49:25,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6238095238095238 [2024-06-03 20:49:25,249 INFO L175 Difference]: Start difference. First operand has 208 places, 259 transitions, 3759 flow. Second operand 10 states and 262 transitions. [2024-06-03 20:49:25,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 317 transitions, 5115 flow [2024-06-03 20:49:26,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 317 transitions, 4822 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-03 20:49:26,113 INFO L231 Difference]: Finished difference. Result has 211 places, 263 transitions, 3888 flow [2024-06-03 20:49:26,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3466, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3888, PETRI_PLACES=211, PETRI_TRANSITIONS=263} [2024-06-03 20:49:26,114 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-03 20:49:26,114 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 263 transitions, 3888 flow [2024-06-03 20:49:26,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:26,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:26,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:26,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:49:26,120 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:26,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:26,120 INFO L85 PathProgramCache]: Analyzing trace with hash -273801344, now seen corresponding path program 2 times [2024-06-03 20:49:26,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:26,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121993551] [2024-06-03 20:49:26,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:26,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:26,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:26,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121993551] [2024-06-03 20:49:26,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121993551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:26,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:26,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:26,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058295945] [2024-06-03 20:49:26,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:26,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:26,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:26,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:26,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:26,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:26,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 263 transitions, 3888 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:26,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:26,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:26,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:27,897 INFO L124 PetriNetUnfolderBase]: 4362/7618 cut-off events. [2024-06-03 20:49:27,898 INFO L125 PetriNetUnfolderBase]: For 408888/408888 co-relation queries the response was YES. [2024-06-03 20:49:27,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48269 conditions, 7618 events. 4362/7618 cut-off events. For 408888/408888 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 56108 event pairs, 1435 based on Foata normal form. 42/7659 useless extension candidates. Maximal degree in co-relation 48173. Up to 5505 conditions per place. [2024-06-03 20:49:28,003 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 194 selfloop transitions, 116 changer transitions 0/317 dead transitions. [2024-06-03 20:49:28,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 317 transitions, 4984 flow [2024-06-03 20:49:28,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:49:28,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:49:28,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-06-03 20:49:28,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-03 20:49:28,006 INFO L175 Difference]: Start difference. First operand has 211 places, 263 transitions, 3888 flow. Second operand 10 states and 261 transitions. [2024-06-03 20:49:28,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 317 transitions, 4984 flow [2024-06-03 20:49:28,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 317 transitions, 4735 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:28,737 INFO L231 Difference]: Finished difference. Result has 215 places, 265 transitions, 3986 flow [2024-06-03 20:49:28,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3639, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3986, PETRI_PLACES=215, PETRI_TRANSITIONS=265} [2024-06-03 20:49:28,737 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-03 20:49:28,738 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 265 transitions, 3986 flow [2024-06-03 20:49:28,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:28,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:28,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:28,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:49:28,738 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:28,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:28,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1410052894, now seen corresponding path program 3 times [2024-06-03 20:49:28,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:28,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028039524] [2024-06-03 20:49:28,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:28,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:29,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:29,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028039524] [2024-06-03 20:49:29,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028039524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:29,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:29,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:29,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134804369] [2024-06-03 20:49:29,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:29,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:29,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:29,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:29,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:29,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:29,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 265 transitions, 3986 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:29,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:29,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:29,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:30,363 INFO L124 PetriNetUnfolderBase]: 4513/7906 cut-off events. [2024-06-03 20:49:30,363 INFO L125 PetriNetUnfolderBase]: For 421789/421789 co-relation queries the response was YES. [2024-06-03 20:49:30,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49680 conditions, 7906 events. 4513/7906 cut-off events. For 421789/421789 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 58834 event pairs, 1518 based on Foata normal form. 42/7947 useless extension candidates. Maximal degree in co-relation 49582. Up to 6117 conditions per place. [2024-06-03 20:49:30,425 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 190 selfloop transitions, 126 changer transitions 0/323 dead transitions. [2024-06-03 20:49:30,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 323 transitions, 5112 flow [2024-06-03 20:49:30,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:49:30,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:49:30,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 283 transitions. [2024-06-03 20:49:30,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125541125541125 [2024-06-03 20:49:30,427 INFO L175 Difference]: Start difference. First operand has 215 places, 265 transitions, 3986 flow. Second operand 11 states and 283 transitions. [2024-06-03 20:49:30,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 323 transitions, 5112 flow [2024-06-03 20:49:31,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 323 transitions, 4795 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-03 20:49:31,202 INFO L231 Difference]: Finished difference. Result has 218 places, 267 transitions, 4040 flow [2024-06-03 20:49:31,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3669, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4040, PETRI_PLACES=218, PETRI_TRANSITIONS=267} [2024-06-03 20:49:31,202 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-03 20:49:31,202 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 267 transitions, 4040 flow [2024-06-03 20:49:31,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:31,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:31,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:31,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:49:31,203 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:31,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:31,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1971913502, now seen corresponding path program 4 times [2024-06-03 20:49:31,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:31,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820617444] [2024-06-03 20:49:31,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:31,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:31,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:31,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820617444] [2024-06-03 20:49:31,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820617444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:31,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:31,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:31,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274883363] [2024-06-03 20:49:31,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:31,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:31,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:31,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:31,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:31,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:31,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 267 transitions, 4040 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:31,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:31,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:31,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:32,648 INFO L124 PetriNetUnfolderBase]: 4730/8310 cut-off events. [2024-06-03 20:49:32,648 INFO L125 PetriNetUnfolderBase]: For 458183/458183 co-relation queries the response was YES. [2024-06-03 20:49:32,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51490 conditions, 8310 events. 4730/8310 cut-off events. For 458183/458183 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 62366 event pairs, 1520 based on Foata normal form. 42/8351 useless extension candidates. Maximal degree in co-relation 51391. Up to 3581 conditions per place. [2024-06-03 20:49:32,737 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 185 selfloop transitions, 136 changer transitions 0/328 dead transitions. [2024-06-03 20:49:32,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 328 transitions, 5156 flow [2024-06-03 20:49:32,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:49:32,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:49:32,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 285 transitions. [2024-06-03 20:49:32,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168831168831169 [2024-06-03 20:49:32,738 INFO L175 Difference]: Start difference. First operand has 218 places, 267 transitions, 4040 flow. Second operand 11 states and 285 transitions. [2024-06-03 20:49:32,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 328 transitions, 5156 flow [2024-06-03 20:49:33,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 328 transitions, 4815 flow, removed 46 selfloop flow, removed 9 redundant places. [2024-06-03 20:49:33,253 INFO L231 Difference]: Finished difference. Result has 219 places, 267 transitions, 3934 flow [2024-06-03 20:49:33,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3615, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3934, PETRI_PLACES=219, PETRI_TRANSITIONS=267} [2024-06-03 20:49:33,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-03 20:49:33,254 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 267 transitions, 3934 flow [2024-06-03 20:49:33,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:33,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:33,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:33,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:49:33,255 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:33,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:33,255 INFO L85 PathProgramCache]: Analyzing trace with hash 781300252, now seen corresponding path program 3 times [2024-06-03 20:49:33,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:33,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982629435] [2024-06-03 20:49:33,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:33,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:33,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:33,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982629435] [2024-06-03 20:49:33,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982629435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:33,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:33,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:49:33,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939000777] [2024-06-03 20:49:33,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:33,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:49:33,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:33,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:49:33,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:49:33,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:33,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 267 transitions, 3934 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:33,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:33,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:33,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:34,548 INFO L124 PetriNetUnfolderBase]: 4724/8295 cut-off events. [2024-06-03 20:49:34,549 INFO L125 PetriNetUnfolderBase]: For 404038/404038 co-relation queries the response was YES. [2024-06-03 20:49:34,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51232 conditions, 8295 events. 4724/8295 cut-off events. For 404038/404038 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 62621 event pairs, 1795 based on Foata normal form. 2/8296 useless extension candidates. Maximal degree in co-relation 51132. Up to 7441 conditions per place. [2024-06-03 20:49:34,643 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 218 selfloop transitions, 71 changer transitions 0/296 dead transitions. [2024-06-03 20:49:34,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 296 transitions, 4800 flow [2024-06-03 20:49:34,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:34,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:34,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-03 20:49:34,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-03 20:49:34,645 INFO L175 Difference]: Start difference. First operand has 219 places, 267 transitions, 3934 flow. Second operand 8 states and 198 transitions. [2024-06-03 20:49:34,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 296 transitions, 4800 flow [2024-06-03 20:49:35,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 296 transitions, 4366 flow, removed 50 selfloop flow, removed 10 redundant places. [2024-06-03 20:49:35,403 INFO L231 Difference]: Finished difference. Result has 217 places, 267 transitions, 3651 flow [2024-06-03 20:49:35,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3500, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3651, PETRI_PLACES=217, PETRI_TRANSITIONS=267} [2024-06-03 20:49:35,404 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-03 20:49:35,404 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 267 transitions, 3651 flow [2024-06-03 20:49:35,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:35,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:35,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:35,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:49:35,405 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:35,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:35,406 INFO L85 PathProgramCache]: Analyzing trace with hash -227114182, now seen corresponding path program 4 times [2024-06-03 20:49:35,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:35,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753674274] [2024-06-03 20:49:35,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:35,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:35,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:35,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753674274] [2024-06-03 20:49:35,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753674274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:35,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:35,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:49:35,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227648124] [2024-06-03 20:49:35,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:35,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:49:35,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:35,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:49:35,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:49:35,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:35,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 267 transitions, 3651 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:35,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:35,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:35,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:36,840 INFO L124 PetriNetUnfolderBase]: 4581/8048 cut-off events. [2024-06-03 20:49:36,840 INFO L125 PetriNetUnfolderBase]: For 362629/362629 co-relation queries the response was YES. [2024-06-03 20:49:36,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47521 conditions, 8048 events. 4581/8048 cut-off events. For 362629/362629 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 60333 event pairs, 1731 based on Foata normal form. 4/8051 useless extension candidates. Maximal degree in co-relation 47421. Up to 7223 conditions per place. [2024-06-03 20:49:36,923 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 214 selfloop transitions, 72 changer transitions 0/293 dead transitions. [2024-06-03 20:49:36,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 293 transitions, 4397 flow [2024-06-03 20:49:36,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:36,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:36,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-03 20:49:36,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2024-06-03 20:49:36,924 INFO L175 Difference]: Start difference. First operand has 217 places, 267 transitions, 3651 flow. Second operand 9 states and 214 transitions. [2024-06-03 20:49:36,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 293 transitions, 4397 flow [2024-06-03 20:49:37,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 293 transitions, 4286 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 20:49:37,672 INFO L231 Difference]: Finished difference. Result has 221 places, 267 transitions, 3693 flow [2024-06-03 20:49:37,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3540, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3693, PETRI_PLACES=221, PETRI_TRANSITIONS=267} [2024-06-03 20:49:37,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-03 20:49:37,673 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 267 transitions, 3693 flow [2024-06-03 20:49:37,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:37,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:37,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:37,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:49:37,673 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:37,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:37,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1395175872, now seen corresponding path program 5 times [2024-06-03 20:49:37,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:37,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395066572] [2024-06-03 20:49:37,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:37,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:37,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:37,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:37,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395066572] [2024-06-03 20:49:37,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395066572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:37,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:37,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:49:37,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156406757] [2024-06-03 20:49:37,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:37,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:49:37,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:37,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:49:37,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:49:37,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:37,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 267 transitions, 3693 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:37,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:37,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:37,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:38,961 INFO L124 PetriNetUnfolderBase]: 4490/7866 cut-off events. [2024-06-03 20:49:38,961 INFO L125 PetriNetUnfolderBase]: For 367476/367476 co-relation queries the response was YES. [2024-06-03 20:49:39,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46886 conditions, 7866 events. 4490/7866 cut-off events. For 367476/367476 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 58455 event pairs, 1698 based on Foata normal form. 2/7866 useless extension candidates. Maximal degree in co-relation 46785. Up to 7058 conditions per place. [2024-06-03 20:49:39,037 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 198 selfloop transitions, 80 changer transitions 2/287 dead transitions. [2024-06-03 20:49:39,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 287 transitions, 4525 flow [2024-06-03 20:49:39,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:39,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:39,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-03 20:49:39,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-03 20:49:39,038 INFO L175 Difference]: Start difference. First operand has 221 places, 267 transitions, 3693 flow. Second operand 8 states and 193 transitions. [2024-06-03 20:49:39,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 287 transitions, 4525 flow [2024-06-03 20:49:39,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 287 transitions, 4347 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-03 20:49:39,572 INFO L231 Difference]: Finished difference. Result has 220 places, 265 transitions, 3649 flow [2024-06-03 20:49:39,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3515, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3649, PETRI_PLACES=220, PETRI_TRANSITIONS=265} [2024-06-03 20:49:39,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-03 20:49:39,573 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 265 transitions, 3649 flow [2024-06-03 20:49:39,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:39,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:39,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:39,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:49:39,573 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:39,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:39,574 INFO L85 PathProgramCache]: Analyzing trace with hash 981017752, now seen corresponding path program 6 times [2024-06-03 20:49:39,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:39,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940696091] [2024-06-03 20:49:39,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:39,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:39,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:39,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940696091] [2024-06-03 20:49:39,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940696091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:39,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:39,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:49:39,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308907954] [2024-06-03 20:49:39,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:39,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:49:39,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:39,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:49:39,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:49:39,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:39,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 265 transitions, 3649 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:39,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:39,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:39,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:40,908 INFO L124 PetriNetUnfolderBase]: 4357/7620 cut-off events. [2024-06-03 20:49:40,908 INFO L125 PetriNetUnfolderBase]: For 374809/374809 co-relation queries the response was YES. [2024-06-03 20:49:40,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45858 conditions, 7620 events. 4357/7620 cut-off events. For 374809/374809 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 56135 event pairs, 1643 based on Foata normal form. 2/7620 useless extension candidates. Maximal degree in co-relation 45757. Up to 6831 conditions per place. [2024-06-03 20:49:40,993 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 199 selfloop transitions, 77 changer transitions 2/285 dead transitions. [2024-06-03 20:49:40,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 285 transitions, 4367 flow [2024-06-03 20:49:40,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:40,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:41,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-03 20:49:41,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5529100529100529 [2024-06-03 20:49:41,000 INFO L175 Difference]: Start difference. First operand has 220 places, 265 transitions, 3649 flow. Second operand 9 states and 209 transitions. [2024-06-03 20:49:41,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 285 transitions, 4367 flow [2024-06-03 20:49:41,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 285 transitions, 4101 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-03 20:49:41,890 INFO L231 Difference]: Finished difference. Result has 220 places, 263 transitions, 3518 flow [2024-06-03 20:49:41,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3383, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3518, PETRI_PLACES=220, PETRI_TRANSITIONS=263} [2024-06-03 20:49:41,891 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-03 20:49:41,891 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 263 transitions, 3518 flow [2024-06-03 20:49:41,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:41,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:41,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:41,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:49:41,892 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:41,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:41,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1424635089, now seen corresponding path program 1 times [2024-06-03 20:49:41,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:41,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516096343] [2024-06-03 20:49:41,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:41,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:42,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:42,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516096343] [2024-06-03 20:49:42,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516096343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:42,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:42,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:49:42,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871844526] [2024-06-03 20:49:42,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:42,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:49:42,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:42,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:49:42,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:49:42,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:42,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 263 transitions, 3518 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 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) [2024-06-03 20:49:42,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:42,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:42,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:43,309 INFO L124 PetriNetUnfolderBase]: 4373/7663 cut-off events. [2024-06-03 20:49:43,309 INFO L125 PetriNetUnfolderBase]: For 391003/391003 co-relation queries the response was YES. [2024-06-03 20:49:43,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46514 conditions, 7663 events. 4373/7663 cut-off events. For 391003/391003 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 56548 event pairs, 1631 based on Foata normal form. 2/7664 useless extension candidates. Maximal degree in co-relation 46412. Up to 6943 conditions per place. [2024-06-03 20:49:43,387 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 247 selfloop transitions, 53 changer transitions 4/311 dead transitions. [2024-06-03 20:49:43,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 311 transitions, 4702 flow [2024-06-03 20:49:43,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:43,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 20:49:43,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:49:43,388 INFO L175 Difference]: Start difference. First operand has 220 places, 263 transitions, 3518 flow. Second operand 8 states and 192 transitions. [2024-06-03 20:49:43,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 311 transitions, 4702 flow [2024-06-03 20:49:44,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 311 transitions, 4418 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 20:49:44,159 INFO L231 Difference]: Finished difference. Result has 220 places, 281 transitions, 3742 flow [2024-06-03 20:49:44,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3293, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3742, PETRI_PLACES=220, PETRI_TRANSITIONS=281} [2024-06-03 20:49:44,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-03 20:49:44,160 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 281 transitions, 3742 flow [2024-06-03 20:49:44,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 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) [2024-06-03 20:49:44,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:44,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:44,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 20:49:44,160 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:44,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:44,161 INFO L85 PathProgramCache]: Analyzing trace with hash -215077409, now seen corresponding path program 2 times [2024-06-03 20:49:44,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:44,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402184223] [2024-06-03 20:49:44,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:44,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:44,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:44,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402184223] [2024-06-03 20:49:44,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402184223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:44,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:44,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:49:44,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675217891] [2024-06-03 20:49:44,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:44,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:49:44,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:44,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:49:44,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:49:44,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:44,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 281 transitions, 3742 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 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) [2024-06-03 20:49:44,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:44,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:44,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:45,431 INFO L124 PetriNetUnfolderBase]: 4371/7658 cut-off events. [2024-06-03 20:49:45,431 INFO L125 PetriNetUnfolderBase]: For 402529/402529 co-relation queries the response was YES. [2024-06-03 20:49:45,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46594 conditions, 7658 events. 4371/7658 cut-off events. For 402529/402529 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 56532 event pairs, 1631 based on Foata normal form. 3/7660 useless extension candidates. Maximal degree in co-relation 46489. Up to 6830 conditions per place. [2024-06-03 20:49:45,511 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 213 selfloop transitions, 92 changer transitions 2/314 dead transitions. [2024-06-03 20:49:45,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 314 transitions, 4772 flow [2024-06-03 20:49:45,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:45,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:45,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-03 20:49:45,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-03 20:49:45,513 INFO L175 Difference]: Start difference. First operand has 220 places, 281 transitions, 3742 flow. Second operand 8 states and 194 transitions. [2024-06-03 20:49:45,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 314 transitions, 4772 flow [2024-06-03 20:49:46,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 314 transitions, 4747 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:49:46,335 INFO L231 Difference]: Finished difference. Result has 225 places, 286 transitions, 3990 flow [2024-06-03 20:49:46,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3717, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3990, PETRI_PLACES=225, PETRI_TRANSITIONS=286} [2024-06-03 20:49:46,335 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-03 20:49:46,335 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 286 transitions, 3990 flow [2024-06-03 20:49:46,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 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) [2024-06-03 20:49:46,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:46,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:46,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 20:49:46,336 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:46,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:46,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1676247133, now seen corresponding path program 3 times [2024-06-03 20:49:46,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:46,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360433773] [2024-06-03 20:49:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:46,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:46,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:46,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360433773] [2024-06-03 20:49:46,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360433773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:46,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:46,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:49:46,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904073805] [2024-06-03 20:49:46,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:46,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:49:46,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:46,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:49:46,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:49:46,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:46,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 286 transitions, 3990 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 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) [2024-06-03 20:49:46,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:46,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:46,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:47,761 INFO L124 PetriNetUnfolderBase]: 4297/7513 cut-off events. [2024-06-03 20:49:47,761 INFO L125 PetriNetUnfolderBase]: For 410187/410187 co-relation queries the response was YES. [2024-06-03 20:49:47,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46357 conditions, 7513 events. 4297/7513 cut-off events. For 410187/410187 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 55158 event pairs, 1599 based on Foata normal form. 2/7513 useless extension candidates. Maximal degree in co-relation 46250. Up to 6698 conditions per place. [2024-06-03 20:49:47,827 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 207 selfloop transitions, 85 changer transitions 5/304 dead transitions. [2024-06-03 20:49:47,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 304 transitions, 4748 flow [2024-06-03 20:49:47,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:49:47,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:49:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-03 20:49:47,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:49:47,828 INFO L175 Difference]: Start difference. First operand has 225 places, 286 transitions, 3990 flow. Second operand 7 states and 168 transitions. [2024-06-03 20:49:47,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 304 transitions, 4748 flow [2024-06-03 20:49:48,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 304 transitions, 4657 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 20:49:48,459 INFO L231 Difference]: Finished difference. Result has 228 places, 281 transitions, 3986 flow [2024-06-03 20:49:48,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3899, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3986, PETRI_PLACES=228, PETRI_TRANSITIONS=281} [2024-06-03 20:49:48,460 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-03 20:49:48,460 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 281 transitions, 3986 flow [2024-06-03 20:49:48,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 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) [2024-06-03 20:49:48,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:48,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:48,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 20:49:48,461 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:48,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:48,461 INFO L85 PathProgramCache]: Analyzing trace with hash -430718847, now seen corresponding path program 1 times [2024-06-03 20:49:48,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:48,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611997398] [2024-06-03 20:49:48,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:48,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:48,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:48,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611997398] [2024-06-03 20:49:48,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611997398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:48,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:48,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:49:48,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470936943] [2024-06-03 20:49:48,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:48,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:49:48,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:48,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:49:48,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:49:48,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:49:48,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 281 transitions, 3986 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:48,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:48,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:49:48,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:49,738 INFO L124 PetriNetUnfolderBase]: 3949/6999 cut-off events. [2024-06-03 20:49:49,738 INFO L125 PetriNetUnfolderBase]: For 439724/439724 co-relation queries the response was YES. [2024-06-03 20:49:49,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44190 conditions, 6999 events. 