./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe005_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/safe005_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/safe005_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe005_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 [2024-06-04 16:00:56,618 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 16:00:56,669 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 16:00:56,672 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 16:00:56,673 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 16:00:56,704 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 16:00:56,705 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 16:00:56,705 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 16:00:56,706 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 16:00:56,709 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 16:00:56,710 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 16:00:56,710 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 16:00:56,711 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 16:00:56,712 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 16:00:56,712 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 16:00:56,712 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 16:00:56,713 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 16:00:56,713 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 16:00:56,713 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 16:00:56,713 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 16:00:56,713 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 16:00:56,715 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 16:00:56,715 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 16:00:56,715 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 16:00:56,715 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 16:00:56,716 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 16:00:56,716 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 16:00:56,716 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 16:00:56,717 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 16:00:56,717 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 16:00:56,718 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 16:00:56,718 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 16:00:56,718 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:00:56,718 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 16:00:56,718 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 16:00:56,719 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 16:00:56,719 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 16:00:56,719 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 16:00:56,719 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 16:00:56,720 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 16:00:56,720 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 16:00:56,720 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 16:00:56,720 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 16:00:56,721 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 16:00:56,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 16:00:56,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 16:00:56,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 16:00:56,969 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 16:00:56,970 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 16:00:56,971 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe005_tso.yml/witness.yml [2024-06-04 16:00:57,115 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 16:00:57,115 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 16:00:57,116 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe005_tso.i [2024-06-04 16:00:58,129 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 16:00:58,325 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 16:00:58,326 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe005_tso.i [2024-06-04 16:00:58,337 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74cb45cb7/9eea773b694a48b2be208f78bbc61a4a/FLAG0631ac4b5 [2024-06-04 16:00:58,350 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74cb45cb7/9eea773b694a48b2be208f78bbc61a4a [2024-06-04 16:00:58,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 16:00:58,352 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 16:00:58,353 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 16:00:58,353 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 16:00:58,357 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 16:00:58,358 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:00:57" (1/2) ... [2024-06-04 16:00:58,358 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d38bc6e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:00:58, skipping insertion in model container [2024-06-04 16:00:58,359 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:00:57" (1/2) ... [2024-06-04 16:00:58,360 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4c39c5be and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:00:58, skipping insertion in model container [2024-06-04 16:00:58,360 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:00:58" (2/2) ... [2024-06-04 16:00:58,360 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d38bc6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:58, skipping insertion in model container [2024-06-04 16:00:58,360 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:00:58" (2/2) ... [2024-06-04 16:00:58,361 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 16:00:58,410 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 16:00:58,411 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-04 16:00:58,411 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-04 16:00:58,412 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-04 16:00:58,412 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 16:00:58,412 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-04 16:00:58,448 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 16:00:58,777 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:00:58,786 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 16:00:58,897 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:00:58,925 INFO L206 MainTranslator]: Completed translation [2024-06-04 16:00:58,925 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:58 WrapperNode [2024-06-04 16:00:58,925 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 16:00:58,926 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 16:00:58,926 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 16:00:58,927 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 16:00:58,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:58" (1/1) ... [2024-06-04 16:00:58,944 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:58" (1/1) ... [2024-06-04 16:00:58,975 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-04 16:00:58,976 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 16:00:58,976 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 16:00:58,976 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 16:00:58,977 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 16:00:58,985 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:58" (1/1) ... [2024-06-04 16:00:58,985 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:58" (1/1) ... [2024-06-04 16:00:58,988 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:58" (1/1) ... [2024-06-04 16:00:59,000 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]. [2024-06-04 16:00:59,001 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:58" (1/1) ... [2024-06-04 16:00:59,001 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:58" (1/1) ... [2024-06-04 16:00:59,006 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:58" (1/1) ... [2024-06-04 16:00:59,008 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:58" (1/1) ... [2024-06-04 16:00:59,009 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:58" (1/1) ... [2024-06-04 16:00:59,010 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:58" (1/1) ... [2024-06-04 16:00:59,012 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 16:00:59,013 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 16:00:59,013 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 16:00:59,013 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 16:00:59,014 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:58" (1/1) ... [2024-06-04 16:00:59,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:00:59,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:00:59,048 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) [2024-06-04 16:00:59,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 16:00:59,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 16:00:59,079 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 16:00:59,079 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 16:00:59,079 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 16:00:59,079 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 16:00:59,079 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 16:00:59,079 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 16:00:59,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 16:00:59,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 16:00:59,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 16:00:59,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 16:00:59,081 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 16:00:59,067 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 [2024-06-04 16:00:59,167 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 16:00:59,169 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 16:00:59,471 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 16:00:59,472 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 16:00:59,557 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 16:00:59,557 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 16:00:59,558 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:00:59 BoogieIcfgContainer [2024-06-04 16:00:59,558 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 16:00:59,560 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 16:00:59,560 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 16:00:59,563 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 16:00:59,564 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:00:57" (1/4) ... [2024-06-04 16:00:59,564 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d0aeeb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:00:59, skipping insertion in model container [2024-06-04 16:00:59,564 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 04:00:58" (2/4) ... [2024-06-04 16:00:59,565 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d0aeeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:00:59, skipping insertion in model container [2024-06-04 16:00:59,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:00:58" (3/4) ... [2024-06-04 16:00:59,566 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d0aeeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:00:59, skipping insertion in model container [2024-06-04 16:00:59,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:00:59" (4/4) ... [2024-06-04 16:00:59,567 INFO L112 eAbstractionObserver]: Analyzing ICFG safe005_tso.i [2024-06-04 16:00:59,581 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 16:00:59,582 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 16:00:59,582 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 16:00:59,626 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 16:00:59,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 16:00:59,690 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-04 16:00:59,691 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:00:59,692 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 5. Compared 66 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. [2024-06-04 16:00:59,693 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 16:00:59,696 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-04 16:00:59,707 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 16:00:59,714 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;@250c70ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 16:00:59,714 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 16:00:59,718 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 16:00:59,719 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 16:00:59,719 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:00:59,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:00:59,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 16:00:59,720 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)] === [2024-06-04 16:00:59,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:00:59,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1787024188, now seen corresponding path program 1 times [2024-06-04 16:00:59,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:00:59,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684560206] [2024-06-04 16:00:59,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:00:59,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:00:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:00,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:00,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684560206] [2024-06-04 16:01:00,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684560206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:00,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:00,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 16:01:00,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453528157] [2024-06-04 16:01:00,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:00,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 16:01:00,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:00,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 16:01:00,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 16:01:00,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-04 16:01:00,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:00,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:00,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-04 16:01:00,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:00,759 INFO L124 PetriNetUnfolderBase]: 470/795 cut-off events. [2024-06-04 16:01:00,759 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-04 16:01:00,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1596 conditions, 795 events. 470/795 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3833 event pairs, 281 based on Foata normal form. 1/752 useless extension candidates. Maximal degree in co-relation 1581. Up to 736 conditions per place. [2024-06-04 16:01:00,774 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 29 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-04 16:01:00,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 167 flow [2024-06-04 16:01:00,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 16:01:00,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 16:01:00,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-06-04 16:01:00,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2024-06-04 16:01:00,788 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 87 transitions. [2024-06-04 16:01:00,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 167 flow [2024-06-04 16:01:00,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:00,794 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-04 16:01:00,795 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} [2024-06-04 16:01:00,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-04 16:01:00,798 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-04 16:01:00,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:00,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:00,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:00,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 16:01:00,800 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)] === [2024-06-04 16:01:00,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:00,801 INFO L85 PathProgramCache]: Analyzing trace with hash 656708195, now seen corresponding path program 1 times [2024-06-04 16:01:00,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:00,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632124208] [2024-06-04 16:01:00,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:00,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:01,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:01,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632124208] [2024-06-04 16:01:01,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632124208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:01,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:01,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:01:01,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738269001] [2024-06-04 16:01:01,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:01,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:01:01,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:01,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:01:01,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:01:01,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:01:01,170 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) [2024-06-04 16:01:01,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:01,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:01:01,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:01,359 INFO L124 PetriNetUnfolderBase]: 724/1189 cut-off events. [2024-06-04 16:01:01,359 INFO L125 PetriNetUnfolderBase]: For 256/290 co-relation queries the response was YES. [2024-06-04 16:01:01,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2721 conditions, 1189 events. 724/1189 cut-off events. For 256/290 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5988 event pairs, 401 based on Foata normal form. 3/1161 useless extension candidates. Maximal degree in co-relation 2706. Up to 1090 conditions per place. [2024-06-04 16:01:01,368 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 41 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-04 16:01:01,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 56 transitions, 254 flow [2024-06-04 16:01:01,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:01:01,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:01:01,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2024-06-04 16:01:01,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-04 16:01:01,373 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 108 transitions. [2024-06-04 16:01:01,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 56 transitions, 254 flow [2024-06-04 16:01:01,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 56 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 16:01:01,376 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 154 flow [2024-06-04 16:01:01,376 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=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-06-04 16:01:01,377 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-04 16:01:01,377 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 154 flow [2024-06-04 16:01:01,377 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) [2024-06-04 16:01:01,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:01,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:01,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 16:01:01,381 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)] === [2024-06-04 16:01:01,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:01,382 INFO L85 PathProgramCache]: Analyzing trace with hash -365005390, now seen corresponding path program 1 times [2024-06-04 16:01:01,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:01,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497159167] [2024-06-04 16:01:01,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:01,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:01,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:01,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497159167] [2024-06-04 16:01:01,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497159167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:01,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:01,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:01:01,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304593735] [2024-06-04 16:01:01,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:01,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:01:01,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:01,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:01:01,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:01:01,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-04 16:01:01,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:01,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:01,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-04 16:01:01,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:01,955 INFO L124 PetriNetUnfolderBase]: 632/1066 cut-off events. [2024-06-04 16:01:01,955 INFO L125 PetriNetUnfolderBase]: For 588/681 co-relation queries the response was YES. [2024-06-04 16:01:01,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2740 conditions, 1066 events. 632/1066 cut-off events. For 588/681 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5437 event pairs, 334 based on Foata normal form. 2/1024 useless extension candidates. Maximal degree in co-relation 2722. Up to 968 conditions per place. [2024-06-04 16:01:01,962 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 36 selfloop transitions, 9 changer transitions 0/56 dead transitions. [2024-06-04 16:01:01,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 56 transitions, 282 flow [2024-06-04 16:01:01,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:01:01,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:01:01,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-04 16:01:01,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2024-06-04 16:01:01,966 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 154 flow. Second operand 4 states and 107 transitions. [2024-06-04 16:01:01,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 56 transitions, 282 flow [2024-06-04 16:01:01,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 280 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-04 16:01:01,969 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 195 flow [2024-06-04 16:01:01,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-04 16:01:01,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-04 16:01:01,970 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 195 flow [2024-06-04 16:01:01,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:01,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:01,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:01,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 16:01:01,971 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)] === [2024-06-04 16:01:01,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:01,972 INFO L85 PathProgramCache]: Analyzing trace with hash 102085025, now seen corresponding path program 1 times [2024-06-04 16:01:01,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:01,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832124221] [2024-06-04 16:01:01,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:01,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:02,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:02,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832124221] [2024-06-04 16:01:02,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832124221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:02,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:02,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:02,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225164089] [2024-06-04 16:01:02,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:02,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:02,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:02,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:02,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:02,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:02,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 195 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) [2024-06-04 16:01:02,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:02,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:02,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:02,514 INFO L124 PetriNetUnfolderBase]: 908/1469 cut-off events. [2024-06-04 16:01:02,514 INFO L125 PetriNetUnfolderBase]: For 1410/1410 co-relation queries the response was YES. [2024-06-04 16:01:02,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4145 conditions, 1469 events. 908/1469 cut-off events. For 1410/1410 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7285 event pairs, 290 based on Foata normal form. 6/1462 useless extension candidates. Maximal degree in co-relation 4124. Up to 1315 conditions per place. [2024-06-04 16:01:02,523 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 56 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2024-06-04 16:01:02,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 75 transitions, 413 flow [2024-06-04 16:01:02,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:02,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:02,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 16:01:02,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-04 16:01:02,525 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 195 flow. Second operand 6 states and 149 transitions. [2024-06-04 16:01:02,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 75 transitions, 413 flow [2024-06-04 16:01:02,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 396 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:02,530 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 235 flow [2024-06-04 16:01:02,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=235, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-04 16:01:02,532 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-04 16:01:02,532 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 235 flow [2024-06-04 16:01:02,532 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) [2024-06-04 16:01:02,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:02,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:02,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 16:01:02,533 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)] === [2024-06-04 16:01:02,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:02,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1547392333, now seen corresponding path program 1 times [2024-06-04 16:01:02,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:02,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518714249] [2024-06-04 16:01:02,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:02,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:02,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:02,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518714249] [2024-06-04 16:01:02,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518714249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:02,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:02,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:01:02,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21908182] [2024-06-04 16:01:02,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:02,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:01:02,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:02,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:01:02,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:01:02,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:02,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 235 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) [2024-06-04 16:01:02,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:02,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:02,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:03,065 INFO L124 PetriNetUnfolderBase]: 917/1513 cut-off events. [2024-06-04 16:01:03,065 INFO L125 PetriNetUnfolderBase]: For 2176/2176 co-relation queries the response was YES. [2024-06-04 16:01:03,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4584 conditions, 1513 events. 917/1513 cut-off events. For 2176/2176 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7681 event pairs, 320 based on Foata normal form. 4/1511 useless extension candidates. Maximal degree in co-relation 4561. Up to 1318 conditions per place. [2024-06-04 16:01:03,075 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 54 selfloop transitions, 15 changer transitions 0/76 dead transitions. [2024-06-04 16:01:03,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 76 transitions, 473 flow [2024-06-04 16:01:03,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:03,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:03,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-04 16:01:03,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-06-04 16:01:03,077 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 235 flow. Second operand 5 states and 127 transitions. [2024-06-04 16:01:03,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 76 transitions, 473 flow [2024-06-04 16:01:03,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 448 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:03,080 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 308 flow [2024-06-04 16:01:03,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2024-06-04 16:01:03,081 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-04 16:01:03,081 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 308 flow [2024-06-04 16:01:03,081 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) [2024-06-04 16:01:03,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:03,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:03,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 16:01:03,082 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)] === [2024-06-04 16:01:03,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:03,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1373337693, now seen corresponding path program 1 times [2024-06-04 16:01:03,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:03,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452406122] [2024-06-04 16:01:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:03,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:03,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:03,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452406122] [2024-06-04 16:01:03,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452406122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:03,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:03,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:01:03,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704221945] [2024-06-04 16:01:03,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:03,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:01:03,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:03,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:01:03,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:01:03,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:03,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 308 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) [2024-06-04 16:01:03,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:03,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:03,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:03,523 INFO L124 PetriNetUnfolderBase]: 928/1534 cut-off events. [2024-06-04 16:01:03,524 INFO L125 PetriNetUnfolderBase]: For 3307/3310 co-relation queries the response was YES. [2024-06-04 16:01:03,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5234 conditions, 1534 events. 928/1534 cut-off events. For 3307/3310 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7754 event pairs, 341 based on Foata normal form. 2/1529 useless extension candidates. Maximal degree in co-relation 5209. Up to 1325 conditions per place. [2024-06-04 16:01:03,535 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-04 16:01:03,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 83 transitions, 567 flow [2024-06-04 16:01:03,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:03,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:03,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-04 16:01:03,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6238095238095238 [2024-06-04 16:01:03,536 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 308 flow. Second operand 5 states and 131 transitions. [2024-06-04 16:01:03,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 83 transitions, 567 flow [2024-06-04 16:01:03,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 535 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:03,542 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 372 flow [2024-06-04 16:01:03,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=372, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2024-06-04 16:01:03,542 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-04 16:01:03,543 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 372 flow [2024-06-04 16:01:03,543 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) [2024-06-04 16:01:03,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:03,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:03,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 16:01:03,543 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)] === [2024-06-04 16:01:03,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:03,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1440391685, now seen corresponding path program 2 times [2024-06-04 16:01:03,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:03,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785804830] [2024-06-04 16:01:03,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:03,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:03,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:03,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785804830] [2024-06-04 16:01:03,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785804830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:03,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:03,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:01:03,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613728895] [2024-06-04 16:01:03,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:03,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:01:03,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:03,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:01:03,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:01:03,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:03,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 372 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) [2024-06-04 16:01:03,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:03,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:03,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:03,978 INFO L124 PetriNetUnfolderBase]: 915/1511 cut-off events. [2024-06-04 16:01:03,978 INFO L125 PetriNetUnfolderBase]: For 3810/3810 co-relation queries the response was YES. [2024-06-04 16:01:03,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5272 conditions, 1511 events. 915/1511 cut-off events. For 3810/3810 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7637 event pairs, 336 based on Foata normal form. 4/1509 useless extension candidates. Maximal degree in co-relation 5245. Up to 1312 conditions per place. [2024-06-04 16:01:03,987 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 53 selfloop transitions, 18 changer transitions 0/78 dead transitions. [2024-06-04 16:01:03,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 552 flow [2024-06-04 16:01:03,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:03,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:03,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-04 16:01:03,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 16:01:03,989 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 372 flow. Second operand 5 states and 125 transitions. [2024-06-04 16:01:03,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 552 flow [2024-06-04 16:01:03,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 78 transitions, 529 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-04 16:01:03,994 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 395 flow [2024-06-04 16:01:03,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=395, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-04 16:01:03,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-04 16:01:03,994 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 395 flow [2024-06-04 16:01:03,995 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) [2024-06-04 16:01:03,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:03,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:03,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 16:01:03,995 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)] === [2024-06-04 16:01:03,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:03,996 INFO L85 PathProgramCache]: Analyzing trace with hash 982400510, now seen corresponding path program 1 times [2024-06-04 16:01:03,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:03,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225259625] [2024-06-04 16:01:03,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:03,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:04,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:04,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225259625] [2024-06-04 16:01:04,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225259625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:04,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:04,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:04,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234283120] [2024-06-04 16:01:04,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:04,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:04,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:04,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:04,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:04,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:04,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 395 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) [2024-06-04 16:01:04,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:04,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:04,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:04,501 INFO L124 PetriNetUnfolderBase]: 924/1522 cut-off events. [2024-06-04 16:01:04,501 INFO L125 PetriNetUnfolderBase]: For 4814/4814 co-relation queries the response was YES. [2024-06-04 16:01:04,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5439 conditions, 1522 events. 924/1522 cut-off events. For 4814/4814 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7629 event pairs, 306 based on Foata normal form. 8/1524 useless extension candidates. Maximal degree in co-relation 5410. Up to 1291 conditions per place. [2024-06-04 16:01:04,512 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 22 changer transitions 0/86 dead transitions. [2024-06-04 16:01:04,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 86 transitions, 623 flow [2024-06-04 16:01:04,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:04,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:04,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 16:01:04,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:01:04,514 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 395 flow. Second operand 6 states and 147 transitions. [2024-06-04 16:01:04,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 86 transitions, 623 flow [2024-06-04 16:01:04,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 86 transitions, 594 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:04,521 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 444 flow [2024-06-04 16:01:04,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=444, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2024-06-04 16:01:04,523 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-04 16:01:04,524 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 444 flow [2024-06-04 16:01:04,524 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) [2024-06-04 16:01:04,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:04,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:04,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 16:01:04,524 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)] === [2024-06-04 16:01:04,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:04,525 INFO L85 PathProgramCache]: Analyzing trace with hash -530081774, now seen corresponding path program 1 times [2024-06-04 16:01:04,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:04,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023796718] [2024-06-04 16:01:04,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:04,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:04,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:04,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023796718] [2024-06-04 16:01:04,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023796718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:04,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:04,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:04,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652639752] [2024-06-04 16:01:04,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:04,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:04,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:04,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:04,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:04,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:04,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 444 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) [2024-06-04 16:01:04,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:04,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:04,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:05,065 INFO L124 PetriNetUnfolderBase]: 935/1547 cut-off events. [2024-06-04 16:01:05,066 INFO L125 PetriNetUnfolderBase]: For 5859/5859 co-relation queries the response was YES. [2024-06-04 16:01:05,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5862 conditions, 1547 events. 935/1547 cut-off events. For 5859/5859 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7811 event pairs, 308 based on Foata normal form. 2/1546 useless extension candidates. Maximal degree in co-relation 5832. Up to 1369 conditions per place. [2024-06-04 16:01:05,077 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 65 selfloop transitions, 15 changer transitions 0/87 dead transitions. [2024-06-04 16:01:05,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 87 transitions, 670 flow [2024-06-04 16:01:05,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:05,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:05,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-04 16:01:05,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 16:01:05,079 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 444 flow. Second operand 5 states and 126 transitions. [2024-06-04 16:01:05,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 87 transitions, 670 flow [2024-06-04 16:01:05,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 87 transitions, 616 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:05,086 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 458 flow [2024-06-04 16:01:05,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=458, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-06-04 16:01:05,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-04 16:01:05,087 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 458 flow [2024-06-04 16:01:05,088 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) [2024-06-04 16:01:05,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:05,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:05,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 16:01:05,088 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)] === [2024-06-04 16:01:05,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:05,088 INFO L85 PathProgramCache]: Analyzing trace with hash 153155730, now seen corresponding path program 2 times [2024-06-04 16:01:05,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:05,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106232711] [2024-06-04 16:01:05,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:05,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:05,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:05,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106232711] [2024-06-04 16:01:05,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106232711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:05,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:05,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:05,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935851539] [2024-06-04 16:01:05,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:05,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:05,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:05,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:05,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:05,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:05,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 458 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) [2024-06-04 16:01:05,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:05,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:05,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:05,588 INFO L124 PetriNetUnfolderBase]: 962/1592 cut-off events. [2024-06-04 16:01:05,588 INFO L125 PetriNetUnfolderBase]: For 7209/7212 co-relation queries the response was YES. [2024-06-04 16:01:05,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6283 conditions, 1592 events. 962/1592 cut-off events. For 7209/7212 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8062 event pairs, 304 based on Foata normal form. 2/1587 useless extension candidates. Maximal degree in co-relation 6252. Up to 1299 conditions per place. [2024-06-04 16:01:05,599 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 78 selfloop transitions, 35 changer transitions 0/120 dead transitions. [2024-06-04 16:01:05,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 120 transitions, 936 flow [2024-06-04 16:01:05,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:01:05,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:01:05,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-04 16:01:05,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 16:01:05,601 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 458 flow. Second operand 9 states and 222 transitions. [2024-06-04 16:01:05,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 120 transitions, 936 flow [2024-06-04 16:01:05,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 120 transitions, 888 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:05,610 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 582 flow [2024-06-04 16:01:05,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=582, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2024-06-04 16:01:05,611 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-04 16:01:05,611 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 582 flow [2024-06-04 16:01:05,611 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) [2024-06-04 16:01:05,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:05,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:05,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 16:01:05,612 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)] === [2024-06-04 16:01:05,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:05,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1735659520, now seen corresponding path program 3 times [2024-06-04 16:01:05,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:05,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975774156] [2024-06-04 16:01:05,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:05,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:05,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:05,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975774156] [2024-06-04 16:01:05,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975774156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:05,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:05,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:05,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503964825] [2024-06-04 16:01:05,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:05,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:05,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:05,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:05,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:05,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:05,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 582 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) [2024-06-04 16:01:05,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:05,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:05,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:06,130 INFO L124 PetriNetUnfolderBase]: 952/1576 cut-off events. [2024-06-04 16:01:06,131 INFO L125 PetriNetUnfolderBase]: For 7815/7815 co-relation queries the response was YES. [2024-06-04 16:01:06,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6548 conditions, 1576 events. 952/1576 cut-off events. For 7815/7815 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8006 event pairs, 299 based on Foata normal form. 4/1574 useless extension candidates. Maximal degree in co-relation 6517. Up to 1291 conditions per place. [2024-06-04 16:01:06,139 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 72 selfloop transitions, 32 changer transitions 0/111 dead transitions. [2024-06-04 16:01:06,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 111 transitions, 906 flow [2024-06-04 16:01:06,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:06,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:06,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-04 16:01:06,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-04 16:01:06,141 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 582 flow. Second operand 8 states and 195 transitions. [2024-06-04 16:01:06,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 111 transitions, 906 flow [2024-06-04 16:01:06,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 111 transitions, 823 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:06,150 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 572 flow [2024-06-04 16:01:06,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=572, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2024-06-04 16:01:06,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-04 16:01:06,151 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 572 flow [2024-06-04 16:01:06,151 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) [2024-06-04 16:01:06,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:06,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:06,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 16:01:06,152 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:06,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:06,152 INFO L85 PathProgramCache]: Analyzing trace with hash 608205135, now seen corresponding path program 1 times [2024-06-04 16:01:06,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:06,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768776715] [2024-06-04 16:01:06,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:06,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:06,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:06,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768776715] [2024-06-04 16:01:06,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768776715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:06,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:06,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:06,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987053114] [2024-06-04 16:01:06,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:06,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:06,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:06,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:06,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:06,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:06,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 572 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:06,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:06,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:06,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:06,608 INFO L124 PetriNetUnfolderBase]: 963/1594 cut-off events. [2024-06-04 16:01:06,608 INFO L125 PetriNetUnfolderBase]: For 8815/8815 co-relation queries the response was YES. [2024-06-04 16:01:06,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6746 conditions, 1594 events. 963/1594 cut-off events. For 8815/8815 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8129 event pairs, 307 based on Foata normal form. 2/1587 useless extension candidates. Maximal degree in co-relation 6713. Up to 1351 conditions per place. [2024-06-04 16:01:06,618 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 63 selfloop transitions, 27 changer transitions 0/97 dead transitions. [2024-06-04 16:01:06,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 97 transitions, 818 flow [2024-06-04 16:01:06,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-04 16:01:06,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-04 16:01:06,619 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 572 flow. Second operand 5 states and 128 transitions. [2024-06-04 16:01:06,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 97 transitions, 818 flow [2024-06-04 16:01:06,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 97 transitions, 732 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 16:01:06,629 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 589 flow [2024-06-04 16:01:06,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=589, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2024-06-04 16:01:06,630 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-04 16:01:06,630 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 589 flow [2024-06-04 16:01:06,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:06,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:06,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:06,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 16:01:06,631 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)] === [2024-06-04 16:01:06,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:06,631 INFO L85 PathProgramCache]: Analyzing trace with hash 755814735, now seen corresponding path program 2 times [2024-06-04 16:01:06,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:06,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110800378] [2024-06-04 16:01:06,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:06,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:06,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:06,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:06,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110800378] [2024-06-04 16:01:06,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110800378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:06,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:06,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:06,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834974889] [2024-06-04 16:01:06,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:06,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:06,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:06,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:06,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:06,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:06,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 82 transitions, 589 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:06,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:06,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:06,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:07,130 INFO L124 PetriNetUnfolderBase]: 974/1618 cut-off events. [2024-06-04 16:01:07,130 INFO L125 PetriNetUnfolderBase]: For 9891/9891 co-relation queries the response was YES. [2024-06-04 16:01:07,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6906 conditions, 1618 events. 974/1618 cut-off events. For 9891/9891 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8249 event pairs, 300 based on Foata normal form. 2/1614 useless extension candidates. Maximal degree in co-relation 6873. Up to 1315 conditions per place. [2024-06-04 16:01:07,140 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 74 selfloop transitions, 36 changer transitions 0/117 dead transitions. [2024-06-04 16:01:07,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 117 transitions, 961 flow [2024-06-04 16:01:07,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:07,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:07,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-04 16:01:07,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-04 16:01:07,142 INFO L175 Difference]: Start difference. First operand has 76 places, 82 transitions, 589 flow. Second operand 8 states and 194 transitions. [2024-06-04 16:01:07,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 117 transitions, 961 flow [2024-06-04 16:01:07,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 117 transitions, 908 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:07,155 INFO L231 Difference]: Finished difference. Result has 81 places, 85 transitions, 645 flow [2024-06-04 16:01:07,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=645, PETRI_PLACES=81, PETRI_TRANSITIONS=85} [2024-06-04 16:01:07,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-04 16:01:07,156 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 85 transitions, 645 flow [2024-06-04 16:01:07,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:07,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:07,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:07,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 16:01:07,157 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)] === [2024-06-04 16:01:07,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:07,157 INFO L85 PathProgramCache]: Analyzing trace with hash 756022125, now seen corresponding path program 3 times [2024-06-04 16:01:07,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:07,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109176763] [2024-06-04 16:01:07,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:07,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:07,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:07,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:07,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:07,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109176763] [2024-06-04 16:01:07,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109176763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:07,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:07,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:07,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605497962] [2024-06-04 16:01:07,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:07,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:07,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:07,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:07,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:07,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:07,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 85 transitions, 645 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:07,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:07,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:07,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:07,722 INFO L124 PetriNetUnfolderBase]: 969/1611 cut-off events. [2024-06-04 16:01:07,722 INFO L125 PetriNetUnfolderBase]: For 11320/11320 co-relation queries the response was YES. [2024-06-04 16:01:07,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7033 conditions, 1611 events. 969/1611 cut-off events. For 11320/11320 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8235 event pairs, 300 based on Foata normal form. 2/1607 useless extension candidates. Maximal degree in co-relation 6999. Up to 1310 conditions per place. [2024-06-04 16:01:07,732 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 71 selfloop transitions, 41 changer transitions 0/119 dead transitions. [2024-06-04 16:01:07,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 119 transitions, 955 flow [2024-06-04 16:01:07,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:01:07,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:01:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-04 16:01:07,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-04 16:01:07,734 INFO L175 Difference]: Start difference. First operand has 81 places, 85 transitions, 645 flow. Second operand 9 states and 213 transitions. [2024-06-04 16:01:07,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 119 transitions, 955 flow [2024-06-04 16:01:07,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 119 transitions, 875 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:07,748 INFO L231 Difference]: Finished difference. Result has 86 places, 85 transitions, 655 flow [2024-06-04 16:01:07,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=655, PETRI_PLACES=86, PETRI_TRANSITIONS=85} [2024-06-04 16:01:07,749 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-04 16:01:07,749 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 85 transitions, 655 flow [2024-06-04 16:01:07,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:07,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:07,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:07,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 16:01:07,750 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:07,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:07,750 INFO L85 PathProgramCache]: Analyzing trace with hash 311402351, now seen corresponding path program 1 times [2024-06-04 16:01:07,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:07,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969584771] [2024-06-04 16:01:07,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:07,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:07,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:07,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969584771] [2024-06-04 16:01:07,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969584771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:07,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:07,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:01:07,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726168204] [2024-06-04 16:01:07,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:07,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:01:08,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:08,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:01:08,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:01:08,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:01:08,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 655 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:08,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:08,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:01:08,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:08,190 INFO L124 PetriNetUnfolderBase]: 911/1566 cut-off events. [2024-06-04 16:01:08,190 INFO L125 PetriNetUnfolderBase]: For 12550/12550 co-relation queries the response was YES. [2024-06-04 16:01:08,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6926 conditions, 1566 events. 911/1566 cut-off events. For 12550/12550 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8197 event pairs, 293 based on Foata normal form. 2/1565 useless extension candidates. Maximal degree in co-relation 6891. Up to 1310 conditions per place. [2024-06-04 16:01:08,201 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 80 selfloop transitions, 17 changer transitions 0/110 dead transitions. [2024-06-04 16:01:08,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 110 transitions, 967 flow [2024-06-04 16:01:08,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:08,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-04 16:01:08,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-06-04 16:01:08,202 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 655 flow. Second operand 5 states and 127 transitions. [2024-06-04 16:01:08,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 110 transitions, 967 flow [2024-06-04 16:01:08,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 110 transitions, 872 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 16:01:08,217 INFO L231 Difference]: Finished difference. Result has 84 places, 94 transitions, 669 flow [2024-06-04 16:01:08,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=669, PETRI_PLACES=84, PETRI_TRANSITIONS=94} [2024-06-04 16:01:08,217 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-04 16:01:08,218 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 94 transitions, 669 flow [2024-06-04 16:01:08,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:08,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:08,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:08,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 16:01:08,218 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:08,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:08,219 INFO L85 PathProgramCache]: Analyzing trace with hash 2041852043, now seen corresponding path program 1 times [2024-06-04 16:01:08,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:08,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134996144] [2024-06-04 16:01:08,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:08,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:08,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:08,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134996144] [2024-06-04 16:01:08,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134996144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:08,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:08,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:08,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507899181] [2024-06-04 16:01:08,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:08,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:08,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:08,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:08,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:08,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:08,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 94 transitions, 669 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:08,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:08,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:08,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:08,713 INFO L124 PetriNetUnfolderBase]: 996/1661 cut-off events. [2024-06-04 16:01:08,714 INFO L125 PetriNetUnfolderBase]: For 14614/14614 co-relation queries the response was YES. [2024-06-04 16:01:08,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7512 conditions, 1661 events. 996/1661 cut-off events. For 14614/14614 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8533 event pairs, 304 based on Foata normal form. 4/1659 useless extension candidates. Maximal degree in co-relation 7475. Up to 1416 conditions per place. [2024-06-04 16:01:08,723 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 89 selfloop transitions, 20 changer transitions 0/116 dead transitions. [2024-06-04 16:01:08,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 116 transitions, 955 flow [2024-06-04 16:01:08,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:08,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 16:01:08,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-04 16:01:08,724 INFO L175 Difference]: Start difference. First operand has 84 places, 94 transitions, 669 flow. Second operand 6 states and 146 transitions. [2024-06-04 16:01:08,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 116 transitions, 955 flow [2024-06-04 16:01:08,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 116 transitions, 939 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-04 16:01:08,739 INFO L231 Difference]: Finished difference. Result has 90 places, 96 transitions, 722 flow [2024-06-04 16:01:08,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=722, PETRI_PLACES=90, PETRI_TRANSITIONS=96} [2024-06-04 16:01:08,739 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-04 16:01:08,740 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 96 transitions, 722 flow [2024-06-04 16:01:08,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:08,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:08,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:08,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 16:01:08,740 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)] === [2024-06-04 16:01:08,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:08,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1792770143, now seen corresponding path program 2 times [2024-06-04 16:01:08,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:08,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369148839] [2024-06-04 16:01:08,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:08,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:08,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:08,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369148839] [2024-06-04 16:01:08,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369148839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:08,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:08,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:08,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936194445] [2024-06-04 16:01:08,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:08,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:08,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:08,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:08,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:08,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:08,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 96 transitions, 722 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:08,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:08,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:08,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:09,167 INFO L124 PetriNetUnfolderBase]: 988/1654 cut-off events. [2024-06-04 16:01:09,167 INFO L125 PetriNetUnfolderBase]: For 16328/16328 co-relation queries the response was YES. [2024-06-04 16:01:09,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7736 conditions, 1654 events. 988/1654 cut-off events. For 16328/16328 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8545 event pairs, 273 based on Foata normal form. 4/1652 useless extension candidates. Maximal degree in co-relation 7696. Up to 1345 conditions per place. [2024-06-04 16:01:09,178 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 90 selfloop transitions, 22 changer transitions 0/119 dead transitions. [2024-06-04 16:01:09,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 119 transitions, 1020 flow [2024-06-04 16:01:09,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:09,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:09,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 16:01:09,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-04 16:01:09,179 INFO L175 Difference]: Start difference. First operand has 90 places, 96 transitions, 722 flow. Second operand 6 states and 146 transitions. [2024-06-04 16:01:09,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 119 transitions, 1020 flow [2024-06-04 16:01:09,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 119 transitions, 969 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:09,195 INFO L231 Difference]: Finished difference. Result has 92 places, 98 transitions, 748 flow [2024-06-04 16:01:09,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=748, PETRI_PLACES=92, PETRI_TRANSITIONS=98} [2024-06-04 16:01:09,195 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-04 16:01:09,196 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 98 transitions, 748 flow [2024-06-04 16:01:09,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:09,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:09,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:09,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 16:01:09,196 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:09,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:09,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1323494667, now seen corresponding path program 2 times [2024-06-04 16:01:09,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:09,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653674490] [2024-06-04 16:01:09,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:09,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:09,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:09,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653674490] [2024-06-04 16:01:09,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653674490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:09,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:09,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:01:09,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649715090] [2024-06-04 16:01:09,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:09,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:01:09,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:09,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:01:09,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:01:09,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:01:09,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 98 transitions, 748 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:09,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:09,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:01:09,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:09,690 INFO L124 PetriNetUnfolderBase]: 914/1586 cut-off events. [2024-06-04 16:01:09,690 INFO L125 PetriNetUnfolderBase]: For 17415/17415 co-relation queries the response was YES. [2024-06-04 16:01:09,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7526 conditions, 1586 events. 914/1586 cut-off events. For 17415/17415 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8369 event pairs, 296 based on Foata normal form. 4/1587 useless extension candidates. Maximal degree in co-relation 7485. Up to 1321 conditions per place. [2024-06-04 16:01:09,701 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 81 selfloop transitions, 19 changer transitions 0/115 dead transitions. [2024-06-04 16:01:09,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 115 transitions, 1010 flow [2024-06-04 16:01:09,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:01:09,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:01:09,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-04 16:01:09,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6488095238095238 [2024-06-04 16:01:09,702 INFO L175 Difference]: Start difference. First operand has 92 places, 98 transitions, 748 flow. Second operand 4 states and 109 transitions. [2024-06-04 16:01:09,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 115 transitions, 1010 flow [2024-06-04 16:01:09,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 115 transitions, 945 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:09,726 INFO L231 Difference]: Finished difference. Result has 92 places, 101 transitions, 769 flow [2024-06-04 16:01:09,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=769, PETRI_PLACES=92, PETRI_TRANSITIONS=101} [2024-06-04 16:01:09,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-04 16:01:09,727 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 101 transitions, 769 flow [2024-06-04 16:01:09,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:09,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:09,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:09,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 16:01:09,727 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)] === [2024-06-04 16:01:09,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:09,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1791327585, now seen corresponding path program 1 times [2024-06-04 16:01:09,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:09,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356812204] [2024-06-04 16:01:09,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:09,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:09,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:09,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356812204] [2024-06-04 16:01:09,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356812204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:09,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:09,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:09,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231857457] [2024-06-04 16:01:09,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:09,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:09,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:09,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:09,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:10,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:10,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 101 transitions, 769 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) [2024-06-04 16:01:10,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:10,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:10,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:10,345 INFO L124 PetriNetUnfolderBase]: 1034/1728 cut-off events. [2024-06-04 16:01:10,345 INFO L125 PetriNetUnfolderBase]: For 20331/20331 co-relation queries the response was YES. [2024-06-04 16:01:10,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8546 conditions, 1728 events. 1034/1728 cut-off events. For 20331/20331 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8890 event pairs, 180 based on Foata normal form. 4/1729 useless extension candidates. Maximal degree in co-relation 8504. Up to 1443 conditions per place. [2024-06-04 16:01:10,360 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 107 selfloop transitions, 21 changer transitions 0/135 dead transitions. [2024-06-04 16:01:10,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 135 transitions, 1215 flow [2024-06-04 16:01:10,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:10,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 16:01:10,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-04 16:01:10,362 INFO L175 Difference]: Start difference. First operand has 92 places, 101 transitions, 769 flow. Second operand 7 states and 171 transitions. [2024-06-04 16:01:10,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 135 transitions, 1215 flow [2024-06-04 16:01:10,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 135 transitions, 1181 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:10,385 INFO L231 Difference]: Finished difference. Result has 97 places, 105 transitions, 840 flow [2024-06-04 16:01:10,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=840, PETRI_PLACES=97, PETRI_TRANSITIONS=105} [2024-06-04 16:01:10,385 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-04 16:01:10,385 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 105 transitions, 840 flow [2024-06-04 16:01:10,386 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) [2024-06-04 16:01:10,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:10,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:10,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 16:01:10,386 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)] === [2024-06-04 16:01:10,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:10,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1791388035, now seen corresponding path program 2 times [2024-06-04 16:01:10,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:10,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333423533] [2024-06-04 16:01:10,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:10,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:10,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:10,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333423533] [2024-06-04 16:01:10,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333423533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:10,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:10,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:10,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864873356] [2024-06-04 16:01:10,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:10,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:10,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:10,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:10,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:10,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:10,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 105 transitions, 840 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) [2024-06-04 16:01:10,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:10,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:10,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:10,992 INFO L124 PetriNetUnfolderBase]: 1026/1716 cut-off events. [2024-06-04 16:01:10,992 INFO L125 PetriNetUnfolderBase]: For 22153/22153 co-relation queries the response was YES. [2024-06-04 16:01:10,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8687 conditions, 1716 events. 1026/1716 cut-off events. For 22153/22153 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8868 event pairs, 264 based on Foata normal form. 4/1717 useless extension candidates. Maximal degree in co-relation 8644. Up to 1490 conditions per place. [2024-06-04 16:01:11,004 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 104 selfloop transitions, 17 changer transitions 0/128 dead transitions. [2024-06-04 16:01:11,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 128 transitions, 1140 flow [2024-06-04 16:01:11,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:11,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:11,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 16:01:11,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:01:11,006 INFO L175 Difference]: Start difference. First operand has 97 places, 105 transitions, 840 flow. Second operand 6 states and 147 transitions. [2024-06-04 16:01:11,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 128 transitions, 1140 flow [2024-06-04 16:01:11,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 128 transitions, 1080 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:11,030 INFO L231 Difference]: Finished difference. Result has 100 places, 105 transitions, 821 flow [2024-06-04 16:01:11,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=821, PETRI_PLACES=100, PETRI_TRANSITIONS=105} [2024-06-04 16:01:11,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-04 16:01:11,031 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 105 transitions, 821 flow [2024-06-04 16:01:11,031 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) [2024-06-04 16:01:11,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:11,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:11,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 16:01:11,032 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:11,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:11,032 INFO L85 PathProgramCache]: Analyzing trace with hash 2075114849, now seen corresponding path program 3 times [2024-06-04 16:01:11,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:11,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643499432] [2024-06-04 16:01:11,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:11,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:11,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:11,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643499432] [2024-06-04 16:01:11,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643499432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:11,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:11,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:11,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11177307] [2024-06-04 16:01:11,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:11,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:11,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:11,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:11,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:11,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:11,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 105 transitions, 821 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) [2024-06-04 16:01:11,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:11,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:11,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:11,597 INFO L124 PetriNetUnfolderBase]: 1043/1740 cut-off events. [2024-06-04 16:01:11,598 INFO L125 PetriNetUnfolderBase]: For 24713/24716 co-relation queries the response was YES. [2024-06-04 16:01:11,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8879 conditions, 1740 events. 1043/1740 cut-off events. For 24713/24716 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8971 event pairs, 276 based on Foata normal form. 4/1737 useless extension candidates. Maximal degree in co-relation 8834. Up to 1408 conditions per place. [2024-06-04 16:01:11,613 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 99 selfloop transitions, 43 changer transitions 0/149 dead transitions. [2024-06-04 16:01:11,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 149 transitions, 1241 flow [2024-06-04 16:01:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:01:11,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:01:11,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-04 16:01:11,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569047619047619 [2024-06-04 16:01:11,617 INFO L175 Difference]: Start difference. First operand has 100 places, 105 transitions, 821 flow. Second operand 10 states and 239 transitions. [2024-06-04 16:01:11,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 149 transitions, 1241 flow [2024-06-04 16:01:11,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 149 transitions, 1202 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:11,641 INFO L231 Difference]: Finished difference. Result has 105 places, 107 transitions, 909 flow [2024-06-04 16:01:11,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=909, PETRI_PLACES=105, PETRI_TRANSITIONS=107} [2024-06-04 16:01:11,641 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-04 16:01:11,641 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 107 transitions, 909 flow [2024-06-04 16:01:11,642 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) [2024-06-04 16:01:11,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:11,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:11,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 16:01:11,642 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:11,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:11,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1440300952, now seen corresponding path program 1 times [2024-06-04 16:01:11,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:11,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817483826] [2024-06-04 16:01:11,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:11,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:11,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:11,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817483826] [2024-06-04 16:01:11,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817483826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:11,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:11,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:11,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439973711] [2024-06-04 16:01:11,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:11,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:11,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:11,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:11,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:11,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:01:11,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 107 transitions, 909 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:11,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:11,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:01:11,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:12,119 INFO L124 PetriNetUnfolderBase]: 970/1674 cut-off events. [2024-06-04 16:01:12,119 INFO L125 PetriNetUnfolderBase]: For 26687/26696 co-relation queries the response was YES. [2024-06-04 16:01:12,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8872 conditions, 1674 events. 970/1674 cut-off events. For 26687/26696 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8872 event pairs, 265 based on Foata normal form. 4/1675 useless extension candidates. Maximal degree in co-relation 8826. Up to 1392 conditions per place. [2024-06-04 16:01:12,131 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 88 selfloop transitions, 27 changer transitions 0/130 dead transitions. [2024-06-04 16:01:12,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 130 transitions, 1285 flow [2024-06-04 16:01:12,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:12,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:12,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 16:01:12,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 16:01:12,133 INFO L175 Difference]: Start difference. First operand has 105 places, 107 transitions, 909 flow. Second operand 6 states and 148 transitions. [2024-06-04 16:01:12,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 130 transitions, 1285 flow [2024-06-04 16:01:12,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 130 transitions, 1176 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-04 16:01:12,161 INFO L231 Difference]: Finished difference. Result has 103 places, 113 transitions, 930 flow [2024-06-04 16:01:12,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=930, PETRI_PLACES=103, PETRI_TRANSITIONS=113} [2024-06-04 16:01:12,162 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-04 16:01:12,162 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 113 transitions, 930 flow [2024-06-04 16:01:12,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:12,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:12,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:12,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 16:01:12,163 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)] === [2024-06-04 16:01:12,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:12,164 INFO L85 PathProgramCache]: Analyzing trace with hash -495356575, now seen corresponding path program 4 times [2024-06-04 16:01:12,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:12,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138126447] [2024-06-04 16:01:12,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:12,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:12,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:12,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138126447] [2024-06-04 16:01:12,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138126447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:12,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:12,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:12,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473116847] [2024-06-04 16:01:12,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:12,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:12,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:12,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:12,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:12,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:12,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 113 transitions, 930 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) [2024-06-04 16:01:12,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:12,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:12,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:12,761 INFO L124 PetriNetUnfolderBase]: 1103/1842 cut-off events. [2024-06-04 16:01:12,761 INFO L125 PetriNetUnfolderBase]: For 32881/32881 co-relation queries the response was YES. [2024-06-04 16:01:12,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9698 conditions, 1842 events. 1103/1842 cut-off events. For 32881/32881 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9710 event pairs, 280 based on Foata normal form. 20/1856 useless extension candidates. Maximal degree in co-relation 9651. Up to 1416 conditions per place. [2024-06-04 16:01:12,775 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 106 selfloop transitions, 40 changer transitions 0/153 dead transitions. [2024-06-04 16:01:12,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 153 transitions, 1366 flow [2024-06-04 16:01:12,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:01:12,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:01:12,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-04 16:01:12,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-04 16:01:12,777 INFO L175 Difference]: Start difference. First operand has 103 places, 113 transitions, 930 flow. Second operand 9 states and 217 transitions. [2024-06-04 16:01:12,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 153 transitions, 1366 flow [2024-06-04 16:01:12,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 153 transitions, 1327 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:12,803 INFO L231 Difference]: Finished difference. Result has 110 places, 115 transitions, 1017 flow [2024-06-04 16:01:12,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1017, PETRI_PLACES=110, PETRI_TRANSITIONS=115} [2024-06-04 16:01:12,804 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-04 16:01:12,804 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 115 transitions, 1017 flow [2024-06-04 16:01:12,804 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) [2024-06-04 16:01:12,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:12,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:12,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 16:01:12,804 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:12,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:12,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1558727130, now seen corresponding path program 2 times [2024-06-04 16:01:12,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:12,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37041360] [2024-06-04 16:01:12,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:12,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:13,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:13,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37041360] [2024-06-04 16:01:13,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37041360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:13,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:13,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:13,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752380200] [2024-06-04 16:01:13,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:13,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:13,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:13,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:13,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:13,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:01:13,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 115 transitions, 1017 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:13,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:13,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:01:13,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:13,343 INFO L124 PetriNetUnfolderBase]: 1014/1752 cut-off events. [2024-06-04 16:01:13,344 INFO L125 PetriNetUnfolderBase]: For 31603/31612 co-relation queries the response was YES. [2024-06-04 16:01:13,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9544 conditions, 1752 events. 1014/1752 cut-off events. For 31603/31612 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9422 event pairs, 272 based on Foata normal form. 11/1760 useless extension candidates. Maximal degree in co-relation 9495. Up to 1485 conditions per place. [2024-06-04 16:01:13,357 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 93 selfloop transitions, 22 changer transitions 0/130 dead transitions. [2024-06-04 16:01:13,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 130 transitions, 1285 flow [2024-06-04 16:01:13,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:13,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-04 16:01:13,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-04 16:01:13,359 INFO L175 Difference]: Start difference. First operand has 110 places, 115 transitions, 1017 flow. Second operand 5 states and 128 transitions. [2024-06-04 16:01:13,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 130 transitions, 1285 flow [2024-06-04 16:01:13,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 130 transitions, 1179 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 16:01:13,391 INFO L231 Difference]: Finished difference. Result has 108 places, 115 transitions, 961 flow [2024-06-04 16:01:13,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=961, PETRI_PLACES=108, PETRI_TRANSITIONS=115} [2024-06-04 16:01:13,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-04 16:01:13,392 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 115 transitions, 961 flow [2024-06-04 16:01:13,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:13,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:13,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:13,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 16:01:13,393 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:13,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:13,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1233552404, now seen corresponding path program 1 times [2024-06-04 16:01:13,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:13,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100473917] [2024-06-04 16:01:13,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:13,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:13,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:13,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100473917] [2024-06-04 16:01:13,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100473917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:13,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:13,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:13,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419304497] [2024-06-04 16:01:13,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:13,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:13,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:13,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:13,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:13,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:13,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 115 transitions, 961 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:13,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:13,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:13,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:13,883 INFO L124 PetriNetUnfolderBase]: 1115/1873 cut-off events. [2024-06-04 16:01:13,884 INFO L125 PetriNetUnfolderBase]: For 33869/33869 co-relation queries the response was YES. [2024-06-04 16:01:13,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9941 conditions, 1873 events. 1115/1873 cut-off events. For 33869/33869 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9973 event pairs, 277 based on Foata normal form. 2/1869 useless extension candidates. Maximal degree in co-relation 9891. Up to 1576 conditions per place. [2024-06-04 16:01:13,897 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 111 selfloop transitions, 34 changer transitions 0/152 dead transitions. [2024-06-04 16:01:13,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 152 transitions, 1539 flow [2024-06-04 16:01:13,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:13,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:13,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 16:01:13,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 16:01:13,899 INFO L175 Difference]: Start difference. First operand has 108 places, 115 transitions, 961 flow. Second operand 6 states and 148 transitions. [2024-06-04 16:01:13,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 152 transitions, 1539 flow [2024-06-04 16:01:13,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 152 transitions, 1463 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:13,931 INFO L231 Difference]: Finished difference. Result has 112 places, 133 transitions, 1156 flow [2024-06-04 16:01:13,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1156, PETRI_PLACES=112, PETRI_TRANSITIONS=133} [2024-06-04 16:01:13,932 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-04 16:01:13,932 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 133 transitions, 1156 flow [2024-06-04 16:01:13,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:13,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:13,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:13,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 16:01:13,933 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:13,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:13,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1233432434, now seen corresponding path program 2 times [2024-06-04 16:01:13,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:13,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701402478] [2024-06-04 16:01:13,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:13,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:14,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:14,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701402478] [2024-06-04 16:01:14,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701402478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:14,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:14,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:14,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777185263] [2024-06-04 16:01:14,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:14,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:14,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:14,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:14,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:14,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:14,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 133 transitions, 1156 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:14,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:14,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:14,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:14,486 INFO L124 PetriNetUnfolderBase]: 1181/1988 cut-off events. [2024-06-04 16:01:14,487 INFO L125 PetriNetUnfolderBase]: For 38795/38795 co-relation queries the response was YES. [2024-06-04 16:01:14,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11101 conditions, 1988 events. 1181/1988 cut-off events. For 38795/38795 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10676 event pairs, 271 based on Foata normal form. 4/1989 useless extension candidates. Maximal degree in co-relation 11048. Up to 1733 conditions per place. [2024-06-04 16:01:14,501 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 128 selfloop transitions, 35 changer transitions 0/170 dead transitions. [2024-06-04 16:01:14,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 170 transitions, 1784 flow [2024-06-04 16:01:14,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:14,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:14,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 16:01:14,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-04 16:01:14,502 INFO L175 Difference]: Start difference. First operand has 112 places, 133 transitions, 1156 flow. Second operand 7 states and 163 transitions. [2024-06-04 16:01:14,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 170 transitions, 1784 flow [2024-06-04 16:01:14,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 170 transitions, 1736 flow, removed 24 selfloop flow, removed 0 redundant places. [2024-06-04 16:01:14,545 INFO L231 Difference]: Finished difference. Result has 120 places, 153 transitions, 1437 flow [2024-06-04 16:01:14,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1437, PETRI_PLACES=120, PETRI_TRANSITIONS=153} [2024-06-04 16:01:14,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-04 16:01:14,546 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 153 transitions, 1437 flow [2024-06-04 16:01:14,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:14,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:14,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:14,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 16:01:14,546 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:14,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:14,547 INFO L85 PathProgramCache]: Analyzing trace with hash -497410014, now seen corresponding path program 3 times [2024-06-04 16:01:14,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:14,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14012470] [2024-06-04 16:01:14,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:14,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:14,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:14,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14012470] [2024-06-04 16:01:14,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14012470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:14,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:14,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:14,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39681281] [2024-06-04 16:01:14,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:14,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:14,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:14,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:14,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:14,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:14,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 153 transitions, 1437 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:14,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:14,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:14,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:15,113 INFO L124 PetriNetUnfolderBase]: 1229/2069 cut-off events. [2024-06-04 16:01:15,113 INFO L125 PetriNetUnfolderBase]: For 43926/43926 co-relation queries the response was YES. [2024-06-04 16:01:15,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12132 conditions, 2069 events. 1229/2069 cut-off events. For 43926/43926 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11168 event pairs, 271 based on Foata normal form. 4/2070 useless extension candidates. Maximal degree in co-relation 12075. Up to 1695 conditions per place. [2024-06-04 16:01:15,129 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 123 selfloop transitions, 70 changer transitions 0/200 dead transitions. [2024-06-04 16:01:15,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 200 transitions, 2171 flow [2024-06-04 16:01:15,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:15,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:15,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-04 16:01:15,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-04 16:01:15,130 INFO L175 Difference]: Start difference. First operand has 120 places, 153 transitions, 1437 flow. Second operand 7 states and 178 transitions. [2024-06-04 16:01:15,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 200 transitions, 2171 flow [2024-06-04 16:01:15,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 200 transitions, 2074 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:15,183 INFO L231 Difference]: Finished difference. Result has 127 places, 172 transitions, 1812 flow [2024-06-04 16:01:15,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1812, PETRI_PLACES=127, PETRI_TRANSITIONS=172} [2024-06-04 16:01:15,183 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-04 16:01:15,183 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 172 transitions, 1812 flow [2024-06-04 16:01:15,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:15,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:15,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:15,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 16:01:15,184 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)] === [2024-06-04 16:01:15,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:15,184 INFO L85 PathProgramCache]: Analyzing trace with hash -535594140, now seen corresponding path program 1 times [2024-06-04 16:01:15,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:15,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280019964] [2024-06-04 16:01:15,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:15,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:15,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:15,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:15,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280019964] [2024-06-04 16:01:15,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280019964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:15,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:15,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:15,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522168272] [2024-06-04 16:01:15,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:15,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:15,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:15,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:15,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:15,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:01:15,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 172 transitions, 1812 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:15,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:15,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:01:15,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:15,726 INFO L124 PetriNetUnfolderBase]: 1162/2000 cut-off events. [2024-06-04 16:01:15,726 INFO L125 PetriNetUnfolderBase]: For 47103/47103 co-relation queries the response was YES. [2024-06-04 16:01:15,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12420 conditions, 2000 events. 1162/2000 cut-off events. For 47103/47103 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10996 event pairs, 270 based on Foata normal form. 2/1999 useless extension candidates. Maximal degree in co-relation 12359. Up to 1647 conditions per place. [2024-06-04 16:01:15,744 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 144 selfloop transitions, 10 changer transitions 0/183 dead transitions. [2024-06-04 16:01:15,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 183 transitions, 2172 flow [2024-06-04 16:01:15,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:01:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:01:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-04 16:01:15,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-04 16:01:15,746 INFO L175 Difference]: Start difference. First operand has 127 places, 172 transitions, 1812 flow. Second operand 4 states and 101 transitions. [2024-06-04 16:01:15,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 183 transitions, 2172 flow [2024-06-04 16:01:15,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 183 transitions, 2081 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:15,810 INFO L231 Difference]: Finished difference. Result has 129 places, 174 transitions, 1780 flow [2024-06-04 16:01:15,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1723, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1780, PETRI_PLACES=129, PETRI_TRANSITIONS=174} [2024-06-04 16:01:15,815 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-04 16:01:15,815 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 174 transitions, 1780 flow [2024-06-04 16:01:15,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:15,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:15,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:15,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 16:01:15,816 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:15,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:15,818 INFO L85 PathProgramCache]: Analyzing trace with hash -303418928, now seen corresponding path program 1 times [2024-06-04 16:01:15,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:15,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627811205] [2024-06-04 16:01:15,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:15,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:16,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:16,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627811205] [2024-06-04 16:01:16,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627811205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:16,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:16,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:16,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375620264] [2024-06-04 16:01:16,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:16,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:16,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:16,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:16,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:16,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:16,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 174 transitions, 1780 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:16,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:16,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:16,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:16,462 INFO L124 PetriNetUnfolderBase]: 1351/2285 cut-off events. [2024-06-04 16:01:16,462 INFO L125 PetriNetUnfolderBase]: For 55422/55422 co-relation queries the response was YES. [2024-06-04 16:01:16,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13918 conditions, 2285 events. 