3949/6999 cut-off events. For 439724/439724 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 51481 event pairs, 1416 based on Foata normal form. 17/6965 useless extension candidates. Maximal degree in co-relation 44082. Up to 6138 conditions per place. [2024-06-03 20:49:49,818 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 236 selfloop transitions, 31 changer transitions 0/306 dead transitions. [2024-06-03 20:49:49,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 306 transitions, 4643 flow [2024-06-03 20:49:49,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:49,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:49,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-03 20:49:49,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-03 20:49:49,819 INFO L175 Difference]: Start difference. First operand has 228 places, 281 transitions, 3986 flow. Second operand 8 states and 186 transitions. [2024-06-03 20:49:49,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 306 transitions, 4643 flow [2024-06-03 20:49:50,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 306 transitions, 4247 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-03 20:49:50,682 INFO L231 Difference]: Finished difference. Result has 226 places, 284 transitions, 3721 flow [2024-06-03 20:49:50,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3590, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3721, PETRI_PLACES=226, PETRI_TRANSITIONS=284} [2024-06-03 20:49:50,682 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-03 20:49:50,682 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 284 transitions, 3721 flow [2024-06-03 20:49:50,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:50,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:50,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:50,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 20:49:50,683 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:50,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:50,684 INFO L85 PathProgramCache]: Analyzing trace with hash 531995057, now seen corresponding path program 2 times [2024-06-03 20:49:50,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:50,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240948249] [2024-06-03 20:49:50,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:50,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:50,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:50,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:50,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240948249] [2024-06-03 20:49:50,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240948249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:50,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:50,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:49:50,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398186686] [2024-06-03 20:49:50,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:50,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:49:50,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:50,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:49:50,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:49:50,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:49:50,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 284 transitions, 3721 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:50,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:50,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:49:50,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:52,079 INFO L124 PetriNetUnfolderBase]: 3997/7085 cut-off events. [2024-06-03 20:49:52,080 INFO L125 PetriNetUnfolderBase]: For 439094/439094 co-relation queries the response was YES. [2024-06-03 20:49:52,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44746 conditions, 7085 events. 3997/7085 cut-off events. For 439094/439094 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 52375 event pairs, 1392 based on Foata normal form. 8/7045 useless extension candidates. Maximal degree in co-relation 44638. Up to 6096 conditions per place. [2024-06-03 20:49:52,161 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 243 selfloop transitions, 32 changer transitions 0/314 dead transitions. [2024-06-03 20:49:52,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 314 transitions, 4560 flow [2024-06-03 20:49:52,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:52,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:52,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-03 20:49:52,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-03 20:49:52,162 INFO L175 Difference]: Start difference. First operand has 226 places, 284 transitions, 3721 flow. Second operand 8 states and 188 transitions. [2024-06-03 20:49:52,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 314 transitions, 4560 flow [2024-06-03 20:49:53,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 314 transitions, 4480 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:53,074 INFO L231 Difference]: Finished difference. Result has 229 places, 287 transitions, 3780 flow [2024-06-03 20:49:53,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3641, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3780, PETRI_PLACES=229, PETRI_TRANSITIONS=287} [2024-06-03 20:49:53,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-03 20:49:53,074 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 287 transitions, 3780 flow [2024-06-03 20:49:53,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:53,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:53,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:53,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 20:49:53,075 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:53,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:53,075 INFO L85 PathProgramCache]: Analyzing trace with hash -848471015, now seen corresponding path program 1 times [2024-06-03 20:49:53,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:53,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918932724] [2024-06-03 20:49:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:53,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:53,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:53,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918932724] [2024-06-03 20:49:53,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918932724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:53,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:53,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:49:53,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692020648] [2024-06-03 20:49:53,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:53,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:49:53,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:53,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:49:53,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:49:53,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:53,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 287 transitions, 3780 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:53,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:53,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:53,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:54,420 INFO L124 PetriNetUnfolderBase]: 4187/7331 cut-off events. [2024-06-03 20:49:54,421 INFO L125 PetriNetUnfolderBase]: For 440397/440397 co-relation queries the response was YES. [2024-06-03 20:49:54,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46143 conditions, 7331 events. 4187/7331 cut-off events. For 440397/440397 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 53463 event pairs, 1421 based on Foata normal form. 2/7332 useless extension candidates. Maximal degree in co-relation 46033. Up to 6692 conditions per place. [2024-06-03 20:49:54,502 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 281 selfloop transitions, 22 changer transitions 0/310 dead transitions. [2024-06-03 20:49:54,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 310 transitions, 4674 flow [2024-06-03 20:49:54,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:49:54,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:49:54,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-03 20:49:54,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-03 20:49:54,503 INFO L175 Difference]: Start difference. First operand has 229 places, 287 transitions, 3780 flow. Second operand 6 states and 142 transitions. [2024-06-03 20:49:54,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 310 transitions, 4674 flow [2024-06-03 20:49:55,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 310 transitions, 4629 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 20:49:55,397 INFO L231 Difference]: Finished difference. Result has 231 places, 291 transitions, 3904 flow [2024-06-03 20:49:55,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3735, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3904, PETRI_PLACES=231, PETRI_TRANSITIONS=291} [2024-06-03 20:49:55,398 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-03 20:49:55,398 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 291 transitions, 3904 flow [2024-06-03 20:49:55,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:55,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:55,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:55,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 20:49:55,399 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:55,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:55,399 INFO L85 PathProgramCache]: Analyzing trace with hash -848410565, now seen corresponding path program 2 times [2024-06-03 20:49:55,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:55,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479375379] [2024-06-03 20:49:55,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:55,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:55,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:55,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479375379] [2024-06-03 20:49:55,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479375379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:55,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:55,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:49:55,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918979616] [2024-06-03 20:49:55,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:55,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:49:55,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:55,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:49:55,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:49:55,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:55,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 291 transitions, 3904 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:55,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:55,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:55,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:56,779 INFO L124 PetriNetUnfolderBase]: 4182/7324 cut-off events. [2024-06-03 20:49:56,779 INFO L125 PetriNetUnfolderBase]: For 449107/449107 co-relation queries the response was YES. [2024-06-03 20:49:56,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46177 conditions, 7324 events. 4182/7324 cut-off events. For 449107/449107 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 53425 event pairs, 1504 based on Foata normal form. 2/7325 useless extension candidates. Maximal degree in co-relation 46065. Up to 6720 conditions per place. [2024-06-03 20:49:56,847 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 278 selfloop transitions, 20 changer transitions 0/305 dead transitions. [2024-06-03 20:49:56,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 305 transitions, 4534 flow [2024-06-03 20:49:56,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:49:56,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:49:56,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-03 20:49:56,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:49:56,848 INFO L175 Difference]: Start difference. First operand has 231 places, 291 transitions, 3904 flow. Second operand 6 states and 138 transitions. [2024-06-03 20:49:56,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 305 transitions, 4534 flow [2024-06-03 20:49:57,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 305 transitions, 4415 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-06-03 20:49:57,502 INFO L231 Difference]: Finished difference. Result has 235 places, 291 transitions, 3830 flow [2024-06-03 20:49:57,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3785, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3830, PETRI_PLACES=235, PETRI_TRANSITIONS=291} [2024-06-03 20:49:57,503 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-03 20:49:57,503 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 291 transitions, 3830 flow [2024-06-03 20:49:57,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:57,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:57,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:57,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 20:49:57,503 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:57,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:57,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1922542821, now seen corresponding path program 1 times [2024-06-03 20:49:57,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:57,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373590400] [2024-06-03 20:49:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:57,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:57,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:57,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373590400] [2024-06-03 20:49:57,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373590400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:57,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:57,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:57,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373127606] [2024-06-03 20:49:57,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:57,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:57,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:57,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:57,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:57,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:57,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 291 transitions, 3830 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:57,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:57,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:57,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:58,845 INFO L124 PetriNetUnfolderBase]: 4254/7440 cut-off events. [2024-06-03 20:49:58,845 INFO L125 PetriNetUnfolderBase]: For 502035/502035 co-relation queries the response was YES. [2024-06-03 20:49:58,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46904 conditions, 7440 events. 4254/7440 cut-off events. For 502035/502035 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54284 event pairs, 1512 based on Foata normal form. 20/7459 useless extension candidates. Maximal degree in co-relation 46790. Up to 6538 conditions per place. [2024-06-03 20:49:58,927 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 224 selfloop transitions, 94 changer transitions 0/325 dead transitions. [2024-06-03 20:49:58,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 325 transitions, 4744 flow [2024-06-03 20:49:58,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:49:58,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:49:58,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-03 20:49:58,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-03 20:49:58,929 INFO L175 Difference]: Start difference. First operand has 235 places, 291 transitions, 3830 flow. Second operand 10 states and 235 transitions. [2024-06-03 20:49:58,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 325 transitions, 4744 flow [2024-06-03 20:49:59,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 325 transitions, 4694 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 20:49:59,961 INFO L231 Difference]: Finished difference. Result has 240 places, 294 transitions, 4045 flow [2024-06-03 20:49:59,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3780, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4045, PETRI_PLACES=240, PETRI_TRANSITIONS=294} [2024-06-03 20:49:59,961 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-03 20:49:59,961 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 294 transitions, 4045 flow [2024-06-03 20:49:59,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:59,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:59,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:59,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 20:49:59,962 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:59,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:59,962 INFO L85 PathProgramCache]: Analyzing trace with hash -424045663, now seen corresponding path program 2 times [2024-06-03 20:49:59,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:59,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862329322] [2024-06-03 20:49:59,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:59,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:00,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:00,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862329322] [2024-06-03 20:50:00,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862329322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:00,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:00,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:00,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466274769] [2024-06-03 20:50:00,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:00,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:00,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:00,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:00,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:00,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:00,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 294 transitions, 4045 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:00,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:00,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:00,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:01,438 INFO L124 PetriNetUnfolderBase]: 4270/7467 cut-off events. [2024-06-03 20:50:01,439 INFO L125 PetriNetUnfolderBase]: For 483844/483844 co-relation queries the response was YES. [2024-06-03 20:50:01,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47801 conditions, 7467 events. 4270/7467 cut-off events. For 483844/483844 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54571 event pairs, 1524 based on Foata normal form. 4/7469 useless extension candidates. Maximal degree in co-relation 47686. Up to 6632 conditions per place. [2024-06-03 20:50:01,506 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 205 selfloop transitions, 106 changer transitions 0/318 dead transitions. [2024-06-03 20:50:01,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 318 transitions, 4917 flow [2024-06-03 20:50:01,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:50:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:50:01,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-03 20:50:01,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5529100529100529 [2024-06-03 20:50:01,507 INFO L175 Difference]: Start difference. First operand has 240 places, 294 transitions, 4045 flow. Second operand 9 states and 209 transitions. [2024-06-03 20:50:01,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 318 transitions, 4917 flow [2024-06-03 20:50:02,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 318 transitions, 4684 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-03 20:50:02,644 INFO L231 Difference]: Finished difference. Result has 241 places, 297 transitions, 4104 flow [2024-06-03 20:50:02,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3812, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4104, PETRI_PLACES=241, PETRI_TRANSITIONS=297} [2024-06-03 20:50:02,644 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-03 20:50:02,644 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 297 transitions, 4104 flow [2024-06-03 20:50:02,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:02,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:02,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:02,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 20:50:02,645 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:02,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:02,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1927684805, now seen corresponding path program 3 times [2024-06-03 20:50:02,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:02,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312766051] [2024-06-03 20:50:02,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:02,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:02,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:02,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312766051] [2024-06-03 20:50:02,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312766051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:02,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:02,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:02,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644334826] [2024-06-03 20:50:02,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:02,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:02,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:02,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:02,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:02,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:02,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 297 transitions, 4104 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:02,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:02,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:02,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:04,092 INFO L124 PetriNetUnfolderBase]: 4286/7491 cut-off events. [2024-06-03 20:50:04,092 INFO L125 PetriNetUnfolderBase]: For 498923/498923 co-relation queries the response was YES. [2024-06-03 20:50:04,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48058 conditions, 7491 events. 4286/7491 cut-off events. For 498923/498923 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54683 event pairs, 1528 based on Foata normal form. 4/7493 useless extension candidates. Maximal degree in co-relation 47942. Up to 6654 conditions per place. [2024-06-03 20:50:04,172 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 214 selfloop transitions, 101 changer transitions 0/322 dead transitions. [2024-06-03 20:50:04,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 322 transitions, 4994 flow [2024-06-03 20:50:04,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:50:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:50:04,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-03 20:50:04,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404761904761904 [2024-06-03 20:50:04,173 INFO L175 Difference]: Start difference. First operand has 241 places, 297 transitions, 4104 flow. Second operand 10 states and 227 transitions. [2024-06-03 20:50:04,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 322 transitions, 4994 flow [2024-06-03 20:50:05,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 322 transitions, 4724 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-03 20:50:05,172 INFO L231 Difference]: Finished difference. Result has 244 places, 300 transitions, 4123 flow [2024-06-03 20:50:05,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3834, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4123, PETRI_PLACES=244, PETRI_TRANSITIONS=300} [2024-06-03 20:50:05,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-03 20:50:05,172 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 300 transitions, 4123 flow [2024-06-03 20:50:05,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:05,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:05,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:05,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 20:50:05,173 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:05,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:05,173 INFO L85 PathProgramCache]: Analyzing trace with hash 583713731, now seen corresponding path program 4 times [2024-06-03 20:50:05,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:05,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597714433] [2024-06-03 20:50:05,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:05,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:05,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:05,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597714433] [2024-06-03 20:50:05,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597714433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:05,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:05,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:05,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713532629] [2024-06-03 20:50:05,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:05,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:05,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:05,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:05,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:05,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:05,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 300 transitions, 4123 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:05,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:05,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:05,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:06,749 INFO L124 PetriNetUnfolderBase]: 4289/7496 cut-off events. [2024-06-03 20:50:06,750 INFO L125 PetriNetUnfolderBase]: For 509262/509262 co-relation queries the response was YES. [2024-06-03 20:50:06,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48113 conditions, 7496 events. 4289/7496 cut-off events. For 509262/509262 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54857 event pairs, 1509 based on Foata normal form. 4/7498 useless extension candidates. Maximal degree in co-relation 47996. Up to 6537 conditions per place. [2024-06-03 20:50:06,815 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 206 selfloop transitions, 117 changer transitions 0/330 dead transitions. [2024-06-03 20:50:06,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 330 transitions, 5084 flow [2024-06-03 20:50:06,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:50:06,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:50:06,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-03 20:50:06,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-03 20:50:06,816 INFO L175 Difference]: Start difference. First operand has 244 places, 300 transitions, 4123 flow. Second operand 9 states and 213 transitions. [2024-06-03 20:50:06,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 330 transitions, 5084 flow [2024-06-03 20:50:07,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 330 transitions, 4819 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-03 20:50:07,730 INFO L231 Difference]: Finished difference. Result has 246 places, 305 transitions, 4235 flow [2024-06-03 20:50:07,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3858, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4235, PETRI_PLACES=246, PETRI_TRANSITIONS=305} [2024-06-03 20:50:07,731 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-03 20:50:07,731 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 305 transitions, 4235 flow [2024-06-03 20:50:07,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:07,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:07,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:07,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 20:50:07,731 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:07,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:07,732 INFO L85 PathProgramCache]: Analyzing trace with hash -291010471, now seen corresponding path program 1 times [2024-06-03 20:50:07,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:07,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068012032] [2024-06-03 20:50:07,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:07,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:07,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:07,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068012032] [2024-06-03 20:50:07,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068012032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:07,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:07,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:07,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959500913] [2024-06-03 20:50:07,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:07,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:07,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:07,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:07,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:07,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:07,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 305 transitions, 4235 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:07,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:07,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:07,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:09,061 INFO L124 PetriNetUnfolderBase]: 4291/7495 cut-off events. [2024-06-03 20:50:09,061 INFO L125 PetriNetUnfolderBase]: For 515253/515253 co-relation queries the response was YES. [2024-06-03 20:50:09,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48409 conditions, 7495 events. 4291/7495 cut-off events. For 515253/515253 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54697 event pairs, 1509 based on Foata normal form. 2/7496 useless extension candidates. Maximal degree in co-relation 48290. Up to 6817 conditions per place. [2024-06-03 20:50:09,149 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 285 selfloop transitions, 44 changer transitions 0/336 dead transitions. [2024-06-03 20:50:09,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 336 transitions, 5150 flow [2024-06-03 20:50:09,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:09,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:09,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-03 20:50:09,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-03 20:50:09,150 INFO L175 Difference]: Start difference. First operand has 246 places, 305 transitions, 4235 flow. Second operand 8 states and 194 transitions. [2024-06-03 20:50:09,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 336 transitions, 5150 flow [2024-06-03 20:50:10,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 336 transitions, 4920 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-03 20:50:10,336 INFO L231 Difference]: Finished difference. Result has 249 places, 308 transitions, 4152 flow [2024-06-03 20:50:10,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4005, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4152, PETRI_PLACES=249, PETRI_TRANSITIONS=308} [2024-06-03 20:50:10,336 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-03 20:50:10,336 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 308 transitions, 4152 flow [2024-06-03 20:50:10,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:10,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:10,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:10,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 20:50:10,337 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:10,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:10,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1149284775, now seen corresponding path program 2 times [2024-06-03 20:50:10,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:10,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122827846] [2024-06-03 20:50:10,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:10,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:10,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:10,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122827846] [2024-06-03 20:50:10,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122827846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:10,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:10,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:10,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150831273] [2024-06-03 20:50:10,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:10,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:10,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:10,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:10,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:10,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:10,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 308 transitions, 4152 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:10,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:10,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:10,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:11,934 INFO L124 PetriNetUnfolderBase]: 4301/7511 cut-off events. [2024-06-03 20:50:11,934 INFO L125 PetriNetUnfolderBase]: For 524290/524290 co-relation queries the response was YES. [2024-06-03 20:50:11,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48546 conditions, 7511 events. 4301/7511 cut-off events. For 524290/524290 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54814 event pairs, 1515 based on Foata normal form. 1/7511 useless extension candidates. Maximal degree in co-relation 48425. Up to 6823 conditions per place. [2024-06-03 20:50:12,003 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 286 selfloop transitions, 51 changer transitions 0/344 dead transitions. [2024-06-03 20:50:12,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 344 transitions, 5137 flow [2024-06-03 20:50:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:50:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:50:12,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-03 20:50:12,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:50:12,004 INFO L175 Difference]: Start difference. First operand has 249 places, 308 transitions, 4152 flow. Second operand 10 states and 230 transitions. [2024-06-03 20:50:12,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 344 transitions, 5137 flow [2024-06-03 20:50:13,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 344 transitions, 5048 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 20:50:13,355 INFO L231 Difference]: Finished difference. Result has 254 places, 314 transitions, 4270 flow [2024-06-03 20:50:13,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4070, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4270, PETRI_PLACES=254, PETRI_TRANSITIONS=314} [2024-06-03 20:50:13,355 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-03 20:50:13,356 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 314 transitions, 4270 flow [2024-06-03 20:50:13,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:13,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:13,356 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] [2024-06-03 20:50:13,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 20:50:13,356 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:13,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:13,357 INFO L85 PathProgramCache]: Analyzing trace with hash -895802785, now seen corresponding path program 3 times [2024-06-03 20:50:13,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:13,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418863247] [2024-06-03 20:50:13,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:13,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:13,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:13,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418863247] [2024-06-03 20:50:13,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418863247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:13,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:13,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:13,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692498360] [2024-06-03 20:50:13,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:13,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:13,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:13,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:13,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:13,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:13,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 314 transitions, 4270 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:13,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:13,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:13,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:14,859 INFO L124 PetriNetUnfolderBase]: 4311/7529 cut-off events. [2024-06-03 20:50:14,859 INFO L125 PetriNetUnfolderBase]: For 541542/541542 co-relation queries the response was YES. [2024-06-03 20:50:14,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48861 conditions, 7529 events. 4311/7529 cut-off events. For 541542/541542 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54982 event pairs, 1505 based on Foata normal form. 2/7529 useless extension candidates. Maximal degree in co-relation 48739. Up to 6389 conditions per place. [2024-06-03 20:50:14,946 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 207 selfloop transitions, 132 changer transitions 0/346 dead transitions. [2024-06-03 20:50:14,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 346 transitions, 5638 flow [2024-06-03 20:50:14,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:14,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:14,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-03 20:50:14,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-03 20:50:14,947 INFO L175 Difference]: Start difference. First operand has 254 places, 314 transitions, 4270 flow. Second operand 8 states and 203 transitions. [2024-06-03 20:50:14,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 346 transitions, 5638 flow [2024-06-03 20:50:16,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 346 transitions, 5524 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 20:50:16,364 INFO L231 Difference]: Finished difference. Result has 255 places, 318 transitions, 4485 flow [2024-06-03 20:50:16,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4156, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4485, PETRI_PLACES=255, PETRI_TRANSITIONS=318} [2024-06-03 20:50:16,365 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-03 20:50:16,365 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 318 transitions, 4485 flow [2024-06-03 20:50:16,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:16,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:16,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:16,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 20:50:16,365 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:16,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:16,366 INFO L85 PathProgramCache]: Analyzing trace with hash -155865591, now seen corresponding path program 4 times [2024-06-03 20:50:16,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:16,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576712632] [2024-06-03 20:50:16,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:16,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:16,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:16,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576712632] [2024-06-03 20:50:16,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576712632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:16,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:16,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:16,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892336880] [2024-06-03 20:50:16,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:16,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:16,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:16,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:16,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:16,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:16,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 318 transitions, 4485 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:16,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:16,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:16,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:18,009 INFO L124 PetriNetUnfolderBase]: 4313/7534 cut-off events. [2024-06-03 20:50:18,009 INFO L125 PetriNetUnfolderBase]: For 555115/555115 co-relation queries the response was YES. [2024-06-03 20:50:18,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49402 conditions, 7534 events. 4313/7534 cut-off events. For 555115/555115 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55027 event pairs, 1505 based on Foata normal form. 2/7534 useless extension candidates. Maximal degree in co-relation 49279. Up to 6389 conditions per place. [2024-06-03 20:50:18,087 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 201 selfloop transitions, 137 changer transitions 0/345 dead transitions. [2024-06-03 20:50:18,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 345 transitions, 5699 flow [2024-06-03 20:50:18,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:18,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:18,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-03 20:50:18,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-03 20:50:18,089 INFO L175 Difference]: Start difference. First operand has 255 places, 318 transitions, 4485 flow. Second operand 8 states and 198 transitions. [2024-06-03 20:50:18,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 345 transitions, 5699 flow [2024-06-03 20:50:19,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 345 transitions, 5447 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 20:50:19,226 INFO L231 Difference]: Finished difference. Result has 258 places, 321 transitions, 4564 flow [2024-06-03 20:50:19,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4235, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4564, PETRI_PLACES=258, PETRI_TRANSITIONS=321} [2024-06-03 20:50:19,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-03 20:50:19,227 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 321 transitions, 4564 flow [2024-06-03 20:50:19,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:19,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:19,228 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] [2024-06-03 20:50:19,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 20:50:19,228 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:19,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:19,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1076033547, now seen corresponding path program 5 times [2024-06-03 20:50:19,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:19,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002447788] [2024-06-03 20:50:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:19,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:19,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:19,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:19,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:19,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002447788] [2024-06-03 20:50:19,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002447788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:19,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:19,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:19,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655769942] [2024-06-03 20:50:19,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:19,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:19,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:19,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:19,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:19,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:19,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 321 transitions, 4564 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:19,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:19,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:19,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:20,743 INFO L124 PetriNetUnfolderBase]: 4342/7580 cut-off events. [2024-06-03 20:50:20,743 INFO L125 PetriNetUnfolderBase]: For 575457/575457 co-relation queries the response was YES. [2024-06-03 20:50:20,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50187 conditions, 7580 events. 4342/7580 cut-off events. For 575457/575457 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55267 event pairs, 1517 based on Foata normal form. 1/7579 useless extension candidates. Maximal degree in co-relation 50063. Up to 6403 conditions per place. [2024-06-03 20:50:20,828 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 191 selfloop transitions, 155 changer transitions 0/353 dead transitions. [2024-06-03 20:50:20,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 353 transitions, 6064 flow [2024-06-03 20:50:20,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:20,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:20,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-03 20:50:20,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-03 20:50:20,829 INFO L175 Difference]: Start difference. First operand has 258 places, 321 transitions, 4564 flow. Second operand 8 states and 193 transitions. [2024-06-03 20:50:20,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 353 transitions, 6064 flow [2024-06-03 20:50:22,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 353 transitions, 5813 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-03 20:50:22,042 INFO L231 Difference]: Finished difference. Result has 263 places, 331 transitions, 4865 flow [2024-06-03 20:50:22,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4323, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4865, PETRI_PLACES=263, PETRI_TRANSITIONS=331} [2024-06-03 20:50:22,042 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-03 20:50:22,042 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 331 transitions, 4865 flow [2024-06-03 20:50:22,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:22,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:22,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:22,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 20:50:22,043 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:22,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:22,044 INFO L85 PathProgramCache]: Analyzing trace with hash -90607561, now seen corresponding path program 6 times [2024-06-03 20:50:22,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:22,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678142698] [2024-06-03 20:50:22,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:22,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:22,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:22,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678142698] [2024-06-03 20:50:22,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678142698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:22,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:22,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:22,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235835555] [2024-06-03 20:50:22,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:22,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:22,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:22,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:22,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:22,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:22,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 331 transitions, 4865 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:22,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:22,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:22,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:23,487 INFO L124 PetriNetUnfolderBase]: 4339/7576 cut-off events. [2024-06-03 20:50:23,487 INFO L125 PetriNetUnfolderBase]: For 588716/588716 co-relation queries the response was YES. [2024-06-03 20:50:23,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50434 conditions, 7576 events. 4339/7576 cut-off events. For 588716/588716 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55362 event pairs, 1517 based on Foata normal form. 1/7576 useless extension candidates. Maximal degree in co-relation 50307. Up to 6922 conditions per place. [2024-06-03 20:50:23,593 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 306 selfloop transitions, 36 changer transitions 0/349 dead transitions. [2024-06-03 20:50:23,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 349 transitions, 5593 flow [2024-06-03 20:50:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:23,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:23,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-03 20:50:23,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 20:50:23,594 INFO L175 Difference]: Start difference. First operand has 263 places, 331 transitions, 4865 flow. Second operand 8 states and 180 transitions. [2024-06-03 20:50:23,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 349 transitions, 5593 flow [2024-06-03 20:50:24,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 349 transitions, 5397 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-03 20:50:24,946 INFO L231 Difference]: Finished difference. Result has 268 places, 331 transitions, 4747 flow [2024-06-03 20:50:24,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4669, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4747, PETRI_PLACES=268, PETRI_TRANSITIONS=331} [2024-06-03 20:50:24,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-03 20:50:24,946 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 331 transitions, 4747 flow [2024-06-03 20:50:24,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:24,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:24,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:24,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 20:50:24,947 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:24,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:24,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1576221545, now seen corresponding path program 1 times [2024-06-03 20:50:24,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:24,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531392135] [2024-06-03 20:50:24,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:24,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:25,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:25,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531392135] [2024-06-03 20:50:25,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531392135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:25,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:25,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:25,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541931325] [2024-06-03 20:50:25,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:25,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:25,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:25,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:25,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:25,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:25,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 331 transitions, 4747 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:25,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:25,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:25,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:26,373 INFO L124 PetriNetUnfolderBase]: 4334/7569 cut-off events. [2024-06-03 20:50:26,373 INFO L125 PetriNetUnfolderBase]: For 600685/600685 co-relation queries the response was YES. [2024-06-03 20:50:26,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50019 conditions, 7569 events. 4334/7569 cut-off events. For 600685/600685 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55314 event pairs, 1377 based on Foata normal form. 2/7570 useless extension candidates. Maximal degree in co-relation 49891. Up to 6831 conditions per place. [2024-06-03 20:50:26,459 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 317 selfloop transitions, 41 changer transitions 0/365 dead transitions. [2024-06-03 20:50:26,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 365 transitions, 5734 flow [2024-06-03 20:50:26,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:26,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:26,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-03 20:50:26,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-03 20:50:26,460 INFO L175 Difference]: Start difference. First operand has 268 places, 331 transitions, 4747 flow. Second operand 8 states and 194 transitions. [2024-06-03 20:50:26,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 365 transitions, 5734 flow [2024-06-03 20:50:27,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 365 transitions, 5654 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-03 20:50:27,885 INFO L231 Difference]: Finished difference. Result has 270 places, 332 transitions, 4779 flow [2024-06-03 20:50:27,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4667, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4779, PETRI_PLACES=270, PETRI_TRANSITIONS=332} [2024-06-03 20:50:27,885 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-03 20:50:27,886 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 332 transitions, 4779 flow [2024-06-03 20:50:27,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:27,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:27,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:27,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 20:50:27,886 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:27,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:27,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1567650665, now seen corresponding path program 2 times [2024-06-03 20:50:27,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:27,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426072599] [2024-06-03 20:50:27,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:27,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:28,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:28,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426072599] [2024-06-03 20:50:28,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426072599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:28,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:28,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:28,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432654078] [2024-06-03 20:50:28,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:28,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:28,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:28,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:28,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:28,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:28,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 332 transitions, 4779 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:28,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:28,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:28,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:29,350 INFO L124 PetriNetUnfolderBase]: 4342/7579 cut-off events. [2024-06-03 20:50:29,350 INFO L125 PetriNetUnfolderBase]: For 616195/616195 co-relation queries the response was YES. [2024-06-03 20:50:29,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50402 conditions, 7579 events. 4342/7579 cut-off events. For 616195/616195 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55309 event pairs, 1510 based on Foata normal form. 2/7578 useless extension candidates. Maximal degree in co-relation 50273. Up to 6924 conditions per place. [2024-06-03 20:50:29,437 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 316 selfloop transitions, 36 changer transitions 0/359 dead transitions. [2024-06-03 20:50:29,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 359 transitions, 5595 flow [2024-06-03 20:50:29,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:29,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-03 20:50:29,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-03 20:50:29,438 INFO L175 Difference]: Start difference. First operand has 270 places, 332 transitions, 4779 flow. Second operand 8 states and 186 transitions. [2024-06-03 20:50:29,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 359 transitions, 5595 flow [2024-06-03 20:50:30,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 359 transitions, 5415 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-03 20:50:31,002 INFO L231 Difference]: Finished difference. Result has 270 places, 334 transitions, 4730 flow [2024-06-03 20:50:31,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4608, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4730, PETRI_PLACES=270, PETRI_TRANSITIONS=334} [2024-06-03 20:50:31,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-03 20:50:31,003 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 334 transitions, 4730 flow [2024-06-03 20:50:31,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:31,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:31,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:31,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 20:50:31,003 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:31,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:31,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1620634695, now seen corresponding path program 3 times [2024-06-03 20:50:31,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:31,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949777671] [2024-06-03 20:50:31,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:31,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:31,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:31,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949777671] [2024-06-03 20:50:31,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949777671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:31,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:31,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:31,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841288898] [2024-06-03 20:50:31,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:31,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:31,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:31,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:31,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:31,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:31,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 334 transitions, 4730 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:31,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:31,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:31,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:32,709 INFO L124 PetriNetUnfolderBase]: 4337/7572 cut-off events. [2024-06-03 20:50:32,710 INFO L125 PetriNetUnfolderBase]: For 624488/624488 co-relation queries the response was YES. [2024-06-03 20:50:32,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49992 conditions, 7572 events. 4337/7572 cut-off events. For 624488/624488 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55224 event pairs, 1511 based on Foata normal form. 2/7573 useless extension candidates. Maximal degree in co-relation 49864. Up to 6917 conditions per place. [2024-06-03 20:50:32,792 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 311 selfloop transitions, 35 changer transitions 0/353 dead transitions. [2024-06-03 20:50:32,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 353 transitions, 5468 flow [2024-06-03 20:50:32,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:32,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:32,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-03 20:50:32,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 20:50:32,793 INFO L175 Difference]: Start difference. First operand has 270 places, 334 transitions, 4730 flow. Second operand 8 states and 180 transitions. [2024-06-03 20:50:32,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 353 transitions, 5468 flow [2024-06-03 20:50:34,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 353 transitions, 5353 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-03 20:50:34,046 INFO L231 Difference]: Finished difference. Result has 272 places, 334 transitions, 4690 flow [2024-06-03 20:50:34,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4615, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4690, PETRI_PLACES=272, PETRI_TRANSITIONS=334} [2024-06-03 20:50:34,046 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-03 20:50:34,047 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 334 transitions, 4690 flow [2024-06-03 20:50:34,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:34,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:34,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:34,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 20:50:34,047 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:34,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:34,047 INFO L85 PathProgramCache]: Analyzing trace with hash -885320166, now seen corresponding path program 1 times [2024-06-03 20:50:34,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:34,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390064525] [2024-06-03 20:50:34,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:34,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:34,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:34,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390064525] [2024-06-03 20:50:34,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390064525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:34,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:34,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:50:34,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843339285] [2024-06-03 20:50:34,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:34,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:50:34,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:34,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:50:34,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:50:34,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:34,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 334 transitions, 4690 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:34,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:34,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:34,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:35,405 INFO L124 PetriNetUnfolderBase]: 4334/7568 cut-off events. [2024-06-03 20:50:35,405 INFO L125 PetriNetUnfolderBase]: For 634065/634065 co-relation queries the response was YES. [2024-06-03 20:50:35,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49992 conditions, 7568 events. 4334/7568 cut-off events. For 634065/634065 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55195 event pairs, 1510 based on Foata normal form. 1/7568 useless extension candidates. Maximal degree in co-relation 49863. Up to 6738 conditions per place. [2024-06-03 20:50:35,495 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 261 selfloop transitions, 97 changer transitions 0/365 dead transitions. [2024-06-03 20:50:35,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 365 transitions, 5484 flow [2024-06-03 20:50:35,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:50:35,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:50:35,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-03 20:50:35,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:50:35,496 INFO L175 Difference]: Start difference. First operand has 272 places, 334 transitions, 4690 flow. Second operand 9 states and 216 transitions. [2024-06-03 20:50:35,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 365 transitions, 5484 flow [2024-06-03 20:50:37,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 365 transitions, 5399 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 20:50:37,434 INFO L231 Difference]: Finished difference. Result has 275 places, 334 transitions, 4811 flow [2024-06-03 20:50:37,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4605, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4811, PETRI_PLACES=275, PETRI_TRANSITIONS=334} [2024-06-03 20:50:37,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-03 20:50:37,435 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 334 transitions, 4811 flow [2024-06-03 20:50:37,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:37,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:37,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:37,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 20:50:37,435 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:37,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:37,435 INFO L85 PathProgramCache]: Analyzing trace with hash 432064567, now seen corresponding path program 7 times [2024-06-03 20:50:37,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:37,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901148997] [2024-06-03 20:50:37,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:37,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:37,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:37,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901148997] [2024-06-03 20:50:37,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901148997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:37,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:37,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:37,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346446870] [2024-06-03 20:50:37,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:37,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:37,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:37,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:37,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:37,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:37,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 334 transitions, 4811 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:37,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:37,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:37,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:39,035 INFO L124 PetriNetUnfolderBase]: 4344/7586 cut-off events. [2024-06-03 20:50:39,035 INFO L125 PetriNetUnfolderBase]: For 653518/653518 co-relation queries the response was YES. [2024-06-03 20:50:39,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50533 conditions, 7586 events. 4344/7586 cut-off events. For 653518/653518 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55435 event pairs, 1456 based on Foata normal form. 2/7587 useless extension candidates. Maximal degree in co-relation 50403. Up to 6404 conditions per place. [2024-06-03 20:50:39,113 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 234 selfloop transitions, 130 changer transitions 0/371 dead transitions. [2024-06-03 20:50:39,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 371 transitions, 5997 flow [2024-06-03 20:50:39,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:50:39,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:50:39,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-03 20:50:39,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-03 20:50:39,114 INFO L175 Difference]: Start difference. First operand has 275 places, 334 transitions, 4811 flow. Second operand 9 states and 224 transitions. [2024-06-03 20:50:39,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 371 transitions, 5997 flow [2024-06-03 20:50:40,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 371 transitions, 5731 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-03 20:50:40,601 INFO L231 Difference]: Finished difference. Result has 274 places, 338 transitions, 4881 flow [2024-06-03 20:50:40,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4881, PETRI_PLACES=274, PETRI_TRANSITIONS=338} [2024-06-03 20:50:40,602 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-03 20:50:40,602 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 338 transitions, 4881 flow [2024-06-03 20:50:40,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:40,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:40,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:40,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 20:50:40,602 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:40,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:40,603 INFO L85 PathProgramCache]: Analyzing trace with hash -196369527, now seen corresponding path program 8 times [2024-06-03 20:50:40,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:40,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465979828] [2024-06-03 20:50:40,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:40,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:40,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:40,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465979828] [2024-06-03 20:50:40,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465979828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:40,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:40,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:40,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026367643] [2024-06-03 20:50:40,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:40,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:40,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:40,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:40,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:40,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:40,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 338 transitions, 4881 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:40,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:40,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:40,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:42,090 INFO L124 PetriNetUnfolderBase]: 4338/7578 cut-off events. [2024-06-03 20:50:42,091 INFO L125 PetriNetUnfolderBase]: For 648482/648482 co-relation queries the response was YES. [2024-06-03 20:50:42,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50450 conditions, 7578 events. 4338/7578 cut-off events. For 648482/648482 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55275 event pairs, 1456 based on Foata normal form. 2/7579 useless extension candidates. Maximal degree in co-relation 50320. Up to 6401 conditions per place. [2024-06-03 20:50:42,184 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 232 selfloop transitions, 129 changer transitions 0/368 dead transitions. [2024-06-03 20:50:42,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 368 transitions, 5993 flow [2024-06-03 20:50:42,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:50:42,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:50:42,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-03 20:50:42,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846560846560847 [2024-06-03 20:50:42,185 INFO L175 Difference]: Start difference. First operand has 274 places, 338 transitions, 4881 flow. Second operand 9 states and 221 transitions. [2024-06-03 20:50:42,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 368 transitions, 5993 flow [2024-06-03 20:50:44,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 368 transitions, 5747 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 20:50:44,016 INFO L231 Difference]: Finished difference. Result has 277 places, 338 transitions, 4900 flow [2024-06-03 20:50:44,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4635, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4900, PETRI_PLACES=277, PETRI_TRANSITIONS=338} [2024-06-03 20:50:44,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-03 20:50:44,016 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 338 transitions, 4900 flow [2024-06-03 20:50:44,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:44,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:44,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:44,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 20:50:44,017 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:44,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:44,017 INFO L85 PathProgramCache]: Analyzing trace with hash -545028041, now seen corresponding path program 9 times [2024-06-03 20:50:44,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:44,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679488952] [2024-06-03 20:50:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:44,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:44,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:44,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679488952] [2024-06-03 20:50:44,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679488952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:44,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:44,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:44,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555789136] [2024-06-03 20:50:44,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:44,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:44,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:44,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:44,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:44,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:44,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 338 transitions, 4900 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:44,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:44,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:44,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:45,642 INFO L124 PetriNetUnfolderBase]: 4350/7601 cut-off events. [2024-06-03 20:50:45,642 INFO L125 PetriNetUnfolderBase]: For 667515/667515 co-relation queries the response was YES. [2024-06-03 20:50:45,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50733 conditions, 7601 events. 4350/7601 cut-off events. For 667515/667515 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55605 event pairs, 1487 based on Foata normal form. 4/7604 useless extension candidates. Maximal degree in co-relation 50602. Up to 6408 conditions per place. [2024-06-03 20:50:45,942 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 225 selfloop transitions, 141 changer transitions 0/373 dead transitions. [2024-06-03 20:50:45,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 373 transitions, 6146 flow [2024-06-03 20:50:45,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:50:45,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:50:45,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-03 20:50:45,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-03 20:50:45,943 INFO L175 Difference]: Start difference. First operand has 277 places, 338 transitions, 4900 flow. Second operand 10 states and 238 transitions. [2024-06-03 20:50:45,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 373 transitions, 6146 flow [2024-06-03 20:50:47,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 373 transitions, 5876 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 20:50:47,438 INFO L231 Difference]: Finished difference. Result has 281 places, 345 transitions, 5099 flow [2024-06-03 20:50:47,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4637, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5099, PETRI_PLACES=281, PETRI_TRANSITIONS=345} [2024-06-03 20:50:47,438 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-03 20:50:47,438 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 345 transitions, 5099 flow [2024-06-03 20:50:47,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:47,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:47,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:47,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 20:50:47,439 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:47,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:47,439 INFO L85 PathProgramCache]: Analyzing trace with hash -861117415, now seen corresponding path program 10 times [2024-06-03 20:50:47,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:47,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029692873] [2024-06-03 20:50:47,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:47,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:47,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:47,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029692873] [2024-06-03 20:50:47,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029692873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:47,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:47,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:47,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693778150] [2024-06-03 20:50:47,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:47,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:47,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:47,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:47,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:47,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:47,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 345 transitions, 5099 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:47,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:47,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:47,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:48,922 INFO L124 PetriNetUnfolderBase]: 4305/7514 cut-off events. [2024-06-03 20:50:48,923 INFO L125 PetriNetUnfolderBase]: For 670038/670038 co-relation queries the response was YES. [2024-06-03 20:50:48,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50515 conditions, 7514 events. 4305/7514 cut-off events. For 670038/670038 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 54685 event pairs, 1481 based on Foata normal form. 2/7514 useless extension candidates. Maximal degree in co-relation 50382. Up to 6331 conditions per place. [2024-06-03 20:50:49,008 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 202 selfloop transitions, 158 changer transitions 1/368 dead transitions. [2024-06-03 20:50:49,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 368 transitions, 6523 flow [2024-06-03 20:50:49,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:50:49,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:50:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-03 20:50:49,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-03 20:50:49,009 INFO L175 Difference]: Start difference. First operand has 281 places, 345 transitions, 5099 flow. Second operand 9 states and 217 transitions. [2024-06-03 20:50:49,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 368 transitions, 6523 flow [2024-06-03 20:50:50,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 368 transitions, 6351 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:50:50,876 INFO L231 Difference]: Finished difference. Result has 284 places, 344 transitions, 5234 flow [2024-06-03 20:50:50,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4927, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5234, PETRI_PLACES=284, PETRI_TRANSITIONS=344} [2024-06-03 20:50:50,877 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-03 20:50:50,877 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 344 transitions, 5234 flow [2024-06-03 20:50:50,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:50,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:50,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:50,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 20:50:50,878 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:50,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:50,878 INFO L85 PathProgramCache]: Analyzing trace with hash 44193847, now seen corresponding path program 11 times [2024-06-03 20:50:50,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:50,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562750989] [2024-06-03 20:50:50,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:50,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:51,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:51,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562750989] [2024-06-03 20:50:51,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562750989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:51,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:51,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:51,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669705602] [2024-06-03 20:50:51,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:51,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:51,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:51,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:51,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:51,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:51,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 344 transitions, 5234 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:51,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:51,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:51,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:52,328 INFO L124 PetriNetUnfolderBase]: 4250/7415 cut-off events. [2024-06-03 20:50:52,329 INFO L125 PetriNetUnfolderBase]: For 680118/680118 co-relation queries the response was YES. [2024-06-03 20:50:52,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50145 conditions, 7415 events. 