1351/2285 cut-off events. For 55422/55422 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 12848 event pairs, 175 based on Foata normal form. 12/2288 useless extension candidates. Maximal degree in co-relation 13855. Up to 1603 conditions per place. [2024-06-04 16:01:16,539 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 167 selfloop transitions, 35 changer transitions 0/209 dead transitions. [2024-06-04 16:01:16,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 209 transitions, 2424 flow [2024-06-04 16:01:16,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:16,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:16,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-04 16:01:16,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-04 16:01:16,541 INFO L175 Difference]: Start difference. First operand has 129 places, 174 transitions, 1780 flow. Second operand 7 states and 177 transitions. [2024-06-04 16:01:16,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 209 transitions, 2424 flow [2024-06-04 16:01:16,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 209 transitions, 2383 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:16,597 INFO L231 Difference]: Finished difference. Result has 134 places, 176 transitions, 1861 flow [2024-06-04 16:01:16,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1739, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1861, PETRI_PLACES=134, PETRI_TRANSITIONS=176} [2024-06-04 16:01:16,598 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-04 16:01:16,598 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 176 transitions, 1861 flow [2024-06-04 16:01:16,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:16,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:16,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:16,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 16:01:16,599 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:16,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:16,599 INFO L85 PathProgramCache]: Analyzing trace with hash 356189602, now seen corresponding path program 2 times [2024-06-04 16:01:16,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:16,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267173402] [2024-06-04 16:01:16,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:16,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:16,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:16,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267173402] [2024-06-04 16:01:16,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267173402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:16,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:16,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:16,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695035384] [2024-06-04 16:01:16,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:16,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:16,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:16,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:16,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:16,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:16,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 176 transitions, 1861 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:16,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:16,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:16,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:17,226 INFO L124 PetriNetUnfolderBase]: 1392/2356 cut-off events. [2024-06-04 16:01:17,226 INFO L125 PetriNetUnfolderBase]: For 59493/59493 co-relation queries the response was YES. [2024-06-04 16:01:17,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14543 conditions, 2356 events. 1392/2356 cut-off events. For 59493/59493 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 13389 event pairs, 258 based on Foata normal form. 12/2359 useless extension candidates. Maximal degree in co-relation 14479. Up to 1737 conditions per place. [2024-06-04 16:01:17,246 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 166 selfloop transitions, 32 changer transitions 0/205 dead transitions. [2024-06-04 16:01:17,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 205 transitions, 2469 flow [2024-06-04 16:01:17,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:17,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:17,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-04 16:01:17,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-04 16:01:17,247 INFO L175 Difference]: Start difference. First operand has 134 places, 176 transitions, 1861 flow. Second operand 6 states and 155 transitions. [2024-06-04 16:01:17,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 205 transitions, 2469 flow [2024-06-04 16:01:17,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 205 transitions, 2425 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:17,323 INFO L231 Difference]: Finished difference. Result has 137 places, 177 transitions, 1911 flow [2024-06-04 16:01:17,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1817, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1911, PETRI_PLACES=137, PETRI_TRANSITIONS=177} [2024-06-04 16:01:17,324 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-04 16:01:17,324 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 177 transitions, 1911 flow [2024-06-04 16:01:17,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:17,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:17,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:17,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 16:01:17,325 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)] === [2024-06-04 16:01:17,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:17,325 INFO L85 PathProgramCache]: Analyzing trace with hash 359310702, now seen corresponding path program 3 times [2024-06-04 16:01:17,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:17,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490457201] [2024-06-04 16:01:17,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:17,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:17,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:17,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490457201] [2024-06-04 16:01:17,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490457201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:17,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:17,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:17,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632799226] [2024-06-04 16:01:17,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:17,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:17,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:17,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:17,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:17,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:17,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 177 transitions, 1911 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:17,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:17,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:17,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:17,921 INFO L124 PetriNetUnfolderBase]: 1364/2317 cut-off events. [2024-06-04 16:01:17,921 INFO L125 PetriNetUnfolderBase]: For 60024/60024 co-relation queries the response was YES. [2024-06-04 16:01:17,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14146 conditions, 2317 events. 1364/2317 cut-off events. For 60024/60024 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13136 event pairs, 252 based on Foata normal form. 16/2324 useless extension candidates. Maximal degree in co-relation 14080. Up to 1857 conditions per place. [2024-06-04 16:01:17,940 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 162 selfloop transitions, 31 changer transitions 0/200 dead transitions. [2024-06-04 16:01:17,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 200 transitions, 2373 flow [2024-06-04 16:01:17,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:17,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:17,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-04 16:01:17,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-04 16:01:17,942 INFO L175 Difference]: Start difference. First operand has 137 places, 177 transitions, 1911 flow. Second operand 6 states and 153 transitions. [2024-06-04 16:01:17,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 200 transitions, 2373 flow [2024-06-04 16:01:18,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 200 transitions, 2286 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:18,027 INFO L231 Difference]: Finished difference. Result has 139 places, 177 transitions, 1897 flow [2024-06-04 16:01:18,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1897, PETRI_PLACES=139, PETRI_TRANSITIONS=177} [2024-06-04 16:01:18,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-04 16:01:18,027 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 177 transitions, 1897 flow [2024-06-04 16:01:18,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:18,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:18,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:18,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 16:01:18,028 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)] === [2024-06-04 16:01:18,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:18,028 INFO L85 PathProgramCache]: Analyzing trace with hash 687809292, now seen corresponding path program 4 times [2024-06-04 16:01:18,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:18,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491646370] [2024-06-04 16:01:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:18,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:18,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:18,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491646370] [2024-06-04 16:01:18,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491646370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:18,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:18,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:18,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680113441] [2024-06-04 16:01:18,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:18,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:18,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:18,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:18,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:18,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:18,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 177 transitions, 1897 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:18,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:18,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:18,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:18,753 INFO L124 PetriNetUnfolderBase]: 1422/2405 cut-off events. [2024-06-04 16:01:18,754 INFO L125 PetriNetUnfolderBase]: For 63789/63789 co-relation queries the response was YES. [2024-06-04 16:01:18,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14622 conditions, 2405 events. 1422/2405 cut-off events. For 63789/63789 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13674 event pairs, 312 based on Foata normal form. 16/2415 useless extension candidates. Maximal degree in co-relation 14555. Up to 1941 conditions per place. [2024-06-04 16:01:18,770 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 171 selfloop transitions, 42 changer transitions 0/220 dead transitions. [2024-06-04 16:01:18,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 220 transitions, 2471 flow [2024-06-04 16:01:18,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:01:18,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:01:18,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-04 16:01:18,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-06-04 16:01:18,772 INFO L175 Difference]: Start difference. First operand has 139 places, 177 transitions, 1897 flow. Second operand 10 states and 236 transitions. [2024-06-04 16:01:18,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 220 transitions, 2471 flow [2024-06-04 16:01:18,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 220 transitions, 2396 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:18,839 INFO L231 Difference]: Finished difference. Result has 144 places, 178 transitions, 1939 flow [2024-06-04 16:01:18,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1822, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1939, PETRI_PLACES=144, PETRI_TRANSITIONS=178} [2024-06-04 16:01:18,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-04 16:01:18,840 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 178 transitions, 1939 flow [2024-06-04 16:01:18,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:18,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:18,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:18,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 16:01:18,841 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)] === [2024-06-04 16:01:18,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:18,841 INFO L85 PathProgramCache]: Analyzing trace with hash 488507502, now seen corresponding path program 5 times [2024-06-04 16:01:18,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:18,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462462748] [2024-06-04 16:01:18,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:18,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:19,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:19,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:19,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462462748] [2024-06-04 16:01:19,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462462748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:19,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:19,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:19,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446984682] [2024-06-04 16:01:19,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:19,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:19,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:19,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:19,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:19,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:19,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 178 transitions, 1939 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:19,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:19,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:19,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:19,484 INFO L124 PetriNetUnfolderBase]: 1480/2523 cut-off events. [2024-06-04 16:01:19,484 INFO L125 PetriNetUnfolderBase]: For 68435/68435 co-relation queries the response was YES. [2024-06-04 16:01:19,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15283 conditions, 2523 events. 1480/2523 cut-off events. For 68435/68435 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 14657 event pairs, 332 based on Foata normal form. 16/2533 useless extension candidates. Maximal degree in co-relation 15215. Up to 2039 conditions per place. [2024-06-04 16:01:19,505 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 173 selfloop transitions, 37 changer transitions 0/217 dead transitions. [2024-06-04 16:01:19,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 217 transitions, 2499 flow [2024-06-04 16:01:19,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:01:19,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:01:19,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-04 16:01:19,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-04 16:01:19,510 INFO L175 Difference]: Start difference. First operand has 144 places, 178 transitions, 1939 flow. Second operand 9 states and 215 transitions. [2024-06-04 16:01:19,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 217 transitions, 2499 flow [2024-06-04 16:01:19,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 217 transitions, 2402 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-04 16:01:19,604 INFO L231 Difference]: Finished difference. Result has 145 places, 179 transitions, 1951 flow [2024-06-04 16:01:19,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1842, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1951, PETRI_PLACES=145, PETRI_TRANSITIONS=179} [2024-06-04 16:01:19,605 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-04 16:01:19,605 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 179 transitions, 1951 flow [2024-06-04 16:01:19,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:19,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:19,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:19,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 16:01:19,606 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)] === [2024-06-04 16:01:19,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:19,621 INFO L85 PathProgramCache]: Analyzing trace with hash 488359632, now seen corresponding path program 6 times [2024-06-04 16:01:19,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:19,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343097770] [2024-06-04 16:01:19,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:19,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:19,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:19,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343097770] [2024-06-04 16:01:19,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343097770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:19,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:19,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:19,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612474862] [2024-06-04 16:01:19,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:19,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:19,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:19,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:19,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:20,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:20,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 179 transitions, 1951 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:20,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:20,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:20,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:20,481 INFO L124 PetriNetUnfolderBase]: 1496/2555 cut-off events. [2024-06-04 16:01:20,481 INFO L125 PetriNetUnfolderBase]: For 69155/69155 co-relation queries the response was YES. [2024-06-04 16:01:20,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15319 conditions, 2555 events. 1496/2555 cut-off events. For 69155/69155 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14867 event pairs, 325 based on Foata normal form. 12/2561 useless extension candidates. Maximal degree in co-relation 15250. Up to 1772 conditions per place. [2024-06-04 16:01:20,506 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 173 selfloop transitions, 41 changer transitions 0/221 dead transitions. [2024-06-04 16:01:20,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 221 transitions, 2535 flow [2024-06-04 16:01:20,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:01:20,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:01:20,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-04 16:01:20,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-04 16:01:20,507 INFO L175 Difference]: Start difference. First operand has 145 places, 179 transitions, 1951 flow. Second operand 9 states and 217 transitions. [2024-06-04 16:01:20,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 221 transitions, 2535 flow [2024-06-04 16:01:20,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 221 transitions, 2446 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 16:01:20,593 INFO L231 Difference]: Finished difference. Result has 147 places, 180 transitions, 1981 flow [2024-06-04 16:01:20,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1981, PETRI_PLACES=147, PETRI_TRANSITIONS=180} [2024-06-04 16:01:20,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-04 16:01:20,594 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 180 transitions, 1981 flow [2024-06-04 16:01:20,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:20,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:20,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:20,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 16:01:20,594 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:20,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:20,595 INFO L85 PathProgramCache]: Analyzing trace with hash 688024494, now seen corresponding path program 1 times [2024-06-04 16:01:20,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:20,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223364697] [2024-06-04 16:01:20,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:20,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:20,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:20,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223364697] [2024-06-04 16:01:20,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223364697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:20,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:20,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:20,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915295468] [2024-06-04 16:01:20,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:20,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:20,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:20,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:20,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:20,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:20,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 180 transitions, 1981 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:20,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:20,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:20,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:21,328 INFO L124 PetriNetUnfolderBase]: 1537/2636 cut-off events. [2024-06-04 16:01:21,329 INFO L125 PetriNetUnfolderBase]: For 73474/73474 co-relation queries the response was YES. [2024-06-04 16:01:21,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15780 conditions, 2636 events. 1537/2636 cut-off events. For 73474/73474 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15531 event pairs, 299 based on Foata normal form. 12/2642 useless extension candidates. Maximal degree in co-relation 15710. Up to 1853 conditions per place. [2024-06-04 16:01:21,349 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 171 selfloop transitions, 48 changer transitions 0/226 dead transitions. [2024-06-04 16:01:21,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 226 transitions, 2591 flow [2024-06-04 16:01:21,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:01:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:01:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-04 16:01:21,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569047619047619 [2024-06-04 16:01:21,352 INFO L175 Difference]: Start difference. First operand has 147 places, 180 transitions, 1981 flow. Second operand 10 states and 239 transitions. [2024-06-04 16:01:21,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 226 transitions, 2591 flow [2024-06-04 16:01:21,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 226 transitions, 2490 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-04 16:01:21,448 INFO L231 Difference]: Finished difference. Result has 150 places, 181 transitions, 2014 flow [2024-06-04 16:01:21,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1880, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2014, PETRI_PLACES=150, PETRI_TRANSITIONS=181} [2024-06-04 16:01:21,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-04 16:01:21,449 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 181 transitions, 2014 flow [2024-06-04 16:01:21,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:21,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:21,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:21,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 16:01:21,450 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)] === [2024-06-04 16:01:21,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:21,450 INFO L85 PathProgramCache]: Analyzing trace with hash 5781188, now seen corresponding path program 1 times [2024-06-04 16:01:21,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:21,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230327556] [2024-06-04 16:01:21,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:21,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:21,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:21,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230327556] [2024-06-04 16:01:21,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230327556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:21,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:21,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:21,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327383306] [2024-06-04 16:01:21,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:21,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:21,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:21,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:21,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:21,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:21,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 181 transitions, 2014 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:21,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:21,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:21,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:22,074 INFO L124 PetriNetUnfolderBase]: 1558/2668 cut-off events. [2024-06-04 16:01:22,074 INFO L125 PetriNetUnfolderBase]: For 73633/73636 co-relation queries the response was YES. [2024-06-04 16:01:22,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16149 conditions, 2668 events. 1558/2668 cut-off events. For 73633/73636 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15732 event pairs, 368 based on Foata normal form. 1/2661 useless extension candidates. Maximal degree in co-relation 16078. Up to 2261 conditions per place. [2024-06-04 16:01:22,096 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 147 selfloop transitions, 61 changer transitions 0/215 dead transitions. [2024-06-04 16:01:22,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 215 transitions, 2845 flow [2024-06-04 16:01:22,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:22,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-04 16:01:22,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-04 16:01:22,097 INFO L175 Difference]: Start difference. First operand has 150 places, 181 transitions, 2014 flow. Second operand 6 states and 152 transitions. [2024-06-04 16:01:22,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 215 transitions, 2845 flow [2024-06-04 16:01:22,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 215 transitions, 2727 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-04 16:01:22,194 INFO L231 Difference]: Finished difference. Result has 149 places, 193 transitions, 2225 flow [2024-06-04 16:01:22,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1896, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2225, PETRI_PLACES=149, PETRI_TRANSITIONS=193} [2024-06-04 16:01:22,195 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-04 16:01:22,195 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 193 transitions, 2225 flow [2024-06-04 16:01:22,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:22,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:22,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:22,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 16:01:22,195 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)] === [2024-06-04 16:01:22,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:22,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1705227346, now seen corresponding path program 2 times [2024-06-04 16:01:22,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:22,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410513940] [2024-06-04 16:01:22,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:22,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:22,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:22,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410513940] [2024-06-04 16:01:22,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410513940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:22,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:22,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:22,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179120514] [2024-06-04 16:01:22,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:22,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:22,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:22,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:22,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:22,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:22,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 193 transitions, 2225 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:22,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:22,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:22,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:22,838 INFO L124 PetriNetUnfolderBase]: 1563/2677 cut-off events. [2024-06-04 16:01:22,838 INFO L125 PetriNetUnfolderBase]: For 76131/76134 co-relation queries the response was YES. [2024-06-04 16:01:22,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16231 conditions, 2677 events. 1563/2677 cut-off events. For 76131/76134 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 15830 event pairs, 368 based on Foata normal form. 1/2670 useless extension candidates. Maximal degree in co-relation 16158. Up to 2268 conditions per place. [2024-06-04 16:01:22,861 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 144 selfloop transitions, 64 changer transitions 0/215 dead transitions. [2024-06-04 16:01:22,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 215 transitions, 2930 flow [2024-06-04 16:01:22,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:22,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:22,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-04 16:01:22,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 16:01:22,863 INFO L175 Difference]: Start difference. First operand has 149 places, 193 transitions, 2225 flow. Second operand 6 states and 150 transitions. [2024-06-04 16:01:22,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 215 transitions, 2930 flow [2024-06-04 16:01:22,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 215 transitions, 2849 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-04 16:01:22,962 INFO L231 Difference]: Finished difference. Result has 154 places, 196 transitions, 2317 flow [2024-06-04 16:01:22,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2147, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2317, PETRI_PLACES=154, PETRI_TRANSITIONS=196} [2024-06-04 16:01:22,963 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-04 16:01:22,963 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 196 transitions, 2317 flow [2024-06-04 16:01:22,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:22,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:22,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:22,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 16:01:22,964 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:22,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:22,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1293295816, now seen corresponding path program 2 times [2024-06-04 16:01:22,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:22,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835526931] [2024-06-04 16:01:22,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:22,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:23,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:23,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835526931] [2024-06-04 16:01:23,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835526931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:23,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:23,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:23,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100543656] [2024-06-04 16:01:23,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:23,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:23,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:23,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:23,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:23,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:23,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 196 transitions, 2317 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:23,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:23,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:23,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:23,718 INFO L124 PetriNetUnfolderBase]: 1604/2752 cut-off events. [2024-06-04 16:01:23,719 INFO L125 PetriNetUnfolderBase]: For 86874/86874 co-relation queries the response was YES. [2024-06-04 16:01:23,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16766 conditions, 2752 events. 1604/2752 cut-off events. For 86874/86874 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16422 event pairs, 353 based on Foata normal form. 12/2758 useless extension candidates. Maximal degree in co-relation 16691. Up to 2144 conditions per place. [2024-06-04 16:01:23,742 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 192 selfloop transitions, 43 changer transitions 0/242 dead transitions. [2024-06-04 16:01:23,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 242 transitions, 2961 flow [2024-06-04 16:01:23,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:01:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:01:23,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-04 16:01:23,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:01:23,744 INFO L175 Difference]: Start difference. First operand has 154 places, 196 transitions, 2317 flow. Second operand 10 states and 240 transitions. [2024-06-04 16:01:23,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 242 transitions, 2961 flow [2024-06-04 16:01:23,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 242 transitions, 2832 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:23,875 INFO L231 Difference]: Finished difference. Result has 162 places, 197 transitions, 2314 flow [2024-06-04 16:01:23,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2188, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2314, PETRI_PLACES=162, PETRI_TRANSITIONS=197} [2024-06-04 16:01:23,875 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-04 16:01:23,876 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 197 transitions, 2314 flow [2024-06-04 16:01:23,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:23,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:23,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:23,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 16:01:23,876 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)] === [2024-06-04 16:01:23,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:23,877 INFO L85 PathProgramCache]: Analyzing trace with hash -18362134, now seen corresponding path program 3 times [2024-06-04 16:01:23,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:23,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640050444] [2024-06-04 16:01:23,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:23,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:24,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:24,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640050444] [2024-06-04 16:01:24,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640050444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:24,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:24,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:24,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382479305] [2024-06-04 16:01:24,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:24,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:24,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:24,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:24,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:24,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:24,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 197 transitions, 2314 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:24,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:24,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:24,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:24,802 INFO L124 PetriNetUnfolderBase]: 1584/2732 cut-off events. [2024-06-04 16:01:24,802 INFO L125 PetriNetUnfolderBase]: For 85256/85256 co-relation queries the response was YES. [2024-06-04 16:01:24,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16321 conditions, 2732 events. 1584/2732 cut-off events. For 85256/85256 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 16415 event pairs, 298 based on Foata normal form. 12/2738 useless extension candidates. Maximal degree in co-relation 16245. Up to 1455 conditions per place. [2024-06-04 16:01:24,833 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 181 selfloop transitions, 50 changer transitions 0/238 dead transitions. [2024-06-04 16:01:24,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 238 transitions, 2854 flow [2024-06-04 16:01:24,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:01:24,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:01:24,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-04 16:01:24,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-04 16:01:24,839 INFO L175 Difference]: Start difference. First operand has 162 places, 197 transitions, 2314 flow. Second operand 9 states and 217 transitions. [2024-06-04 16:01:24,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 238 transitions, 2854 flow [2024-06-04 16:01:24,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 238 transitions, 2730 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-04 16:01:24,950 INFO L231 Difference]: Finished difference. Result has 162 places, 196 transitions, 2242 flow [2024-06-04 16:01:24,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2138, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2242, PETRI_PLACES=162, PETRI_TRANSITIONS=196} [2024-06-04 16:01:24,952 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-04 16:01:24,952 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 196 transitions, 2242 flow [2024-06-04 16:01:24,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:24,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:24,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:24,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 16:01:24,953 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:24,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:24,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1414684752, now seen corresponding path program 3 times [2024-06-04 16:01:24,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:24,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084670462] [2024-06-04 16:01:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:24,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:25,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:25,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084670462] [2024-06-04 16:01:25,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084670462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:25,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:25,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:25,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176944625] [2024-06-04 16:01:25,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:25,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:25,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:25,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:25,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:25,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:25,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 196 transitions, 2242 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:25,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:25,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:25,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:25,735 INFO L124 PetriNetUnfolderBase]: 1578/2714 cut-off events. [2024-06-04 16:01:25,736 INFO L125 PetriNetUnfolderBase]: For 74396/74396 co-relation queries the response was YES. [2024-06-04 16:01:25,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15866 conditions, 2714 events. 1578/2714 cut-off events. For 74396/74396 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 16224 event pairs, 357 based on Foata normal form. 2/2710 useless extension candidates. Maximal degree in co-relation 15789. Up to 2302 conditions per place. [2024-06-04 16:01:25,758 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 147 selfloop transitions, 60 changer transitions 0/214 dead transitions. [2024-06-04 16:01:25,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 214 transitions, 2840 flow [2024-06-04 16:01:25,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:25,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:25,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 16:01:25,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:01:25,760 INFO L175 Difference]: Start difference. First operand has 162 places, 196 transitions, 2242 flow. Second operand 6 states and 147 transitions. [2024-06-04 16:01:25,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 214 transitions, 2840 flow [2024-06-04 16:01:25,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 214 transitions, 2667 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-04 16:01:25,887 INFO L231 Difference]: Finished difference. Result has 160 places, 196 transitions, 2196 flow [2024-06-04 16:01:25,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2196, PETRI_PLACES=160, PETRI_TRANSITIONS=196} [2024-06-04 16:01:25,888 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-04 16:01:25,888 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 196 transitions, 2196 flow [2024-06-04 16:01:25,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:25,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:25,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:25,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 16:01:25,889 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:25,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:25,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1710710470, now seen corresponding path program 4 times [2024-06-04 16:01:25,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:25,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822881694] [2024-06-04 16:01:25,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:25,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:26,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:26,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:26,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822881694] [2024-06-04 16:01:26,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822881694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:26,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:26,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:26,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378514384] [2024-06-04 16:01:26,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:26,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:26,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:26,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:26,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:26,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:26,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 196 transitions, 2196 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:26,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:26,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:26,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:26,510 INFO L124 PetriNetUnfolderBase]: 1562/2693 cut-off events. [2024-06-04 16:01:26,511 INFO L125 PetriNetUnfolderBase]: For 74212/74212 co-relation queries the response was YES. [2024-06-04 16:01:26,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15224 conditions, 2693 events. 1562/2693 cut-off events. For 74212/74212 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16039 event pairs, 349 based on Foata normal form. 4/2694 useless extension candidates. Maximal degree in co-relation 15147. Up to 2383 conditions per place. [2024-06-04 16:01:26,533 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 167 selfloop transitions, 37 changer transitions 0/211 dead transitions. [2024-06-04 16:01:26,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 211 transitions, 2647 flow [2024-06-04 16:01:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:26,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:26,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-04 16:01:26,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:01:26,534 INFO L175 Difference]: Start difference. First operand has 160 places, 196 transitions, 2196 flow. Second operand 7 states and 161 transitions. [2024-06-04 16:01:26,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 211 transitions, 2647 flow [2024-06-04 16:01:26,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 211 transitions, 2555 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:26,702 INFO L231 Difference]: Finished difference. Result has 165 places, 196 transitions, 2193 flow [2024-06-04 16:01:26,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2105, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2193, PETRI_PLACES=165, PETRI_TRANSITIONS=196} [2024-06-04 16:01:26,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-04 16:01:26,702 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 196 transitions, 2193 flow [2024-06-04 16:01:26,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:26,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:26,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:26,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 16:01:26,703 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:26,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:26,703 INFO L85 PathProgramCache]: Analyzing trace with hash 562142638, now seen corresponding path program 5 times [2024-06-04 16:01:26,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:26,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988145901] [2024-06-04 16:01:26,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:26,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:26,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:26,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988145901] [2024-06-04 16:01:26,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988145901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:26,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:26,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:26,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097410333] [2024-06-04 16:01:26,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:26,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:26,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:26,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:26,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:26,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:26,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 196 transitions, 2193 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:26,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:26,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:26,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:27,302 INFO L124 PetriNetUnfolderBase]: 1564/2697 cut-off events. [2024-06-04 16:01:27,302 INFO L125 PetriNetUnfolderBase]: For 75918/75921 co-relation queries the response was YES. [2024-06-04 16:01:27,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15228 conditions, 2697 events. 1564/2697 cut-off events. For 75918/75921 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16097 event pairs, 357 based on Foata normal form. 4/2697 useless extension candidates. Maximal degree in co-relation 15150. Up to 2275 conditions per place. [2024-06-04 16:01:27,324 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 140 selfloop transitions, 75 changer transitions 0/222 dead transitions. [2024-06-04 16:01:27,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 222 transitions, 2807 flow [2024-06-04 16:01:27,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:27,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:27,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-04 16:01:27,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-04 16:01:27,326 INFO L175 Difference]: Start difference. First operand has 165 places, 196 transitions, 2193 flow. Second operand 6 states and 156 transitions. [2024-06-04 16:01:27,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 222 transitions, 2807 flow [2024-06-04 16:01:27,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 222 transitions, 2721 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 16:01:27,468 INFO L231 Difference]: Finished difference. Result has 165 places, 199 transitions, 2323 flow [2024-06-04 16:01:27,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2323, PETRI_PLACES=165, PETRI_TRANSITIONS=199} [2024-06-04 16:01:27,469 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-04 16:01:27,469 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 199 transitions, 2323 flow [2024-06-04 16:01:27,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:27,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:27,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:27,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 16:01:27,470 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:27,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:27,470 INFO L85 PathProgramCache]: Analyzing trace with hash 562322128, now seen corresponding path program 6 times [2024-06-04 16:01:27,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:27,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105628511] [2024-06-04 16:01:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:27,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:27,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:27,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105628511] [2024-06-04 16:01:27,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105628511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:27,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:27,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:27,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694275907] [2024-06-04 16:01:27,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:27,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:27,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:27,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:27,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:27,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:27,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 199 transitions, 2323 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:27,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:27,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:27,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:28,092 INFO L124 PetriNetUnfolderBase]: 1548/2674 cut-off events. [2024-06-04 16:01:28,092 INFO L125 PetriNetUnfolderBase]: For 77844/77844 co-relation queries the response was YES. [2024-06-04 16:01:28,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15149 conditions, 2674 events. 1548/2674 cut-off events. For 77844/77844 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 15946 event pairs, 349 based on Foata normal form. 4/2675 useless extension candidates. Maximal degree in co-relation 15070. Up to 2259 conditions per place. [2024-06-04 16:01:28,115 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 143 selfloop transitions, 75 changer transitions 0/225 dead transitions. [2024-06-04 16:01:28,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 225 transitions, 2825 flow [2024-06-04 16:01:28,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:28,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:28,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-04 16:01:28,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-04 16:01:28,116 INFO L175 Difference]: Start difference. First operand has 165 places, 199 transitions, 2323 flow. Second operand 7 states and 177 transitions. [2024-06-04 16:01:28,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 225 transitions, 2825 flow [2024-06-04 16:01:28,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 225 transitions, 2671 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:28,256 INFO L231 Difference]: Finished difference. Result has 169 places, 199 transitions, 2351 flow [2024-06-04 16:01:28,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2169, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2351, PETRI_PLACES=169, PETRI_TRANSITIONS=199} [2024-06-04 16:01:28,256 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-04 16:01:28,256 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 199 transitions, 2351 flow [2024-06-04 16:01:28,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:28,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:28,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:28,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 16:01:28,257 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:28,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:28,257 INFO L85 PathProgramCache]: Analyzing trace with hash 414582441, now seen corresponding path program 1 times [2024-06-04 16:01:28,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:28,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902187854] [2024-06-04 16:01:28,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:28,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:28,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:28,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902187854] [2024-06-04 16:01:28,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902187854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:28,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:28,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:28,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207832997] [2024-06-04 16:01:28,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:28,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:28,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:28,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:28,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:28,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:28,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 199 transitions, 2351 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) [2024-06-04 16:01:28,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:28,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:28,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:28,860 INFO L124 PetriNetUnfolderBase]: 1566/2680 cut-off events. [2024-06-04 16:01:28,860 INFO L125 PetriNetUnfolderBase]: For 80747/80747 co-relation queries the response was YES. [2024-06-04 16:01:28,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15457 conditions, 2680 events. 1566/2680 cut-off events. For 80747/80747 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 15898 event pairs, 358 based on Foata normal form. 2/2676 useless extension candidates. Maximal degree in co-relation 15377. Up to 2187 conditions per place. [2024-06-04 16:01:28,883 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 133 selfloop transitions, 95 changer transitions 0/235 dead transitions. [2024-06-04 16:01:28,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 235 transitions, 3197 flow [2024-06-04 16:01:28,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:28,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:28,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-04 16:01:28,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-04 16:01:28,884 INFO L175 Difference]: Start difference. First operand has 169 places, 199 transitions, 2351 flow. Second operand 7 states and 169 transitions. [2024-06-04 16:01:28,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 235 transitions, 3197 flow [2024-06-04 16:01:29,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 235 transitions, 2961 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-04 16:01:29,024 INFO L231 Difference]: Finished difference. Result has 169 places, 216 transitions, 2606 flow [2024-06-04 16:01:29,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2123, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2606, PETRI_PLACES=169, PETRI_TRANSITIONS=216} [2024-06-04 16:01:29,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-04 16:01:29,025 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 216 transitions, 2606 flow [2024-06-04 16:01:29,025 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) [2024-06-04 16:01:29,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:29,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:29,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 16:01:29,025 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:29,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:29,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1710719553, now seen corresponding path program 2 times [2024-06-04 16:01:29,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:29,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816666608] [2024-06-04 16:01:29,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:29,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:29,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:29,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816666608] [2024-06-04 16:01:29,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816666608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:29,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:29,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:29,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157638475] [2024-06-04 16:01:29,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:29,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:29,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:29,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:29,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:29,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:29,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 216 transitions, 2606 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) [2024-06-04 16:01:29,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:29,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:29,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:29,709 INFO L124 PetriNetUnfolderBase]: 1600/2745 cut-off events. [2024-06-04 16:01:29,710 INFO L125 PetriNetUnfolderBase]: For 80781/80781 co-relation queries the response was YES. [2024-06-04 16:01:29,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16326 conditions, 2745 events. 1600/2745 cut-off events. For 80781/80781 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 16365 event pairs, 348 based on Foata normal form. 2/2744 useless extension candidates. Maximal degree in co-relation 16245. Up to 2415 conditions per place. [2024-06-04 16:01:29,734 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 191 selfloop transitions, 47 changer transitions 0/245 dead transitions. [2024-06-04 16:01:29,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 245 transitions, 3449 flow [2024-06-04 16:01:29,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:29,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-04 16:01:29,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-04 16:01:29,738 INFO L175 Difference]: Start difference. First operand has 169 places, 216 transitions, 2606 flow. Second operand 8 states and 182 transitions. [2024-06-04 16:01:29,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 245 transitions, 3449 flow [2024-06-04 16:01:29,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 245 transitions, 3376 flow, removed 34 selfloop flow, removed 1 redundant places. [2024-06-04 16:01:29,898 INFO L231 Difference]: Finished difference. Result has 177 places, 227 transitions, 2833 flow [2024-06-04 16:01:29,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2539, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2833, PETRI_PLACES=177, PETRI_TRANSITIONS=227} [2024-06-04 16:01:29,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-04 16:01:29,899 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 227 transitions, 2833 flow [2024-06-04 16:01:29,899 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) [2024-06-04 16:01:29,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:29,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:29,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 16:01:29,900 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)] === [2024-06-04 16:01:29,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:29,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1760160051, now seen corresponding path program 3 times [2024-06-04 16:01:29,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:29,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188348241] [2024-06-04 16:01:29,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:29,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:30,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:30,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:30,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188348241] [2024-06-04 16:01:30,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188348241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:30,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:30,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:30,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799841873] [2024-06-04 16:01:30,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:30,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:30,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:30,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:30,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:30,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:30,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 227 transitions, 2833 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) [2024-06-04 16:01:30,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:30,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:30,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:30,566 INFO L124 PetriNetUnfolderBase]: 1626/2788 cut-off events. [2024-06-04 16:01:30,566 INFO L125 PetriNetUnfolderBase]: For 85006/85006 co-relation queries the response was YES. [2024-06-04 16:01:30,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16623 conditions, 2788 events. 1626/2788 cut-off events. For 85006/85006 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 16690 event pairs, 348 based on Foata normal form. 2/2787 useless extension candidates. Maximal degree in co-relation 16538. Up to 2318 conditions per place. [2024-06-04 16:01:30,593 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 161 selfloop transitions, 99 changer transitions 0/267 dead transitions. [2024-06-04 16:01:30,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 267 transitions, 3756 flow [2024-06-04 16:01:30,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:30,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-04 16:01:30,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2024-06-04 16:01:30,595 INFO L175 Difference]: Start difference. First operand has 177 places, 227 transitions, 2833 flow. Second operand 8 states and 197 transitions. [2024-06-04 16:01:30,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 267 transitions, 3756 flow [2024-06-04 16:01:30,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 267 transitions, 3675 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:30,765 INFO L231 Difference]: Finished difference. Result has 184 places, 238 transitions, 3217 flow [2024-06-04 16:01:30,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2752, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3217, PETRI_PLACES=184, PETRI_TRANSITIONS=238} [2024-06-04 16:01:30,765 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-04 16:01:30,765 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 238 transitions, 3217 flow [2024-06-04 16:01:30,766 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) [2024-06-04 16:01:30,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:30,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:30,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 16:01:30,766 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)] === [2024-06-04 16:01:30,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:30,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1327080689, now seen corresponding path program 1 times [2024-06-04 16:01:30,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:30,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148405144] [2024-06-04 16:01:30,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:30,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:31,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:31,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:31,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148405144] [2024-06-04 16:01:31,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148405144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:31,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:31,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:31,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299771024] [2024-06-04 16:01:31,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:31,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:31,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:31,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:31,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:31,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:31,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 238 transitions, 3217 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) [2024-06-04 16:01:31,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:31,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:31,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:31,535 INFO L124 PetriNetUnfolderBase]: 1631/2793 cut-off events. [2024-06-04 16:01:31,535 INFO L125 PetriNetUnfolderBase]: For 90419/90422 co-relation queries the response was YES. [2024-06-04 16:01:31,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17200 conditions, 2793 events. 1631/2793 cut-off events. For 90419/90422 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16759 event pairs, 369 based on Foata normal form. 1/2786 useless extension candidates. Maximal degree in co-relation 17111. Up to 2383 conditions per place. [2024-06-04 16:01:31,558 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 189 selfloop transitions, 67 changer transitions 0/263 dead transitions. [2024-06-04 16:01:31,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 263 transitions, 3986 flow [2024-06-04 16:01:31,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:31,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:31,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-04 16:01:31,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:01:31,559 INFO L175 Difference]: Start difference. First operand has 184 places, 238 transitions, 3217 flow. Second operand 7 states and 168 transitions. [2024-06-04 16:01:31,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 263 transitions, 3986 flow [2024-06-04 16:01:31,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 263 transitions, 3903 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:31,778 INFO L231 Difference]: Finished difference. Result has 189 places, 241 transitions, 3321 flow [2024-06-04 16:01:31,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3138, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3321, PETRI_PLACES=189, PETRI_TRANSITIONS=241} [2024-06-04 16:01:31,779 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-04 16:01:31,779 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 241 transitions, 3321 flow [2024-06-04 16:01:31,779 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) [2024-06-04 16:01:31,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:31,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:31,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 16:01:31,779 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:31,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:31,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1327080503, now seen corresponding path program 1 times [2024-06-04 16:01:31,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:31,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116722862] [2024-06-04 16:01:31,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:31,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:31,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:31,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116722862] [2024-06-04 16:01:31,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116722862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:31,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:31,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:31,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602632360] [2024-06-04 16:01:31,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:31,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:31,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:32,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:32,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:32,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:32,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 241 transitions, 3321 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) [2024-06-04 16:01:32,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:32,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:32,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:32,420 INFO L124 PetriNetUnfolderBase]: 1652/2824 cut-off events. [2024-06-04 16:01:32,421 INFO L125 PetriNetUnfolderBase]: For 93021/93024 co-relation queries the response was YES. [2024-06-04 16:01:32,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17706 conditions, 2824 events. 1652/2824 cut-off events. For 93021/93024 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 16936 event pairs, 383 based on Foata normal form. 1/2815 useless extension candidates. Maximal degree in co-relation 17615. Up to 2269 conditions per place. [2024-06-04 16:01:32,450 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 138 selfloop transitions, 128 changer transitions 0/273 dead transitions. [2024-06-04 16:01:32,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 273 transitions, 4329 flow [2024-06-04 16:01:32,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:32,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:32,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-04 16:01:32,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-04 16:01:32,451 INFO L175 Difference]: Start difference. First operand has 189 places, 241 transitions, 3321 flow. Second operand 7 states and 172 transitions. [2024-06-04 16:01:32,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 273 transitions, 4329 flow [2024-06-04 16:01:32,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 273 transitions, 4177 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:32,685 INFO L231 Difference]: Finished difference. Result has 191 places, 250 transitions, 3611 flow [2024-06-04 16:01:32,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3169, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3611, PETRI_PLACES=191, PETRI_TRANSITIONS=250} [2024-06-04 16:01:32,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-04 16:01:32,686 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 250 transitions, 3611 flow [2024-06-04 16:01:32,686 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) [2024-06-04 16:01:32,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:32,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:32,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 16:01:32,686 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:32,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:32,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1149711833, now seen corresponding path program 2 times [2024-06-04 16:01:32,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:32,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098912981] [2024-06-04 16:01:32,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:32,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:32,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:32,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098912981] [2024-06-04 16:01:32,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098912981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:32,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:32,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:32,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329577964] [2024-06-04 16:01:32,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:32,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:32,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:32,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:32,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:32,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:32,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 250 transitions, 3611 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) [2024-06-04 16:01:32,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:32,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:32,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:33,359 INFO L124 PetriNetUnfolderBase]: 1665/2845 cut-off events. [2024-06-04 16:01:33,359 INFO L125 PetriNetUnfolderBase]: For 98889/98892 co-relation queries the response was YES. [2024-06-04 16:01:33,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18189 conditions, 2845 events. 1665/2845 cut-off events. For 98889/98892 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17083 event pairs, 384 based on Foata normal form. 1/2837 useless extension candidates. Maximal degree in co-relation 18097. Up to 2282 conditions per place. [2024-06-04 16:01:33,388 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 135 selfloop transitions, 134 changer transitions 0/276 dead transitions. [2024-06-04 16:01:33,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 276 transitions, 4561 flow [2024-06-04 16:01:33,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:33,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:33,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 16:01:33,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-04 16:01:33,390 INFO L175 Difference]: Start difference. First operand has 191 places, 250 transitions, 3611 flow. Second operand 7 states and 171 transitions. [2024-06-04 16:01:33,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 276 transitions, 4561 flow [2024-06-04 16:01:33,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 276 transitions, 4343 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:33,625 INFO L231 Difference]: Finished difference. Result has 195 places, 256 transitions, 3785 flow [2024-06-04 16:01:33,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3399, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3785, PETRI_PLACES=195, PETRI_TRANSITIONS=256} [2024-06-04 16:01:33,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-04 16:01:33,626 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 256 transitions, 3785 flow [2024-06-04 16:01:33,626 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) [2024-06-04 16:01:33,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:33,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:33,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 16:01:33,627 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:33,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:33,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1149948983, now seen corresponding path program 3 times [2024-06-04 16:01:33,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:33,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198851146] [2024-06-04 16:01:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:33,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:33,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:33,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198851146] [2024-06-04 16:01:33,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198851146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:33,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:33,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:33,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113061175] [2024-06-04 16:01:33,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:33,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:33,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:33,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:33,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:33,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:33,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 256 transitions, 3785 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) [2024-06-04 16:01:33,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:33,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:33,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:34,307 INFO L124 PetriNetUnfolderBase]: 1662/2840 cut-off events. [2024-06-04 16:01:34,307 INFO L125 PetriNetUnfolderBase]: For 102844/102847 co-relation queries the response was YES. [2024-06-04 16:01:34,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18226 conditions, 2840 events. 1662/2840 cut-off events. For 102844/102847 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17016 event pairs, 383 based on Foata normal form. 1/2831 useless extension candidates. Maximal degree in co-relation 18133. Up to 2280 conditions per place. [2024-06-04 16:01:34,334 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 137 selfloop transitions, 132 changer transitions 0/276 dead transitions. [2024-06-04 16:01:34,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 276 transitions, 4623 flow [2024-06-04 16:01:34,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:34,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:34,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 16:01:34,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-04 16:01:34,335 INFO L175 Difference]: Start difference. First operand has 195 places, 256 transitions, 3785 flow. Second operand 7 states and 171 transitions. [2024-06-04 16:01:34,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 276 transitions, 4623 flow [2024-06-04 16:01:34,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 276 transitions, 4324 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:34,569 INFO L231 Difference]: Finished difference. Result has 198 places, 256 transitions, 3756 flow [2024-06-04 16:01:34,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3486, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3756, PETRI_PLACES=198, PETRI_TRANSITIONS=256} [2024-06-04 16:01:34,570 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-04 16:01:34,570 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 256 transitions, 3756 flow [2024-06-04 16:01:34,570 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) [2024-06-04 16:01:34,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:34,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:34,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 16:01:34,571 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:34,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:34,571 INFO L85 PathProgramCache]: Analyzing trace with hash 2031313379, now seen corresponding path program 2 times [2024-06-04 16:01:34,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:34,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529606004] [2024-06-04 16:01:34,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:34,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:34,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:34,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529606004] [2024-06-04 16:01:34,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529606004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:34,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:34,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:34,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293389286] [2024-06-04 16:01:34,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:34,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:34,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:34,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:34,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:34,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:34,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 256 transitions, 3756 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) [2024-06-04 16:01:34,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:34,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:34,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:35,259 INFO L124 PetriNetUnfolderBase]: 1667/2852 cut-off events. [2024-06-04 16:01:35,260 INFO L125 PetriNetUnfolderBase]: For 107436/107439 co-relation queries the response was YES. [2024-06-04 16:01:35,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18269 conditions, 2852 events. 1667/2852 cut-off events. For 107436/107439 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 17109 event pairs, 367 based on Foata normal form. 1/2846 useless extension candidates. Maximal degree in co-relation 18176. Up to 2432 conditions per place. [2024-06-04 16:01:35,287 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 202 selfloop transitions, 70 changer transitions 0/279 dead transitions. [2024-06-04 16:01:35,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 279 transitions, 4567 flow [2024-06-04 16:01:35,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:35,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:35,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-04 16:01:35,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:01:35,288 INFO L175 Difference]: Start difference. First operand has 198 places, 256 transitions, 3756 flow. Second operand 8 states and 184 transitions. [2024-06-04 16:01:35,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 279 transitions, 4567 flow [2024-06-04 16:01:35,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 279 transitions, 4303 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:35,535 INFO L231 Difference]: Finished difference. Result has 202 places, 259 transitions, 3685 flow [2024-06-04 16:01:35,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3685, PETRI_PLACES=202, PETRI_TRANSITIONS=259} [2024-06-04 16:01:35,536 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-04 16:01:35,536 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 259 transitions, 3685 flow [2024-06-04 16:01:35,536 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) [2024-06-04 16:01:35,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:35,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:35,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 16:01:35,537 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:35,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:35,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1149702905, now seen corresponding path program 1 times [2024-06-04 16:01:35,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:35,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449130675] [2024-06-04 16:01:35,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:35,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:35,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:35,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:35,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:35,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449130675] [2024-06-04 16:01:35,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449130675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:35,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:35,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:35,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145322946] [2024-06-04 16:01:35,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:35,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:35,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:35,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:35,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:35,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:01:35,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 259 transitions, 3685 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) [2024-06-04 16:01:35,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:35,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:01:35,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:36,234 INFO L124 PetriNetUnfolderBase]: 1619/2803 cut-off events. [2024-06-04 16:01:36,234 INFO L125 PetriNetUnfolderBase]: For 118250/118250 co-relation queries the response was YES. [2024-06-04 16:01:36,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17927 conditions, 2803 events. 1619/2803 cut-off events. For 118250/118250 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17014 event pairs, 339 based on Foata normal form. 10/2786 useless extension candidates. Maximal degree in co-relation 17833. Up to 2275 conditions per place. [2024-06-04 16:01:36,309 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 192 selfloop transitions, 37 changer transitions 0/281 dead transitions. [2024-06-04 16:01:36,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 281 transitions, 4227 flow [2024-06-04 16:01:36,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:36,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:36,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 16:01:36,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-04 16:01:36,310 INFO L175 Difference]: Start difference. First operand has 202 places, 259 transitions, 3685 flow. Second operand 7 states and 167 transitions. [2024-06-04 16:01:36,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 281 transitions, 4227 flow [2024-06-04 16:01:36,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 281 transitions, 4103 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:36,571 INFO L231 Difference]: Finished difference. Result has 205 places, 260 transitions, 3657 flow [2024-06-04 16:01:36,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3561, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3657, PETRI_PLACES=205, PETRI_TRANSITIONS=260} [2024-06-04 16:01:36,572 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-04 16:01:36,572 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 260 transitions, 3657 flow [2024-06-04 16:01:36,572 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) [2024-06-04 16:01:36,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:36,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:36,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 16:01:36,573 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:36,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:36,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1169016253, now seen corresponding path program 3 times [2024-06-04 16:01:36,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:36,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504190842] [2024-06-04 16:01:36,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:36,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:36,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:36,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504190842] [2024-06-04 16:01:36,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504190842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:36,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:36,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:36,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100789337] [2024-06-04 16:01:36,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:36,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:36,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:36,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:36,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:36,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:36,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 260 transitions, 3657 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) [2024-06-04 16:01:36,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:36,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:36,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:37,230 INFO L124 PetriNetUnfolderBase]: 1700/2908 cut-off events. [2024-06-04 16:01:37,230 INFO L125 PetriNetUnfolderBase]: For 114178/114178 co-relation queries the response was YES. [2024-06-04 16:01:37,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18451 conditions, 2908 events. 1700/2908 cut-off events. For 114178/114178 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17543 event pairs, 364 based on Foata normal form. 1/2903 useless extension candidates. Maximal degree in co-relation 18355. Up to 2485 conditions per place. [2024-06-04 16:01:37,259 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 205 selfloop transitions, 66 changer transitions 0/278 dead transitions. [2024-06-04 16:01:37,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 278 transitions, 4333 flow [2024-06-04 16:01:37,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:37,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 16:01:37,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-04 16:01:37,260 INFO L175 Difference]: Start difference. First operand has 205 places, 260 transitions, 3657 flow. Second operand 7 states and 164 transitions. [2024-06-04 16:01:37,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 278 transitions, 4333 flow [2024-06-04 16:01:37,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 278 transitions, 4247 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:37,510 INFO L231 Difference]: Finished difference. Result has 207 places, 260 transitions, 3709 flow [2024-06-04 16:01:37,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3571, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3709, PETRI_PLACES=207, PETRI_TRANSITIONS=260} [2024-06-04 16:01:37,510 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-04 16:01:37,510 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 260 transitions, 3709 flow [2024-06-04 16:01:37,510 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) [2024-06-04 16:01:37,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:37,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:37,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 16:01:37,511 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:37,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:37,511 INFO L85 PathProgramCache]: Analyzing trace with hash -301620279, now seen corresponding path program 4 times [2024-06-04 16:01:37,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:37,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119693133] [2024-06-04 16:01:37,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:37,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:37,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:37,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:37,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119693133] [2024-06-04 16:01:37,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119693133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:37,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:37,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:37,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479923390] [2024-06-04 16:01:37,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:37,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:37,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:37,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:37,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:37,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:37,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 260 transitions, 3709 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) [2024-06-04 16:01:37,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:37,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:37,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:38,173 INFO L124 PetriNetUnfolderBase]: 1694/2896 cut-off events. [2024-06-04 16:01:38,173 INFO L125 PetriNetUnfolderBase]: For 117985/117985 co-relation queries the response was YES. [2024-06-04 16:01:38,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18464 conditions, 2896 events. 1694/2896 cut-off events. For 117985/117985 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 17514 event pairs, 363 based on Foata normal form. 2/2892 useless extension candidates. Maximal degree in co-relation 18367. Up to 2333 conditions per place. [2024-06-04 16:01:38,201 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 145 selfloop transitions, 127 changer transitions 0/279 dead transitions. [2024-06-04 16:01:38,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 279 transitions, 4483 flow [2024-06-04 16:01:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:38,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-04 16:01:38,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-04 16:01:38,202 INFO L175 Difference]: Start difference. First operand has 207 places, 260 transitions, 3709 flow. Second operand 7 states and 169 transitions. [2024-06-04 16:01:38,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 279 transitions, 4483 flow [2024-06-04 16:01:38,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 279 transitions, 4309 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-04 16:01:38,532 INFO L231 Difference]: Finished difference. Result has 208 places, 260 transitions, 3796 flow [2024-06-04 16:01:38,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3535, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3796, PETRI_PLACES=208, PETRI_TRANSITIONS=260} [2024-06-04 16:01:38,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-04 16:01:38,533 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 260 transitions, 3796 flow [2024-06-04 16:01:38,533 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) [2024-06-04 16:01:38,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:38,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:38,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 16:01:38,534 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)] === [2024-06-04 16:01:38,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:38,534 INFO L85 PathProgramCache]: Analyzing trace with hash -294232545, now seen corresponding path program 4 times [2024-06-04 16:01:38,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:38,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062319224] [2024-06-04 16:01:38,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:38,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:38,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:38,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062319224] [2024-06-04 16:01:38,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062319224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:38,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:38,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:38,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141696920] [2024-06-04 16:01:38,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:38,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:38,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:38,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:38,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:38,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:38,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 260 transitions, 3796 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) [2024-06-04 16:01:38,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:38,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:38,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:39,210 INFO L124 PetriNetUnfolderBase]: 1691/2894 cut-off events. [2024-06-04 16:01:39,210 INFO L125 PetriNetUnfolderBase]: For 120488/120488 co-relation queries the response was YES. [2024-06-04 16:01:39,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18635 conditions, 2894 events. 1691/2894 cut-off events. For 120488/120488 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17448 event pairs, 364 based on Foata normal form. 1/2889 useless extension candidates. Maximal degree in co-relation 18538. Up to 2474 conditions per place. [2024-06-04 16:01:39,239 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 200 selfloop transitions, 70 changer transitions 0/277 dead transitions. [2024-06-04 16:01:39,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 277 transitions, 4378 flow [2024-06-04 16:01:39,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:39,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:39,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 16:01:39,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-04 16:01:39,241 INFO L175 Difference]: Start difference. First operand has 208 places, 260 transitions, 3796 flow. Second operand 7 states and 163 transitions. [2024-06-04 16:01:39,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 277 transitions, 4378 flow [2024-06-04 16:01:39,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 277 transitions, 4015 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 16:01:39,569 INFO L231 Difference]: Finished difference. Result has 209 places, 260 transitions, 3579 flow [2024-06-04 16:01:39,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3433, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3579, PETRI_PLACES=209, PETRI_TRANSITIONS=260} [2024-06-04 16:01:39,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-04 16:01:39,570 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 260 transitions, 3579 flow [2024-06-04 16:01:39,570 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) [2024-06-04 16:01:39,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:39,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:39,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 16:01:39,570 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)] === [2024-06-04 16:01:39,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:39,571 INFO L85 PathProgramCache]: Analyzing trace with hash 82164681, now seen corresponding path program 5 times [2024-06-04 16:01:39,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:39,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433501077] [2024-06-04 16:01:39,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:39,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:39,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:39,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433501077] [2024-06-04 16:01:39,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433501077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:39,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:39,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:39,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646253302] [2024-06-04 16:01:39,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:39,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:39,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:39,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:39,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:39,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:39,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 260 transitions, 3579 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) [2024-06-04 16:01:39,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:39,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:39,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:40,247 INFO L124 PetriNetUnfolderBase]: 1693/2904 cut-off events. [2024-06-04 16:01:40,248 INFO L125 PetriNetUnfolderBase]: For 121894/121894 co-relation queries the response was YES. [2024-06-04 16:01:40,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18498 conditions, 2904 events. 1693/2904 cut-off events. For 121894/121894 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 17521 event pairs, 355 based on Foata normal form. 2/2903 useless extension candidates. Maximal degree in co-relation 18400. Up to 2552 conditions per place. [2024-06-04 16:01:40,276 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 224 selfloop transitions, 50 changer transitions 0/281 dead transitions. [2024-06-04 16:01:40,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 281 transitions, 4427 flow [2024-06-04 16:01:40,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:40,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:40,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-04 16:01:40,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-04 16:01:40,278 INFO L175 Difference]: Start difference. First operand has 209 places, 260 transitions, 3579 flow. Second operand 8 states and 182 transitions. [2024-06-04 16:01:40,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 281 transitions, 4427 flow [2024-06-04 16:01:40,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 281 transitions, 4273 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:40,543 INFO L231 Difference]: Finished difference. Result has 212 places, 263 transitions, 3592 flow [2024-06-04 16:01:40,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3427, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3592, PETRI_PLACES=212, PETRI_TRANSITIONS=263} [2024-06-04 16:01:40,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-04 16:01:40,543 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 263 transitions, 3592 flow [2024-06-04 16:01:40,544 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) [2024-06-04 16:01:40,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:40,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:40,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 16:01:40,544 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)] === [2024-06-04 16:01:40,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:40,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1269893539, now seen corresponding path program 6 times [2024-06-04 16:01:40,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:40,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489184734] [2024-06-04 16:01:40,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:40,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:40,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:40,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:40,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489184734] [2024-06-04 16:01:40,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489184734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:40,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:40,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:40,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726228276] [2024-06-04 16:01:40,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:40,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:40,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:40,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:40,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:40,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:40,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 263 transitions, 3592 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) [2024-06-04 16:01:40,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:40,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:40,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:41,310 INFO L124 PetriNetUnfolderBase]: 1695/2909 cut-off events. [2024-06-04 16:01:41,310 INFO L125 PetriNetUnfolderBase]: For 124840/124840 co-relation queries the response was YES. [2024-06-04 16:01:41,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18502 conditions, 2909 events. 1695/2909 cut-off events. For 124840/124840 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 17577 event pairs, 355 based on Foata normal form. 2/2908 useless extension candidates. Maximal degree in co-relation 18403. Up to 2418 conditions per place. [2024-06-04 16:01:41,333 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 184 selfloop transitions, 104 changer transitions 0/295 dead transitions. [2024-06-04 16:01:41,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 295 transitions, 4497 flow [2024-06-04 16:01:41,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:41,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:41,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-04 16:01:41,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-04 16:01:41,335 INFO L175 Difference]: Start difference. First operand has 212 places, 263 transitions, 3592 flow. Second operand 8 states and 198 transitions. [2024-06-04 16:01:41,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 295 transitions, 4497 flow [2024-06-04 16:01:41,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 295 transitions, 4365 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 16:01:41,713 INFO L231 Difference]: Finished difference. Result has 214 places, 266 transitions, 3741 flow [2024-06-04 16:01:41,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3741, PETRI_PLACES=214, PETRI_TRANSITIONS=266} [2024-06-04 16:01:41,714 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-04 16:01:41,714 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 266 transitions, 3741 flow [2024-06-04 16:01:41,714 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) [2024-06-04 16:01:41,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:41,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:41,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 16:01:41,714 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)] === [2024-06-04 16:01:41,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:41,715 INFO L85 PathProgramCache]: Analyzing trace with hash 246553895, now seen corresponding path program 7 times [2024-06-04 16:01:41,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:41,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277359881] [2024-06-04 16:01:41,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:41,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:41,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:41,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277359881] [2024-06-04 16:01:41,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277359881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:41,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:41,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:41,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369083950] [2024-06-04 16:01:41,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:41,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:41,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:41,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:41,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:41,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:41,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 266 transitions, 3741 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) [2024-06-04 16:01:41,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:41,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:41,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:42,387 INFO L124 PetriNetUnfolderBase]: 1700/2917 cut-off events. [2024-06-04 16:01:42,388 INFO L125 PetriNetUnfolderBase]: For 129304/129307 co-relation queries the response was YES. [2024-06-04 16:01:42,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18831 conditions, 2917 events. 1700/2917 cut-off events. For 129304/129307 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 17657 event pairs, 362 based on Foata normal form. 3/2916 useless extension candidates. Maximal degree in co-relation 18731. Up to 2422 conditions per place. [2024-06-04 16:01:42,418 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 181 selfloop transitions, 107 changer transitions 0/295 dead transitions. [2024-06-04 16:01:42,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 295 transitions, 4745 flow [2024-06-04 16:01:42,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:42,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:42,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 16:01:42,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-04 16:01:42,419 INFO L175 Difference]: Start difference. First operand has 214 places, 266 transitions, 3741 flow. Second operand 7 states and 176 transitions. [2024-06-04 16:01:42,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 295 transitions, 4745 flow [2024-06-04 16:01:42,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 295 transitions, 4583 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:42,792 INFO L231 Difference]: Finished difference. Result has 216 places, 269 transitions, 3869 flow [2024-06-04 16:01:42,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3869, PETRI_PLACES=216, PETRI_TRANSITIONS=269} [2024-06-04 16:01:42,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-04 16:01:42,793 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 269 transitions, 3869 flow [2024-06-04 16:01:42,793 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) [2024-06-04 16:01:42,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:42,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:42,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 16:01:42,793 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)] === [2024-06-04 16:01:42,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:42,794 INFO L85 PathProgramCache]: Analyzing trace with hash 246791045, now seen corresponding path program 8 times [2024-06-04 16:01:42,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:42,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535282621] [2024-06-04 16:01:42,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:42,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:43,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:43,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535282621] [2024-06-04 16:01:43,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535282621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:43,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:43,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:43,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101465503] [2024-06-04 16:01:43,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:43,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:43,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:43,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:43,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:43,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:43,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 269 transitions, 3869 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) [2024-06-04 16:01:43,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:43,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:43,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:43,538 INFO L124 PetriNetUnfolderBase]: 1697/2913 cut-off events. [2024-06-04 16:01:43,538 INFO L125 PetriNetUnfolderBase]: For 128703/128706 co-relation queries the response was YES. [2024-06-04 16:01:43,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18750 conditions, 2913 events. 