4250/7415 cut-off events. For 680118/680118 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 53802 event pairs, 1460 based on Foata normal form. 2/7416 useless extension candidates. Maximal degree in co-relation 50011. Up to 6756 conditions per place. [2024-06-03 20:50:52,420 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 320 selfloop transitions, 35 changer transitions 1/363 dead transitions. [2024-06-03 20:50:52,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 363 transitions, 5992 flow [2024-06-03 20:50:52,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:50:52,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:50:52,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-03 20:50:52,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-03 20:50:52,425 INFO L175 Difference]: Start difference. First operand has 284 places, 344 transitions, 5234 flow. Second operand 9 states and 198 transitions. [2024-06-03 20:50:52,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 363 transitions, 5992 flow [2024-06-03 20:50:54,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 363 transitions, 5457 flow, removed 21 selfloop flow, removed 11 redundant places. [2024-06-03 20:50:54,143 INFO L231 Difference]: Finished difference. Result has 282 places, 343 transitions, 4759 flow [2024-06-03 20:50:54,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4699, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4759, PETRI_PLACES=282, PETRI_TRANSITIONS=343} [2024-06-03 20:50:54,143 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-03 20:50:54,143 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 343 transitions, 4759 flow [2024-06-03 20:50:54,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:54,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:54,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:54,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 20:50:54,144 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:54,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:54,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1381618293, now seen corresponding path program 12 times [2024-06-03 20:50:54,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:54,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734921101] [2024-06-03 20:50:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:54,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:54,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:54,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:54,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734921101] [2024-06-03 20:50:54,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734921101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:54,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:54,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:54,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599108059] [2024-06-03 20:50:54,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:54,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:54,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:54,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:54,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:54,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:54,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 343 transitions, 4759 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:54,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:54,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:54,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:55,675 INFO L124 PetriNetUnfolderBase]: 4195/7316 cut-off events. [2024-06-03 20:50:55,675 INFO L125 PetriNetUnfolderBase]: For 683124/683124 co-relation queries the response was YES. [2024-06-03 20:50:55,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48975 conditions, 7316 events. 4195/7316 cut-off events. For 683124/683124 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 52914 event pairs, 1447 based on Foata normal form. 2/7316 useless extension candidates. Maximal degree in co-relation 48842. Up to 6149 conditions per place. [2024-06-03 20:50:55,748 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 204 selfloop transitions, 154 changer transitions 1/366 dead transitions. [2024-06-03 20:50:55,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 366 transitions, 6029 flow [2024-06-03 20:50:55,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:50:55,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:50:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-03 20:50:55,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2024-06-03 20:50:55,749 INFO L175 Difference]: Start difference. First operand has 282 places, 343 transitions, 4759 flow. Second operand 10 states and 232 transitions. [2024-06-03 20:50:55,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 366 transitions, 6029 flow [2024-06-03 20:50:57,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 366 transitions, 5872 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-03 20:50:57,049 INFO L231 Difference]: Finished difference. Result has 281 places, 342 transitions, 4904 flow [2024-06-03 20:50:57,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4602, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4904, PETRI_PLACES=281, PETRI_TRANSITIONS=342} [2024-06-03 20:50:57,050 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-03 20:50:57,050 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 342 transitions, 4904 flow [2024-06-03 20:50:57,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:57,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:57,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:57,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 20:50:57,051 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:57,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:57,051 INFO L85 PathProgramCache]: Analyzing trace with hash 281083762, now seen corresponding path program 1 times [2024-06-03 20:50:57,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:57,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402622382] [2024-06-03 20:50:57,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:57,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:57,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:57,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:57,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402622382] [2024-06-03 20:50:57,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402622382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:57,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:57,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:57,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016538779] [2024-06-03 20:50:57,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:57,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:57,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:57,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:57,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:57,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:57,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 342 transitions, 4904 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:57,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:57,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:57,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:58,655 INFO L124 PetriNetUnfolderBase]: 4557/7933 cut-off events. [2024-06-03 20:50:58,655 INFO L125 PetriNetUnfolderBase]: For 884588/884588 co-relation queries the response was YES. [2024-06-03 20:50:58,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56363 conditions, 7933 events. 4557/7933 cut-off events. For 884588/884588 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 58273 event pairs, 1376 based on Foata normal form. 12/7944 useless extension candidates. Maximal degree in co-relation 56229. Up to 6415 conditions per place. [2024-06-03 20:50:58,750 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 329 selfloop transitions, 54 changer transitions 0/390 dead transitions. [2024-06-03 20:50:58,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 390 transitions, 6412 flow [2024-06-03 20:50:58,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:58,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:58,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 20:50:58,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 20:50:58,751 INFO L175 Difference]: Start difference. First operand has 281 places, 342 transitions, 4904 flow. Second operand 8 states and 196 transitions. [2024-06-03 20:50:58,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 390 transitions, 6412 flow [2024-06-03 20:51:00,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 390 transitions, 5718 flow, removed 5 selfloop flow, removed 15 redundant places. [2024-06-03 20:51:00,860 INFO L231 Difference]: Finished difference. Result has 276 places, 351 transitions, 4540 flow [2024-06-03 20:51:00,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4210, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4540, PETRI_PLACES=276, PETRI_TRANSITIONS=351} [2024-06-03 20:51:00,861 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-03 20:51:00,861 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 351 transitions, 4540 flow [2024-06-03 20:51:00,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:00,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:00,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:00,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 20:51:00,862 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:00,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:00,862 INFO L85 PathProgramCache]: Analyzing trace with hash 184501814, now seen corresponding path program 2 times [2024-06-03 20:51:00,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:00,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492420649] [2024-06-03 20:51:00,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:00,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:00,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:01,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:01,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492420649] [2024-06-03 20:51:01,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492420649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:01,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:01,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:01,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191459886] [2024-06-03 20:51:01,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:01,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:01,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:01,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:01,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:01,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:01,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 351 transitions, 4540 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:01,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:01,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:01,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:02,621 INFO L124 PetriNetUnfolderBase]: 4677/8138 cut-off events. [2024-06-03 20:51:02,621 INFO L125 PetriNetUnfolderBase]: For 958446/958446 co-relation queries the response was YES. [2024-06-03 20:51:02,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58647 conditions, 8138 events. 4677/8138 cut-off events. For 958446/958446 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 59918 event pairs, 1569 based on Foata normal form. 18/8155 useless extension candidates. Maximal degree in co-relation 58511. Up to 6913 conditions per place. [2024-06-03 20:51:02,710 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 287 selfloop transitions, 98 changer transitions 0/392 dead transitions. [2024-06-03 20:51:02,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 392 transitions, 5782 flow [2024-06-03 20:51:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:51:02,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:51:02,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-03 20:51:02,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-03 20:51:02,711 INFO L175 Difference]: Start difference. First operand has 276 places, 351 transitions, 4540 flow. Second operand 10 states and 237 transitions. [2024-06-03 20:51:02,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 392 transitions, 5782 flow [2024-06-03 20:51:04,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 392 transitions, 5681 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-03 20:51:04,667 INFO L231 Difference]: Finished difference. Result has 284 places, 358 transitions, 4874 flow [2024-06-03 20:51:04,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4439, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4874, PETRI_PLACES=284, PETRI_TRANSITIONS=358} [2024-06-03 20:51:04,668 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-03 20:51:04,668 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 358 transitions, 4874 flow [2024-06-03 20:51:04,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:04,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:04,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:04,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 20:51:04,668 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:04,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:04,669 INFO L85 PathProgramCache]: Analyzing trace with hash -536439212, now seen corresponding path program 3 times [2024-06-03 20:51:04,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:04,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140069350] [2024-06-03 20:51:04,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:04,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:04,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:04,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140069350] [2024-06-03 20:51:04,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140069350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:04,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:04,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:04,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612305719] [2024-06-03 20:51:04,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:04,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:04,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:04,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:04,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:04,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:04,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 358 transitions, 4874 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:04,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:04,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:04,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:06,327 INFO L124 PetriNetUnfolderBase]: 4737/8201 cut-off events. [2024-06-03 20:51:06,327 INFO L125 PetriNetUnfolderBase]: For 989747/989747 co-relation queries the response was YES. [2024-06-03 20:51:06,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59721 conditions, 8201 events. 4737/8201 cut-off events. For 989747/989747 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 60159 event pairs, 1358 based on Foata normal form. 18/8218 useless extension candidates. Maximal degree in co-relation 59582. Up to 6731 conditions per place. [2024-06-03 20:51:06,437 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 283 selfloop transitions, 112 changer transitions 2/404 dead transitions. [2024-06-03 20:51:06,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 404 transitions, 6007 flow [2024-06-03 20:51:06,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:51:06,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:51:06,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-03 20:51:06,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 20:51:06,438 INFO L175 Difference]: Start difference. First operand has 284 places, 358 transitions, 4874 flow. Second operand 10 states and 245 transitions. [2024-06-03 20:51:06,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 404 transitions, 6007 flow [2024-06-03 20:51:08,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 404 transitions, 5795 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-03 20:51:08,540 INFO L231 Difference]: Finished difference. Result has 288 places, 359 transitions, 4922 flow [2024-06-03 20:51:08,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4662, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4922, PETRI_PLACES=288, PETRI_TRANSITIONS=359} [2024-06-03 20:51:08,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-03 20:51:08,540 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 359 transitions, 4922 flow [2024-06-03 20:51:08,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:08,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:08,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:08,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 20:51:08,541 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:08,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:08,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1165023966, now seen corresponding path program 4 times [2024-06-03 20:51:08,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:08,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368054708] [2024-06-03 20:51:08,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:08,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:08,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:08,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:08,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368054708] [2024-06-03 20:51:08,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368054708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:08,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:08,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:08,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768214415] [2024-06-03 20:51:08,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:08,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:08,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:08,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:08,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:08,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:08,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 359 transitions, 4922 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:08,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:08,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:08,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:10,263 INFO L124 PetriNetUnfolderBase]: 4797/8308 cut-off events. [2024-06-03 20:51:10,264 INFO L125 PetriNetUnfolderBase]: For 1031963/1031963 co-relation queries the response was YES. [2024-06-03 20:51:10,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60446 conditions, 8308 events. 4797/8308 cut-off events. For 1031963/1031963 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 61179 event pairs, 1605 based on Foata normal form. 24/8331 useless extension candidates. Maximal degree in co-relation 60305. Up to 7334 conditions per place. [2024-06-03 20:51:10,363 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 291 selfloop transitions, 98 changer transitions 2/398 dead transitions. [2024-06-03 20:51:10,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 398 transitions, 5855 flow [2024-06-03 20:51:10,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:51:10,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:51:10,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-03 20:51:10,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-03 20:51:10,364 INFO L175 Difference]: Start difference. First operand has 288 places, 359 transitions, 4922 flow. Second operand 10 states and 237 transitions. [2024-06-03 20:51:10,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 398 transitions, 5855 flow [2024-06-03 20:51:12,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 398 transitions, 5653 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 20:51:12,745 INFO L231 Difference]: Finished difference. Result has 291 places, 360 transitions, 4952 flow [2024-06-03 20:51:12,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4722, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4952, PETRI_PLACES=291, PETRI_TRANSITIONS=360} [2024-06-03 20:51:12,746 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-03 20:51:12,746 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 360 transitions, 4952 flow [2024-06-03 20:51:12,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:12,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:12,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:12,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 20:51:12,747 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:12,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:12,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1979178926, now seen corresponding path program 5 times [2024-06-03 20:51:12,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:12,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781095001] [2024-06-03 20:51:12,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:12,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:12,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:12,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781095001] [2024-06-03 20:51:12,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781095001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:12,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:12,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:12,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083594027] [2024-06-03 20:51:12,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:12,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:12,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:12,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:12,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:12,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:12,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 360 transitions, 4952 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:12,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:12,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:12,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:14,339 INFO L124 PetriNetUnfolderBase]: 4746/8221 cut-off events. [2024-06-03 20:51:14,340 INFO L125 PetriNetUnfolderBase]: For 992416/992416 co-relation queries the response was YES. [2024-06-03 20:51:14,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58745 conditions, 8221 events. 4746/8221 cut-off events. For 992416/992416 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 60398 event pairs, 1581 based on Foata normal form. 24/8244 useless extension candidates. Maximal degree in co-relation 58603. Up to 7260 conditions per place. [2024-06-03 20:51:14,443 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 293 selfloop transitions, 90 changer transitions 1/391 dead transitions. [2024-06-03 20:51:14,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 391 transitions, 5838 flow [2024-06-03 20:51:14,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:51:14,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:51:14,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-03 20:51:14,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608465608465608 [2024-06-03 20:51:14,444 INFO L175 Difference]: Start difference. First operand has 291 places, 360 transitions, 4952 flow. Second operand 9 states and 212 transitions. [2024-06-03 20:51:14,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 391 transitions, 5838 flow [2024-06-03 20:51:16,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 391 transitions, 5636 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 20:51:16,772 INFO L231 Difference]: Finished difference. Result has 292 places, 361 transitions, 4960 flow [2024-06-03 20:51:16,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4750, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4960, PETRI_PLACES=292, PETRI_TRANSITIONS=361} [2024-06-03 20:51:16,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-03 20:51:16,772 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 361 transitions, 4960 flow [2024-06-03 20:51:16,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:16,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:16,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:16,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 20:51:16,773 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:16,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:16,773 INFO L85 PathProgramCache]: Analyzing trace with hash -530713760, now seen corresponding path program 1 times [2024-06-03 20:51:16,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:16,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039123408] [2024-06-03 20:51:16,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:16,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:16,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:16,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039123408] [2024-06-03 20:51:16,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039123408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:16,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:16,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:16,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179921462] [2024-06-03 20:51:16,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:16,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:16,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:16,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:16,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:17,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:17,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 361 transitions, 4960 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:17,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:17,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:17,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:18,406 INFO L124 PetriNetUnfolderBase]: 4729/8222 cut-off events. [2024-06-03 20:51:18,406 INFO L125 PetriNetUnfolderBase]: For 965439/965439 co-relation queries the response was YES. [2024-06-03 20:51:18,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58349 conditions, 8222 events. 4729/8222 cut-off events. For 965439/965439 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 60556 event pairs, 1566 based on Foata normal form. 18/8239 useless extension candidates. Maximal degree in co-relation 58206. Up to 6965 conditions per place. [2024-06-03 20:51:18,510 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 290 selfloop transitions, 99 changer transitions 0/396 dead transitions. [2024-06-03 20:51:18,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 396 transitions, 5911 flow [2024-06-03 20:51:18,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:51:18,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:51:18,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-03 20:51:18,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-03 20:51:18,511 INFO L175 Difference]: Start difference. First operand has 292 places, 361 transitions, 4960 flow. Second operand 9 states and 215 transitions. [2024-06-03 20:51:18,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 396 transitions, 5911 flow [2024-06-03 20:51:21,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 396 transitions, 5721 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 20:51:21,204 INFO L231 Difference]: Finished difference. Result has 294 places, 364 transitions, 5060 flow [2024-06-03 20:51:21,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4770, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5060, PETRI_PLACES=294, PETRI_TRANSITIONS=364} [2024-06-03 20:51:21,204 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-03 20:51:21,204 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 364 transitions, 5060 flow [2024-06-03 20:51:21,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:21,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:21,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:21,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 20:51:21,205 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:21,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:21,205 INFO L85 PathProgramCache]: Analyzing trace with hash -260727934, now seen corresponding path program 6 times [2024-06-03 20:51:21,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:21,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804993118] [2024-06-03 20:51:21,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:21,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:21,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:21,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804993118] [2024-06-03 20:51:21,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804993118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:21,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:21,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:21,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669085228] [2024-06-03 20:51:21,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:21,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:21,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:21,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:21,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:21,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:21,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 364 transitions, 5060 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:21,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:21,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:21,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:22,742 INFO L124 PetriNetUnfolderBase]: 4661/8066 cut-off events. [2024-06-03 20:51:22,742 INFO L125 PetriNetUnfolderBase]: For 913563/913563 co-relation queries the response was YES. [2024-06-03 20:51:22,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56716 conditions, 8066 events. 4661/8066 cut-off events. For 913563/913563 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 58892 event pairs, 1536 based on Foata normal form. 16/8080 useless extension candidates. Maximal degree in co-relation 56572. Up to 7161 conditions per place. [2024-06-03 20:51:22,843 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 292 selfloop transitions, 85 changer transitions 2/386 dead transitions. [2024-06-03 20:51:22,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 386 transitions, 5882 flow [2024-06-03 20:51:22,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:51:22,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:51:22,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-03 20:51:22,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-03 20:51:22,844 INFO L175 Difference]: Start difference. First operand has 294 places, 364 transitions, 5060 flow. Second operand 8 states and 187 transitions. [2024-06-03 20:51:22,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 386 transitions, 5882 flow [2024-06-03 20:51:25,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 386 transitions, 5623 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-03 20:51:25,338 INFO L231 Difference]: Finished difference. Result has 295 places, 362 transitions, 4948 flow [2024-06-03 20:51:25,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4801, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4948, PETRI_PLACES=295, PETRI_TRANSITIONS=362} [2024-06-03 20:51:25,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-03 20:51:25,338 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 362 transitions, 4948 flow [2024-06-03 20:51:25,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:25,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:25,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:25,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 20:51:25,339 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:25,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:25,339 INFO L85 PathProgramCache]: Analyzing trace with hash -4012222, now seen corresponding path program 2 times [2024-06-03 20:51:25,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:25,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225186649] [2024-06-03 20:51:25,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:25,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:25,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:25,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225186649] [2024-06-03 20:51:25,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225186649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:25,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:25,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:25,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819395391] [2024-06-03 20:51:25,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:25,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:25,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:25,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:25,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:25,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:25,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 362 transitions, 4948 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:25,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:25,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:25,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:26,918 INFO L124 PetriNetUnfolderBase]: 4589/7950 cut-off events. [2024-06-03 20:51:26,918 INFO L125 PetriNetUnfolderBase]: For 914215/914215 co-relation queries the response was YES. [2024-06-03 20:51:26,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56119 conditions, 7950 events. 4589/7950 cut-off events. For 914215/914215 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 57965 event pairs, 1482 based on Foata normal form. 12/7960 useless extension candidates. Maximal degree in co-relation 55974. Up to 6989 conditions per place. [2024-06-03 20:51:27,016 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 293 selfloop transitions, 89 changer transitions 0/389 dead transitions. [2024-06-03 20:51:27,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 389 transitions, 5846 flow [2024-06-03 20:51:27,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:51:27,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:51:27,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 20:51:27,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-03 20:51:27,017 INFO L175 Difference]: Start difference. First operand has 295 places, 362 transitions, 4948 flow. Second operand 8 states and 191 transitions. [2024-06-03 20:51:27,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 389 transitions, 5846 flow [2024-06-03 20:51:29,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 389 transitions, 5593 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 20:51:29,328 INFO L231 Difference]: Finished difference. Result has 295 places, 364 transitions, 4940 flow [2024-06-03 20:51:29,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4695, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4940, PETRI_PLACES=295, PETRI_TRANSITIONS=364} [2024-06-03 20:51:29,329 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-03 20:51:29,329 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 364 transitions, 4940 flow [2024-06-03 20:51:29,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:29,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:29,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:29,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 20:51:29,330 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:29,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:29,330 INFO L85 PathProgramCache]: Analyzing trace with hash 5184548, now seen corresponding path program 3 times [2024-06-03 20:51:29,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:29,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827207461] [2024-06-03 20:51:29,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:29,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:29,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:29,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827207461] [2024-06-03 20:51:29,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827207461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:29,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:29,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:29,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305887137] [2024-06-03 20:51:29,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:29,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:29,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:29,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:29,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:29,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:29,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 364 transitions, 4940 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:29,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:29,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:29,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:30,918 INFO L124 PetriNetUnfolderBase]: 4596/7959 cut-off events. [2024-06-03 20:51:30,918 INFO L125 PetriNetUnfolderBase]: For 906945/906945 co-relation queries the response was YES. [2024-06-03 20:51:30,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55716 conditions, 7959 events. 4596/7959 cut-off events. For 906945/906945 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 57997 event pairs, 1471 based on Foata normal form. 12/7969 useless extension candidates. Maximal degree in co-relation 55570. Up to 6550 conditions per place. [2024-06-03 20:51:31,021 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 276 selfloop transitions, 108 changer transitions 0/391 dead transitions. [2024-06-03 20:51:31,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 391 transitions, 5814 flow [2024-06-03 20:51:31,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:51:31,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:51:31,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 20:51:31,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-03 20:51:31,022 INFO L175 Difference]: Start difference. First operand has 295 places, 364 transitions, 4940 flow. Second operand 8 states and 191 transitions. [2024-06-03 20:51:31,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 391 transitions, 5814 flow [2024-06-03 20:51:33,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 391 transitions, 5589 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 20:51:33,112 INFO L231 Difference]: Finished difference. Result has 297 places, 365 transitions, 4966 flow [2024-06-03 20:51:33,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4715, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4966, PETRI_PLACES=297, PETRI_TRANSITIONS=365} [2024-06-03 20:51:33,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-03 20:51:33,112 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 365 transitions, 4966 flow [2024-06-03 20:51:33,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:33,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:33,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:33,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 20:51:33,112 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:33,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:33,113 INFO L85 PathProgramCache]: Analyzing trace with hash -2118986272, now seen corresponding path program 1 times [2024-06-03 20:51:33,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:33,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361693388] [2024-06-03 20:51:33,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:33,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:33,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:33,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361693388] [2024-06-03 20:51:33,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361693388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:33,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:33,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:33,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689760852] [2024-06-03 20:51:33,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:33,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:33,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:33,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:33,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:33,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:33,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 365 transitions, 4966 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:33,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:33,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:33,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:34,661 INFO L124 PetriNetUnfolderBase]: 4622/8005 cut-off events. [2024-06-03 20:51:34,661 INFO L125 PetriNetUnfolderBase]: For 888921/888921 co-relation queries the response was YES. [2024-06-03 20:51:34,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56361 conditions, 8005 events. 