1697/2913 cut-off events. For 128703/128706 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 17597 event pairs, 362 based on Foata normal form. 3/2912 useless extension candidates. Maximal degree in co-relation 18650. Up to 2420 conditions per place. [2024-06-04 16:01:43,569 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 177 selfloop transitions, 107 changer transitions 0/291 dead transitions. [2024-06-04 16:01:43,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 291 transitions, 4691 flow [2024-06-04 16:01:43,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:43,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:43,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-04 16:01:43,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-04 16:01:43,578 INFO L175 Difference]: Start difference. First operand has 216 places, 269 transitions, 3869 flow. Second operand 7 states and 172 transitions. [2024-06-04 16:01:43,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 291 transitions, 4691 flow [2024-06-04 16:01:43,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 291 transitions, 4296 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-04 16:01:43,951 INFO L231 Difference]: Finished difference. Result has 216 places, 269 transitions, 3694 flow [2024-06-04 16:01:43,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3694, PETRI_PLACES=216, PETRI_TRANSITIONS=269} [2024-06-04 16:01:43,951 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-04 16:01:43,952 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 269 transitions, 3694 flow [2024-06-04 16:01:43,952 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) [2024-06-04 16:01:43,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:43,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:43,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 16:01:43,952 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)] === [2024-06-04 16:01:43,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:43,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1000205959, now seen corresponding path program 2 times [2024-06-04 16:01:43,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:43,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444358305] [2024-06-04 16:01:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:43,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:44,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:44,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444358305] [2024-06-04 16:01:44,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444358305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:44,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:44,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:44,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872085283] [2024-06-04 16:01:44,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:44,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:44,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:44,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:44,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:44,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:01:44,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 269 transitions, 3694 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) [2024-06-04 16:01:44,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:44,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:01:44,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:44,692 INFO L124 PetriNetUnfolderBase]: 1650/2862 cut-off events. [2024-06-04 16:01:44,693 INFO L125 PetriNetUnfolderBase]: For 145981/145981 co-relation queries the response was YES. [2024-06-04 16:01:44,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18477 conditions, 2862 events. 1650/2862 cut-off events. For 145981/145981 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 17519 event pairs, 263 based on Foata normal form. 11/2844 useless extension candidates. Maximal degree in co-relation 18376. Up to 2311 conditions per place. [2024-06-04 16:01:44,722 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 211 selfloop transitions, 27 changer transitions 0/293 dead transitions. [2024-06-04 16:01:44,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 293 transitions, 4266 flow [2024-06-04 16:01:44,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:44,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-04 16:01:44,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-06-04 16:01:44,724 INFO L175 Difference]: Start difference. First operand has 216 places, 269 transitions, 3694 flow. Second operand 5 states and 134 transitions. [2024-06-04 16:01:44,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 293 transitions, 4266 flow [2024-06-04 16:01:45,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 293 transitions, 3992 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 16:01:45,044 INFO L231 Difference]: Finished difference. Result has 215 places, 271 transitions, 3511 flow [2024-06-04 16:01:45,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3420, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3511, PETRI_PLACES=215, PETRI_TRANSITIONS=271} [2024-06-04 16:01:45,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-04 16:01:45,045 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 271 transitions, 3511 flow [2024-06-04 16:01:45,045 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) [2024-06-04 16:01:45,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:45,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:45,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 16:01:45,046 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)] === [2024-06-04 16:01:45,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:45,046 INFO L85 PathProgramCache]: Analyzing trace with hash 690133763, now seen corresponding path program 3 times [2024-06-04 16:01:45,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:45,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077172574] [2024-06-04 16:01:45,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:45,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:45,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:45,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077172574] [2024-06-04 16:01:45,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077172574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:45,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:45,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:45,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505047632] [2024-06-04 16:01:45,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:45,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:45,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:45,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:45,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:45,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:01:45,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 271 transitions, 3511 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) [2024-06-04 16:01:45,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:45,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:01:45,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:45,783 INFO L124 PetriNetUnfolderBase]: 1676/2910 cut-off events. [2024-06-04 16:01:45,783 INFO L125 PetriNetUnfolderBase]: For 144500/144500 co-relation queries the response was YES. [2024-06-04 16:01:45,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18613 conditions, 2910 events. 1676/2910 cut-off events. For 144500/144500 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 17915 event pairs, 259 based on Foata normal form. 8/2892 useless extension candidates. Maximal degree in co-relation 18512. Up to 2321 conditions per place. [2024-06-04 16:01:45,813 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 213 selfloop transitions, 30 changer transitions 0/298 dead transitions. [2024-06-04 16:01:45,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 298 transitions, 4107 flow [2024-06-04 16:01:45,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:45,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:45,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-04 16:01:45,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-04 16:01:45,815 INFO L175 Difference]: Start difference. First operand has 215 places, 271 transitions, 3511 flow. Second operand 6 states and 155 transitions. [2024-06-04 16:01:45,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 298 transitions, 4107 flow [2024-06-04 16:01:46,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 298 transitions, 4052 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:46,179 INFO L231 Difference]: Finished difference. Result has 218 places, 272 transitions, 3540 flow [2024-06-04 16:01:46,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3458, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3540, PETRI_PLACES=218, PETRI_TRANSITIONS=272} [2024-06-04 16:01:46,180 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-04 16:01:46,180 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 272 transitions, 3540 flow [2024-06-04 16:01:46,180 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) [2024-06-04 16:01:46,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:46,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:46,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 16:01:46,180 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)] === [2024-06-04 16:01:46,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:46,181 INFO L85 PathProgramCache]: Analyzing trace with hash 246799973, now seen corresponding path program 4 times [2024-06-04 16:01:46,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:46,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608785800] [2024-06-04 16:01:46,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:46,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:46,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:46,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:46,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608785800] [2024-06-04 16:01:46,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608785800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:46,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:46,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:46,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890726238] [2024-06-04 16:01:46,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:46,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:46,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:46,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:46,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:46,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:01:46,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 272 transitions, 3540 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) [2024-06-04 16:01:46,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:46,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:01:46,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:46,885 INFO L124 PetriNetUnfolderBase]: 1686/2928 cut-off events. [2024-06-04 16:01:46,886 INFO L125 PetriNetUnfolderBase]: For 142324/142324 co-relation queries the response was YES. [2024-06-04 16:01:46,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18502 conditions, 2928 events. 1686/2928 cut-off events. For 142324/142324 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 17961 event pairs, 347 based on Foata normal form. 10/2912 useless extension candidates. Maximal degree in co-relation 18400. Up to 2398 conditions per place. [2024-06-04 16:01:46,916 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 209 selfloop transitions, 29 changer transitions 0/293 dead transitions. [2024-06-04 16:01:46,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 293 transitions, 4102 flow [2024-06-04 16:01:46,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:46,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:46,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 16:01:46,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 16:01:46,917 INFO L175 Difference]: Start difference. First operand has 218 places, 272 transitions, 3540 flow. Second operand 6 states and 148 transitions. [2024-06-04 16:01:46,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 293 transitions, 4102 flow [2024-06-04 16:01:47,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 293 transitions, 4036 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:47,309 INFO L231 Difference]: Finished difference. Result has 220 places, 273 transitions, 3558 flow [2024-06-04 16:01:47,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3558, PETRI_PLACES=220, PETRI_TRANSITIONS=273} [2024-06-04 16:01:47,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-04 16:01:47,310 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 273 transitions, 3558 flow [2024-06-04 16:01:47,310 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) [2024-06-04 16:01:47,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:47,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:47,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 16:01:47,310 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)] === [2024-06-04 16:01:47,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:47,311 INFO L85 PathProgramCache]: Analyzing trace with hash -35706805, now seen corresponding path program 1 times [2024-06-04 16:01:47,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:47,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19776198] [2024-06-04 16:01:47,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:47,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:47,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:47,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19776198] [2024-06-04 16:01:47,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19776198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:47,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:47,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:47,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256303440] [2024-06-04 16:01:47,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:47,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:47,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:47,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:47,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:47,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:47,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 273 transitions, 3558 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) [2024-06-04 16:01:47,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:47,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:47,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:48,024 INFO L124 PetriNetUnfolderBase]: 1808/3093 cut-off events. [2024-06-04 16:01:48,024 INFO L125 PetriNetUnfolderBase]: For 143293/143293 co-relation queries the response was YES. [2024-06-04 16:01:48,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19481 conditions, 3093 events. 1808/3093 cut-off events. For 143293/143293 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 18894 event pairs, 316 based on Foata normal form. 4/3091 useless extension candidates. Maximal degree in co-relation 19378. Up to 2572 conditions per place. [2024-06-04 16:01:48,056 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 217 selfloop transitions, 78 changer transitions 0/302 dead transitions. [2024-06-04 16:01:48,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 302 transitions, 4386 flow [2024-06-04 16:01:48,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:48,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-04 16:01:48,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-04 16:01:48,057 INFO L175 Difference]: Start difference. First operand has 220 places, 273 transitions, 3558 flow. Second operand 7 states and 169 transitions. [2024-06-04 16:01:48,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 302 transitions, 4386 flow [2024-06-04 16:01:48,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 302 transitions, 4324 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:48,452 INFO L231 Difference]: Finished difference. Result has 223 places, 279 transitions, 3740 flow [2024-06-04 16:01:48,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3740, PETRI_PLACES=223, PETRI_TRANSITIONS=279} [2024-06-04 16:01:48,452 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-04 16:01:48,452 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 279 transitions, 3740 flow [2024-06-04 16:01:48,453 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) [2024-06-04 16:01:48,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:48,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:48,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 16:01:48,453 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)] === [2024-06-04 16:01:48,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:48,453 INFO L85 PathProgramCache]: Analyzing trace with hash -32849845, now seen corresponding path program 2 times [2024-06-04 16:01:48,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:48,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111573628] [2024-06-04 16:01:48,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:48,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:48,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:48,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111573628] [2024-06-04 16:01:48,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111573628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:48,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:48,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:48,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296984806] [2024-06-04 16:01:48,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:48,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:48,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:48,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:48,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:48,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:48,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 279 transitions, 3740 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) [2024-06-04 16:01:48,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:48,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:48,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:49,173 INFO L124 PetriNetUnfolderBase]: 1824/3114 cut-off events. [2024-06-04 16:01:49,174 INFO L125 PetriNetUnfolderBase]: For 149235/149235 co-relation queries the response was YES. [2024-06-04 16:01:49,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19963 conditions, 3114 events. 1824/3114 cut-off events. For 149235/149235 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 19011 event pairs, 373 based on Foata normal form. 4/3112 useless extension candidates. Maximal degree in co-relation 19859. Up to 2668 conditions per place. [2024-06-04 16:01:49,205 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 220 selfloop transitions, 73 changer transitions 0/300 dead transitions. [2024-06-04 16:01:49,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 300 transitions, 4414 flow [2024-06-04 16:01:49,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:49,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:49,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 16:01:49,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-04 16:01:49,206 INFO L175 Difference]: Start difference. First operand has 223 places, 279 transitions, 3740 flow. Second operand 7 states and 164 transitions. [2024-06-04 16:01:49,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 300 transitions, 4414 flow [2024-06-04 16:01:49,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 300 transitions, 4277 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:49,602 INFO L231 Difference]: Finished difference. Result has 228 places, 282 transitions, 3805 flow [2024-06-04 16:01:49,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3617, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3805, PETRI_PLACES=228, PETRI_TRANSITIONS=282} [2024-06-04 16:01:49,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-04 16:01:49,603 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 282 transitions, 3805 flow [2024-06-04 16:01:49,603 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) [2024-06-04 16:01:49,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:49,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:49,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 16:01:49,604 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)] === [2024-06-04 16:01:49,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:49,604 INFO L85 PathProgramCache]: Analyzing trace with hash 82441325, now seen corresponding path program 3 times [2024-06-04 16:01:49,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:49,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916714369] [2024-06-04 16:01:49,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:49,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:49,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:49,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:49,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916714369] [2024-06-04 16:01:49,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916714369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:49,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:49,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:49,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698525057] [2024-06-04 16:01:49,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:49,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:49,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:49,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:49,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:49,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:49,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 282 transitions, 3805 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) [2024-06-04 16:01:49,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:49,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:49,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:50,376 INFO L124 PetriNetUnfolderBase]: 1896/3231 cut-off events. [2024-06-04 16:01:50,376 INFO L125 PetriNetUnfolderBase]: For 179351/179351 co-relation queries the response was YES. [2024-06-04 16:01:50,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20714 conditions, 3231 events. 1896/3231 cut-off events. For 179351/179351 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 19796 event pairs, 373 based on Foata normal form. 20/3248 useless extension candidates. Maximal degree in co-relation 20607. Up to 2811 conditions per place. [2024-06-04 16:01:50,414 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 258 selfloop transitions, 42 changer transitions 0/307 dead transitions. [2024-06-04 16:01:50,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 307 transitions, 4548 flow [2024-06-04 16:01:50,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:50,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:50,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-04 16:01:50,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-04 16:01:50,415 INFO L175 Difference]: Start difference. First operand has 228 places, 282 transitions, 3805 flow. Second operand 8 states and 183 transitions. [2024-06-04 16:01:50,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 307 transitions, 4548 flow [2024-06-04 16:01:50,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 307 transitions, 4386 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:50,869 INFO L231 Difference]: Finished difference. Result has 231 places, 287 transitions, 3819 flow [2024-06-04 16:01:50,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3645, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3819, PETRI_PLACES=231, PETRI_TRANSITIONS=287} [2024-06-04 16:01:50,870 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-04 16:01:50,870 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 287 transitions, 3819 flow [2024-06-04 16:01:50,870 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) [2024-06-04 16:01:50,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:50,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:50,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 16:01:50,871 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)] === [2024-06-04 16:01:50,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:50,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1492879661, now seen corresponding path program 1 times [2024-06-04 16:01:50,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:50,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438157205] [2024-06-04 16:01:50,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:50,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:51,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:51,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438157205] [2024-06-04 16:01:51,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438157205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:51,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:51,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:51,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891808029] [2024-06-04 16:01:51,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:51,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:51,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:51,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:51,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:51,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:51,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 287 transitions, 3819 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) [2024-06-04 16:01:51,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:51,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:51,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:51,630 INFO L124 PetriNetUnfolderBase]: 1904/3243 cut-off events. [2024-06-04 16:01:51,630 INFO L125 PetriNetUnfolderBase]: For 157211/157211 co-relation queries the response was YES. [2024-06-04 16:01:51,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20929 conditions, 3243 events. 1904/3243 cut-off events. For 157211/157211 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 19846 event pairs, 373 based on Foata normal form. 2/3242 useless extension candidates. Maximal degree in co-relation 20821. Up to 2917 conditions per place. [2024-06-04 16:01:51,664 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 274 selfloop transitions, 24 changer transitions 0/305 dead transitions. [2024-06-04 16:01:51,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 305 transitions, 4496 flow [2024-06-04 16:01:51,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:51,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:51,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-04 16:01:51,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5306122448979592 [2024-06-04 16:01:51,666 INFO L175 Difference]: Start difference. First operand has 231 places, 287 transitions, 3819 flow. Second operand 7 states and 156 transitions. [2024-06-04 16:01:51,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 305 transitions, 4496 flow [2024-06-04 16:01:52,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 305 transitions, 4388 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 16:01:52,166 INFO L231 Difference]: Finished difference. Result has 233 places, 290 transitions, 3819 flow [2024-06-04 16:01:52,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3711, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3819, PETRI_PLACES=233, PETRI_TRANSITIONS=290} [2024-06-04 16:01:52,166 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-04 16:01:52,166 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 290 transitions, 3819 flow [2024-06-04 16:01:52,167 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) [2024-06-04 16:01:52,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:52,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:52,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 16:01:52,167 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)] === [2024-06-04 16:01:52,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:52,167 INFO L85 PathProgramCache]: Analyzing trace with hash 453483979, now seen corresponding path program 4 times [2024-06-04 16:01:52,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:52,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389173890] [2024-06-04 16:01:52,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:52,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:52,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:52,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389173890] [2024-06-04 16:01:52,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389173890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:52,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:52,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:52,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80555611] [2024-06-04 16:01:52,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:52,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:52,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:52,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:52,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:52,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:52,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 290 transitions, 3819 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) [2024-06-04 16:01:52,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:52,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:52,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:53,032 INFO L124 PetriNetUnfolderBase]: 1963/3341 cut-off events. [2024-06-04 16:01:53,033 INFO L125 PetriNetUnfolderBase]: For 189420/189420 co-relation queries the response was YES. [2024-06-04 16:01:53,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21348 conditions, 3341 events. 1963/3341 cut-off events. For 189420/189420 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 20543 event pairs, 323 based on Foata normal form. 20/3358 useless extension candidates. Maximal degree in co-relation 21238. Up to 2699 conditions per place. [2024-06-04 16:01:53,069 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 230 selfloop transitions, 91 changer transitions 0/328 dead transitions. [2024-06-04 16:01:53,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 328 transitions, 4627 flow [2024-06-04 16:01:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:53,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:53,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-04 16:01:53,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-04 16:01:53,071 INFO L175 Difference]: Start difference. First operand has 233 places, 290 transitions, 3819 flow. Second operand 8 states and 202 transitions. [2024-06-04 16:01:53,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 328 transitions, 4627 flow [2024-06-04 16:01:53,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 328 transitions, 4548 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:53,573 INFO L231 Difference]: Finished difference. Result has 237 places, 294 transitions, 4016 flow [2024-06-04 16:01:53,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3740, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4016, PETRI_PLACES=237, PETRI_TRANSITIONS=294} [2024-06-04 16:01:53,574 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-04 16:01:53,574 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 294 transitions, 4016 flow [2024-06-04 16:01:53,574 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) [2024-06-04 16:01:53,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:53,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:53,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 16:01:53,574 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)] === [2024-06-04 16:01:53,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:53,575 INFO L85 PathProgramCache]: Analyzing trace with hash 453668677, now seen corresponding path program 2 times [2024-06-04 16:01:53,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:53,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569029455] [2024-06-04 16:01:53,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:53,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:53,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:53,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:53,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569029455] [2024-06-04 16:01:53,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569029455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:53,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:53,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:53,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453016952] [2024-06-04 16:01:53,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:53,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:53,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:53,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:53,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:53,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:53,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 294 transitions, 4016 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) [2024-06-04 16:01:53,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:53,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:53,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:54,339 INFO L124 PetriNetUnfolderBase]: 1976/3355 cut-off events. [2024-06-04 16:01:54,339 INFO L125 PetriNetUnfolderBase]: For 167127/167127 co-relation queries the response was YES. [2024-06-04 16:01:54,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22057 conditions, 3355 events. 1976/3355 cut-off events. For 167127/167127 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20604 event pairs, 380 based on Foata normal form. 2/3354 useless extension candidates. Maximal degree in co-relation 21946. Up to 3022 conditions per place. [2024-06-04 16:01:54,375 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 277 selfloop transitions, 29 changer transitions 0/313 dead transitions. [2024-06-04 16:01:54,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 313 transitions, 4747 flow [2024-06-04 16:01:54,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:54,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:54,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-04 16:01:54,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:01:54,376 INFO L175 Difference]: Start difference. First operand has 237 places, 294 transitions, 4016 flow. Second operand 6 states and 138 transitions. [2024-06-04 16:01:54,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 313 transitions, 4747 flow [2024-06-04 16:01:54,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 313 transitions, 4575 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:54,770 INFO L231 Difference]: Finished difference. Result has 238 places, 299 transitions, 3999 flow [2024-06-04 16:01:54,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3851, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3999, PETRI_PLACES=238, PETRI_TRANSITIONS=299} [2024-06-04 16:01:54,770 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-04 16:01:54,770 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 299 transitions, 3999 flow [2024-06-04 16:01:54,770 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) [2024-06-04 16:01:54,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:54,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:54,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 16:01:54,771 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)] === [2024-06-04 16:01:54,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:54,771 INFO L85 PathProgramCache]: Analyzing trace with hash 619181531, now seen corresponding path program 3 times [2024-06-04 16:01:54,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:54,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960686851] [2024-06-04 16:01:54,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:54,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:55,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:55,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960686851] [2024-06-04 16:01:55,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960686851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:55,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:55,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:55,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734823550] [2024-06-04 16:01:55,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:55,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:55,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:55,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:55,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:55,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:55,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 299 transitions, 3999 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) [2024-06-04 16:01:55,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:55,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:55,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:55,519 INFO L124 PetriNetUnfolderBase]: 1984/3367 cut-off events. [2024-06-04 16:01:55,520 INFO L125 PetriNetUnfolderBase]: For 166109/166109 co-relation queries the response was YES. [2024-06-04 16:01:55,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21810 conditions, 3367 events. 1984/3367 cut-off events. For 166109/166109 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 20660 event pairs, 382 based on Foata normal form. 2/3366 useless extension candidates. Maximal degree in co-relation 21698. Up to 3028 conditions per place. [2024-06-04 16:01:55,555 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 278 selfloop transitions, 29 changer transitions 0/314 dead transitions. [2024-06-04 16:01:55,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 314 transitions, 4689 flow [2024-06-04 16:01:55,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:55,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:55,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-04 16:01:55,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:01:55,556 INFO L175 Difference]: Start difference. First operand has 238 places, 299 transitions, 3999 flow. Second operand 5 states and 120 transitions. [2024-06-04 16:01:55,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 314 transitions, 4689 flow [2024-06-04 16:01:56,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 314 transitions, 4613 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:56,022 INFO L231 Difference]: Finished difference. Result has 241 places, 301 transitions, 4040 flow [2024-06-04 16:01:56,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3927, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4040, PETRI_PLACES=241, PETRI_TRANSITIONS=301} [2024-06-04 16:01:56,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-04 16:01:56,023 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 301 transitions, 4040 flow [2024-06-04 16:01:56,023 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) [2024-06-04 16:01:56,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:56,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:56,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 16:01:56,024 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)] === [2024-06-04 16:01:56,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:56,024 INFO L85 PathProgramCache]: Analyzing trace with hash 690140707, now seen corresponding path program 4 times [2024-06-04 16:01:56,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:56,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005463952] [2024-06-04 16:01:56,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:56,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:56,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:56,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005463952] [2024-06-04 16:01:56,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005463952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:56,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:56,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:56,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552425593] [2024-06-04 16:01:56,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:56,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:56,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:56,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:56,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:56,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:56,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 301 transitions, 4040 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) [2024-06-04 16:01:56,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:56,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:56,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:56,836 INFO L124 PetriNetUnfolderBase]: 1979/3359 cut-off events. [2024-06-04 16:01:56,836 INFO L125 PetriNetUnfolderBase]: For 163060/163063 co-relation queries the response was YES. [2024-06-04 16:01:56,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21609 conditions, 3359 events. 1979/3359 cut-off events. For 163060/163063 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 20613 event pairs, 380 based on Foata normal form. 4/3359 useless extension candidates. Maximal degree in co-relation 21496. Up to 3007 conditions per place. [2024-06-04 16:01:56,865 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 277 selfloop transitions, 30 changer transitions 0/314 dead transitions. [2024-06-04 16:01:56,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 314 transitions, 4724 flow [2024-06-04 16:01:56,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:56,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:56,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-04 16:01:56,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-04 16:01:56,866 INFO L175 Difference]: Start difference. First operand has 241 places, 301 transitions, 4040 flow. Second operand 5 states and 117 transitions. [2024-06-04 16:01:56,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 314 transitions, 4724 flow [2024-06-04 16:01:57,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 314 transitions, 4633 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:57,382 INFO L231 Difference]: Finished difference. Result has 243 places, 303 transitions, 4062 flow [2024-06-04 16:01:57,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3953, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4062, PETRI_PLACES=243, PETRI_TRANSITIONS=303} [2024-06-04 16:01:57,382 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-04 16:01:57,383 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 303 transitions, 4062 flow [2024-06-04 16:01:57,383 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) [2024-06-04 16:01:57,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:57,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:57,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 16:01:57,383 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)] === [2024-06-04 16:01:57,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:57,383 INFO L85 PathProgramCache]: Analyzing trace with hash -430236843, now seen corresponding path program 1 times [2024-06-04 16:01:57,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:57,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063502372] [2024-06-04 16:01:57,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:57,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:57,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:57,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063502372] [2024-06-04 16:01:57,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063502372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:57,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:57,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:01:57,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305054607] [2024-06-04 16:01:57,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:57,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:01:57,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:57,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:01:57,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:01:57,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:57,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 303 transitions, 4062 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:57,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:57,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:57,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:58,201 INFO L124 PetriNetUnfolderBase]: 1992/3378 cut-off events. [2024-06-04 16:01:58,201 INFO L125 PetriNetUnfolderBase]: For 162441/162441 co-relation queries the response was YES. [2024-06-04 16:01:58,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21744 conditions, 3378 events. 1992/3378 cut-off events. For 162441/162441 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 20711 event pairs, 379 based on Foata normal form. 1/3376 useless extension candidates. Maximal degree in co-relation 21630. Up to 3004 conditions per place. [2024-06-04 16:01:58,235 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 282 selfloop transitions, 40 changer transitions 0/329 dead transitions. [2024-06-04 16:01:58,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 329 transitions, 4956 flow [2024-06-04 16:01:58,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:58,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:58,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 16:01:58,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:01:58,236 INFO L175 Difference]: Start difference. First operand has 243 places, 303 transitions, 4062 flow. Second operand 6 states and 147 transitions. [2024-06-04 16:01:58,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 329 transitions, 4956 flow [2024-06-04 16:01:58,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 329 transitions, 4863 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:58,796 INFO L231 Difference]: Finished difference. Result has 246 places, 309 transitions, 4149 flow [2024-06-04 16:01:58,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3969, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4149, PETRI_PLACES=246, PETRI_TRANSITIONS=309} [2024-06-04 16:01:58,797 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-04 16:01:58,797 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 309 transitions, 4149 flow [2024-06-04 16:01:58,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:58,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:58,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:58,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 16:01:58,798 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)] === [2024-06-04 16:01:58,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:58,798 INFO L85 PathProgramCache]: Analyzing trace with hash -424522923, now seen corresponding path program 2 times [2024-06-04 16:01:58,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:58,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249023427] [2024-06-04 16:01:58,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:58,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:59,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:59,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249023427] [2024-06-04 16:01:59,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249023427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:59,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:59,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:01:59,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292117027] [2024-06-04 16:01:59,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:59,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:01:59,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:59,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:01:59,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:01:59,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:01:59,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 309 transitions, 4149 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:59,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:59,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:01:59,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:59,630 INFO L124 PetriNetUnfolderBase]: 1997/3385 cut-off events. [2024-06-04 16:01:59,630 INFO L125 PetriNetUnfolderBase]: For 168224/168224 co-relation queries the response was YES. [2024-06-04 16:01:59,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22078 conditions, 3385 events. 1997/3385 cut-off events. For 168224/168224 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 20774 event pairs, 379 based on Foata normal form. 1/3383 useless extension candidates. Maximal degree in co-relation 21963. Up to 3010 conditions per place. [2024-06-04 16:01:59,667 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 282 selfloop transitions, 45 changer transitions 0/334 dead transitions. [2024-06-04 16:01:59,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 334 transitions, 5023 flow [2024-06-04 16:01:59,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:59,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:59,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-04 16:01:59,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2024-06-04 16:01:59,669 INFO L175 Difference]: Start difference. First operand has 246 places, 309 transitions, 4149 flow. Second operand 8 states and 185 transitions. [2024-06-04 16:01:59,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 334 transitions, 5023 flow [2024-06-04 16:02:00,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 334 transitions, 4952 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:00,253 INFO L231 Difference]: Finished difference. Result has 251 places, 312 transitions, 4228 flow [2024-06-04 16:02:00,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4086, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4228, PETRI_PLACES=251, PETRI_TRANSITIONS=312} [2024-06-04 16:02:00,253 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-04 16:02:00,254 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 312 transitions, 4228 flow [2024-06-04 16:02:00,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:00,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:00,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:00,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 16:02:00,254 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)] === [2024-06-04 16:02:00,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:00,255 INFO L85 PathProgramCache]: Analyzing trace with hash -149306539, now seen corresponding path program 3 times [2024-06-04 16:02:00,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:00,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935461022] [2024-06-04 16:02:00,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:00,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:00,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:00,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935461022] [2024-06-04 16:02:00,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935461022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:00,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:00,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:00,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400227262] [2024-06-04 16:02:00,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:00,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:00,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:00,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:00,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:00,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:00,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 312 transitions, 4228 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:00,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:00,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:00,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:01,119 INFO L124 PetriNetUnfolderBase]: 2018/3410 cut-off events. [2024-06-04 16:02:01,119 INFO L125 PetriNetUnfolderBase]: For 172917/172920 co-relation queries the response was YES. [2024-06-04 16:02:01,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22476 conditions, 3410 events. 2018/3410 cut-off events. For 172917/172920 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 20904 event pairs, 401 based on Foata normal form. 1/3401 useless extension candidates. Maximal degree in co-relation 22360. Up to 2806 conditions per place. [2024-06-04 16:02:01,155 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 246 selfloop transitions, 114 changer transitions 0/367 dead transitions. [2024-06-04 16:02:01,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 367 transitions, 5714 flow [2024-06-04 16:02:01,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:02:01,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:02:01,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-04 16:02:01,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:02:01,157 INFO L175 Difference]: Start difference. First operand has 251 places, 312 transitions, 4228 flow. Second operand 10 states and 245 transitions. [2024-06-04 16:02:01,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 367 transitions, 5714 flow [2024-06-04 16:02:01,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 367 transitions, 5593 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:01,577 INFO L231 Difference]: Finished difference. Result has 255 places, 325 transitions, 4547 flow [2024-06-04 16:02:01,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4115, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4547, PETRI_PLACES=255, PETRI_TRANSITIONS=325} [2024-06-04 16:02:01,578 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-04 16:02:01,578 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 325 transitions, 4547 flow [2024-06-04 16:02:01,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:01,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:01,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:01,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 16:02:01,579 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)] === [2024-06-04 16:02:01,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:01,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1810165803, now seen corresponding path program 4 times [2024-06-04 16:02:01,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:01,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860894878] [2024-06-04 16:02:01,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:01,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:01,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:01,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:01,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860894878] [2024-06-04 16:02:01,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860894878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:01,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:01,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:01,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150989042] [2024-06-04 16:02:01,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:01,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:01,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:01,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:01,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:01,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:01,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 325 transitions, 4547 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:01,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:01,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:01,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:02,436 INFO L124 PetriNetUnfolderBase]: 2023/3419 cut-off events. [2024-06-04 16:02:02,437 INFO L125 PetriNetUnfolderBase]: For 175798/175801 co-relation queries the response was YES. [2024-06-04 16:02:02,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23110 conditions, 3419 events. 2023/3419 cut-off events. For 175798/175801 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 20976 event pairs, 401 based on Foata normal form. 1/3410 useless extension candidates. Maximal degree in co-relation 22994. Up to 2810 conditions per place. [2024-06-04 16:02:02,474 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 119 changer transitions 0/367 dead transitions. [2024-06-04 16:02:02,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 367 transitions, 5771 flow [2024-06-04 16:02:02,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:02:02,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:02:02,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 258 transitions. [2024-06-04 16:02:02,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-04 16:02:02,475 INFO L175 Difference]: Start difference. First operand has 255 places, 325 transitions, 4547 flow. Second operand 11 states and 258 transitions. [2024-06-04 16:02:02,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 367 transitions, 5771 flow [2024-06-04 16:02:02,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 367 transitions, 5523 flow, removed 73 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:02,857 INFO L231 Difference]: Finished difference. Result has 262 places, 328 transitions, 4597 flow [2024-06-04 16:02:02,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4319, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4597, PETRI_PLACES=262, PETRI_TRANSITIONS=328} [2024-06-04 16:02:02,858 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-04 16:02:02,858 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 328 transitions, 4597 flow [2024-06-04 16:02:02,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:02,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:02,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:02,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 16:02:02,858 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)] === [2024-06-04 16:02:02,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:02,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1288691669, now seen corresponding path program 5 times [2024-06-04 16:02:02,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:02,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745960832] [2024-06-04 16:02:02,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:02,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:03,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:03,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745960832] [2024-06-04 16:02:03,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745960832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:03,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:03,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:03,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407381550] [2024-06-04 16:02:03,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:03,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:03,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:03,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:03,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:03,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:03,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 328 transitions, 4597 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:03,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:03,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:03,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:03,798 INFO L124 PetriNetUnfolderBase]: 2044/3454 cut-off events. [2024-06-04 16:02:03,798 INFO L125 PetriNetUnfolderBase]: For 183506/183509 co-relation queries the response was YES. [2024-06-04 16:02:03,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23447 conditions, 3454 events. 2044/3454 cut-off events. For 183506/183509 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 21186 event pairs, 401 based on Foata normal form. 1/3445 useless extension candidates. Maximal degree in co-relation 23330. Up to 2829 conditions per place. [2024-06-04 16:02:03,830 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 126 changer transitions 0/368 dead transitions. [2024-06-04 16:02:03,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 368 transitions, 5861 flow [2024-06-04 16:02:03,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:02:03,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:02:03,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 254 transitions. [2024-06-04 16:02:03,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5497835497835498 [2024-06-04 16:02:03,832 INFO L175 Difference]: Start difference. First operand has 262 places, 328 transitions, 4597 flow. Second operand 11 states and 254 transitions. [2024-06-04 16:02:03,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 368 transitions, 5861 flow [2024-06-04 16:02:04,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 368 transitions, 5635 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:04,192 INFO L231 Difference]: Finished difference. Result has 267 places, 335 transitions, 4731 flow [2024-06-04 16:02:04,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4382, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4731, PETRI_PLACES=267, PETRI_TRANSITIONS=335} [2024-06-04 16:02:04,192 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-04 16:02:04,192 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 335 transitions, 4731 flow [2024-06-04 16:02:04,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:04,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:04,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:04,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 16:02:04,193 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)] === [2024-06-04 16:02:04,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:04,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1515900043, now seen corresponding path program 1 times [2024-06-04 16:02:04,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:04,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707458792] [2024-06-04 16:02:04,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:04,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:04,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:04,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707458792] [2024-06-04 16:02:04,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707458792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:04,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:04,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:04,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853881457] [2024-06-04 16:02:04,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:04,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:04,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:04,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:04,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:04,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:04,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 335 transitions, 4731 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:04,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:04,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:04,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:05,051 INFO L124 PetriNetUnfolderBase]: 2052/3482 cut-off events. [2024-06-04 16:02:05,052 INFO L125 PetriNetUnfolderBase]: For 190250/190250 co-relation queries the response was YES. [2024-06-04 16:02:05,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23648 conditions, 3482 events. 2052/3482 cut-off events. For 190250/190250 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 21508 event pairs, 298 based on Foata normal form. 2/3481 useless extension candidates. Maximal degree in co-relation 23530. Up to 3071 conditions per place. [2024-06-04 16:02:05,092 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 328 selfloop transitions, 27 changer transitions 0/362 dead transitions. [2024-06-04 16:02:05,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 362 transitions, 5695 flow [2024-06-04 16:02:05,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:05,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:05,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-04 16:02:05,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-04 16:02:05,093 INFO L175 Difference]: Start difference. First operand has 267 places, 335 transitions, 4731 flow. Second operand 6 states and 145 transitions. [2024-06-04 16:02:05,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 362 transitions, 5695 flow [2024-06-04 16:02:05,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 362 transitions, 5468 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:05,459 INFO L231 Difference]: Finished difference. Result has 267 places, 340 transitions, 4656 flow [2024-06-04 16:02:05,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4504, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4656, PETRI_PLACES=267, PETRI_TRANSITIONS=340} [2024-06-04 16:02:05,460 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-04 16:02:05,460 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 340 transitions, 4656 flow [2024-06-04 16:02:05,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:05,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:05,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:05,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 16:02:05,461 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)] === [2024-06-04 16:02:05,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:05,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1635754835, now seen corresponding path program 2 times [2024-06-04 16:02:05,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:05,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351146748] [2024-06-04 16:02:05,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:05,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:05,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:05,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:05,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351146748] [2024-06-04 16:02:05,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351146748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:05,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:05,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:05,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839743570] [2024-06-04 16:02:05,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:05,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:05,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:05,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:05,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:05,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:05,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 340 transitions, 4656 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:05,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:05,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:05,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:06,330 INFO L124 PetriNetUnfolderBase]: 2047/3475 cut-off events. [2024-06-04 16:02:06,330 INFO L125 PetriNetUnfolderBase]: For 191546/191546 co-relation queries the response was YES. [2024-06-04 16:02:06,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23392 conditions, 3475 events. 2047/3475 cut-off events. For 191546/191546 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 21438 event pairs, 376 based on Foata normal form. 2/3474 useless extension candidates. Maximal degree in co-relation 23272. Up to 3111 conditions per place. [2024-06-04 16:02:06,368 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 327 selfloop transitions, 23 changer transitions 0/357 dead transitions. [2024-06-04 16:02:06,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 357 transitions, 5398 flow [2024-06-04 16:02:06,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:06,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-04 16:02:06,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:02:06,370 INFO L175 Difference]: Start difference. First operand has 267 places, 340 transitions, 4656 flow. Second operand 6 states and 141 transitions. [2024-06-04 16:02:06,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 357 transitions, 5398 flow [2024-06-04 16:02:06,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 357 transitions, 5311 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-04 16:02:06,844 INFO L231 Difference]: Finished difference. Result has 271 places, 340 transitions, 4620 flow [2024-06-04 16:02:06,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4569, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4620, PETRI_PLACES=271, PETRI_TRANSITIONS=340} [2024-06-04 16:02:06,845 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-04 16:02:06,845 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 340 transitions, 4620 flow [2024-06-04 16:02:06,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:06,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:06,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:06,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 16:02:06,846 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)] === [2024-06-04 16:02:06,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:06,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1810178482, now seen corresponding path program 1 times [2024-06-04 16:02:06,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:06,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777434975] [2024-06-04 16:02:06,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:06,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:07,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:07,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777434975] [2024-06-04 16:02:07,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777434975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:07,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:07,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:07,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141466770] [2024-06-04 16:02:07,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:07,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:07,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:07,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:07,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:07,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:07,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 340 transitions, 4620 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) [2024-06-04 16:02:07,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:07,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:07,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:07,809 INFO L124 PetriNetUnfolderBase]: 2052/3478 cut-off events. [2024-06-04 16:02:07,810 INFO L125 PetriNetUnfolderBase]: For 195677/195680 co-relation queries the response was YES. [2024-06-04 16:02:07,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23450 conditions, 3478 events. 2052/3478 cut-off events. For 195677/195680 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 21496 event pairs, 416 based on Foata normal form. 1/3469 useless extension candidates. Maximal degree in co-relation 23328. Up to 2875 conditions per place. [2024-06-04 16:02:07,850 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 209 selfloop transitions, 150 changer transitions 0/366 dead transitions. [2024-06-04 16:02:07,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 366 transitions, 5692 flow [2024-06-04 16:02:07,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:07,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:07,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-04 16:02:07,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-04 16:02:07,851 INFO L175 Difference]: Start difference. First operand has 271 places, 340 transitions, 4620 flow. Second operand 8 states and 189 transitions. [2024-06-04 16:02:07,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 366 transitions, 5692 flow [2024-06-04 16:02:08,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 366 transitions, 5650 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:08,325 INFO L231 Difference]: Finished difference. Result has 275 places, 343 transitions, 4930 flow [2024-06-04 16:02:08,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4578, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4930, PETRI_PLACES=275, PETRI_TRANSITIONS=343} [2024-06-04 16:02:08,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-04 16:02:08,326 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 343 transitions, 4930 flow [2024-06-04 16:02:08,326 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) [2024-06-04 16:02:08,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:08,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:08,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 16:02:08,327 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)] === [2024-06-04 16:02:08,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:08,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1096354400, now seen corresponding path program 2 times [2024-06-04 16:02:08,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:08,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646075673] [2024-06-04 16:02:08,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:08,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:08,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:08,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646075673] [2024-06-04 16:02:08,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646075673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:08,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:08,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:08,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474411289] [2024-06-04 16:02:08,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:08,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:08,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:08,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:08,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:08,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:08,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 343 transitions, 4930 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) [2024-06-04 16:02:08,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:08,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:08,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:09,159 INFO L124 PetriNetUnfolderBase]: 2057/3487 cut-off events. [2024-06-04 16:02:09,159 INFO L125 PetriNetUnfolderBase]: For 203053/203056 co-relation queries the response was YES. [2024-06-04 16:02:09,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23957 conditions, 3487 events. 2057/3487 cut-off events. For 203053/203056 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21553 event pairs, 415 based on Foata normal form. 1/3478 useless extension candidates. Maximal degree in co-relation 23834. Up to 2881 conditions per place. [2024-06-04 16:02:09,200 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 209 selfloop transitions, 153 changer transitions 0/369 dead transitions. [2024-06-04 16:02:09,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 369 transitions, 6018 flow [2024-06-04 16:02:09,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:09,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:09,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 16:02:09,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-04 16:02:09,201 INFO L175 Difference]: Start difference. First operand has 275 places, 343 transitions, 4930 flow. Second operand 8 states and 191 transitions. [2024-06-04 16:02:09,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 369 transitions, 6018 flow [2024-06-04 16:02:09,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 369 transitions, 5764 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:09,741 INFO L231 Difference]: Finished difference. Result has 278 places, 346 transitions, 5040 flow [2024-06-04 16:02:09,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4679, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5040, PETRI_PLACES=278, PETRI_TRANSITIONS=346} [2024-06-04 16:02:09,742 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-04 16:02:09,742 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 346 transitions, 5040 flow [2024-06-04 16:02:09,742 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) [2024-06-04 16:02:09,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:09,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:09,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 16:02:09,743 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)] === [2024-06-04 16:02:09,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:09,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1039000996, now seen corresponding path program 3 times [2024-06-04 16:02:09,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:09,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110448989] [2024-06-04 16:02:09,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:09,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:09,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:09,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110448989] [2024-06-04 16:02:09,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110448989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:09,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:09,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:09,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748900944] [2024-06-04 16:02:09,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:09,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:09,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:09,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:09,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:10,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:10,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 346 transitions, 5040 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) [2024-06-04 16:02:10,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:10,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:10,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:10,677 INFO L124 PetriNetUnfolderBase]: 2070/3509 cut-off events. [2024-06-04 16:02:10,677 INFO L125 PetriNetUnfolderBase]: For 212226/212229 co-relation queries the response was YES. [2024-06-04 16:02:10,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24282 conditions, 3509 events. 2070/3509 cut-off events. For 212226/212229 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 21701 event pairs, 417 based on Foata normal form. 1/3500 useless extension candidates. Maximal degree in co-relation 24157. Up to 2896 conditions per place. [2024-06-04 16:02:10,714 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 208 selfloop transitions, 159 changer transitions 0/374 dead transitions. [2024-06-04 16:02:10,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 374 transitions, 6326 flow [2024-06-04 16:02:10,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:10,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:10,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-04 16:02:10,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:02:10,715 INFO L175 Difference]: Start difference. First operand has 278 places, 346 transitions, 5040 flow. Second operand 9 states and 207 transitions. [2024-06-04 16:02:10,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 374 transitions, 6326 flow [2024-06-04 16:02:11,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 374 transitions, 5972 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:11,345 INFO L231 Difference]: Finished difference. Result has 281 places, 352 transitions, 5120 flow [2024-06-04 16:02:11,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4698, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5120, PETRI_PLACES=281, PETRI_TRANSITIONS=352} [2024-06-04 16:02:11,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-04 16:02:11,346 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 352 transitions, 5120 flow [2024-06-04 16:02:11,346 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) [2024-06-04 16:02:11,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:11,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:11,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 16:02:11,347 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)] === [2024-06-04 16:02:11,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:11,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1288678990, now seen corresponding path program 4 times [2024-06-04 16:02:11,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:11,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784031488] [2024-06-04 16:02:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:11,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:11,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:11,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784031488] [2024-06-04 16:02:11,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784031488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:11,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:11,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:11,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454172154] [2024-06-04 16:02:11,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:11,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:11,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:11,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:11,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:11,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:11,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 352 transitions, 5120 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) [2024-06-04 16:02:11,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:11,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:11,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:12,219 INFO L124 PetriNetUnfolderBase]: 2075/3515 cut-off events. [2024-06-04 16:02:12,219 INFO L125 PetriNetUnfolderBase]: For 218041/218044 co-relation queries the response was YES. [2024-06-04 16:02:12,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24403 conditions, 3515 events. 2075/3515 cut-off events. For 218041/218044 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 21767 event pairs, 420 based on Foata normal form. 1/3503 useless extension candidates. Maximal degree in co-relation 24277. Up to 2902 conditions per place. [2024-06-04 16:02:12,264 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 208 selfloop transitions, 160 changer transitions 0/375 dead transitions. [2024-06-04 16:02:12,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 375 transitions, 6223 flow [2024-06-04 16:02:12,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:12,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:12,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-04 16:02:12,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:02:12,266 INFO L175 Difference]: Start difference. First operand has 281 places, 352 transitions, 5120 flow. Second operand 8 states and 188 transitions. [2024-06-04 16:02:12,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 375 transitions, 6223 flow [2024-06-04 16:02:12,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 375 transitions, 5916 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:12,917 INFO L231 Difference]: Finished difference. Result has 284 places, 355 transitions, 5194 flow [2024-06-04 16:02:12,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4838, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5194, PETRI_PLACES=284, PETRI_TRANSITIONS=355} [2024-06-04 16:02:12,917 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-04 16:02:12,917 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 355 transitions, 5194 flow [2024-06-04 16:02:12,917 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) [2024-06-04 16:02:12,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:12,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:12,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 16:02:12,918 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)] === [2024-06-04 16:02:12,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:12,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1267122556, now seen corresponding path program 5 times [2024-06-04 16:02:12,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:12,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395047763] [2024-06-04 16:02:12,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:12,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:13,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:13,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395047763] [2024-06-04 16:02:13,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395047763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:13,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:13,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:13,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795544757] [2024-06-04 16:02:13,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:13,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:13,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:13,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:13,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:13,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:13,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 355 transitions, 5194 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) [2024-06-04 16:02:13,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:13,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:13,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:13,767 INFO L124 PetriNetUnfolderBase]: 2080/3530 cut-off events. [2024-06-04 16:02:13,768 INFO L125 PetriNetUnfolderBase]: For 224994/224997 co-relation queries the response was YES. [2024-06-04 16:02:13,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24516 conditions, 3530 events. 2080/3530 cut-off events. For 224994/224997 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 21892 event pairs, 412 based on Foata normal form. 1/3524 useless extension candidates. Maximal degree in co-relation 24388. Up to 2908 conditions per place. [2024-06-04 16:02:13,809 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 210 selfloop transitions, 163 changer transitions 0/380 dead transitions. [2024-06-04 16:02:13,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 380 transitions, 6452 flow [2024-06-04 16:02:13,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:13,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:13,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-04 16:02:13,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5529100529100529 [2024-06-04 16:02:13,810 INFO L175 Difference]: Start difference. First operand has 284 places, 355 transitions, 5194 flow. Second operand 9 states and 209 transitions. [2024-06-04 16:02:13,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 380 transitions, 6452 flow [2024-06-04 16:02:14,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 380 transitions, 6212 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:14,503 INFO L231 Difference]: Finished difference. Result has 288 places, 358 transitions, 5344 flow [2024-06-04 16:02:14,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4957, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5344, PETRI_PLACES=288, PETRI_TRANSITIONS=358} [2024-06-04 16:02:14,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-04 16:02:14,504 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 358 transitions, 5344 flow [2024-06-04 16:02:14,504 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) [2024-06-04 16:02:14,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:14,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:14,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 16:02:14,504 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)] === [2024-06-04 16:02:14,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:14,505 INFO L85 PathProgramCache]: Analyzing trace with hash -206065301, now seen corresponding path program 6 times [2024-06-04 16:02:14,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:14,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287416769] [2024-06-04 16:02:14,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:14,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:14,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:14,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287416769] [2024-06-04 16:02:14,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287416769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:14,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:14,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:14,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475408327] [2024-06-04 16:02:14,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:14,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:14,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:14,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:14,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:14,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:14,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 358 transitions, 5344 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:14,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:14,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:14,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:15,530 INFO L124 PetriNetUnfolderBase]: 2098/3557 cut-off events. [2024-06-04 16:02:15,531 INFO L125 PetriNetUnfolderBase]: For 236681/236681 co-relation queries the response was YES. [2024-06-04 16:02:15,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24846 conditions, 3557 events. 2098/3557 cut-off events. For 236681/236681 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 22106 event pairs, 385 based on Foata normal form. 2/3553 useless extension candidates. Maximal degree in co-relation 24716. Up to 2961 conditions per place. [2024-06-04 16:02:15,566 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 286 selfloop transitions, 98 changer transitions 0/391 dead transitions. [2024-06-04 16:02:15,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 391 transitions, 6520 flow [2024-06-04 16:02:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:15,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:15,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-04 16:02:15,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-04 16:02:15,568 INFO L175 Difference]: Start difference. First operand has 288 places, 358 transitions, 5344 flow. Second operand 8 states and 193 transitions. [2024-06-04 16:02:15,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 391 transitions, 6520 flow [2024-06-04 16:02:16,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 391 transitions, 5917 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-04 16:02:16,248 INFO L231 Difference]: Finished difference. Result has 288 places, 365 transitions, 5053 flow [2024-06-04 16:02:16,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4741, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5053, PETRI_PLACES=288, PETRI_TRANSITIONS=365} [2024-06-04 16:02:16,248 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-04 16:02:16,248 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 365 transitions, 5053 flow [2024-06-04 16:02:16,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:16,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:16,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:16,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 16:02:16,249 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)] === [2024-06-04 16:02:16,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:16,249 INFO L85 PathProgramCache]: Analyzing trace with hash -760305621, now seen corresponding path program 7 times [2024-06-04 16:02:16,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:16,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317087734] [2024-06-04 16:02:16,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:16,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:16,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:16,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317087734] [2024-06-04 16:02:16,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317087734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:16,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:16,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:16,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079550707] [2024-06-04 16:02:16,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:16,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:16,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:16,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:16,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:16,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:16,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 365 transitions, 5053 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:16,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:16,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:16,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:17,177 INFO L124 PetriNetUnfolderBase]: 2092/3550 cut-off events. [2024-06-04 16:02:17,177 INFO L125 PetriNetUnfolderBase]: For 235213/235213 co-relation queries the response was YES. [2024-06-04 16:02:17,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24317 conditions, 3550 events. 2092/3550 cut-off events. For 235213/235213 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 22070 event pairs, 382 based on Foata normal form. 2/3546 useless extension candidates. Maximal degree in co-relation 24187. Up to 2894 conditions per place. [2024-06-04 16:02:17,221 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 274 selfloop transitions, 119 changer transitions 0/400 dead transitions. [2024-06-04 16:02:17,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 400 transitions, 6201 flow [2024-06-04 16:02:17,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:02:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:02:17,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 256 transitions. [2024-06-04 16:02:17,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541125541125541 [2024-06-04 16:02:17,222 INFO L175 Difference]: Start difference. First operand has 288 places, 365 transitions, 5053 flow. Second operand 11 states and 256 transitions. [2024-06-04 16:02:17,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 400 transitions, 6201 flow [2024-06-04 16:02:17,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 400 transitions, 5951 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:17,973 INFO L231 Difference]: Finished difference. Result has 294 places, 365 transitions, 5048 flow [2024-06-04 16:02:17,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4803, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5048, PETRI_PLACES=294, PETRI_TRANSITIONS=365} [2024-06-04 16:02:17,974 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-04 16:02:17,974 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 365 transitions, 5048 flow [2024-06-04 16:02:17,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:17,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:17,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:17,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 16:02:17,979 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)] === [2024-06-04 16:02:17,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:17,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1747873749, now seen corresponding path program 8 times [2024-06-04 16:02:17,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:17,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684998451] [2024-06-04 16:02:17,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:17,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:18,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:18,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684998451] [2024-06-04 16:02:18,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684998451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:18,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:18,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:18,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190752551] [2024-06-04 16:02:18,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:18,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:18,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:18,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:18,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:18,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:18,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 365 transitions, 5048 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:18,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:18,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:18,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:19,025 INFO L124 PetriNetUnfolderBase]: 2128/3616 cut-off events. [2024-06-04 16:02:19,025 INFO L125 PetriNetUnfolderBase]: For 250702/250702 co-relation queries the response was YES. [2024-06-04 16:02:19,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24813 conditions, 3616 events. 2128/3616 cut-off events. For 250702/250702 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 22535 event pairs, 377 based on Foata normal form. 4/3617 useless extension candidates. Maximal degree in co-relation 24683. Up to 3199 conditions per place. [2024-06-04 16:02:19,068 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 336 selfloop transitions, 52 changer transitions 0/395 dead transitions. [2024-06-04 16:02:19,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 395 transitions, 6192 flow [2024-06-04 16:02:19,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:19,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-04 16:02:19,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-04 16:02:19,070 INFO L175 Difference]: Start difference. First operand has 294 places, 365 transitions, 5048 flow. Second operand 8 states and 183 transitions. [2024-06-04 16:02:19,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 395 transitions, 6192 flow [2024-06-04 16:02:19,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 395 transitions, 5916 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-04 16:02:19,700 INFO L231 Difference]: Finished difference. Result has 294 places, 379 transitions, 5118 flow [2024-06-04 16:02:19,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4790, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5118, PETRI_PLACES=294, PETRI_TRANSITIONS=379} [2024-06-04 16:02:19,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-04 16:02:19,701 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 379 transitions, 5118 flow [2024-06-04 16:02:19,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:19,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:19,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:19,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 16:02:19,702 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)] === [2024-06-04 16:02:19,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:19,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1164513933, now seen corresponding path program 9 times [2024-06-04 16:02:19,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:19,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817072542] [2024-06-04 16:02:19,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:19,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:19,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:19,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:19,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817072542] [2024-06-04 16:02:19,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817072542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:19,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:19,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:19,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815550804] [2024-06-04 16:02:19,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:19,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:19,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:19,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:19,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:20,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:20,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 379 transitions, 5118 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:20,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:20,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:20,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:20,690 INFO L124 PetriNetUnfolderBase]: 2172/3691 cut-off events. [2024-06-04 16:02:20,691 INFO L125 PetriNetUnfolderBase]: For 266291/266291 co-relation queries the response was YES. [2024-06-04 16:02:20,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25733 conditions, 3691 events. 2172/3691 cut-off events. For 266291/266291 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 23113 event pairs, 378 based on Foata normal form. 4/3692 useless extension candidates. Maximal degree in co-relation 25601. Up to 3013 conditions per place. [2024-06-04 16:02:20,738 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 292 selfloop transitions, 128 changer transitions 0/427 dead transitions. [2024-06-04 16:02:20,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 427 transitions, 6407 flow [2024-06-04 16:02:20,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:20,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:20,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-04 16:02:20,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-04 16:02:20,740 INFO L175 Difference]: Start difference. First operand has 294 places, 379 transitions, 5118 flow. Second operand 8 states and 204 transitions. [2024-06-04 16:02:20,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 427 transitions, 6407 flow [2024-06-04 16:02:21,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 427 transitions, 6281 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:21,382 INFO L231 Difference]: Finished difference. Result has 299 places, 395 transitions, 5578 flow [2024-06-04 16:02:21,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4992, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5578, PETRI_PLACES=299, PETRI_TRANSITIONS=395} [2024-06-04 16:02:21,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-04 16:02:21,383 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 395 transitions, 5578 flow [2024-06-04 16:02:21,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:21,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:21,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:21,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 16:02:21,384 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)] === [2024-06-04 16:02:21,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:21,384 INFO L85 PathProgramCache]: Analyzing trace with hash -946775411, now seen corresponding path program 10 times [2024-06-04 16:02:21,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:21,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139167297] [2024-06-04 16:02:21,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:21,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:21,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:21,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139167297] [2024-06-04 16:02:21,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139167297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:21,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:21,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:21,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75024889] [2024-06-04 16:02:21,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:21,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:21,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:21,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:21,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:21,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:21,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 395 transitions, 5578 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:21,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:21,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:21,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:22,354 INFO L124 PetriNetUnfolderBase]: 2174/3696 cut-off events. [2024-06-04 16:02:22,354 INFO L125 PetriNetUnfolderBase]: For 269757/269760 co-relation queries the response was YES. [2024-06-04 16:02:22,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26744 conditions, 3696 events. 2174/3696 cut-off events. For 269757/269760 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23218 event pairs, 386 based on Foata normal form. 4/3696 useless extension candidates. Maximal degree in co-relation 26609. Up to 3015 conditions per place. [2024-06-04 16:02:22,401 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 286 selfloop transitions, 136 changer transitions 0/429 dead transitions. [2024-06-04 16:02:22,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 429 transitions, 6904 flow [2024-06-04 16:02:22,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:22,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:22,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-04 16:02:22,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-04 16:02:22,403 INFO L175 Difference]: Start difference. First operand has 299 places, 395 transitions, 5578 flow. Second operand 7 states and 183 transitions. [2024-06-04 16:02:22,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 429 transitions, 6904 flow [2024-06-04 16:02:23,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 429 transitions, 6725 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:23,265 INFO L231 Difference]: Finished difference. Result has 302 places, 401 transitions, 5819 flow [2024-06-04 16:02:23,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5423, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5819, PETRI_PLACES=302, PETRI_TRANSITIONS=401} [2024-06-04 16:02:23,265 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-04 16:02:23,266 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 401 transitions, 5819 flow [2024-06-04 16:02:23,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:23,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:23,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:23,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 16:02:23,266 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)] === [2024-06-04 16:02:23,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:23,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1341894059, now seen corresponding path program 11 times [2024-06-04 16:02:23,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:23,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366119631] [2024-06-04 16:02:23,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:23,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:23,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:23,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366119631] [2024-06-04 16:02:23,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366119631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:23,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:23,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:23,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337865099] [2024-06-04 16:02:23,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:23,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:23,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:23,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:23,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:23,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:23,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 401 transitions, 5819 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:23,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:23,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:23,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:24,212 INFO L124 PetriNetUnfolderBase]: 2168/3686 cut-off events. [2024-06-04 16:02:24,212 INFO L125 PetriNetUnfolderBase]: For 255395/255395 co-relation queries the response was YES. [2024-06-04 16:02:24,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26363 conditions, 3686 events. 2168/3686 cut-off events. For 255395/255395 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23120 event pairs, 377 based on Foata normal form. 2/3685 useless extension candidates. Maximal degree in co-relation 26227. Up to 3255 conditions per place. [2024-06-04 16:02:24,332 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 371 selfloop transitions, 41 changer transitions 0/419 dead transitions. [2024-06-04 16:02:24,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 419 transitions, 6689 flow [2024-06-04 16:02:24,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:02:24,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:02:24,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-04 16:02:24,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-04 16:02:24,334 INFO L175 Difference]: Start difference. First operand has 302 places, 401 transitions, 5819 flow. Second operand 5 states and 130 transitions. [2024-06-04 16:02:24,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 419 transitions, 6689 flow [2024-06-04 16:02:25,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 419 transitions, 6451 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:25,011 INFO L231 Difference]: Finished difference. Result has 303 places, 401 transitions, 5689 flow [2024-06-04 16:02:25,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5581, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5689, PETRI_PLACES=303, PETRI_TRANSITIONS=401} [2024-06-04 16:02:25,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-04 16:02:25,012 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 401 transitions, 5689 flow [2024-06-04 16:02:25,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:25,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:25,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:25,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 16:02:25,013 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)] === [2024-06-04 16:02:25,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:25,013 INFO L85 PathProgramCache]: Analyzing trace with hash 7896876, now seen corresponding path program 6 times [2024-06-04 16:02:25,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:25,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117511252] [2024-06-04 16:02:25,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:25,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:25,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:25,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:25,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117511252] [2024-06-04 16:02:25,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117511252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:25,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:25,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:25,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375136323] [2024-06-04 16:02:25,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:25,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:25,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:25,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:25,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:25,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:25,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 401 transitions, 5689 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) [2024-06-04 16:02:25,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:25,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:25,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:25,912 INFO L124 PetriNetUnfolderBase]: 2165/3667 cut-off events. [2024-06-04 16:02:25,912 INFO L125 PetriNetUnfolderBase]: For 250119/250119 co-relation queries the response was YES. [2024-06-04 16:02:25,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26239 conditions, 3667 events. 