4622/8005 cut-off events. For 888921/888921 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58293 event pairs, 1482 based on Foata normal form. 2/8006 useless extension candidates. Maximal degree in co-relation 56214. Up to 7053 conditions per place. [2024-06-03 20:51:34,759 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 274 selfloop transitions, 115 changer transitions 0/396 dead transitions. [2024-06-03 20:51:34,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 396 transitions, 6130 flow [2024-06-03 20:51:34,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:34,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:34,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 20:51:34,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-03 20:51:34,760 INFO L175 Difference]: Start difference. First operand has 297 places, 365 transitions, 4966 flow. Second operand 7 states and 176 transitions. [2024-06-03 20:51:34,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 396 transitions, 6130 flow [2024-06-03 20:51:37,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 396 transitions, 5786 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-03 20:51:37,292 INFO L231 Difference]: Finished difference. Result has 297 places, 374 transitions, 5099 flow [2024-06-03 20:51:37,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4622, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5099, PETRI_PLACES=297, PETRI_TRANSITIONS=374} [2024-06-03 20:51:37,292 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-03 20:51:37,292 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 374 transitions, 5099 flow [2024-06-03 20:51:37,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:37,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:37,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:37,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 20:51:37,293 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:37,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:37,294 INFO L85 PathProgramCache]: Analyzing trace with hash -2114338132, now seen corresponding path program 2 times [2024-06-03 20:51:37,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:37,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798056971] [2024-06-03 20:51:37,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:37,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:37,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:37,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798056971] [2024-06-03 20:51:37,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798056971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:37,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:37,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:37,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707639469] [2024-06-03 20:51:37,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:37,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:37,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:37,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:37,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:37,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:37,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 374 transitions, 5099 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:37,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:37,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:37,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:38,881 INFO L124 PetriNetUnfolderBase]: 4627/8010 cut-off events. [2024-06-03 20:51:38,881 INFO L125 PetriNetUnfolderBase]: For 899390/899390 co-relation queries the response was YES. [2024-06-03 20:51:38,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56122 conditions, 8010 events. 4627/8010 cut-off events. For 899390/899390 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58481 event pairs, 1481 based on Foata normal form. 1/8010 useless extension candidates. Maximal degree in co-relation 55975. Up to 7057 conditions per place. [2024-06-03 20:51:38,979 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 250 selfloop transitions, 147 changer transitions 0/404 dead transitions. [2024-06-03 20:51:38,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 404 transitions, 6399 flow [2024-06-03 20:51:38,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:51:38,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:51:38,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 251 transitions. [2024-06-03 20:51:38,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432900432900433 [2024-06-03 20:51:38,980 INFO L175 Difference]: Start difference. First operand has 297 places, 374 transitions, 5099 flow. Second operand 11 states and 251 transitions. [2024-06-03 20:51:38,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 404 transitions, 6399 flow [2024-06-03 20:51:41,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 404 transitions, 6221 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 20:51:41,792 INFO L231 Difference]: Finished difference. Result has 303 places, 378 transitions, 5300 flow [2024-06-03 20:51:41,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4927, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5300, PETRI_PLACES=303, PETRI_TRANSITIONS=378} [2024-06-03 20:51:41,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-03 20:51:41,793 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 378 transitions, 5300 flow [2024-06-03 20:51:41,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:41,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:41,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:41,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 20:51:41,793 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:41,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:41,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1941854752, now seen corresponding path program 3 times [2024-06-03 20:51:41,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:41,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109015984] [2024-06-03 20:51:41,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:41,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:41,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:41,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109015984] [2024-06-03 20:51:41,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109015984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:41,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:41,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:41,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689020075] [2024-06-03 20:51:41,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:41,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:41,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:41,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:41,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:42,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:42,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 378 transitions, 5300 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:42,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:42,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:42,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:43,381 INFO L124 PetriNetUnfolderBase]: 4624/8006 cut-off events. [2024-06-03 20:51:43,381 INFO L125 PetriNetUnfolderBase]: For 895563/895563 co-relation queries the response was YES. [2024-06-03 20:51:43,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56098 conditions, 8006 events. 4624/8006 cut-off events. For 895563/895563 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58314 event pairs, 1481 based on Foata normal form. 1/8006 useless extension candidates. Maximal degree in co-relation 55951. Up to 7055 conditions per place. [2024-06-03 20:51:43,480 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 261 selfloop transitions, 134 changer transitions 0/402 dead transitions. [2024-06-03 20:51:43,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 402 transitions, 6336 flow [2024-06-03 20:51:43,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:51:43,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:51:43,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-03 20:51:43,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-03 20:51:43,481 INFO L175 Difference]: Start difference. First operand has 303 places, 378 transitions, 5300 flow. Second operand 10 states and 231 transitions. [2024-06-03 20:51:43,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 402 transitions, 6336 flow [2024-06-03 20:51:45,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 402 transitions, 6187 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-03 20:51:45,804 INFO L231 Difference]: Finished difference. Result has 306 places, 378 transitions, 5440 flow [2024-06-03 20:51:45,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5153, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5440, PETRI_PLACES=306, PETRI_TRANSITIONS=378} [2024-06-03 20:51:45,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-03 20:51:45,805 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 378 transitions, 5440 flow [2024-06-03 20:51:45,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:45,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:45,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:45,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 20:51:45,805 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:45,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:45,806 INFO L85 PathProgramCache]: Analyzing trace with hash -2000081440, now seen corresponding path program 4 times [2024-06-03 20:51:45,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:45,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062060005] [2024-06-03 20:51:45,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:45,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:45,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:45,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:45,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062060005] [2024-06-03 20:51:45,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062060005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:45,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:45,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:45,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277709019] [2024-06-03 20:51:45,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:45,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:45,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:45,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:45,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:46,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:46,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 378 transitions, 5440 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:46,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:46,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:46,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:47,336 INFO L124 PetriNetUnfolderBase]: 4634/8024 cut-off events. [2024-06-03 20:51:47,336 INFO L125 PetriNetUnfolderBase]: For 901534/901534 co-relation queries the response was YES. [2024-06-03 20:51:47,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56565 conditions, 8024 events. 4634/8024 cut-off events. For 901534/901534 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58488 event pairs, 1481 based on Foata normal form. 2/8025 useless extension candidates. Maximal degree in co-relation 56417. Up to 6828 conditions per place. [2024-06-03 20:51:47,433 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 254 selfloop transitions, 151 changer transitions 0/412 dead transitions. [2024-06-03 20:51:47,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 412 transitions, 6772 flow [2024-06-03 20:51:47,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:51:47,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:51:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-03 20:51:47,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-03 20:51:47,434 INFO L175 Difference]: Start difference. First operand has 306 places, 378 transitions, 5440 flow. Second operand 9 states and 219 transitions. [2024-06-03 20:51:47,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 412 transitions, 6772 flow [2024-06-03 20:51:50,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 412 transitions, 6390 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-03 20:51:50,724 INFO L231 Difference]: Finished difference. Result has 304 places, 382 transitions, 5446 flow [2024-06-03 20:51:50,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5062, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5446, PETRI_PLACES=304, PETRI_TRANSITIONS=382} [2024-06-03 20:51:50,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-03 20:51:50,724 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 382 transitions, 5446 flow [2024-06-03 20:51:50,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:50,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:50,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:50,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 20:51:50,725 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:50,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:50,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1675340320, now seen corresponding path program 5 times [2024-06-03 20:51:50,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:50,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911934052] [2024-06-03 20:51:50,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:50,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:50,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:50,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911934052] [2024-06-03 20:51:50,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911934052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:50,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:50,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:50,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046699682] [2024-06-03 20:51:50,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:50,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:50,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:50,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:50,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:50,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:50,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 382 transitions, 5446 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:50,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:50,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:50,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:52,318 INFO L124 PetriNetUnfolderBase]: 4644/8042 cut-off events. [2024-06-03 20:51:52,318 INFO L125 PetriNetUnfolderBase]: For 901552/901552 co-relation queries the response was YES. [2024-06-03 20:51:52,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56771 conditions, 8042 events. 4644/8042 cut-off events. For 901552/901552 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58604 event pairs, 1481 based on Foata normal form. 2/8043 useless extension candidates. Maximal degree in co-relation 56623. Up to 6838 conditions per place. [2024-06-03 20:51:52,416 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 160 changer transitions 0/414 dead transitions. [2024-06-03 20:51:52,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 414 transitions, 6784 flow [2024-06-03 20:51:52,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:51:52,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:51:52,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-03 20:51:52,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-03 20:51:52,417 INFO L175 Difference]: Start difference. First operand has 304 places, 382 transitions, 5446 flow. Second operand 10 states and 237 transitions. [2024-06-03 20:51:52,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 414 transitions, 6784 flow [2024-06-03 20:51:54,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 414 transitions, 6471 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-03 20:51:54,868 INFO L231 Difference]: Finished difference. Result has 308 places, 386 transitions, 5542 flow [2024-06-03 20:51:54,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5146, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5542, PETRI_PLACES=308, PETRI_TRANSITIONS=386} [2024-06-03 20:51:54,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-03 20:51:54,869 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 386 transitions, 5542 flow [2024-06-03 20:51:54,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:54,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:54,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:54,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 20:51:54,869 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:54,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:54,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1085911392, now seen corresponding path program 6 times [2024-06-03 20:51:54,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:54,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326321416] [2024-06-03 20:51:54,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:54,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:54,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:55,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:55,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326321416] [2024-06-03 20:51:55,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326321416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:55,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:55,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:55,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021892223] [2024-06-03 20:51:55,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:55,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:55,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:55,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:55,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:55,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:55,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 386 transitions, 5542 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:55,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:55,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:55,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:56,530 INFO L124 PetriNetUnfolderBase]: 4638/8034 cut-off events. [2024-06-03 20:51:56,530 INFO L125 PetriNetUnfolderBase]: For 912130/912130 co-relation queries the response was YES. [2024-06-03 20:51:56,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56537 conditions, 8034 events. 4638/8034 cut-off events. For 912130/912130 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58558 event pairs, 1481 based on Foata normal form. 2/8035 useless extension candidates. Maximal degree in co-relation 56389. Up to 6833 conditions per place. [2024-06-03 20:51:56,634 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 242 selfloop transitions, 164 changer transitions 0/413 dead transitions. [2024-06-03 20:51:56,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 413 transitions, 6610 flow [2024-06-03 20:51:56,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:51:56,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:51:56,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-03 20:51:56,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-06-03 20:51:56,635 INFO L175 Difference]: Start difference. First operand has 308 places, 386 transitions, 5542 flow. Second operand 10 states and 236 transitions. [2024-06-03 20:51:56,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 413 transitions, 6610 flow [2024-06-03 20:52:00,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 413 transitions, 6267 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-03 20:52:00,015 INFO L231 Difference]: Finished difference. Result has 311 places, 386 transitions, 5535 flow [2024-06-03 20:52:00,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5199, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5535, PETRI_PLACES=311, PETRI_TRANSITIONS=386} [2024-06-03 20:52:00,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-03 20:52:00,016 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 386 transitions, 5535 flow [2024-06-03 20:52:00,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:00,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:00,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:00,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 20:52:00,017 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:00,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:00,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1272612956, now seen corresponding path program 7 times [2024-06-03 20:52:00,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:00,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913788675] [2024-06-03 20:52:00,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:00,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:00,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:00,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913788675] [2024-06-03 20:52:00,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913788675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:00,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:00,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:52:00,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195988831] [2024-06-03 20:52:00,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:00,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:52:00,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:00,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:52:00,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:52:00,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:00,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 386 transitions, 5535 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:00,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:00,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:00,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:01,530 INFO L124 PetriNetUnfolderBase]: 4643/8042 cut-off events. [2024-06-03 20:52:01,530 INFO L125 PetriNetUnfolderBase]: For 925822/925822 co-relation queries the response was YES. [2024-06-03 20:52:01,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56778 conditions, 8042 events. 4643/8042 cut-off events. For 925822/925822 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58658 event pairs, 1489 based on Foata normal form. 1/8041 useless extension candidates. Maximal degree in co-relation 56629. Up to 6837 conditions per place. [2024-06-03 20:52:01,631 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 210 selfloop transitions, 193 changer transitions 0/410 dead transitions. [2024-06-03 20:52:01,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 410 transitions, 6823 flow [2024-06-03 20:52:01,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:52:01,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:52:01,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-03 20:52:01,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608465608465608 [2024-06-03 20:52:01,632 INFO L175 Difference]: Start difference. First operand has 311 places, 386 transitions, 5535 flow. Second operand 9 states and 212 transitions. [2024-06-03 20:52:01,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 410 transitions, 6823 flow [2024-06-03 20:52:04,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 410 transitions, 6337 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-03 20:52:04,915 INFO L231 Difference]: Finished difference. Result has 308 places, 389 transitions, 5489 flow [2024-06-03 20:52:04,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5057, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5489, PETRI_PLACES=308, PETRI_TRANSITIONS=389} [2024-06-03 20:52:04,915 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-03 20:52:04,916 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 389 transitions, 5489 flow [2024-06-03 20:52:04,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:04,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:04,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:04,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 20:52:04,916 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:04,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:04,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1634551884, now seen corresponding path program 8 times [2024-06-03 20:52:04,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:04,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999494246] [2024-06-03 20:52:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:04,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:05,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:05,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999494246] [2024-06-03 20:52:05,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999494246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:05,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:05,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:52:05,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851964536] [2024-06-03 20:52:05,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:05,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:52:05,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:05,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:52:05,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:52:05,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:05,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 389 transitions, 5489 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:05,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:05,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:05,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:06,511 INFO L124 PetriNetUnfolderBase]: 4648/8055 cut-off events. [2024-06-03 20:52:06,512 INFO L125 PetriNetUnfolderBase]: For 945087/945087 co-relation queries the response was YES. [2024-06-03 20:52:06,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56836 conditions, 8055 events. 4648/8055 cut-off events. For 945087/945087 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 58792 event pairs, 1493 based on Foata normal form. 1/8054 useless extension candidates. Maximal degree in co-relation 56688. Up to 6841 conditions per place. [2024-06-03 20:52:06,615 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 221 selfloop transitions, 186 changer transitions 0/414 dead transitions. [2024-06-03 20:52:06,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 414 transitions, 6789 flow [2024-06-03 20:52:06,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:52:06,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:52:06,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-03 20:52:06,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:52:06,617 INFO L175 Difference]: Start difference. First operand has 308 places, 389 transitions, 5489 flow. Second operand 10 states and 230 transitions. [2024-06-03 20:52:06,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 414 transitions, 6789 flow [2024-06-03 20:52:09,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 414 transitions, 6348 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 20:52:09,704 INFO L231 Difference]: Finished difference. Result has 311 places, 392 transitions, 5473 flow [2024-06-03 20:52:09,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5056, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5473, PETRI_PLACES=311, PETRI_TRANSITIONS=392} [2024-06-03 20:52:09,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-03 20:52:09,705 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 392 transitions, 5473 flow [2024-06-03 20:52:09,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:09,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:09,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:09,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 20:52:09,705 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:09,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:09,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1633743624, now seen corresponding path program 9 times [2024-06-03 20:52:09,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:09,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131811326] [2024-06-03 20:52:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:09,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:09,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:09,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131811326] [2024-06-03 20:52:09,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131811326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:09,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:09,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:52:09,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201369510] [2024-06-03 20:52:09,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:09,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:52:09,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:09,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:52:09,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:52:09,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:09,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 392 transitions, 5473 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:09,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:09,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:09,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:11,375 INFO L124 PetriNetUnfolderBase]: 4645/8047 cut-off events. [2024-06-03 20:52:11,375 INFO L125 PetriNetUnfolderBase]: For 957276/957276 co-relation queries the response was YES. [2024-06-03 20:52:11,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56867 conditions, 8047 events. 4645/8047 cut-off events. For 957276/957276 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58678 event pairs, 1489 based on Foata normal form. 1/8046 useless extension candidates. Maximal degree in co-relation 56718. Up to 6839 conditions per place. [2024-06-03 20:52:11,482 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 222 selfloop transitions, 184 changer transitions 0/413 dead transitions. [2024-06-03 20:52:11,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 413 transitions, 6531 flow [2024-06-03 20:52:11,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:52:11,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:52:11,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-03 20:52:11,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-03 20:52:11,483 INFO L175 Difference]: Start difference. First operand has 311 places, 392 transitions, 5473 flow. Second operand 10 states and 228 transitions. [2024-06-03 20:52:11,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 413 transitions, 6531 flow [2024-06-03 20:52:14,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 413 transitions, 6052 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-03 20:52:14,704 INFO L231 Difference]: Finished difference. Result has 312 places, 392 transitions, 5370 flow [2024-06-03 20:52:14,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4994, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5370, PETRI_PLACES=312, PETRI_TRANSITIONS=392} [2024-06-03 20:52:14,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-03 20:52:14,705 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 392 transitions, 5370 flow [2024-06-03 20:52:14,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:14,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:14,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:14,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 20:52:14,705 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:14,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:14,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1618226520, now seen corresponding path program 1 times [2024-06-03 20:52:14,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:14,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556912395] [2024-06-03 20:52:14,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:14,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:14,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:14,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556912395] [2024-06-03 20:52:14,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556912395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:14,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:14,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:52:14,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169404743] [2024-06-03 20:52:14,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:14,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:52:14,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:14,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:52:14,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:52:14,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:14,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 392 transitions, 5370 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:14,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:14,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:14,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:16,319 INFO L124 PetriNetUnfolderBase]: 4632/8029 cut-off events. [2024-06-03 20:52:16,319 INFO L125 PetriNetUnfolderBase]: For 972086/972086 co-relation queries the response was YES. [2024-06-03 20:52:16,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56283 conditions, 8029 events. 4632/8029 cut-off events. For 972086/972086 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 58712 event pairs, 1307 based on Foata normal form. 6/8034 useless extension candidates. Maximal degree in co-relation 56133. Up to 7087 conditions per place. [2024-06-03 20:52:16,421 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 378 selfloop transitions, 37 changer transitions 0/422 dead transitions. [2024-06-03 20:52:16,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 422 transitions, 6518 flow [2024-06-03 20:52:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:16,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:16,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:52:16,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-03 20:52:16,422 INFO L175 Difference]: Start difference. First operand has 312 places, 392 transitions, 5370 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:52:16,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 422 transitions, 6518 flow [2024-06-03 20:52:19,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 422 transitions, 6051 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-03 20:52:19,692 INFO L231 Difference]: Finished difference. Result has 309 places, 392 transitions, 4981 flow [2024-06-03 20:52:19,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4903, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4981, PETRI_PLACES=309, PETRI_TRANSITIONS=392} [2024-06-03 20:52:19,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-03 20:52:19,693 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 392 transitions, 4981 flow [2024-06-03 20:52:19,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:19,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:19,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:19,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 20:52:19,693 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:19,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:19,693 INFO L85 PathProgramCache]: Analyzing trace with hash -535279930, now seen corresponding path program 2 times [2024-06-03 20:52:19,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:19,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582926004] [2024-06-03 20:52:19,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:19,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:19,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:19,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582926004] [2024-06-03 20:52:19,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582926004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:19,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:19,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:52:19,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356114990] [2024-06-03 20:52:19,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:19,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:52:19,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:19,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:52:19,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:52:19,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:19,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 392 transitions, 4981 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:19,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:19,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:19,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:21,352 INFO L124 PetriNetUnfolderBase]: 4619/8010 cut-off events. [2024-06-03 20:52:21,352 INFO L125 PetriNetUnfolderBase]: For 959853/959853 co-relation queries the response was YES. [2024-06-03 20:52:21,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55080 conditions, 8010 events. 4619/8010 cut-off events. For 959853/959853 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 58535 event pairs, 1398 based on Foata normal form. 6/8015 useless extension candidates. Maximal degree in co-relation 54930. Up to 7143 conditions per place. [2024-06-03 20:52:21,456 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 373 selfloop transitions, 38 changer transitions 0/418 dead transitions. [2024-06-03 20:52:21,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 418 transitions, 5913 flow [2024-06-03 20:52:21,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:52:21,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:52:21,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-03 20:52:21,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-03 20:52:21,457 INFO L175 Difference]: Start difference. First operand has 309 places, 392 transitions, 4981 flow. Second operand 8 states and 183 transitions. [2024-06-03 20:52:21,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 418 transitions, 5913 flow [2024-06-03 20:52:24,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 418 transitions, 5762 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 20:52:24,651 INFO L231 Difference]: Finished difference. Result has 310 places, 392 transitions, 4912 flow [2024-06-03 20:52:24,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4830, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4912, PETRI_PLACES=310, PETRI_TRANSITIONS=392} [2024-06-03 20:52:24,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-03 20:52:24,652 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 392 transitions, 4912 flow [2024-06-03 20:52:24,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:24,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:24,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:24,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 20:52:24,652 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:24,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:24,652 INFO L85 PathProgramCache]: Analyzing trace with hash -654797896, now seen corresponding path program 1 times [2024-06-03 20:52:24,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:24,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233176718] [2024-06-03 20:52:24,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:24,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:24,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:24,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233176718] [2024-06-03 20:52:24,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233176718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:24,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:24,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:52:24,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885463486] [2024-06-03 20:52:24,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:24,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:52:24,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:24,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:52:24,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:52:24,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:24,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 392 transitions, 4912 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:24,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:24,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:24,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:26,487 INFO L124 PetriNetUnfolderBase]: 4660/8061 cut-off events. [2024-06-03 20:52:26,487 INFO L125 PetriNetUnfolderBase]: For 987938/987938 co-relation queries the response was YES. [2024-06-03 20:52:26,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56004 conditions, 8061 events. 4660/8061 cut-off events. For 987938/987938 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 58836 event pairs, 1468 based on Foata normal form. 2/8054 useless extension candidates. Maximal degree in co-relation 55855. Up to 7109 conditions per place. [2024-06-03 20:52:26,573 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 326 selfloop transitions, 93 changer transitions 1/427 dead transitions. [2024-06-03 20:52:26,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 427 transitions, 6230 flow [2024-06-03 20:52:26,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:52:26,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:52:26,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-03 20:52:26,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-03 20:52:26,574 INFO L175 Difference]: Start difference. First operand has 310 places, 392 transitions, 4912 flow. Second operand 8 states and 198 transitions. [2024-06-03 20:52:26,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 427 transitions, 6230 flow [2024-06-03 20:52:29,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 427 transitions, 6134 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:52:29,739 INFO L231 Difference]: Finished difference. Result has 312 places, 396 transitions, 5172 flow [2024-06-03 20:52:29,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4816, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5172, PETRI_PLACES=312, PETRI_TRANSITIONS=396} [2024-06-03 20:52:29,740 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-03 20:52:29,740 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 396 transitions, 5172 flow [2024-06-03 20:52:29,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:29,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:29,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:29,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 20:52:29,741 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:29,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:29,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1790416350, now seen corresponding path program 2 times [2024-06-03 20:52:29,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:29,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221953984] [2024-06-03 20:52:29,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:29,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:29,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:29,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221953984] [2024-06-03 20:52:29,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221953984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:29,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:29,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:52:29,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138033616] [2024-06-03 20:52:29,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:29,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:52:29,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:29,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:52:29,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:52:29,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:29,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 396 transitions, 5172 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:29,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:29,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:29,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:31,297 INFO L124 PetriNetUnfolderBase]: 4648/8057 cut-off events. [2024-06-03 20:52:31,297 INFO L125 PetriNetUnfolderBase]: For 996018/996018 co-relation queries the response was YES. [2024-06-03 20:52:31,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56139 conditions, 8057 events. 4648/8057 cut-off events. For 996018/996018 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58857 event pairs, 1488 based on Foata normal form. 2/8055 useless extension candidates. Maximal degree in co-relation 55988. Up to 7194 conditions per place. [2024-06-03 20:52:31,397 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 321 selfloop transitions, 90 changer transitions 0/418 dead transitions. [2024-06-03 20:52:31,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 418 transitions, 6048 flow [2024-06-03 20:52:31,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:52:31,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:52:31,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-03 20:52:31,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-03 20:52:31,399 INFO L175 Difference]: Start difference. First operand has 312 places, 396 transitions, 5172 flow. Second operand 8 states and 190 transitions. [2024-06-03 20:52:31,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 418 transitions, 6048 flow [2024-06-03 20:52:35,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 418 transitions, 5852 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-03 20:52:35,222 INFO L231 Difference]: Finished difference. Result has 316 places, 396 transitions, 5161 flow [2024-06-03 20:52:35,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4976, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5161, PETRI_PLACES=316, PETRI_TRANSITIONS=396} [2024-06-03 20:52:35,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-03 20:52:35,223 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 396 transitions, 5161 flow [2024-06-03 20:52:35,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:35,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:35,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:35,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 20:52:35,223 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:35,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:35,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1180451288, now seen corresponding path program 3 times [2024-06-03 20:52:35,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:35,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769070722] [2024-06-03 20:52:35,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:35,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:35,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:35,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769070722] [2024-06-03 20:52:35,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769070722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:35,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:35,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:52:35,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111138084] [2024-06-03 20:52:35,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:35,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:52:35,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:35,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:52:35,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:52:35,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:35,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 396 transitions, 5161 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:35,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:35,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:35,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:37,327 INFO L124 PetriNetUnfolderBase]: 4774/8256 cut-off events. [2024-06-03 20:52:37,327 INFO L125 PetriNetUnfolderBase]: For 1125958/1125958 co-relation queries the response was YES. [2024-06-03 20:52:37,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59981 conditions, 8256 events. 4774/8256 cut-off events. For 1125958/1125958 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 60447 event pairs, 1495 based on Foata normal form. 2/8250 useless extension candidates. Maximal degree in co-relation 59828. Up to 7293 conditions per place. [2024-06-03 20:52:37,434 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 368 selfloop transitions, 55 changer transitions 0/430 dead transitions. [2024-06-03 20:52:37,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 430 transitions, 6502 flow [2024-06-03 20:52:37,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:52:37,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:52:37,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-03 20:52:37,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-03 20:52:37,435 INFO L175 Difference]: Start difference. First operand has 316 places, 396 transitions, 5161 flow. Second operand 8 states and 190 transitions. [2024-06-03 20:52:37,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 430 transitions, 6502 flow [2024-06-03 20:52:41,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 430 transitions, 6279 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-03 20:52:41,515 INFO L231 Difference]: Finished difference. Result has 319 places, 401 transitions, 5229 flow [2024-06-03 20:52:41,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4938, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5229, PETRI_PLACES=319, PETRI_TRANSITIONS=401} [2024-06-03 20:52:41,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-03 20:52:41,516 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 401 transitions, 5229 flow [2024-06-03 20:52:41,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:41,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:41,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:41,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 20:52:41,517 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:41,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:41,517 INFO L85 PathProgramCache]: Analyzing trace with hash 141814018, now seen corresponding path program 4 times [2024-06-03 20:52:41,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:41,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449071636] [2024-06-03 20:52:41,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:41,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:41,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:41,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449071636] [2024-06-03 20:52:41,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449071636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:41,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:41,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:52:41,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287866969] [2024-06-03 20:52:41,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:41,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:52:41,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:41,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:52:41,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:52:41,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:41,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 401 transitions, 5229 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:41,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:41,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:41,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:43,193 INFO L124 PetriNetUnfolderBase]: 4782/8291 cut-off events. [2024-06-03 20:52:43,193 INFO L125 PetriNetUnfolderBase]: For 1147395/1147395 co-relation queries the response was YES. [2024-06-03 20:52:43,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60503 conditions, 8291 events. 4782/8291 cut-off events. For 1147395/1147395 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 60910 event pairs, 1526 based on Foata normal form. 2/8290 useless extension candidates. Maximal degree in co-relation 60348. Up to 7396 conditions per place. [2024-06-03 20:52:43,301 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 338 selfloop transitions, 87 changer transitions 0/432 dead transitions. [2024-06-03 20:52:43,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 432 transitions, 6223 flow [2024-06-03 20:52:43,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:52:43,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:52:43,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-03 20:52:43,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2024-06-03 20:52:43,302 INFO L175 Difference]: Start difference. First operand has 319 places, 401 transitions, 5229 flow. Second operand 9 states and 214 transitions. [2024-06-03 20:52:43,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 432 transitions, 6223 flow [2024-06-03 20:52:46,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 432 transitions, 6113 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-03 20:52:46,963 INFO L231 Difference]: Finished difference. Result has 325 places, 403 transitions, 5374 flow [2024-06-03 20:52:46,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5127, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5374, PETRI_PLACES=325, PETRI_TRANSITIONS=403} [2024-06-03 20:52:46,964 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-03 20:52:46,964 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 403 transitions, 5374 flow [2024-06-03 20:52:46,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:46,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:46,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:46,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 20:52:46,965 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:46,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:46,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1333343512, now seen corresponding path program 5 times [2024-06-03 20:52:46,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:46,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959512050] [2024-06-03 20:52:46,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:46,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:47,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:47,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959512050] [2024-06-03 20:52:47,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959512050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:47,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:47,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:52:47,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615894077] [2024-06-03 20:52:47,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:47,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:52:47,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:47,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:52:47,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:52:47,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:47,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 403 transitions, 5374 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:47,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:47,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:47,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:48,683 INFO L124 PetriNetUnfolderBase]: 4882/8481 cut-off events. [2024-06-03 20:52:48,683 INFO L125 PetriNetUnfolderBase]: For 1261659/1261659 co-relation queries the response was YES. [2024-06-03 20:52:48,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63796 conditions, 8481 events. 4882/8481 cut-off events. For 1261659/1261659 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 62613 event pairs, 1308 based on Foata normal form. 2/8482 useless extension candidates. Maximal degree in co-relation 63640. Up to 6100 conditions per place. [2024-06-03 20:52:48,799 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 322 selfloop transitions, 123 changer transitions 0/452 dead transitions. [2024-06-03 20:52:48,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 452 transitions, 7038 flow [2024-06-03 20:52:48,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:52:48,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:52:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-03 20:52:48,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978835978835979 [2024-06-03 20:52:48,800 INFO L175 Difference]: Start difference. First operand has 325 places, 403 transitions, 5374 flow. Second operand 9 states and 226 transitions. [2024-06-03 20:52:48,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 452 transitions, 7038 flow [2024-06-03 20:52:52,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 452 transitions, 6821 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-03 20:52:52,816 INFO L231 Difference]: Finished difference. Result has 327 places, 407 transitions, 5535 flow [2024-06-03 20:52:52,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5157, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5535, PETRI_PLACES=327, PETRI_TRANSITIONS=407} [2024-06-03 20:52:52,817 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-03 20:52:52,817 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 407 transitions, 5535 flow [2024-06-03 20:52:52,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:52,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:52,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:52,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 20:52:52,818 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:52,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:52,818 INFO L85 PathProgramCache]: Analyzing trace with hash 663161784, now seen corresponding path program 6 times [2024-06-03 20:52:52,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:52,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166317890] [2024-06-03 20:52:52,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:52,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:53,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:53,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166317890] [2024-06-03 20:52:53,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166317890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:53,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:53,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:52:53,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522820227] [2024-06-03 20:52:53,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:53,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:52:53,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:53,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:52:53,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:52:53,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:53,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 407 transitions, 5535 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:53,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:53,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:53,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:54,856 INFO L124 PetriNetUnfolderBase]: 4877/8456 cut-off events. [2024-06-03 20:52:54,856 INFO L125 PetriNetUnfolderBase]: For 1301358/1301358 co-relation queries the response was YES. [2024-06-03 20:52:54,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64191 conditions, 8456 events. 4877/8456 cut-off events. For 1301358/1301358 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 62234 event pairs, 1363 based on Foata normal form. 8/8463 useless extension candidates. Maximal degree in co-relation 64034. Up to 6098 conditions per place. [2024-06-03 20:52:54,994 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 325 selfloop transitions, 117 changer transitions 0/449 dead transitions. [2024-06-03 20:52:54,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 449 transitions, 7037 flow [2024-06-03 20:52:54,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:52:54,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:52:54,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-03 20:52:54,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58994708994709 [2024-06-03 20:52:54,995 INFO L175 Difference]: Start difference. First operand has 327 places, 407 transitions, 5535 flow. Second operand 9 states and 223 transitions. [2024-06-03 20:52:54,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 449 transitions, 7037 flow [2024-06-03 20:53:00,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 449 transitions, 6807 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-03 20:53:00,415 INFO L231 Difference]: Finished difference. Result has 330 places, 408 transitions, 5579 flow [2024-06-03 20:53:00,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5305, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5579, PETRI_PLACES=330, PETRI_TRANSITIONS=408} [2024-06-03 20:53:00,415 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-03 20:53:00,416 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 408 transitions, 5579 flow [2024-06-03 20:53:00,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:00,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:00,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:00,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 20:53:00,416 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:00,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:00,416 INFO L85 PathProgramCache]: Analyzing trace with hash -895790152, now seen corresponding path program 7 times [2024-06-03 20:53:00,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:00,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231106143] [2024-06-03 20:53:00,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:00,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:00,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:00,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231106143] [2024-06-03 20:53:00,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231106143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:00,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:00,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:00,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079612081] [2024-06-03 20:53:00,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:00,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:00,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:00,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:00,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:00,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:00,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 408 transitions, 5579 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:00,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:00,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:00,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:02,356 INFO L124 PetriNetUnfolderBase]: 4849/8418 cut-off events. [2024-06-03 20:53:02,357 INFO L125 PetriNetUnfolderBase]: For 1277501/1277501 co-relation queries the response was YES. [2024-06-03 20:53:02,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62904 conditions, 8418 events. 4849/8418 cut-off events. For 1277501/1277501 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 62050 event pairs, 1555 based on Foata normal form. 12/8429 useless extension candidates. Maximal degree in co-relation 62747. Up to 7463 conditions per place. [2024-06-03 20:53:02,493 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 341 selfloop transitions, 91 changer transitions 0/439 dead transitions. [2024-06-03 20:53:02,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 439 transitions, 6548 flow [2024-06-03 20:53:02,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:53:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:53:02,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-03 20:53:02,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-03 20:53:02,494 INFO L175 Difference]: Start difference. First operand has 330 places, 408 transitions, 5579 flow. Second operand 10 states and 235 transitions. [2024-06-03 20:53:02,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 439 transitions, 6548 flow [2024-06-03 20:53:07,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 439 transitions, 6371 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 20:53:07,091 INFO L231 Difference]: Finished difference. Result has 334 places, 409 transitions, 5614 flow [2024-06-03 20:53:07,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5402, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5614, PETRI_PLACES=334, PETRI_TRANSITIONS=409} [2024-06-03 20:53:07,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-03 20:53:07,092 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 409 transitions, 5614 flow [2024-06-03 20:53:07,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:07,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:07,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:07,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 20:53:07,093 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:07,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:07,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1395241396, now seen corresponding path program 8 times [2024-06-03 20:53:07,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:07,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512351981] [2024-06-03 20:53:07,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:07,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:07,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:07,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512351981] [2024-06-03 20:53:07,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512351981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:07,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:07,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:07,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282029010] [2024-06-03 20:53:07,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:07,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:07,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:07,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:07,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:07,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:07,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 409 transitions, 5614 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:07,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:07,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:07,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:08,977 INFO L124 PetriNetUnfolderBase]: 4814/8355 cut-off events. [2024-06-03 20:53:08,977 INFO L125 PetriNetUnfolderBase]: For 1229905/1229905 co-relation queries the response was YES. [2024-06-03 20:53:09,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60997 conditions, 8355 events. 4814/8355 cut-off events. For 1229905/1229905 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 61470 event pairs, 1512 based on Foata normal form. 12/8366 useless extension candidates. Maximal degree in co-relation 60839. Up to 7126 conditions per place. [2024-06-03 20:53:09,082 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 335 selfloop transitions, 101 changer transitions 0/443 dead transitions. [2024-06-03 20:53:09,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 443 transitions, 6590 flow [2024-06-03 20:53:09,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:53:09,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:53:09,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-03 20:53:09,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-03 20:53:09,083 INFO L175 Difference]: Start difference. First operand has 334 places, 409 transitions, 5614 flow. Second operand 10 states and 238 transitions. [2024-06-03 20:53:09,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 443 transitions, 6590 flow [2024-06-03 20:53:13,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 443 transitions, 6305 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-03 20:53:13,589 INFO L231 Difference]: Finished difference. Result has 336 places, 409 transitions, 5539 flow [2024-06-03 20:53:13,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5329, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5539, PETRI_PLACES=336, PETRI_TRANSITIONS=409} [2024-06-03 20:53:13,590 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-03 20:53:13,590 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 409 transitions, 5539 flow [2024-06-03 20:53:13,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:13,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:13,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:13,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 20:53:13,590 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:13,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:13,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1435275574, now seen corresponding path program 1 times [2024-06-03 20:53:13,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:13,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740449439] [2024-06-03 20:53:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:13,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:13,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:13,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740449439] [2024-06-03 20:53:13,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740449439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:13,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:13,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:13,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133625839] [2024-06-03 20:53:13,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:13,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:13,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:13,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:13,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:13,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:13,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 409 transitions, 5539 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:13,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:13,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:13,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:15,404 INFO L124 PetriNetUnfolderBase]: 4804/8348 cut-off events. [2024-06-03 20:53:15,404 INFO L125 PetriNetUnfolderBase]: For 1180009/1180009 co-relation queries the response was YES. [2024-06-03 20:53:15,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60359 conditions, 8348 events. 4804/8348 cut-off events. For 1180009/1180009 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 61562 event pairs, 1544 based on Foata normal form. 4/8350 useless extension candidates. Maximal degree in co-relation 60200. Up to 7428 conditions per place. [2024-06-03 20:53:15,558 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 327 selfloop transitions, 99 changer transitions 0/433 dead transitions. [2024-06-03 20:53:15,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 433 transitions, 6547 flow [2024-06-03 20:53:15,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:53:15,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:53:15,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-03 20:53:15,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-03 20:53:15,560 INFO L175 Difference]: Start difference. First operand has 336 places, 409 transitions, 5539 flow. Second operand 10 states and 224 transitions. [2024-06-03 20:53:15,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 433 transitions, 6547 flow [2024-06-03 20:53:19,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 433 transitions, 6321 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-03 20:53:19,611 INFO L231 Difference]: Finished difference. Result has 337 places, 412 transitions, 5630 flow [2024-06-03 20:53:19,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5313, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5630, PETRI_PLACES=337, PETRI_TRANSITIONS=412} [2024-06-03 20:53:19,611 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-03 20:53:19,611 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 412 transitions, 5630 flow [2024-06-03 20:53:19,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:19,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:19,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:19,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 20:53:19,612 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:19,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:19,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1620371856, now seen corresponding path program 2 times [2024-06-03 20:53:19,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:19,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226238326] [2024-06-03 20:53:19,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:19,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:19,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:19,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226238326] [2024-06-03 20:53:19,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226238326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:19,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:19,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:19,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831641258] [2024-06-03 20:53:19,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:19,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:19,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:19,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:19,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:19,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:19,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 412 transitions, 5630 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:19,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:19,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:19,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:21,320 INFO L124 PetriNetUnfolderBase]: 4799/8341 cut-off events. [2024-06-03 20:53:21,320 INFO L125 PetriNetUnfolderBase]: For 1176042/1176042 co-relation queries the response was YES. [2024-06-03 20:53:21,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60162 conditions, 8341 events. 4799/8341 cut-off events. For 1176042/1176042 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 61541 event pairs, 1541 based on Foata normal form. 2/8341 useless extension candidates. Maximal degree in co-relation 60002. Up to 7427 conditions per place. [2024-06-03 20:53:21,431 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 327 selfloop transitions, 100 changer transitions 0/434 dead transitions. [2024-06-03 20:53:21,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 434 transitions, 6607 flow [2024-06-03 20:53:21,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:53:21,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:53:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-03 20:53:21,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:53:21,432 INFO L175 Difference]: Start difference. First operand has 337 places, 412 transitions, 5630 flow. Second operand 9 states and 207 transitions. [2024-06-03 20:53:21,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 434 transitions, 6607 flow [2024-06-03 20:53:24,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 434 transitions, 6326 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-03 20:53:24,990 INFO L231 Difference]: Finished difference. Result has 338 places, 414 transitions, 5633 flow [2024-06-03 20:53:24,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5349, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5633, PETRI_PLACES=338, PETRI_TRANSITIONS=414} [2024-06-03 20:53:24,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-03 20:53:24,991 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 414 transitions, 5633 flow [2024-06-03 20:53:24,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:24,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:24,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:24,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 20:53:24,992 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:24,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:24,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1317689678, now seen corresponding path program 3 times [2024-06-03 20:53:24,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:24,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122881189] [2024-06-03 20:53:24,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:24,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:25,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:25,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122881189] [2024-06-03 20:53:25,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122881189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:25,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:25,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:25,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022651854] [2024-06-03 20:53:25,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:25,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:25,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:25,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:25,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:25,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:25,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 414 transitions, 5633 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:25,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:25,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:25,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:26,730 INFO L124 PetriNetUnfolderBase]: 4789/8321 cut-off events. [2024-06-03 20:53:26,730 INFO L125 PetriNetUnfolderBase]: For 1184251/1184251 co-relation queries the response was YES. [2024-06-03 20:53:26,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59543 conditions, 8321 events. 4789/8321 cut-off events. For 1184251/1184251 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 61309 event pairs, 1529 based on Foata normal form. 4/8323 useless extension candidates. Maximal degree in co-relation 59382. Up to 7355 conditions per place. [2024-06-03 20:53:26,845 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 324 selfloop transitions, 108 changer transitions 0/439 dead transitions. [2024-06-03 20:53:26,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 439 transitions, 6654 flow [2024-06-03 20:53:26,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:53:26,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:53:26,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-03 20:53:26,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-03 20:53:26,846 INFO L175 Difference]: Start difference. First operand has 338 places, 414 transitions, 5633 flow. Second operand 10 states and 224 transitions. [2024-06-03 20:53:26,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 439 transitions, 6654 flow [2024-06-03 20:53:30,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 439 transitions, 6389 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-03 20:53:30,826 INFO L231 Difference]: Finished difference. Result has 341 places, 417 transitions, 5702 flow [2024-06-03 20:53:30,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5368, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5702, PETRI_PLACES=341, PETRI_TRANSITIONS=417} [2024-06-03 20:53:30,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-03 20:53:30,826 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 417 transitions, 5702 flow [2024-06-03 20:53:30,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:30,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:30,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:30,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 20:53:30,827 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:30,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:30,827 INFO L85 PathProgramCache]: Analyzing trace with hash 838531298, now seen corresponding path program 4 times [2024-06-03 20:53:30,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:30,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715408000] [2024-06-03 20:53:30,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:30,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:31,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:31,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715408000] [2024-06-03 20:53:31,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715408000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:31,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:31,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:31,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75991101] [2024-06-03 20:53:31,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:31,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:31,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:31,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:31,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:31,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:31,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 417 transitions, 5702 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:31,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:31,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:31,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:32,521 INFO L124 PetriNetUnfolderBase]: 4797/8323 cut-off events. [2024-06-03 20:53:32,522 INFO L125 PetriNetUnfolderBase]: For 1193423/1193423 co-relation queries the response was YES. [2024-06-03 20:53:32,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59874 conditions, 8323 events. 