2165/3667 cut-off events. For 250119/250119 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 22936 event pairs, 389 based on Foata normal form. 1/3662 useless extension candidates. Maximal degree in co-relation 26102. Up to 3028 conditions per place. [2024-06-04 16:02:25,962 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 259 selfloop transitions, 155 changer transitions 0/421 dead transitions. [2024-06-04 16:02:25,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 421 transitions, 6849 flow [2024-06-04 16:02:25,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:25,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:25,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 16:02:25,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-04 16:02:25,964 INFO L175 Difference]: Start difference. First operand has 303 places, 401 transitions, 5689 flow. Second operand 8 states and 187 transitions. [2024-06-04 16:02:25,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 421 transitions, 6849 flow [2024-06-04 16:02:26,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 421 transitions, 6737 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:26,891 INFO L231 Difference]: Finished difference. Result has 306 places, 401 transitions, 5897 flow [2024-06-04 16:02:26,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5581, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5897, PETRI_PLACES=306, PETRI_TRANSITIONS=401} [2024-06-04 16:02:26,892 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-04 16:02:26,892 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 401 transitions, 5897 flow [2024-06-04 16:02:26,892 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) [2024-06-04 16:02:26,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:26,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:26,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 16:02:26,893 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)] === [2024-06-04 16:02:26,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:26,893 INFO L85 PathProgramCache]: Analyzing trace with hash -760298522, now seen corresponding path program 7 times [2024-06-04 16:02:26,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:26,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676917180] [2024-06-04 16:02:26,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:26,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:27,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:27,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676917180] [2024-06-04 16:02:27,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676917180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:27,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:27,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:27,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722407219] [2024-06-04 16:02:27,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:27,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:27,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:27,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:27,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:27,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:27,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 401 transitions, 5897 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) [2024-06-04 16:02:27,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:27,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:27,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:27,806 INFO L124 PetriNetUnfolderBase]: 2162/3663 cut-off events. [2024-06-04 16:02:27,806 INFO L125 PetriNetUnfolderBase]: For 249147/249147 co-relation queries the response was YES. [2024-06-04 16:02:27,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26431 conditions, 3663 events. 2162/3663 cut-off events. For 249147/249147 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 22940 event pairs, 389 based on Foata normal form. 1/3658 useless extension candidates. Maximal degree in co-relation 26294. Up to 3025 conditions per place. [2024-06-04 16:02:27,848 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 259 selfloop transitions, 155 changer transitions 0/421 dead transitions. [2024-06-04 16:02:27,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 421 transitions, 7057 flow [2024-06-04 16:02:27,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:27,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:27,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-04 16:02:27,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:02:27,854 INFO L175 Difference]: Start difference. First operand has 306 places, 401 transitions, 5897 flow. Second operand 8 states and 188 transitions. [2024-06-04 16:02:27,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 421 transitions, 7057 flow [2024-06-04 16:02:28,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 421 transitions, 6831 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:28,802 INFO L231 Difference]: Finished difference. Result has 308 places, 401 transitions, 5987 flow [2024-06-04 16:02:28,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5671, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5987, PETRI_PLACES=308, PETRI_TRANSITIONS=401} [2024-06-04 16:02:28,803 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-04 16:02:28,803 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 401 transitions, 5987 flow [2024-06-04 16:02:28,803 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) [2024-06-04 16:02:28,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:28,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:28,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 16:02:28,803 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)] === [2024-06-04 16:02:28,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:28,804 INFO L85 PathProgramCache]: Analyzing trace with hash -250461596, now seen corresponding path program 8 times [2024-06-04 16:02:28,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:28,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379605357] [2024-06-04 16:02:28,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:28,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:29,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:29,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379605357] [2024-06-04 16:02:29,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379605357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:29,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:29,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:29,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628402525] [2024-06-04 16:02:29,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:29,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:29,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:29,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:29,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:29,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:29,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 401 transitions, 5987 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) [2024-06-04 16:02:29,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:29,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:29,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:29,678 INFO L124 PetriNetUnfolderBase]: 2167/3672 cut-off events. [2024-06-04 16:02:29,679 INFO L125 PetriNetUnfolderBase]: For 256823/256823 co-relation queries the response was YES. [2024-06-04 16:02:29,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26618 conditions, 3672 events. 2167/3672 cut-off events. For 256823/256823 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 23027 event pairs, 389 based on Foata normal form. 1/3667 useless extension candidates. Maximal degree in co-relation 26480. Up to 3031 conditions per place. [2024-06-04 16:02:29,725 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 168 changer transitions 0/425 dead transitions. [2024-06-04 16:02:29,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 425 transitions, 7363 flow [2024-06-04 16:02:29,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:29,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:29,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-04 16:02:29,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-04 16:02:29,726 INFO L175 Difference]: Start difference. First operand has 308 places, 401 transitions, 5987 flow. Second operand 8 states and 189 transitions. [2024-06-04 16:02:29,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 425 transitions, 7363 flow [2024-06-04 16:02:30,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 425 transitions, 6753 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-04 16:02:30,663 INFO L231 Difference]: Finished difference. Result has 306 places, 404 transitions, 5777 flow [2024-06-04 16:02:30,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5383, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5777, PETRI_PLACES=306, PETRI_TRANSITIONS=404} [2024-06-04 16:02:30,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-04 16:02:30,666 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 404 transitions, 5777 flow [2024-06-04 16:02:30,666 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) [2024-06-04 16:02:30,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:30,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:30,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 16:02:30,666 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)] === [2024-06-04 16:02:30,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:30,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1861270502, now seen corresponding path program 9 times [2024-06-04 16:02:30,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:30,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865116943] [2024-06-04 16:02:30,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:30,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:30,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:30,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:30,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865116943] [2024-06-04 16:02:30,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865116943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:30,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:30,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:30,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758860987] [2024-06-04 16:02:30,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:30,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:30,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:30,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:30,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:30,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:30,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 404 transitions, 5777 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) [2024-06-04 16:02:30,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:30,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:30,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:31,563 INFO L124 PetriNetUnfolderBase]: 2164/3668 cut-off events. [2024-06-04 16:02:31,563 INFO L125 PetriNetUnfolderBase]: For 256845/256845 co-relation queries the response was YES. [2024-06-04 16:02:31,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26497 conditions, 3668 events. 2164/3668 cut-off events. For 256845/256845 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 22961 event pairs, 389 based on Foata normal form. 1/3663 useless extension candidates. Maximal degree in co-relation 26360. Up to 3028 conditions per place. [2024-06-04 16:02:31,606 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 249 selfloop transitions, 168 changer transitions 0/424 dead transitions. [2024-06-04 16:02:31,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 424 transitions, 6951 flow [2024-06-04 16:02:31,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:31,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:31,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 16:02:31,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-04 16:02:31,607 INFO L175 Difference]: Start difference. First operand has 306 places, 404 transitions, 5777 flow. Second operand 8 states and 187 transitions. [2024-06-04 16:02:31,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 424 transitions, 6951 flow [2024-06-04 16:02:32,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 424 transitions, 6445 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:32,487 INFO L231 Difference]: Finished difference. Result has 307 places, 404 transitions, 5613 flow [2024-06-04 16:02:32,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5271, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5613, PETRI_PLACES=307, PETRI_TRANSITIONS=404} [2024-06-04 16:02:32,487 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-04 16:02:32,487 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 404 transitions, 5613 flow [2024-06-04 16:02:32,487 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) [2024-06-04 16:02:32,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:32,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:32,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 16:02:32,488 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)] === [2024-06-04 16:02:32,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:32,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1739146970, now seen corresponding path program 10 times [2024-06-04 16:02:32,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:32,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852347850] [2024-06-04 16:02:32,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:32,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:32,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:32,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:32,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852347850] [2024-06-04 16:02:32,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852347850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:32,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:32,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:32,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083634840] [2024-06-04 16:02:32,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:32,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:32,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:32,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:32,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:32,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:32,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 404 transitions, 5613 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) [2024-06-04 16:02:32,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:32,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:32,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:33,407 INFO L124 PetriNetUnfolderBase]: 2161/3669 cut-off events. [2024-06-04 16:02:33,407 INFO L125 PetriNetUnfolderBase]: For 258574/258574 co-relation queries the response was YES. [2024-06-04 16:02:33,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26254 conditions, 3669 events. 2161/3669 cut-off events. For 258574/258574 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 22991 event pairs, 377 based on Foata normal form. 1/3667 useless extension candidates. Maximal degree in co-relation 26117. Up to 3251 conditions per place. [2024-06-04 16:02:33,452 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 361 selfloop transitions, 53 changer transitions 0/421 dead transitions. [2024-06-04 16:02:33,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 421 transitions, 6629 flow [2024-06-04 16:02:33,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:33,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-04 16:02:33,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-04 16:02:33,454 INFO L175 Difference]: Start difference. First operand has 307 places, 404 transitions, 5613 flow. Second operand 9 states and 199 transitions. [2024-06-04 16:02:33,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 421 transitions, 6629 flow [2024-06-04 16:02:34,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 421 transitions, 6273 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:34,372 INFO L231 Difference]: Finished difference. Result has 309 places, 404 transitions, 5369 flow [2024-06-04 16:02:34,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5257, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5369, PETRI_PLACES=309, PETRI_TRANSITIONS=404} [2024-06-04 16:02:34,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-04 16:02:34,373 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 404 transitions, 5369 flow [2024-06-04 16:02:34,373 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) [2024-06-04 16:02:34,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:34,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:34,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 16:02:34,373 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)] === [2024-06-04 16:02:34,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:34,374 INFO L85 PathProgramCache]: Analyzing trace with hash -125418906, now seen corresponding path program 11 times [2024-06-04 16:02:34,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:34,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134723888] [2024-06-04 16:02:34,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:34,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:34,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:34,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134723888] [2024-06-04 16:02:34,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134723888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:34,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:34,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:34,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261833029] [2024-06-04 16:02:34,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:34,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:34,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:34,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:34,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:34,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:34,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 404 transitions, 5369 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) [2024-06-04 16:02:34,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:34,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:34,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:35,218 INFO L124 PetriNetUnfolderBase]: 2158/3665 cut-off events. [2024-06-04 16:02:35,219 INFO L125 PetriNetUnfolderBase]: For 260871/260871 co-relation queries the response was YES. [2024-06-04 16:02:35,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25921 conditions, 3665 events. 2158/3665 cut-off events. For 260871/260871 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 22992 event pairs, 377 based on Foata normal form. 1/3663 useless extension candidates. Maximal degree in co-relation 25783. Up to 3248 conditions per place. [2024-06-04 16:02:35,263 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 360 selfloop transitions, 53 changer transitions 0/420 dead transitions. [2024-06-04 16:02:35,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 420 transitions, 6233 flow [2024-06-04 16:02:35,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:35,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:35,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-04 16:02:35,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-04 16:02:35,264 INFO L175 Difference]: Start difference. First operand has 309 places, 404 transitions, 5369 flow. Second operand 9 states and 198 transitions. [2024-06-04 16:02:35,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 420 transitions, 6233 flow [2024-06-04 16:02:36,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 420 transitions, 6093 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-04 16:02:36,179 INFO L231 Difference]: Finished difference. Result has 310 places, 404 transitions, 5341 flow [2024-06-04 16:02:36,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5229, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5341, PETRI_PLACES=310, PETRI_TRANSITIONS=404} [2024-06-04 16:02:36,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-04 16:02:36,179 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 404 transitions, 5341 flow [2024-06-04 16:02:36,179 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) [2024-06-04 16:02:36,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:36,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:36,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 16:02:36,180 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)] === [2024-06-04 16:02:36,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:36,180 INFO L85 PathProgramCache]: Analyzing trace with hash -939411082, now seen corresponding path program 12 times [2024-06-04 16:02:36,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:36,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903753610] [2024-06-04 16:02:36,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:36,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:36,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:36,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903753610] [2024-06-04 16:02:36,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903753610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:36,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:36,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:36,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353621746] [2024-06-04 16:02:36,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:36,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:36,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:36,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:36,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:36,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:36,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 404 transitions, 5341 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) [2024-06-04 16:02:36,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:36,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:36,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:37,133 INFO L124 PetriNetUnfolderBase]: 2163/3675 cut-off events. [2024-06-04 16:02:37,134 INFO L125 PetriNetUnfolderBase]: For 267581/267584 co-relation queries the response was YES. [2024-06-04 16:02:37,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26039 conditions, 3675 events. 2163/3675 cut-off events. For 267581/267584 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 23084 event pairs, 386 based on Foata normal form. 3/3674 useless extension candidates. Maximal degree in co-relation 25900. Up to 3112 conditions per place. [2024-06-04 16:02:37,173 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 311 selfloop transitions, 113 changer transitions 0/431 dead transitions. [2024-06-04 16:02:37,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 431 transitions, 6597 flow [2024-06-04 16:02:37,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:37,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-04 16:02:37,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-04 16:02:37,174 INFO L175 Difference]: Start difference. First operand has 310 places, 404 transitions, 5341 flow. Second operand 9 states and 208 transitions. [2024-06-04 16:02:37,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 431 transitions, 6597 flow [2024-06-04 16:02:38,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 431 transitions, 6469 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-04 16:02:38,169 INFO L231 Difference]: Finished difference. Result has 311 places, 407 transitions, 5491 flow [2024-06-04 16:02:38,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5213, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5491, PETRI_PLACES=311, PETRI_TRANSITIONS=407} [2024-06-04 16:02:38,169 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-04 16:02:38,170 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 407 transitions, 5491 flow [2024-06-04 16:02:38,170 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) [2024-06-04 16:02:38,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:38,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:38,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 16:02:38,170 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)] === [2024-06-04 16:02:38,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:38,171 INFO L85 PathProgramCache]: Analyzing trace with hash -711992930, now seen corresponding path program 13 times [2024-06-04 16:02:38,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:38,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682143307] [2024-06-04 16:02:38,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:38,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:38,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:38,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682143307] [2024-06-04 16:02:38,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682143307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:38,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:38,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:38,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691559663] [2024-06-04 16:02:38,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:38,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:38,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:38,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:38,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:38,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:38,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 407 transitions, 5491 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) [2024-06-04 16:02:38,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:38,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:38,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:39,113 INFO L124 PetriNetUnfolderBase]: 2168/3683 cut-off events. [2024-06-04 16:02:39,113 INFO L125 PetriNetUnfolderBase]: For 274477/274477 co-relation queries the response was YES. [2024-06-04 16:02:39,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26362 conditions, 3683 events. 2168/3683 cut-off events. For 274477/274477 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 23097 event pairs, 377 based on Foata normal form. 1/3681 useless extension candidates. Maximal degree in co-relation 26222. Up to 3118 conditions per place. [2024-06-04 16:02:39,159 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 318 selfloop transitions, 115 changer transitions 0/440 dead transitions. [2024-06-04 16:02:39,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 440 transitions, 6791 flow [2024-06-04 16:02:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:39,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-04 16:02:39,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:02:39,161 INFO L175 Difference]: Start difference. First operand has 311 places, 407 transitions, 5491 flow. Second operand 9 states and 216 transitions. [2024-06-04 16:02:39,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 440 transitions, 6791 flow [2024-06-04 16:02:40,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 440 transitions, 6459 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:40,097 INFO L231 Difference]: Finished difference. Result has 313 places, 410 transitions, 5451 flow [2024-06-04 16:02:40,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5181, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5451, PETRI_PLACES=313, PETRI_TRANSITIONS=410} [2024-06-04 16:02:40,097 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-04 16:02:40,097 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 410 transitions, 5451 flow [2024-06-04 16:02:40,098 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) [2024-06-04 16:02:40,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:40,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:40,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 16:02:40,098 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)] === [2024-06-04 16:02:40,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:40,098 INFO L85 PathProgramCache]: Analyzing trace with hash -946762732, now seen corresponding path program 14 times [2024-06-04 16:02:40,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:40,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999155392] [2024-06-04 16:02:40,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:40,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:40,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:40,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999155392] [2024-06-04 16:02:40,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999155392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:40,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:40,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:40,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261851424] [2024-06-04 16:02:40,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:40,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:40,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:40,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:40,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:40,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:40,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 410 transitions, 5451 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) [2024-06-04 16:02:40,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:40,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:40,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:41,037 INFO L124 PetriNetUnfolderBase]: 2165/3680 cut-off events. [2024-06-04 16:02:41,037 INFO L125 PetriNetUnfolderBase]: For 277712/277715 co-relation queries the response was YES. [2024-06-04 16:02:41,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26249 conditions, 3680 events. 2165/3680 cut-off events. For 277712/277715 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 23085 event pairs, 386 based on Foata normal form. 3/3679 useless extension candidates. Maximal degree in co-relation 26108. Up to 3115 conditions per place. [2024-06-04 16:02:41,085 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 312 selfloop transitions, 116 changer transitions 0/435 dead transitions. [2024-06-04 16:02:41,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 435 transitions, 6525 flow [2024-06-04 16:02:41,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:41,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:41,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 16:02:41,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:02:41,087 INFO L175 Difference]: Start difference. First operand has 313 places, 410 transitions, 5451 flow. Second operand 8 states and 192 transitions. [2024-06-04 16:02:41,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 435 transitions, 6525 flow [2024-06-04 16:02:42,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 435 transitions, 6327 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:42,209 INFO L231 Difference]: Finished difference. Result has 314 places, 410 transitions, 5493 flow [2024-06-04 16:02:42,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5255, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5493, PETRI_PLACES=314, PETRI_TRANSITIONS=410} [2024-06-04 16:02:42,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-04 16:02:42,210 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 410 transitions, 5493 flow [2024-06-04 16:02:42,210 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) [2024-06-04 16:02:42,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:42,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:42,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 16:02:42,210 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)] === [2024-06-04 16:02:42,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:42,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1173240712, now seen corresponding path program 15 times [2024-06-04 16:02:42,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:42,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316632035] [2024-06-04 16:02:42,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:42,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:42,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:42,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316632035] [2024-06-04 16:02:42,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316632035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:42,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:42,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:42,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300591879] [2024-06-04 16:02:42,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:42,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:42,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:42,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:42,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:42,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:42,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 410 transitions, 5493 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) [2024-06-04 16:02:42,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:42,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:42,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:43,135 INFO L124 PetriNetUnfolderBase]: 2162/3675 cut-off events. [2024-06-04 16:02:43,135 INFO L125 PetriNetUnfolderBase]: For 274630/274630 co-relation queries the response was YES. [2024-06-04 16:02:43,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26153 conditions, 3675 events. 2162/3675 cut-off events. For 274630/274630 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 23038 event pairs, 377 based on Foata normal form. 1/3673 useless extension candidates. Maximal degree in co-relation 26012. Up to 3112 conditions per place. [2024-06-04 16:02:43,182 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 311 selfloop transitions, 120 changer transitions 0/438 dead transitions. [2024-06-04 16:02:43,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 438 transitions, 6425 flow [2024-06-04 16:02:43,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:43,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:43,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-04 16:02:43,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-04 16:02:43,183 INFO L175 Difference]: Start difference. First operand has 314 places, 410 transitions, 5493 flow. Second operand 9 states and 213 transitions. [2024-06-04 16:02:43,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 438 transitions, 6425 flow [2024-06-04 16:02:44,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 438 transitions, 6111 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-04 16:02:44,369 INFO L231 Difference]: Finished difference. Result has 315 places, 410 transitions, 5429 flow [2024-06-04 16:02:44,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5179, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5429, PETRI_PLACES=315, PETRI_TRANSITIONS=410} [2024-06-04 16:02:44,370 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-04 16:02:44,370 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 410 transitions, 5429 flow [2024-06-04 16:02:44,370 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) [2024-06-04 16:02:44,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:44,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:44,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 16:02:44,371 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)] === [2024-06-04 16:02:44,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:44,371 INFO L85 PathProgramCache]: Analyzing trace with hash -338719836, now seen corresponding path program 1 times [2024-06-04 16:02:44,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:44,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331165852] [2024-06-04 16:02:44,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:44,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:44,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:44,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331165852] [2024-06-04 16:02:44,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331165852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:44,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:44,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:44,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297879628] [2024-06-04 16:02:44,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:44,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:44,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:44,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:44,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:44,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:44,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 410 transitions, 5429 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) [2024-06-04 16:02:44,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:44,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:44,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:45,280 INFO L124 PetriNetUnfolderBase]: 2281/3872 cut-off events. [2024-06-04 16:02:45,281 INFO L125 PetriNetUnfolderBase]: For 360601/360601 co-relation queries the response was YES. [2024-06-04 16:02:45,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28464 conditions, 3872 events. 2281/3872 cut-off events. For 360601/360601 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24539 event pairs, 379 based on Foata normal form. 12/3878 useless extension candidates. Maximal degree in co-relation 28322. Up to 2746 conditions per place. [2024-06-04 16:02:45,331 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 244 selfloop transitions, 193 changer transitions 0/444 dead transitions. [2024-06-04 16:02:45,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 444 transitions, 6651 flow [2024-06-04 16:02:45,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:45,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:45,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-04 16:02:45,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-04 16:02:45,332 INFO L175 Difference]: Start difference. First operand has 315 places, 410 transitions, 5429 flow. Second operand 8 states and 195 transitions. [2024-06-04 16:02:45,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 444 transitions, 6651 flow [2024-06-04 16:02:46,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 444 transitions, 6309 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-04 16:02:46,469 INFO L231 Difference]: Finished difference. Result has 313 places, 414 transitions, 5568 flow [2024-06-04 16:02:46,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5089, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5568, PETRI_PLACES=313, PETRI_TRANSITIONS=414} [2024-06-04 16:02:46,469 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-04 16:02:46,469 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 414 transitions, 5568 flow [2024-06-04 16:02:46,469 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) [2024-06-04 16:02:46,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:46,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:46,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 16:02:46,470 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)] === [2024-06-04 16:02:46,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:46,470 INFO L85 PathProgramCache]: Analyzing trace with hash -250006206, now seen corresponding path program 2 times [2024-06-04 16:02:46,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:46,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889316903] [2024-06-04 16:02:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:46,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:46,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:46,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889316903] [2024-06-04 16:02:46,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889316903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:46,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:46,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:46,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269598168] [2024-06-04 16:02:46,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:46,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:46,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:46,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:46,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:46,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:46,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 414 transitions, 5568 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) [2024-06-04 16:02:46,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:46,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:46,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:47,503 INFO L124 PetriNetUnfolderBase]: 2337/3963 cut-off events. [2024-06-04 16:02:47,503 INFO L125 PetriNetUnfolderBase]: For 377020/377020 co-relation queries the response was YES. [2024-06-04 16:02:47,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29268 conditions, 3963 events. 2337/3963 cut-off events. For 377020/377020 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 25205 event pairs, 442 based on Foata normal form. 16/3973 useless extension candidates. Maximal degree in co-relation 29127. Up to 3237 conditions per place. [2024-06-04 16:02:47,547 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 255 selfloop transitions, 176 changer transitions 0/438 dead transitions. [2024-06-04 16:02:47,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 438 transitions, 6552 flow [2024-06-04 16:02:47,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:47,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-04 16:02:47,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:02:47,548 INFO L175 Difference]: Start difference. First operand has 313 places, 414 transitions, 5568 flow. Second operand 8 states and 188 transitions. [2024-06-04 16:02:47,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 438 transitions, 6552 flow [2024-06-04 16:02:48,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 438 transitions, 6303 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:48,650 INFO L231 Difference]: Finished difference. Result has 317 places, 416 transitions, 5727 flow [2024-06-04 16:02:48,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5319, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5727, PETRI_PLACES=317, PETRI_TRANSITIONS=416} [2024-06-04 16:02:48,650 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-04 16:02:48,650 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 416 transitions, 5727 flow [2024-06-04 16:02:48,650 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) [2024-06-04 16:02:48,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:48,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:48,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 16:02:48,651 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)] === [2024-06-04 16:02:48,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:48,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1018343894, now seen corresponding path program 3 times [2024-06-04 16:02:48,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:48,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787037407] [2024-06-04 16:02:48,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:48,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:48,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:48,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787037407] [2024-06-04 16:02:48,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787037407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:48,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:48,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:48,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769728444] [2024-06-04 16:02:48,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:48,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:48,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:48,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:48,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:48,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:48,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 416 transitions, 5727 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) [2024-06-04 16:02:48,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:48,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:48,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:49,657 INFO L124 PetriNetUnfolderBase]: 2377/4027 cut-off events. [2024-06-04 16:02:49,658 INFO L125 PetriNetUnfolderBase]: For 374545/374545 co-relation queries the response was YES. [2024-06-04 16:02:49,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30089 conditions, 4027 events. 2377/4027 cut-off events. For 374545/374545 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 25651 event pairs, 438 based on Foata normal form. 12/4033 useless extension candidates. Maximal degree in co-relation 29946. Up to 3241 conditions per place. [2024-06-04 16:02:49,707 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 256 selfloop transitions, 180 changer transitions 0/443 dead transitions. [2024-06-04 16:02:49,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 443 transitions, 6743 flow [2024-06-04 16:02:49,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:49,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 16:02:49,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-04 16:02:49,709 INFO L175 Difference]: Start difference. First operand has 317 places, 416 transitions, 5727 flow. Second operand 8 states and 191 transitions. [2024-06-04 16:02:49,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 443 transitions, 6743 flow [2024-06-04 16:02:50,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 443 transitions, 6371 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:50,786 INFO L231 Difference]: Finished difference. Result has 319 places, 418 transitions, 5774 flow [2024-06-04 16:02:50,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5355, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5774, PETRI_PLACES=319, PETRI_TRANSITIONS=418} [2024-06-04 16:02:50,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-04 16:02:50,786 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 418 transitions, 5774 flow [2024-06-04 16:02:50,787 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) [2024-06-04 16:02:50,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:50,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:50,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 16:02:50,787 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)] === [2024-06-04 16:02:50,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:50,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1739137050, now seen corresponding path program 4 times [2024-06-04 16:02:50,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:50,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850091159] [2024-06-04 16:02:50,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:50,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:51,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:51,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850091159] [2024-06-04 16:02:51,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850091159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:51,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:51,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:51,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733739832] [2024-06-04 16:02:51,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:51,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:51,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:51,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:51,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:51,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:51,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 418 transitions, 5774 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) [2024-06-04 16:02:51,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:51,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:51,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:51,812 INFO L124 PetriNetUnfolderBase]: 2433/4124 cut-off events. [2024-06-04 16:02:51,812 INFO L125 PetriNetUnfolderBase]: For 397534/397534 co-relation queries the response was YES. [2024-06-04 16:02:51,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30791 conditions, 4124 events. 2433/4124 cut-off events. For 397534/397534 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 26433 event pairs, 448 based on Foata normal form. 16/4137 useless extension candidates. Maximal degree in co-relation 30647. Up to 3615 conditions per place. [2024-06-04 16:02:51,866 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 378 selfloop transitions, 55 changer transitions 0/440 dead transitions. [2024-06-04 16:02:51,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 440 transitions, 6764 flow [2024-06-04 16:02:51,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:51,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:51,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-04 16:02:51,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-04 16:02:51,868 INFO L175 Difference]: Start difference. First operand has 319 places, 418 transitions, 5774 flow. Second operand 9 states and 201 transitions. [2024-06-04 16:02:51,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 440 transitions, 6764 flow [2024-06-04 16:02:52,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 440 transitions, 6373 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:52,878 INFO L231 Difference]: Finished difference. Result has 322 places, 420 transitions, 5557 flow [2024-06-04 16:02:52,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5383, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5557, PETRI_PLACES=322, PETRI_TRANSITIONS=420} [2024-06-04 16:02:52,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-04 16:02:52,878 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 420 transitions, 5557 flow [2024-06-04 16:02:52,878 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) [2024-06-04 16:02:52,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:52,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:52,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 16:02:52,879 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)] === [2024-06-04 16:02:52,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:52,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1739284920, now seen corresponding path program 5 times [2024-06-04 16:02:52,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:52,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328267482] [2024-06-04 16:02:52,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:52,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:53,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:53,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:53,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328267482] [2024-06-04 16:02:53,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328267482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:53,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:53,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:53,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910679424] [2024-06-04 16:02:53,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:53,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:53,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:53,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:53,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:53,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:53,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 420 transitions, 5557 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) [2024-06-04 16:02:53,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:53,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:53,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:53,927 INFO L124 PetriNetUnfolderBase]: 2519/4262 cut-off events. [2024-06-04 16:02:53,927 INFO L125 PetriNetUnfolderBase]: For 421550/421550 co-relation queries the response was YES. [2024-06-04 16:02:53,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32086 conditions, 4262 events. 2519/4262 cut-off events. For 421550/421550 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 27350 event pairs, 458 based on Foata normal form. 12/4271 useless extension candidates. Maximal degree in co-relation 31941. Up to 3575 conditions per place. [2024-06-04 16:02:53,984 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 378 selfloop transitions, 62 changer transitions 0/447 dead transitions. [2024-06-04 16:02:53,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 447 transitions, 6775 flow [2024-06-04 16:02:53,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:53,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-04 16:02:53,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-04 16:02:53,986 INFO L175 Difference]: Start difference. First operand has 322 places, 420 transitions, 5557 flow. Second operand 9 states and 204 transitions. [2024-06-04 16:02:53,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 447 transitions, 6775 flow [2024-06-04 16:02:55,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 447 transitions, 6637 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:55,314 INFO L231 Difference]: Finished difference. Result has 324 places, 423 transitions, 5636 flow [2024-06-04 16:02:55,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5419, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5636, PETRI_PLACES=324, PETRI_TRANSITIONS=423} [2024-06-04 16:02:55,315 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-04 16:02:55,315 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 423 transitions, 5636 flow [2024-06-04 16:02:55,315 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) [2024-06-04 16:02:55,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:55,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:55,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 16:02:55,315 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)] === [2024-06-04 16:02:55,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:55,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1733559468, now seen corresponding path program 1 times [2024-06-04 16:02:55,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:55,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575432011] [2024-06-04 16:02:55,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:55,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:55,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:55,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575432011] [2024-06-04 16:02:55,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575432011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:55,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:55,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:55,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449743927] [2024-06-04 16:02:55,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:55,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:55,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:55,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:55,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:55,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:55,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 423 transitions, 5636 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) [2024-06-04 16:02:55,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:55,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:55,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:56,398 INFO L124 PetriNetUnfolderBase]: 2625/4438 cut-off events. [2024-06-04 16:02:56,399 INFO L125 PetriNetUnfolderBase]: For 467690/467690 co-relation queries the response was YES. [2024-06-04 16:02:56,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34059 conditions, 4438 events. 