4797/8323 cut-off events. For 1193423/1193423 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 61227 event pairs, 1521 based on Foata normal form. 2/8323 useless extension candidates. Maximal degree in co-relation 59712. Up to 7355 conditions per place. [2024-06-03 20:53:32,642 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 329 selfloop transitions, 109 changer transitions 0/445 dead transitions. [2024-06-03 20:53:32,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 445 transitions, 6756 flow [2024-06-03 20:53:32,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:53:32,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:53:32,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-03 20:53:32,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582010582010583 [2024-06-03 20:53:32,643 INFO L175 Difference]: Start difference. First operand has 341 places, 417 transitions, 5702 flow. Second operand 9 states and 211 transitions. [2024-06-03 20:53:32,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 445 transitions, 6756 flow [2024-06-03 20:53:36,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 445 transitions, 6453 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-03 20:53:36,615 INFO L231 Difference]: Finished difference. Result has 343 places, 421 transitions, 5754 flow [2024-06-03 20:53:36,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5399, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5754, PETRI_PLACES=343, PETRI_TRANSITIONS=421} [2024-06-03 20:53:36,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-03 20:53:36,616 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 421 transitions, 5754 flow [2024-06-03 20:53:36,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:36,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:36,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:36,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 20:53:36,617 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:36,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:36,617 INFO L85 PathProgramCache]: Analyzing trace with hash 152598546, now seen corresponding path program 5 times [2024-06-03 20:53:36,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:36,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032467736] [2024-06-03 20:53:36,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:36,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:36,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:36,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032467736] [2024-06-03 20:53:36,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032467736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:36,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:36,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:36,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474167819] [2024-06-03 20:53:36,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:36,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:36,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:36,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:36,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:36,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:36,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 421 transitions, 5754 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:36,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:36,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:36,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:38,433 INFO L124 PetriNetUnfolderBase]: 4805/8353 cut-off events. [2024-06-03 20:53:38,433 INFO L125 PetriNetUnfolderBase]: For 1215616/1215616 co-relation queries the response was YES. [2024-06-03 20:53:38,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60098 conditions, 8353 events. 4805/8353 cut-off events. For 1215616/1215616 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 61833 event pairs, 1404 based on Foata normal form. 2/8353 useless extension candidates. Maximal degree in co-relation 59934. Up to 6982 conditions per place. [2024-06-03 20:53:38,542 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 316 selfloop transitions, 132 changer transitions 0/455 dead transitions. [2024-06-03 20:53:38,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 455 transitions, 7130 flow [2024-06-03 20:53:38,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:53:38,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:53:38,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-03 20:53:38,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-03 20:53:38,543 INFO L175 Difference]: Start difference. First operand has 343 places, 421 transitions, 5754 flow. Second operand 9 states and 215 transitions. [2024-06-03 20:53:38,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 455 transitions, 7130 flow [2024-06-03 20:53:42,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 455 transitions, 6896 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-03 20:53:42,710 INFO L231 Difference]: Finished difference. Result has 348 places, 426 transitions, 5975 flow [2024-06-03 20:53:42,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5520, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5975, PETRI_PLACES=348, PETRI_TRANSITIONS=426} [2024-06-03 20:53:42,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-03 20:53:42,711 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 426 transitions, 5975 flow [2024-06-03 20:53:42,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:42,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:42,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:42,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 20:53:42,711 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:42,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:42,711 INFO L85 PathProgramCache]: Analyzing trace with hash 152835696, now seen corresponding path program 6 times [2024-06-03 20:53:42,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:42,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518828700] [2024-06-03 20:53:42,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:42,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:42,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:42,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:42,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518828700] [2024-06-03 20:53:42,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518828700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:42,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:42,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:53:42,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487228638] [2024-06-03 20:53:42,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:42,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:53:42,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:42,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:53:42,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:53:42,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:42,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 426 transitions, 5975 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:42,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:42,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:42,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:44,439 INFO L124 PetriNetUnfolderBase]: 4800/8344 cut-off events. [2024-06-03 20:53:44,439 INFO L125 PetriNetUnfolderBase]: For 1225775/1225775 co-relation queries the response was YES. [2024-06-03 20:53:44,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60384 conditions, 8344 events. 4800/8344 cut-off events. For 1225775/1225775 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 61670 event pairs, 1432 based on Foata normal form. 2/8344 useless extension candidates. Maximal degree in co-relation 60217. Up to 6978 conditions per place. [2024-06-03 20:53:44,555 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 317 selfloop transitions, 128 changer transitions 0/452 dead transitions. [2024-06-03 20:53:44,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 452 transitions, 6966 flow [2024-06-03 20:53:44,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:53:44,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:53:44,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-03 20:53:44,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-03 20:53:44,557 INFO L175 Difference]: Start difference. First operand has 348 places, 426 transitions, 5975 flow. Second operand 9 states and 210 transitions. [2024-06-03 20:53:44,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 452 transitions, 6966 flow [2024-06-03 20:53:49,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 452 transitions, 6507 flow, removed 87 selfloop flow, removed 9 redundant places. [2024-06-03 20:53:49,453 INFO L231 Difference]: Finished difference. Result has 348 places, 427 transitions, 5808 flow [2024-06-03 20:53:49,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5538, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5808, PETRI_PLACES=348, PETRI_TRANSITIONS=427} [2024-06-03 20:53:49,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-03 20:53:49,454 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 427 transitions, 5808 flow [2024-06-03 20:53:49,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:49,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:49,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:49,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 20:53:49,454 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:49,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:49,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1368864726, now seen corresponding path program 1 times [2024-06-03 20:53:49,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:49,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264145832] [2024-06-03 20:53:49,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:49,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:49,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:49,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264145832] [2024-06-03 20:53:49,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264145832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:49,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:49,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:53:49,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870029507] [2024-06-03 20:53:49,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:49,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:53:49,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:49,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:53:49,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:53:49,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:49,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 427 transitions, 5808 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:49,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:49,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:49,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:51,502 INFO L124 PetriNetUnfolderBase]: 4795/8326 cut-off events. [2024-06-03 20:53:51,502 INFO L125 PetriNetUnfolderBase]: For 1242724/1242724 co-relation queries the response was YES. [2024-06-03 20:53:51,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59446 conditions, 8326 events. 4795/8326 cut-off events. For 1242724/1242724 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 61306 event pairs, 1312 based on Foata normal form. 8/8330 useless extension candidates. Maximal degree in co-relation 59281. Up to 6334 conditions per place. [2024-06-03 20:53:51,861 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 409 selfloop transitions, 65 changer transitions 0/481 dead transitions. [2024-06-03 20:53:51,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 481 transitions, 7427 flow [2024-06-03 20:53:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:53:51,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:53:51,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-06-03 20:53:51,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5976190476190476 [2024-06-03 20:53:51,862 INFO L175 Difference]: Start difference. First operand has 348 places, 427 transitions, 5808 flow. Second operand 10 states and 251 transitions. [2024-06-03 20:53:51,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 481 transitions, 7427 flow [2024-06-03 20:53:55,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 481 transitions, 7213 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:53:55,756 INFO L231 Difference]: Finished difference. Result has 352 places, 429 transitions, 5771 flow [2024-06-03 20:53:55,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5594, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5771, PETRI_PLACES=352, PETRI_TRANSITIONS=429} [2024-06-03 20:53:55,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-03 20:53:55,757 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 429 transitions, 5771 flow [2024-06-03 20:53:55,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:55,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:55,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:55,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 20:53:55,757 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:55,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:55,758 INFO L85 PathProgramCache]: Analyzing trace with hash 276932832, now seen corresponding path program 2 times [2024-06-03 20:53:55,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:55,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240333450] [2024-06-03 20:53:55,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:55,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:55,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:55,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240333450] [2024-06-03 20:53:55,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240333450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:55,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:55,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:53:55,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326058627] [2024-06-03 20:53:55,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:55,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:53:55,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:55,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:53:55,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:53:56,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:56,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 429 transitions, 5771 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:56,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:56,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:56,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:58,020 INFO L124 PetriNetUnfolderBase]: 4862/8431 cut-off events. [2024-06-03 20:53:58,020 INFO L125 PetriNetUnfolderBase]: For 1293123/1293123 co-relation queries the response was YES. [2024-06-03 20:53:58,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61392 conditions, 8431 events. 4862/8431 cut-off events. For 1293123/1293123 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 62175 event pairs, 1410 based on Foata normal form. 2/8425 useless extension candidates. Maximal degree in co-relation 61226. Up to 6368 conditions per place. [2024-06-03 20:53:58,123 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 402 selfloop transitions, 69 changer transitions 0/478 dead transitions. [2024-06-03 20:53:58,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 478 transitions, 7408 flow [2024-06-03 20:53:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:53:58,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:53:58,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-03 20:53:58,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-06-03 20:53:58,124 INFO L175 Difference]: Start difference. First operand has 352 places, 429 transitions, 5771 flow. Second operand 10 states and 244 transitions. [2024-06-03 20:53:58,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 478 transitions, 7408 flow [2024-06-03 20:54:03,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 478 transitions, 7267 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-03 20:54:03,099 INFO L231 Difference]: Finished difference. Result has 356 places, 433 transitions, 5876 flow [2024-06-03 20:54:03,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5633, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5876, PETRI_PLACES=356, PETRI_TRANSITIONS=433} [2024-06-03 20:54:03,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-03 20:54:03,099 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 433 transitions, 5876 flow [2024-06-03 20:54:03,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:03,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:03,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:03,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 20:54:03,100 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:54:03,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:03,100 INFO L85 PathProgramCache]: Analyzing trace with hash -180564010, now seen corresponding path program 3 times [2024-06-03 20:54:03,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:03,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688422351] [2024-06-03 20:54:03,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:03,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:03,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:03,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688422351] [2024-06-03 20:54:03,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688422351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:03,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:03,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:54:03,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631442247] [2024-06-03 20:54:03,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:03,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:54:03,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:03,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:54:03,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:54:03,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:03,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 433 transitions, 5876 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:03,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:03,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:03,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:05,362 INFO L124 PetriNetUnfolderBase]: 4839/8397 cut-off events. [2024-06-03 20:54:05,362 INFO L125 PetriNetUnfolderBase]: For 1303533/1303533 co-relation queries the response was YES. [2024-06-03 20:54:05,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60263 conditions, 8397 events. 4839/8397 cut-off events. For 1303533/1303533 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 61963 event pairs, 1505 based on Foata normal form. 10/8404 useless extension candidates. Maximal degree in co-relation 60095. Up to 6894 conditions per place. [2024-06-03 20:54:05,465 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 413 selfloop transitions, 55 changer transitions 0/475 dead transitions. [2024-06-03 20:54:05,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 475 transitions, 7184 flow [2024-06-03 20:54:05,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:54:05,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:54:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-03 20:54:05,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58994708994709 [2024-06-03 20:54:05,466 INFO L175 Difference]: Start difference. First operand has 356 places, 433 transitions, 5876 flow. Second operand 9 states and 223 transitions. [2024-06-03 20:54:05,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 475 transitions, 7184 flow [2024-06-03 20:54:11,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 475 transitions, 7042 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 20:54:11,022 INFO L231 Difference]: Finished difference. Result has 359 places, 433 transitions, 5851 flow [2024-06-03 20:54:11,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5734, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5851, PETRI_PLACES=359, PETRI_TRANSITIONS=433} [2024-06-03 20:54:11,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-03 20:54:11,023 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 433 transitions, 5851 flow [2024-06-03 20:54:11,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:11,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:11,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:11,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 20:54:11,023 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:54:11,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:11,023 INFO L85 PathProgramCache]: Analyzing trace with hash -171993130, now seen corresponding path program 4 times [2024-06-03 20:54:11,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:11,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951055891] [2024-06-03 20:54:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:11,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:11,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:11,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:11,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951055891] [2024-06-03 20:54:11,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951055891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:11,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:11,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:54:11,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258749059] [2024-06-03 20:54:11,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:11,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:54:11,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:11,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:54:11,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:54:11,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:11,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 433 transitions, 5851 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:11,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:11,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:11,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:13,341 INFO L124 PetriNetUnfolderBase]: 4829/8394 cut-off events. [2024-06-03 20:54:13,342 INFO L125 PetriNetUnfolderBase]: For 1271783/1271783 co-relation queries the response was YES. [2024-06-03 20:54:13,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59306 conditions, 8394 events. 4829/8394 cut-off events. For 1271783/1271783 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 61984 event pairs, 1517 based on Foata normal form. 10/8403 useless extension candidates. Maximal degree in co-relation 59137. Up to 7575 conditions per place. [2024-06-03 20:54:13,444 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 408 selfloop transitions, 52 changer transitions 0/467 dead transitions. [2024-06-03 20:54:13,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 467 transitions, 6912 flow [2024-06-03 20:54:13,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:54:13,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:54:13,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-03 20:54:13,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2024-06-03 20:54:13,445 INFO L175 Difference]: Start difference. First operand has 359 places, 433 transitions, 5851 flow. Second operand 9 states and 214 transitions. [2024-06-03 20:54:13,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 467 transitions, 6912 flow [2024-06-03 20:54:19,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 467 transitions, 6810 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 20:54:19,435 INFO L231 Difference]: Finished difference. Result has 361 places, 435 transitions, 5910 flow [2024-06-03 20:54:19,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5750, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5910, PETRI_PLACES=361, PETRI_TRANSITIONS=435} [2024-06-03 20:54:19,436 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-03 20:54:19,436 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 435 transitions, 5910 flow [2024-06-03 20:54:19,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:19,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:19,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:19,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 20:54:19,436 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:54:19,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:19,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1021259734, now seen corresponding path program 5 times [2024-06-03 20:54:19,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:19,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470823771] [2024-06-03 20:54:19,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:19,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:19,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:19,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470823771] [2024-06-03 20:54:19,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470823771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:19,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:19,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:54:19,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428753291] [2024-06-03 20:54:19,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:19,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:54:19,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:19,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:54:19,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:54:19,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:19,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 435 transitions, 5910 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:19,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:19,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:19,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:21,802 INFO L124 PetriNetUnfolderBase]: 4850/8422 cut-off events. [2024-06-03 20:54:21,802 INFO L125 PetriNetUnfolderBase]: For 1251025/1251025 co-relation queries the response was YES. [2024-06-03 20:54:21,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59985 conditions, 8422 events. 4850/8422 cut-off events. For 1251025/1251025 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 62147 event pairs, 1515 based on Foata normal form. 2/8421 useless extension candidates. Maximal degree in co-relation 59815. Up to 7583 conditions per place. [2024-06-03 20:54:21,920 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 408 selfloop transitions, 60 changer transitions 0/475 dead transitions. [2024-06-03 20:54:21,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 475 transitions, 7281 flow [2024-06-03 20:54:21,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:54:21,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:54:21,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-03 20:54:21,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-03 20:54:21,921 INFO L175 Difference]: Start difference. First operand has 361 places, 435 transitions, 5910 flow. Second operand 11 states and 252 transitions. [2024-06-03 20:54:21,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 475 transitions, 7281 flow [2024-06-03 20:54:28,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 475 transitions, 7159 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-03 20:54:28,657 INFO L231 Difference]: Finished difference. Result has 366 places, 439 transitions, 6026 flow [2024-06-03 20:54:28,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5788, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6026, PETRI_PLACES=366, PETRI_TRANSITIONS=439} [2024-06-03 20:54:28,657 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-03 20:54:28,657 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 439 transitions, 6026 flow [2024-06-03 20:54:28,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:28,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:28,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:28,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 20:54:28,658 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:54:28,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:28,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1024116694, now seen corresponding path program 6 times [2024-06-03 20:54:28,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:28,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067096780] [2024-06-03 20:54:28,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:28,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:28,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:28,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067096780] [2024-06-03 20:54:28,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067096780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:28,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:28,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:54:28,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818578204] [2024-06-03 20:54:28,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:28,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:54:28,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:28,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:54:28,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:54:28,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:28,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 439 transitions, 6026 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:28,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:28,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:28,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:30,847 INFO L124 PetriNetUnfolderBase]: 4845/8418 cut-off events. [2024-06-03 20:54:30,847 INFO L125 PetriNetUnfolderBase]: For 1256551/1256551 co-relation queries the response was YES. [2024-06-03 20:54:30,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59872 conditions, 8418 events. 4845/8418 cut-off events. For 1256551/1256551 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 62161 event pairs, 1519 based on Foata normal form. 2/8419 useless extension candidates. Maximal degree in co-relation 59700. Up to 7631 conditions per place. [2024-06-03 20:54:30,966 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 409 selfloop transitions, 54 changer transitions 0/470 dead transitions. [2024-06-03 20:54:30,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 470 transitions, 7028 flow [2024-06-03 20:54:30,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:54:30,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:54:30,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-03 20:54:30,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346320346320347 [2024-06-03 20:54:30,967 INFO L175 Difference]: Start difference. First operand has 366 places, 439 transitions, 6026 flow. Second operand 11 states and 247 transitions. [2024-06-03 20:54:30,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 470 transitions, 7028 flow [2024-06-03 20:54:38,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 470 transitions, 6867 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-03 20:54:38,075 INFO L231 Difference]: Finished difference. Result has 369 places, 439 transitions, 5978 flow [2024-06-03 20:54:38,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5865, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5978, PETRI_PLACES=369, PETRI_TRANSITIONS=439} [2024-06-03 20:54:38,075 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-03 20:54:38,075 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 439 transitions, 5978 flow [2024-06-03 20:54:38,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:38,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:38,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:38,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 20:54:38,076 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:54:38,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:38,076 INFO L85 PathProgramCache]: Analyzing trace with hash -171988015, now seen corresponding path program 1 times [2024-06-03 20:54:38,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:38,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741121034] [2024-06-03 20:54:38,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:38,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:38,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:38,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:38,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741121034] [2024-06-03 20:54:38,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741121034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:38,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:38,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:38,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879248592] [2024-06-03 20:54:38,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:38,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:38,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:38,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:38,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:38,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:38,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 439 transitions, 5978 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:38,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:38,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:38,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:40,338 INFO L124 PetriNetUnfolderBase]: 4850/8427 cut-off events. [2024-06-03 20:54:40,338 INFO L125 PetriNetUnfolderBase]: For 1268779/1268779 co-relation queries the response was YES. [2024-06-03 20:54:40,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59961 conditions, 8427 events. 4850/8427 cut-off events. For 1268779/1268779 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 62264 event pairs, 1519 based on Foata normal form. 1/8427 useless extension candidates. Maximal degree in co-relation 59788. Up to 7403 conditions per place. [2024-06-03 20:54:40,466 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 329 selfloop transitions, 130 changer transitions 0/466 dead transitions. [2024-06-03 20:54:40,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 466 transitions, 7242 flow [2024-06-03 20:54:40,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:54:40,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:54:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-03 20:54:40,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-03 20:54:40,468 INFO L175 Difference]: Start difference. First operand has 369 places, 439 transitions, 5978 flow. Second operand 7 states and 177 transitions. [2024-06-03 20:54:40,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 466 transitions, 7242 flow [2024-06-03 20:54:46,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 466 transitions, 7113 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-03 20:54:46,913 INFO L231 Difference]: Finished difference. Result has 366 places, 442 transitions, 6168 flow [2024-06-03 20:54:46,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5849, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6168, PETRI_PLACES=366, PETRI_TRANSITIONS=442} [2024-06-03 20:54:46,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-03 20:54:46,914 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 442 transitions, 6168 flow [2024-06-03 20:54:46,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:46,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:46,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:46,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 20:54:46,914 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:54:46,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:46,914 INFO L85 PathProgramCache]: Analyzing trace with hash -171982435, now seen corresponding path program 2 times [2024-06-03 20:54:46,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:46,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548554221] [2024-06-03 20:54:46,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:46,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:47,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:47,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548554221] [2024-06-03 20:54:47,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548554221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:47,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:47,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:47,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853552379] [2024-06-03 20:54:47,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:47,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:47,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:47,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:47,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:47,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:47,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 442 transitions, 6168 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:47,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:47,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:47,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:49,086 INFO L124 PetriNetUnfolderBase]: 4855/8436 cut-off events. [2024-06-03 20:54:49,087 INFO L125 PetriNetUnfolderBase]: For 1290048/1290048 co-relation queries the response was YES. [2024-06-03 20:54:49,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60428 conditions, 8436 events. 4855/8436 cut-off events. For 1290048/1290048 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 62336 event pairs, 1519 based on Foata normal form. 1/8436 useless extension candidates. Maximal degree in co-relation 60254. Up to 7409 conditions per place. [2024-06-03 20:54:49,204 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 335 selfloop transitions, 124 changer transitions 0/466 dead transitions. [2024-06-03 20:54:49,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 466 transitions, 7432 flow [2024-06-03 20:54:49,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:54:49,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:54:49,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 20:54:49,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-03 20:54:49,205 INFO L175 Difference]: Start difference. First operand has 366 places, 442 transitions, 6168 flow. Second operand 7 states and 173 transitions. [2024-06-03 20:54:49,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 466 transitions, 7432 flow [2024-06-03 20:54:56,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 466 transitions, 7145 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-03 20:54:56,186 INFO L231 Difference]: Finished difference. Result has 367 places, 445 transitions, 6198 flow [2024-06-03 20:54:56,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5889, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6198, PETRI_PLACES=367, PETRI_TRANSITIONS=445} [2024-06-03 20:54:56,187 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-03 20:54:56,187 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 445 transitions, 6198 flow [2024-06-03 20:54:56,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:56,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:56,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:56,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 20:54:56,187 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:54:56,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:56,188 INFO L85 PathProgramCache]: Analyzing trace with hash -60602585, now seen corresponding path program 3 times [2024-06-03 20:54:56,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:56,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602901967] [2024-06-03 20:54:56,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:56,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:56,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:56,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602901967] [2024-06-03 20:54:56,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602901967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:56,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:56,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:56,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938460220] [2024-06-03 20:54:56,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:56,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:56,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:56,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:56,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:56,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:56,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 445 transitions, 6198 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:56,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:56,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:56,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:58,566 INFO L124 PetriNetUnfolderBase]: 4852/8432 cut-off events. [2024-06-03 20:54:58,566 INFO L125 PetriNetUnfolderBase]: For 1282406/1282406 co-relation queries the response was YES. [2024-06-03 20:54:58,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60264 conditions, 8432 events. 4852/8432 cut-off events. For 1282406/1282406 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 62327 event pairs, 1519 based on Foata normal form. 1/8432 useless extension candidates. Maximal degree in co-relation 60090. Up to 7406 conditions per place. [2024-06-03 20:54:58,678 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 333 selfloop transitions, 127 changer transitions 0/467 dead transitions. [2024-06-03 20:54:58,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 467 transitions, 7172 flow [2024-06-03 20:54:58,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:54:58,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:54:58,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-03 20:54:58,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582010582010583 [2024-06-03 20:54:58,679 INFO L175 Difference]: Start difference. First operand has 367 places, 445 transitions, 6198 flow. Second operand 9 states and 211 transitions. [2024-06-03 20:54:58,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 467 transitions, 7172 flow [2024-06-03 20:55:05,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 467 transitions, 6985 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-03 20:55:05,466 INFO L231 Difference]: Finished difference. Result has 371 places, 445 transitions, 6275 flow [2024-06-03 20:55:05,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6011, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6275, PETRI_PLACES=371, PETRI_TRANSITIONS=445} [2024-06-03 20:55:05,466 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-03 20:55:05,466 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 445 transitions, 6275 flow [2024-06-03 20:55:05,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:05,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:05,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:05,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 20:55:05,467 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:55:05,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:05,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1881563138, now seen corresponding path program 7 times [2024-06-03 20:55:05,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:05,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558902854] [2024-06-03 20:55:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:05,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:05,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:05,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558902854] [2024-06-03 20:55:05,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558902854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:05,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:05,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:55:05,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544251333] [2024-06-03 20:55:05,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:05,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:55:05,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:05,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:55:05,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:55:05,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:55:05,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 445 transitions, 6275 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:05,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:05,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:55:05,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:07,821 INFO L124 PetriNetUnfolderBase]: 4888/8474 cut-off events. [2024-06-03 20:55:07,822 INFO L125 PetriNetUnfolderBase]: For 1352409/1352409 co-relation queries the response was YES. [2024-06-03 20:55:07,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60711 conditions, 8474 events. 4888/8474 cut-off events. For 1352409/1352409 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 62498 event pairs, 1517 based on Foata normal form. 10/8482 useless extension candidates. Maximal degree in co-relation 60537. Up to 6219 conditions per place. [2024-06-03 20:55:07,951 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 303 selfloop transitions, 177 changer transitions 0/487 dead transitions. [2024-06-03 20:55:07,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 487 transitions, 7896 flow [2024-06-03 20:55:07,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:55:07,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:55:07,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-03 20:55:07,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6084656084656085 [2024-06-03 20:55:07,952 INFO L175 Difference]: Start difference. First operand has 371 places, 445 transitions, 6275 flow. Second operand 9 states and 230 transitions. [2024-06-03 20:55:07,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 487 transitions, 7896 flow [2024-06-03 20:55:14,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 487 transitions, 7385 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-03 20:55:14,558 INFO L231 Difference]: Finished difference. Result has 368 places, 447 transitions, 6173 flow [2024-06-03 20:55:14,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5768, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6173, PETRI_PLACES=368, PETRI_TRANSITIONS=447} [2024-06-03 20:55:14,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-03 20:55:14,559 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 447 transitions, 6173 flow [2024-06-03 20:55:14,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:14,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:14,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:14,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 20:55:14,559 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:55:14,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:14,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1872992258, now seen corresponding path program 8 times [2024-06-03 20:55:14,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:14,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4267114] [2024-06-03 20:55:14,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:14,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:14,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:14,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:14,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4267114] [2024-06-03 20:55:14,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4267114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:14,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:14,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:55:14,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686171013] [2024-06-03 20:55:14,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:14,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:55:14,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:14,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:55:14,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:55:14,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:55:14,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 447 transitions, 6173 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:14,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:14,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:55:14,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:16,833 INFO L124 PetriNetUnfolderBase]: 4924/8544 cut-off events. [2024-06-03 20:55:16,833 INFO L125 PetriNetUnfolderBase]: For 1355055/1355055 co-relation queries the response was YES. [2024-06-03 20:55:16,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61255 conditions, 8544 events. 4924/8544 cut-off events. For 1355055/1355055 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 63198 event pairs, 1539 based on Foata normal form. 10/8552 useless extension candidates. Maximal degree in co-relation 61082. Up to 7234 conditions per place. [2024-06-03 20:55:16,950 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 299 selfloop transitions, 173 changer transitions 0/479 dead transitions. [2024-06-03 20:55:16,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 479 transitions, 7494 flow [2024-06-03 20:55:16,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:55:16,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:55:16,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-03 20:55:16,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846560846560847 [2024-06-03 20:55:16,952 INFO L175 Difference]: Start difference. First operand has 368 places, 447 transitions, 6173 flow. Second operand 9 states and 221 transitions. [2024-06-03 20:55:16,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 479 transitions, 7494 flow [2024-06-03 20:55:22,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 479 transitions, 7146 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 20:55:22,743 INFO L231 Difference]: Finished difference. Result has 371 places, 449 transitions, 6226 flow [2024-06-03 20:55:22,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5826, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6226, PETRI_PLACES=371, PETRI_TRANSITIONS=449} [2024-06-03 20:55:22,743 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-03 20:55:22,743 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 449 transitions, 6226 flow [2024-06-03 20:55:22,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:22,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:22,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:22,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 20:55:22,743 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:55:22,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:22,744 INFO L85 PathProgramCache]: Analyzing trace with hash 696129494, now seen corresponding path program 9 times [2024-06-03 20:55:22,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:22,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120515809] [2024-06-03 20:55:22,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:22,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:22,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:22,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120515809] [2024-06-03 20:55:22,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120515809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:22,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:22,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:55:22,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096094204] [2024-06-03 20:55:22,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:22,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:55:22,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:22,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:55:22,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:55:22,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:55:22,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 449 transitions, 6226 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:22,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:22,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:55:22,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:25,044 INFO L124 PetriNetUnfolderBase]: 4914/8530 cut-off events. [2024-06-03 20:55:25,045 INFO L125 PetriNetUnfolderBase]: For 1315707/1315707 co-relation queries the response was YES. [2024-06-03 20:55:25,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60282 conditions, 8530 events. 4914/8530 cut-off events. For 1315707/1315707 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 63105 event pairs, 1531 based on Foata normal form. 10/8538 useless extension candidates. Maximal degree in co-relation 60108. Up to 7220 conditions per place. [2024-06-03 20:55:25,163 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 295 selfloop transitions, 176 changer transitions 0/478 dead transitions. [2024-06-03 20:55:25,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 478 transitions, 7542 flow [2024-06-03 20:55:25,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:55:25,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:55:25,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-03 20:55:25,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-03 20:55:25,164 INFO L175 Difference]: Start difference. First operand has 371 places, 449 transitions, 6226 flow. Second operand 9 states and 217 transitions. [2024-06-03 20:55:25,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 478 transitions, 7542 flow [2024-06-03 20:55:30,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 478 transitions, 7178 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-03 20:55:30,871 INFO L231 Difference]: Finished difference. Result has 373 places, 451 transitions, 6272 flow [2024-06-03 20:55:30,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5862, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6272, PETRI_PLACES=373, PETRI_TRANSITIONS=451} [2024-06-03 20:55:30,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-03 20:55:30,872 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 451 transitions, 6272 flow [2024-06-03 20:55:30,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:30,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:30,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:30,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 20:55:30,872 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:55:30,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:30,872 INFO L85 PathProgramCache]: Analyzing trace with hash -893564970, now seen corresponding path program 10 times [2024-06-03 20:55:30,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:30,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147154858] [2024-06-03 20:55:30,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:30,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:31,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:31,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:31,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147154858] [2024-06-03 20:55:31,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147154858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:31,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:31,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:55:31,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887535019] [2024-06-03 20:55:31,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:31,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:55:31,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:31,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:55:31,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:55:31,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:55:31,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 451 transitions, 6272 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:31,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:31,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:55:31,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:33,202 INFO L124 PetriNetUnfolderBase]: 4922/8542 cut-off events. [2024-06-03 20:55:33,202 INFO L125 PetriNetUnfolderBase]: For 1274300/1274300 co-relation queries the response was YES. [2024-06-03 20:55:33,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60464 conditions, 8542 events. 4922/8542 cut-off events. For 1274300/1274300 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 63139 event pairs, 1531 based on Foata normal form. 2/8542 useless extension candidates. Maximal degree in co-relation 60289. Up to 7264 conditions per place. [2024-06-03 20:55:33,320 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 279 selfloop transitions, 188 changer transitions 0/474 dead transitions. [2024-06-03 20:55:33,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 474 transitions, 7556 flow [2024-06-03 20:55:33,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:55:33,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:55:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-03 20:55:33,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-03 20:55:33,321 INFO L175 Difference]: Start difference. First operand has 373 places, 451 transitions, 6272 flow. Second operand 9 states and 208 transitions. [2024-06-03 20:55:33,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 474 transitions, 7556 flow [2024-06-03 20:55:39,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 474 transitions, 7182 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-03 20:55:39,249 INFO L231 Difference]: Finished difference. Result has 375 places, 453 transitions, 6335 flow [2024-06-03 20:55:39,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5898, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6335, PETRI_PLACES=375, PETRI_TRANSITIONS=453} [2024-06-03 20:55:39,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-03 20:55:39,249 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 453 transitions, 6335 flow [2024-06-03 20:55:39,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:39,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:39,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:39,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 20:55:39,250 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:55:39,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:39,250 INFO L85 PathProgramCache]: Analyzing trace with hash -124294402, now seen corresponding path program 11 times [2024-06-03 20:55:39,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:39,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100799728] [2024-06-03 20:55:39,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:39,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:39,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:39,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100799728] [2024-06-03 20:55:39,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100799728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:39,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:39,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:55:39,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635786358] [2024-06-03 20:55:39,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:39,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:55:39,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:39,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:55:39,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:55:39,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:55:39,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 453 transitions, 6335 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:39,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:39,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:55:39,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:41,364 INFO L124 PetriNetUnfolderBase]: 4930/8554 cut-off events. [2024-06-03 20:55:41,364 INFO L125 PetriNetUnfolderBase]: For 1293278/1293278 co-relation queries the response was YES. [2024-06-03 20:55:41,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60612 conditions, 8554 events. 4930/8554 cut-off events. For 1293278/1293278 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 63246 event pairs, 1519 based on Foata normal form. 2/8555 useless extension candidates. Maximal degree in co-relation 60436. Up to 7808 conditions per place. [2024-06-03 20:55:41,478 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 430 selfloop transitions, 38 changer transitions 0/475 dead transitions. [2024-06-03 20:55:41,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 475 transitions, 7373 flow [2024-06-03 20:55:41,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:55:41,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:55:41,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-03 20:55:41,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-03 20:55:41,479 INFO L175 Difference]: Start difference. First operand has 375 places, 453 transitions, 6335 flow. Second operand 9 states and 198 transitions. [2024-06-03 20:55:41,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 475 transitions, 7373 flow [2024-06-03 20:55:47,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 475 transitions, 6960 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-03 20:55:47,936 INFO L231 Difference]: Finished difference. Result has 377 places, 455 transitions, 6061 flow [2024-06-03 20:55:47,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5922, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6061, PETRI_PLACES=377, PETRI_TRANSITIONS=455} [2024-06-03 20:55:47,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-03 20:55:47,937 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 455 transitions, 6061 flow [2024-06-03 20:55:47,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:47,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:47,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:47,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 20:55:47,937 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:55:47,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:47,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1064385510, now seen corresponding path program 12 times [2024-06-03 20:55:47,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:47,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949803981] [2024-06-03 20:55:47,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:47,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:48,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:48,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:48,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949803981] [2024-06-03 20:55:48,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949803981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:48,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:48,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:55:48,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287060573] [2024-06-03 20:55:48,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:48,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:55:48,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:48,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:55:48,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:55:48,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:55:48,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 455 transitions, 6061 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:48,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:48,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:55:48,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:50,093 INFO L124 PetriNetUnfolderBase]: 4938/8566 cut-off events. [2024-06-03 20:55:50,094 INFO L125 PetriNetUnfolderBase]: For 1311223/1311223 co-relation queries the response was YES. [2024-06-03 20:55:50,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60347 conditions, 8566 events. 4938/8566 cut-off events. For 1311223/1311223 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 63225 event pairs, 1519 based on Foata normal form. 2/8567 useless extension candidates. Maximal degree in co-relation 60170. Up to 7806 conditions per place. [2024-06-03 20:55:50,205 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 430 selfloop transitions, 42 changer transitions 0/479 dead transitions. [2024-06-03 20:55:50,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 479 transitions, 7106 flow [2024-06-03 20:55:50,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:55:50,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:55:50,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-03 20:55:50,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-03 20:55:50,206 INFO L175 Difference]: Start difference. First operand has 377 places, 455 transitions, 6061 flow. Second operand 10 states and 217 transitions. [2024-06-03 20:55:50,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 479 transitions, 7106 flow [2024-06-03 20:55:57,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 479 transitions, 6993 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-03 20:55:57,088 INFO L231 Difference]: Finished difference. Result has 380 places, 457 transitions, 6090 flow [2024-06-03 20:55:57,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5948, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6090, PETRI_PLACES=380, PETRI_TRANSITIONS=457} [2024-06-03 20:55:57,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-03 20:55:57,089 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 457 transitions, 6090 flow [2024-06-03 20:55:57,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:57,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:57,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:57,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 20:55:57,089 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:55:57,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:57,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1872987143, now seen corresponding path program 4 times [2024-06-03 20:55:57,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:57,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983837515] [2024-06-03 20:55:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:57,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:57,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:57,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983837515] [2024-06-03 20:55:57,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983837515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:57,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:57,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:55:57,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846230551] [2024-06-03 20:55:57,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:57,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:55:57,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:57,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:55:57,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:55:57,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:55:57,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 457 transitions, 6090 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:57,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:57,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:55:57,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:59,474 INFO L124 PetriNetUnfolderBase]: 4951/8588 cut-off events. [2024-06-03 20:55:59,474 INFO L125 PetriNetUnfolderBase]: For 1331134/1331134 co-relation queries the response was YES. [2024-06-03 20:55:59,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60709 conditions, 8588 events. 4951/8588 cut-off events. For 1331134/1331134 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 63517 event pairs, 1521 based on Foata normal form. 1/8588 useless extension candidates. Maximal degree in co-relation 60531. Up to 7309 conditions per place. [2024-06-03 20:55:59,586 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 178 changer transitions 0/496 dead transitions. [2024-06-03 20:55:59,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 496 transitions, 7720 flow [2024-06-03 20:55:59,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:55:59,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:55:59,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-03 20:55:59,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-03 20:55:59,587 INFO L175 Difference]: Start difference. First operand has 380 places, 457 transitions, 6090 flow. Second operand 9 states and 222 transitions. [2024-06-03 20:55:59,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 496 transitions, 7720 flow [2024-06-03 20:56:06,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 496 transitions, 7603 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-03 20:56:06,016 INFO L231 Difference]: Finished difference. Result has 381 places, 463 transitions, 6398 flow [2024-06-03 20:56:06,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5973, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6398, PETRI_PLACES=381, PETRI_TRANSITIONS=463} [2024-06-03 20:56:06,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-03 20:56:06,016 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 463 transitions, 6398 flow [2024-06-03 20:56:06,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:06,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:06,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:56:06,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 20:56:06,017 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:56:06,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:06,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1872981563, now seen corresponding path program 5 times [2024-06-03 20:56:06,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:06,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237009784] [2024-06-03 20:56:06,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:06,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:06,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:06,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:06,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:06,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237009784] [2024-06-03 20:56:06,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237009784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:06,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:06,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:56:06,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820909495] [2024-06-03 20:56:06,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:06,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:56:06,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:06,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:56:06,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:56:06,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:56:06,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 463 transitions, 6398 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:06,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:06,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:56:06,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:08,087 INFO L124 PetriNetUnfolderBase]: 4964/8610 cut-off events. [2024-06-03 20:56:08,088 INFO L125 PetriNetUnfolderBase]: For 1361259/1361259 co-relation queries the response was YES. [2024-06-03 20:56:08,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61558 conditions, 8610 events. 4964/8610 cut-off events. For 1361259/1361259 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 63673 event pairs, 1521 based on Foata normal form. 1/8610 useless extension candidates. Maximal degree in co-relation 61379. Up to 7324 conditions per place. [2024-06-03 20:56:08,212 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 312 selfloop transitions, 180 changer transitions 0/499 dead transitions. [2024-06-03 20:56:08,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 499 transitions, 8042 flow [2024-06-03 20:56:08,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:56:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:56:08,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-03 20:56:08,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767195767195767 [2024-06-03 20:56:08,213 INFO L175 Difference]: Start difference. First operand has 381 places, 463 transitions, 6398 flow. Second operand 9 states and 218 transitions. [2024-06-03 20:56:08,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 499 transitions, 8042 flow [2024-06-03 20:56:15,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 499 transitions, 7790 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 20:56:15,054 INFO L231 Difference]: Finished difference. Result has 385 places, 469 transitions, 6588 flow [2024-06-03 20:56:15,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6152, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6588, PETRI_PLACES=385, PETRI_TRANSITIONS=469} [2024-06-03 20:56:15,054 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-03 20:56:15,054 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 469 transitions, 6588 flow [2024-06-03 20:56:15,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:15,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:15,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:56:15,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 20:56:15,055 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:56:15,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:15,055 INFO L85 PathProgramCache]: Analyzing trace with hash -389517925, now seen corresponding path program 6 times [2024-06-03 20:56:15,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:15,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032123827] [2024-06-03 20:56:15,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:15,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:15,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:15,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032123827] [2024-06-03 20:56:15,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032123827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:15,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:15,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:56:15,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635147414] [2024-06-03 20:56:15,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:15,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:56:15,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:15,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:56:15,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:56:15,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:56:15,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 469 transitions, 6588 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:15,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:15,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:56:15,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:17,353 INFO L124 PetriNetUnfolderBase]: 4961/8606 cut-off events. [2024-06-03 20:56:17,353 INFO L125 PetriNetUnfolderBase]: For 1374347/1374347 co-relation queries the response was YES. [2024-06-03 20:56:17,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61698 conditions, 8606 events. 4961/8606 cut-off events. For 1374347/1374347 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 63675 event pairs, 1521 based on Foata normal form. 1/8606 useless extension candidates. Maximal degree in co-relation 61518. Up to 7321 conditions per place. [2024-06-03 20:56:17,465 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 296 selfloop transitions, 203 changer transitions 0/506 dead transitions. [2024-06-03 20:56:17,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 506 transitions, 8194 flow [2024-06-03 20:56:17,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:56:17,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:56:17,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-03 20:56:17,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-03 20:56:17,466 INFO L175 Difference]: Start difference. First operand has 385 places, 469 transitions, 6588 flow. Second operand 10 states and 243 transitions. [2024-06-03 20:56:17,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 506 transitions, 8194 flow [2024-06-03 20:56:23,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 506 transitions, 7938 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 20:56:23,789 INFO L231 Difference]: Finished difference. Result has 390 places, 469 transitions, 6746 flow [2024-06-03 20:56:23,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6332, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6746, PETRI_PLACES=390, PETRI_TRANSITIONS=469} [2024-06-03 20:56:23,790 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-03 20:56:23,790 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 469 transitions, 6746 flow [2024-06-03 20:56:23,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:23,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:23,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:56:23,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 20:56:23,790 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:56:23,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:23,791 INFO L85 PathProgramCache]: Analyzing trace with hash 737628533, now seen corresponding path program 7 times [2024-06-03 20:56:23,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:23,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388486390] [2024-06-03 20:56:23,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:23,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:23,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:23,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388486390] [2024-06-03 20:56:23,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388486390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:23,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:23,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:56:23,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717052859] [2024-06-03 20:56:23,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:23,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:56:23,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:23,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:56:23,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:56:24,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:56:24,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 469 transitions, 6746 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:24,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:24,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:56:24,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:25,916 INFO L124 PetriNetUnfolderBase]: 4974/8628 cut-off events. [2024-06-03 20:56:25,917 INFO L125 PetriNetUnfolderBase]: For 1404254/1404254 co-relation queries the response was YES. [2024-06-03 20:56:26,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62274 conditions, 8628 events. 4974/8628 cut-off events. For 1404254/1404254 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 63824 event pairs, 1521 based on Foata normal form. 1/8628 useless extension candidates. Maximal degree in co-relation 62093. Up to 7336 conditions per place. [2024-06-03 20:56:26,054 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 308 selfloop transitions, 187 changer transitions 0/502 dead transitions. [2024-06-03 20:56:26,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 502 transitions, 8408 flow [2024-06-03 20:56:26,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:56:26,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:56:26,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-03 20:56:26,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-03 20:56:26,055 INFO L175 Difference]: Start difference. First operand has 390 places, 469 transitions, 6746 flow. Second operand 9 states and 215 transitions. [2024-06-03 20:56:26,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 502 transitions, 8408 flow