2625/4438 cut-off events. For 467690/467690 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 28695 event pairs, 483 based on Foata normal form. 12/4447 useless extension candidates. Maximal degree in co-relation 33913. Up to 3791 conditions per place. [2024-06-04 16:02:56,457 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 407 selfloop transitions, 37 changer transitions 0/451 dead transitions. [2024-06-04 16:02:56,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 451 transitions, 6872 flow [2024-06-04 16:02:56,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:56,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:56,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-04 16:02:56,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-04 16:02:56,458 INFO L175 Difference]: Start difference. First operand has 324 places, 423 transitions, 5636 flow. Second operand 9 states and 201 transitions. [2024-06-04 16:02:56,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 451 transitions, 6872 flow [2024-06-04 16:02:57,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 451 transitions, 6764 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:57,966 INFO L231 Difference]: Finished difference. Result has 329 places, 427 transitions, 5716 flow [2024-06-04 16:02:57,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5528, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5716, PETRI_PLACES=329, PETRI_TRANSITIONS=427} [2024-06-04 16:02:57,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-04 16:02:57,967 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 427 transitions, 5716 flow [2024-06-04 16:02:57,967 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) [2024-06-04 16:02:57,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:57,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:57,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 16:02:57,967 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)] === [2024-06-04 16:02:57,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:57,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1173250632, now seen corresponding path program 6 times [2024-06-04 16:02:57,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:57,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601694429] [2024-06-04 16:02:57,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:57,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:58,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:58,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601694429] [2024-06-04 16:02:58,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601694429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:58,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:58,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:58,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959819886] [2024-06-04 16:02:58,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:58,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:58,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:58,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:58,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:58,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:58,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 427 transitions, 5716 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) [2024-06-04 16:02:58,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:58,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:58,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:59,187 INFO L124 PetriNetUnfolderBase]: 2668/4511 cut-off events. [2024-06-04 16:02:59,187 INFO L125 PetriNetUnfolderBase]: For 487736/487736 co-relation queries the response was YES. [2024-06-04 16:02:59,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34659 conditions, 4511 events. 2668/4511 cut-off events. For 487736/487736 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 29281 event pairs, 507 based on Foata normal form. 16/4524 useless extension candidates. Maximal degree in co-relation 34510. Up to 3778 conditions per place. [2024-06-04 16:02:59,250 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 330 selfloop transitions, 124 changer transitions 0/461 dead transitions. [2024-06-04 16:02:59,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 461 transitions, 6788 flow [2024-06-04 16:02:59,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:59,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:59,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-04 16:02:59,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:02:59,251 INFO L175 Difference]: Start difference. First operand has 329 places, 427 transitions, 5716 flow. Second operand 9 states and 216 transitions. [2024-06-04 16:02:59,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 461 transitions, 6788 flow [2024-06-04 16:03:00,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 461 transitions, 6720 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-04 16:03:00,838 INFO L231 Difference]: Finished difference. Result has 334 places, 429 transitions, 5972 flow [2024-06-04 16:03:00,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5648, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5972, PETRI_PLACES=334, PETRI_TRANSITIONS=429} [2024-06-04 16:03:00,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-04 16:03:00,839 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 429 transitions, 5972 flow [2024-06-04 16:03:00,839 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) [2024-06-04 16:03:00,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:00,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:00,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 16:03:00,839 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)] === [2024-06-04 16:03:00,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:00,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1173102762, now seen corresponding path program 7 times [2024-06-04 16:03:00,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:00,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150478997] [2024-06-04 16:03:00,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:00,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:01,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:01,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150478997] [2024-06-04 16:03:01,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150478997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:01,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:01,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:01,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774531082] [2024-06-04 16:03:01,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:01,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:01,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:01,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:01,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:01,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:01,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 429 transitions, 5972 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) [2024-06-04 16:03:01,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:01,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:01,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:01,968 INFO L124 PetriNetUnfolderBase]: 2721/4607 cut-off events. [2024-06-04 16:03:01,968 INFO L125 PetriNetUnfolderBase]: For 493528/493528 co-relation queries the response was YES. [2024-06-04 16:03:02,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35863 conditions, 4607 events. 2721/4607 cut-off events. For 493528/493528 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 29983 event pairs, 438 based on Foata normal form. 12/4616 useless extension candidates. Maximal degree in co-relation 35712. Up to 3469 conditions per place. [2024-06-04 16:03:02,036 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 322 selfloop transitions, 141 changer transitions 0/470 dead transitions. [2024-06-04 16:03:02,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 470 transitions, 7258 flow [2024-06-04 16:03:02,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:02,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:02,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-04 16:03:02,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58994708994709 [2024-06-04 16:03:02,037 INFO L175 Difference]: Start difference. First operand has 334 places, 429 transitions, 5972 flow. Second operand 9 states and 223 transitions. [2024-06-04 16:03:02,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 470 transitions, 7258 flow [2024-06-04 16:03:03,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 470 transitions, 6984 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:03,908 INFO L231 Difference]: Finished difference. Result has 336 places, 431 transitions, 6050 flow [2024-06-04 16:03:03,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5698, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6050, PETRI_PLACES=336, PETRI_TRANSITIONS=431} [2024-06-04 16:03:03,909 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-04 16:03:03,909 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 431 transitions, 6050 flow [2024-06-04 16:03:03,909 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) [2024-06-04 16:03:03,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:03,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:03,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 16:03:03,909 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)] === [2024-06-04 16:03:03,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:03,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1178828214, now seen corresponding path program 2 times [2024-06-04 16:03:03,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:03,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506599281] [2024-06-04 16:03:03,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:03,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:04,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:04,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506599281] [2024-06-04 16:03:04,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506599281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:04,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:04,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:04,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856900636] [2024-06-04 16:03:04,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:04,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:04,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:04,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:04,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:04,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:04,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 431 transitions, 6050 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) [2024-06-04 16:03:04,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:04,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:04,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:05,057 INFO L124 PetriNetUnfolderBase]: 2903/4914 cut-off events. [2024-06-04 16:03:05,058 INFO L125 PetriNetUnfolderBase]: For 544308/544308 co-relation queries the response was YES. [2024-06-04 16:03:05,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38923 conditions, 4914 events. 2903/4914 cut-off events. For 544308/544308 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 32449 event pairs, 544 based on Foata normal form. 12/4923 useless extension candidates. Maximal degree in co-relation 38771. Up to 3995 conditions per place. [2024-06-04 16:03:05,123 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 412 selfloop transitions, 49 changer transitions 0/468 dead transitions. [2024-06-04 16:03:05,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 468 transitions, 7522 flow [2024-06-04 16:03:05,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:05,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:05,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-04 16:03:05,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-04 16:03:05,124 INFO L175 Difference]: Start difference. First operand has 336 places, 431 transitions, 6050 flow. Second operand 8 states and 183 transitions. [2024-06-04 16:03:05,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 468 transitions, 7522 flow [2024-06-04 16:03:07,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 468 transitions, 7301 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:07,273 INFO L231 Difference]: Finished difference. Result has 341 places, 442 transitions, 6229 flow [2024-06-04 16:03:07,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5841, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6229, PETRI_PLACES=341, PETRI_TRANSITIONS=442} [2024-06-04 16:03:07,273 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-04 16:03:07,274 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 442 transitions, 6229 flow [2024-06-04 16:03:07,274 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) [2024-06-04 16:03:07,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:07,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:07,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 16:03:07,274 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)] === [2024-06-04 16:03:07,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:07,274 INFO L85 PathProgramCache]: Analyzing trace with hash -89670218, now seen corresponding path program 3 times [2024-06-04 16:03:07,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:07,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896934225] [2024-06-04 16:03:07,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:07,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:07,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:07,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896934225] [2024-06-04 16:03:07,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896934225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:07,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:07,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:07,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923306180] [2024-06-04 16:03:07,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:07,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:07,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:07,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:07,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:07,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:07,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 442 transitions, 6229 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) [2024-06-04 16:03:07,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:07,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:07,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:08,514 INFO L124 PetriNetUnfolderBase]: 3022/5102 cut-off events. [2024-06-04 16:03:08,515 INFO L125 PetriNetUnfolderBase]: For 594355/594355 co-relation queries the response was YES. [2024-06-04 16:03:08,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41565 conditions, 5102 events. 3022/5102 cut-off events. For 594355/594355 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 33818 event pairs, 457 based on Foata normal form. 12/5111 useless extension candidates. Maximal degree in co-relation 41409. Up to 3723 conditions per place. [2024-06-04 16:03:08,585 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 372 selfloop transitions, 103 changer transitions 0/482 dead transitions. [2024-06-04 16:03:08,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 482 transitions, 7593 flow [2024-06-04 16:03:08,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:08,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:08,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-04 16:03:08,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-04 16:03:08,587 INFO L175 Difference]: Start difference. First operand has 341 places, 442 transitions, 6229 flow. Second operand 8 states and 201 transitions. [2024-06-04 16:03:08,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 482 transitions, 7593 flow [2024-06-04 16:03:11,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 482 transitions, 7499 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-04 16:03:11,132 INFO L231 Difference]: Finished difference. Result has 347 places, 447 transitions, 6535 flow [2024-06-04 16:03:11,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6145, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6535, PETRI_PLACES=347, PETRI_TRANSITIONS=447} [2024-06-04 16:03:11,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-04 16:03:11,133 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 447 transitions, 6535 flow [2024-06-04 16:03:11,133 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) [2024-06-04 16:03:11,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:11,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:11,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 16:03:11,133 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)] === [2024-06-04 16:03:11,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:11,134 INFO L85 PathProgramCache]: Analyzing trace with hash -80473448, now seen corresponding path program 4 times [2024-06-04 16:03:11,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:11,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514925186] [2024-06-04 16:03:11,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:11,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:11,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:11,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514925186] [2024-06-04 16:03:11,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514925186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:11,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:11,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:11,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978814337] [2024-06-04 16:03:11,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:11,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:11,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:11,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:11,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:11,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:11,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 447 transitions, 6535 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) [2024-06-04 16:03:11,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:11,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:11,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:12,497 INFO L124 PetriNetUnfolderBase]: 3082/5225 cut-off events. [2024-06-04 16:03:12,497 INFO L125 PetriNetUnfolderBase]: For 597302/597305 co-relation queries the response was YES. [2024-06-04 16:03:12,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43093 conditions, 5225 events. 3082/5225 cut-off events. For 597302/597305 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 34981 event pairs, 484 based on Foata normal form. 14/5235 useless extension candidates. Maximal degree in co-relation 42934. Up to 3670 conditions per place. [2024-06-04 16:03:12,560 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 381 selfloop transitions, 97 changer transitions 0/485 dead transitions. [2024-06-04 16:03:12,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 485 transitions, 8083 flow [2024-06-04 16:03:12,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:12,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:12,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-04 16:03:12,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-04 16:03:12,562 INFO L175 Difference]: Start difference. First operand has 347 places, 447 transitions, 6535 flow. Second operand 7 states and 180 transitions. [2024-06-04 16:03:12,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 485 transitions, 8083 flow [2024-06-04 16:03:15,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 485 transitions, 7926 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-04 16:03:15,230 INFO L231 Difference]: Finished difference. Result has 352 places, 453 transitions, 6771 flow [2024-06-04 16:03:15,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6390, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6771, PETRI_PLACES=352, PETRI_TRANSITIONS=453} [2024-06-04 16:03:15,230 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-04 16:03:15,230 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 453 transitions, 6771 flow [2024-06-04 16:03:15,231 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) [2024-06-04 16:03:15,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:15,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:15,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 16:03:15,231 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)] === [2024-06-04 16:03:15,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:15,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1377358358, now seen corresponding path program 1 times [2024-06-04 16:03:15,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:15,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764872307] [2024-06-04 16:03:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:15,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:15,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:15,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:15,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764872307] [2024-06-04 16:03:15,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764872307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:15,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:15,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:15,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146197177] [2024-06-04 16:03:15,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:15,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:15,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:15,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:15,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:15,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:15,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 453 transitions, 6771 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) [2024-06-04 16:03:15,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:15,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:15,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:16,490 INFO L124 PetriNetUnfolderBase]: 3087/5230 cut-off events. [2024-06-04 16:03:16,491 INFO L125 PetriNetUnfolderBase]: For 561230/561230 co-relation queries the response was YES. [2024-06-04 16:03:16,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43716 conditions, 5230 events. 3087/5230 cut-off events. For 561230/561230 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 35153 event pairs, 645 based on Foata normal form. 1/5222 useless extension candidates. Maximal degree in co-relation 43553. Up to 4562 conditions per place. [2024-06-04 16:03:16,569 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 367 selfloop transitions, 99 changer transitions 0/473 dead transitions. [2024-06-04 16:03:16,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 473 transitions, 7951 flow [2024-06-04 16:03:16,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:03:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:03:16,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-04 16:03:16,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 16:03:16,571 INFO L175 Difference]: Start difference. First operand has 352 places, 453 transitions, 6771 flow. Second operand 6 states and 150 transitions. [2024-06-04 16:03:16,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 473 transitions, 7951 flow [2024-06-04 16:03:19,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 473 transitions, 7810 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-04 16:03:19,244 INFO L231 Difference]: Finished difference. Result has 356 places, 456 transitions, 6873 flow [2024-06-04 16:03:19,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6630, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6873, PETRI_PLACES=356, PETRI_TRANSITIONS=456} [2024-06-04 16:03:19,244 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-04 16:03:19,244 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 456 transitions, 6873 flow [2024-06-04 16:03:19,245 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) [2024-06-04 16:03:19,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:19,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:19,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 16:03:19,245 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)] === [2024-06-04 16:03:19,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:19,245 INFO L85 PathProgramCache]: Analyzing trace with hash 942885254, now seen corresponding path program 1 times [2024-06-04 16:03:19,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:19,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190746707] [2024-06-04 16:03:19,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:19,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:19,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:19,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:19,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190746707] [2024-06-04 16:03:19,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190746707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:19,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:19,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:19,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351703858] [2024-06-04 16:03:19,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:19,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:19,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:19,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:19,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:19,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:19,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 456 transitions, 6873 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) [2024-06-04 16:03:19,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:19,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:19,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:20,606 INFO L124 PetriNetUnfolderBase]: 3100/5248 cut-off events. [2024-06-04 16:03:20,607 INFO L125 PetriNetUnfolderBase]: For 578684/578684 co-relation queries the response was YES. [2024-06-04 16:03:20,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43972 conditions, 5248 events. 3100/5248 cut-off events. For 578684/578684 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 35176 event pairs, 617 based on Foata normal form. 1/5246 useless extension candidates. Maximal degree in co-relation 43807. Up to 4685 conditions per place. [2024-06-04 16:03:20,687 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 426 selfloop transitions, 57 changer transitions 0/490 dead transitions. [2024-06-04 16:03:20,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 490 transitions, 8203 flow [2024-06-04 16:03:20,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:20,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:20,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 16:03:20,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-04 16:03:20,688 INFO L175 Difference]: Start difference. First operand has 356 places, 456 transitions, 6873 flow. Second operand 8 states and 191 transitions. [2024-06-04 16:03:20,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 490 transitions, 8203 flow [2024-06-04 16:03:23,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 490 transitions, 7978 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:23,675 INFO L231 Difference]: Finished difference. Result has 359 places, 462 transitions, 6896 flow [2024-06-04 16:03:23,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6650, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6896, PETRI_PLACES=359, PETRI_TRANSITIONS=462} [2024-06-04 16:03:23,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-04 16:03:23,676 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 462 transitions, 6896 flow [2024-06-04 16:03:23,676 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) [2024-06-04 16:03:23,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:23,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:23,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 16:03:23,676 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)] === [2024-06-04 16:03:23,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:23,677 INFO L85 PathProgramCache]: Analyzing trace with hash -452439130, now seen corresponding path program 2 times [2024-06-04 16:03:23,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:23,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618221804] [2024-06-04 16:03:23,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:23,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:23,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:23,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618221804] [2024-06-04 16:03:23,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618221804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:23,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:23,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:23,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130369136] [2024-06-04 16:03:23,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:23,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:23,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:23,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:23,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:24,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:24,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 462 transitions, 6896 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:24,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:24,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:24,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:25,057 INFO L124 PetriNetUnfolderBase]: 3105/5259 cut-off events. [2024-06-04 16:03:25,058 INFO L125 PetriNetUnfolderBase]: For 580646/580646 co-relation queries the response was YES. [2024-06-04 16:03:25,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44144 conditions, 5259 events. 3105/5259 cut-off events. For 580646/580646 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 35297 event pairs, 616 based on Foata normal form. 1/5257 useless extension candidates. Maximal degree in co-relation 43980. Up to 4709 conditions per place. [2024-06-04 16:03:25,132 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 429 selfloop transitions, 49 changer transitions 0/485 dead transitions. [2024-06-04 16:03:25,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 485 transitions, 7933 flow [2024-06-04 16:03:25,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:25,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-04 16:03:25,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-04 16:03:25,134 INFO L175 Difference]: Start difference. First operand has 359 places, 462 transitions, 6896 flow. Second operand 7 states and 165 transitions. [2024-06-04 16:03:25,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 485 transitions, 7933 flow [2024-06-04 16:03:27,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 485 transitions, 7691 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:27,641 INFO L231 Difference]: Finished difference. Result has 359 places, 465 transitions, 6799 flow [2024-06-04 16:03:27,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6654, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6799, PETRI_PLACES=359, PETRI_TRANSITIONS=465} [2024-06-04 16:03:27,642 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-04 16:03:27,642 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 465 transitions, 6799 flow [2024-06-04 16:03:27,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:27,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:27,642 INFO 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] [2024-06-04 16:03:27,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 16:03:27,642 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)] === [2024-06-04 16:03:27,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:27,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1036341178, now seen corresponding path program 2 times [2024-06-04 16:03:27,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:27,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845527865] [2024-06-04 16:03:27,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:27,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:27,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:27,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845527865] [2024-06-04 16:03:27,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845527865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:27,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:27,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:27,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182496532] [2024-06-04 16:03:27,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:27,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:27,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:27,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:27,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:27,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:27,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 465 transitions, 6799 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:27,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:27,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:27,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:29,084 INFO L124 PetriNetUnfolderBase]: 3118/5277 cut-off events. [2024-06-04 16:03:29,084 INFO L125 PetriNetUnfolderBase]: For 595909/595909 co-relation queries the response was YES. [2024-06-04 16:03:29,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44445 conditions, 5277 events. 3118/5277 cut-off events. For 595909/595909 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 35340 event pairs, 617 based on Foata normal form. 1/5275 useless extension candidates. Maximal degree in co-relation 44282. Up to 4671 conditions per place. [2024-06-04 16:03:29,151 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 401 selfloop transitions, 87 changer transitions 0/495 dead transitions. [2024-06-04 16:03:29,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 495 transitions, 8289 flow [2024-06-04 16:03:29,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:29,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:29,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-04 16:03:29,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582010582010583 [2024-06-04 16:03:29,152 INFO L175 Difference]: Start difference. First operand has 359 places, 465 transitions, 6799 flow. Second operand 9 states and 211 transitions. [2024-06-04 16:03:29,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 495 transitions, 8289 flow [2024-06-04 16:03:32,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 495 transitions, 8173 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 16:03:32,104 INFO L231 Difference]: Finished difference. Result has 362 places, 471 transitions, 6975 flow [2024-06-04 16:03:32,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6687, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6975, PETRI_PLACES=362, PETRI_TRANSITIONS=471} [2024-06-04 16:03:32,108 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-04 16:03:32,108 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 471 transitions, 6975 flow [2024-06-04 16:03:32,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:32,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:32,108 INFO 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] [2024-06-04 16:03:32,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 16:03:32,108 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)] === [2024-06-04 16:03:32,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:32,109 INFO L85 PathProgramCache]: Analyzing trace with hash -447797500, now seen corresponding path program 3 times [2024-06-04 16:03:32,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:32,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644804155] [2024-06-04 16:03:32,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:32,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:32,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:32,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644804155] [2024-06-04 16:03:32,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644804155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:32,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:32,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:32,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537805438] [2024-06-04 16:03:32,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:32,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:32,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:32,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:32,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:32,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:32,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 471 transitions, 6975 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:32,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:32,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:32,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:33,412 INFO L124 PetriNetUnfolderBase]: 3115/5273 cut-off events. [2024-06-04 16:03:33,412 INFO L125 PetriNetUnfolderBase]: For 592255/592255 co-relation queries the response was YES. [2024-06-04 16:03:33,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44411 conditions, 5273 events. 3115/5273 cut-off events. For 592255/592255 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 35363 event pairs, 616 based on Foata normal form. 1/5271 useless extension candidates. Maximal degree in co-relation 44248. Up to 4717 conditions per place. [2024-06-04 16:03:33,489 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 430 selfloop transitions, 57 changer transitions 0/494 dead transitions. [2024-06-04 16:03:33,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 494 transitions, 8005 flow [2024-06-04 16:03:33,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:33,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:33,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-04 16:03:33,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-04 16:03:33,490 INFO L175 Difference]: Start difference. First operand has 362 places, 471 transitions, 6975 flow. Second operand 10 states and 222 transitions. [2024-06-04 16:03:33,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 494 transitions, 8005 flow [2024-06-04 16:03:36,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 494 transitions, 7830 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 16:03:36,321 INFO L231 Difference]: Finished difference. Result has 366 places, 471 transitions, 6924 flow [2024-06-04 16:03:36,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6800, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6924, PETRI_PLACES=366, PETRI_TRANSITIONS=471} [2024-06-04 16:03:36,321 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-04 16:03:36,322 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 471 transitions, 6924 flow [2024-06-04 16:03:36,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:36,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:36,323 INFO 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] [2024-06-04 16:03:36,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 16:03:36,323 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)] === [2024-06-04 16:03:36,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:36,323 INFO L85 PathProgramCache]: Analyzing trace with hash -132354280, now seen corresponding path program 3 times [2024-06-04 16:03:36,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:36,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529595237] [2024-06-04 16:03:36,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:36,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:36,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:36,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529595237] [2024-06-04 16:03:36,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529595237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:36,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:36,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:36,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792518059] [2024-06-04 16:03:36,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:36,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:36,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:36,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:36,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:36,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:36,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 471 transitions, 6924 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:36,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:36,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:36,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:37,634 INFO L124 PetriNetUnfolderBase]: 3112/5269 cut-off events. [2024-06-04 16:03:37,635 INFO L125 PetriNetUnfolderBase]: For 588024/588024 co-relation queries the response was YES. [2024-06-04 16:03:37,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44214 conditions, 5269 events. 3112/5269 cut-off events. For 588024/588024 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 35307 event pairs, 617 based on Foata normal form. 1/5267 useless extension candidates. Maximal degree in co-relation 44051. Up to 4664 conditions per place. [2024-06-04 16:03:37,715 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 397 selfloop transitions, 91 changer transitions 0/495 dead transitions. [2024-06-04 16:03:37,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 495 transitions, 8134 flow [2024-06-04 16:03:37,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:37,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:37,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-04 16:03:37,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380952380952381 [2024-06-04 16:03:37,716 INFO L175 Difference]: Start difference. First operand has 366 places, 471 transitions, 6924 flow. Second operand 10 states and 226 transitions. [2024-06-04 16:03:37,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 495 transitions, 8134 flow [2024-06-04 16:03:40,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 495 transitions, 7974 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-04 16:03:40,578 INFO L231 Difference]: Finished difference. Result has 367 places, 471 transitions, 6958 flow [2024-06-04 16:03:40,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6766, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6958, PETRI_PLACES=367, PETRI_TRANSITIONS=471} [2024-06-04 16:03:40,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-04 16:03:40,579 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 471 transitions, 6958 flow [2024-06-04 16:03:40,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:40,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:40,580 INFO 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] [2024-06-04 16:03:40,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 16:03:40,580 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)] === [2024-06-04 16:03:40,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:40,580 INFO L85 PathProgramCache]: Analyzing trace with hash 155006860, now seen corresponding path program 4 times [2024-06-04 16:03:40,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:40,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893817293] [2024-06-04 16:03:40,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:40,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:40,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:40,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:40,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893817293] [2024-06-04 16:03:40,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893817293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:40,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:40,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:40,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643659479] [2024-06-04 16:03:40,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:40,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:40,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:40,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:40,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:40,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:40,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 471 transitions, 6958 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) [2024-06-04 16:03:40,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:40,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:40,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:42,044 INFO L124 PetriNetUnfolderBase]: 3141/5310 cut-off events. [2024-06-04 16:03:42,045 INFO L125 PetriNetUnfolderBase]: For 600510/600510 co-relation queries the response was YES. [2024-06-04 16:03:42,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44772 conditions, 5310 events. 3141/5310 cut-off events. For 600510/600510 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 35705 event pairs, 625 based on Foata normal form. 1/5305 useless extension candidates. Maximal degree in co-relation 44609. Up to 4502 conditions per place. [2024-06-04 16:03:42,121 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 349 selfloop transitions, 165 changer transitions 0/521 dead transitions. [2024-06-04 16:03:42,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 521 transitions, 8755 flow [2024-06-04 16:03:42,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:42,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:42,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-04 16:03:42,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569047619047619 [2024-06-04 16:03:42,122 INFO L175 Difference]: Start difference. First operand has 367 places, 471 transitions, 6958 flow. Second operand 10 states and 239 transitions. [2024-06-04 16:03:42,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 521 transitions, 8755 flow [2024-06-04 16:03:44,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 521 transitions, 8582 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-04 16:03:44,561 INFO L231 Difference]: Finished difference. Result has 368 places, 483 transitions, 7274 flow [2024-06-04 16:03:44,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6791, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7274, PETRI_PLACES=368, PETRI_TRANSITIONS=483} [2024-06-04 16:03:44,561 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-04 16:03:44,562 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 483 transitions, 7274 flow [2024-06-04 16:03:44,562 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) [2024-06-04 16:03:44,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:44,562 INFO 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] [2024-06-04 16:03:44,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 16:03:44,562 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)] === [2024-06-04 16:03:44,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:44,562 INFO L85 PathProgramCache]: Analyzing trace with hash -985730804, now seen corresponding path program 5 times [2024-06-04 16:03:44,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:44,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178764742] [2024-06-04 16:03:44,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:44,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:44,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:44,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178764742] [2024-06-04 16:03:44,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178764742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:44,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:44,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:44,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119621027] [2024-06-04 16:03:44,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:44,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:44,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:44,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:44,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:44,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:44,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 483 transitions, 7274 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) [2024-06-04 16:03:44,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:44,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:44,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:45,856 INFO L124 PetriNetUnfolderBase]: 3146/5319 cut-off events. [2024-06-04 16:03:45,856 INFO L125 PetriNetUnfolderBase]: For 601774/601774 co-relation queries the response was YES. [2024-06-04 16:03:45,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45108 conditions, 5319 events. 3146/5319 cut-off events. For 601774/601774 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 35743 event pairs, 625 based on Foata normal form. 1/5314 useless extension candidates. Maximal degree in co-relation 44945. Up to 4508 conditions per place. [2024-06-04 16:03:45,933 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 364 selfloop transitions, 149 changer transitions 0/520 dead transitions. [2024-06-04 16:03:45,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 520 transitions, 8949 flow [2024-06-04 16:03:45,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:45,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:45,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-04 16:03:45,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-04 16:03:45,935 INFO L175 Difference]: Start difference. First operand has 368 places, 483 transitions, 7274 flow. Second operand 9 states and 217 transitions. [2024-06-04 16:03:45,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 520 transitions, 8949 flow [2024-06-04 16:03:48,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 520 transitions, 8599 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:48,739 INFO L231 Difference]: Finished difference. Result has 370 places, 486 transitions, 7265 flow [2024-06-04 16:03:48,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6930, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7265, PETRI_PLACES=370, PETRI_TRANSITIONS=486} [2024-06-04 16:03:48,740 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-04 16:03:48,740 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 486 transitions, 7265 flow [2024-06-04 16:03:48,740 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) [2024-06-04 16:03:48,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:48,740 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] [2024-06-04 16:03:48,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 16:03:48,740 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)] === [2024-06-04 16:03:48,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:48,741 INFO L85 PathProgramCache]: Analyzing trace with hash -786130484, now seen corresponding path program 6 times [2024-06-04 16:03:48,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:48,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946287021] [2024-06-04 16:03:48,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:48,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:48,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:48,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946287021] [2024-06-04 16:03:48,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946287021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:48,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:48,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:48,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393972694] [2024-06-04 16:03:48,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:48,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:48,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:48,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:48,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:49,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:49,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 486 transitions, 7265 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) [2024-06-04 16:03:49,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:49,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:49,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:50,026 INFO L124 PetriNetUnfolderBase]: 3151/5328 cut-off events. [2024-06-04 16:03:50,026 INFO L125 PetriNetUnfolderBase]: For 614372/614372 co-relation queries the response was YES. [2024-06-04 16:03:50,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45233 conditions, 5328 events. 3151/5328 cut-off events. For 614372/614372 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 35801 event pairs, 625 based on Foata normal form. 1/5323 useless extension candidates. Maximal degree in co-relation 45069. Up to 4514 conditions per place. [2024-06-04 16:03:50,109 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 343 selfloop transitions, 174 changer transitions 0/524 dead transitions. [2024-06-04 16:03:50,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 524 transitions, 8778 flow [2024-06-04 16:03:50,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:03:50,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:03:50,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-04 16:03:50,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:03:50,110 INFO L175 Difference]: Start difference. First operand has 370 places, 486 transitions, 7265 flow. Second operand 11 states and 253 transitions. [2024-06-04 16:03:50,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 524 transitions, 8778 flow [2024-06-04 16:03:53,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 524 transitions, 8452 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 16:03:53,103 INFO L231 Difference]: Finished difference. Result has 375 places, 489 transitions, 7330 flow [2024-06-04 16:03:53,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6948, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7330, PETRI_PLACES=375, PETRI_TRANSITIONS=489} [2024-06-04 16:03:53,104 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-04 16:03:53,104 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 489 transitions, 7330 flow [2024-06-04 16:03:53,104 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) [2024-06-04 16:03:53,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:53,104 INFO 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] [2024-06-04 16:03:53,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 16:03:53,105 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)] === [2024-06-04 16:03:53,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:53,105 INFO L85 PathProgramCache]: Analyzing trace with hash -985610648, now seen corresponding path program 4 times [2024-06-04 16:03:53,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:53,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985977673] [2024-06-04 16:03:53,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:53,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:53,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:53,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985977673] [2024-06-04 16:03:53,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985977673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:53,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:53,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:53,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79334266] [2024-06-04 16:03:53,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:53,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:53,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:53,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:53,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:53,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:53,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 489 transitions, 7330 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:53,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:53,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:53,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:54,444 INFO L124 PetriNetUnfolderBase]: 3172/5358 cut-off events. [2024-06-04 16:03:54,445 INFO L125 PetriNetUnfolderBase]: For 636114/636117 co-relation queries the response was YES. [2024-06-04 16:03:54,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45874 conditions, 5358 events. 3172/5358 cut-off events. For 636114/636117 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 35997 event pairs, 666 based on Foata normal form. 1/5345 useless extension candidates. Maximal degree in co-relation 45709. Up to 4363 conditions per place. [2024-06-04 16:03:54,525 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 264 selfloop transitions, 266 changer transitions 0/537 dead transitions. [2024-06-04 16:03:54,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 537 transitions, 9236 flow [2024-06-04 16:03:54,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:54,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:54,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-04 16:03:54,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-04 16:03:54,527 INFO L175 Difference]: Start difference. First operand has 375 places, 489 transitions, 7330 flow. Second operand 10 states and 246 transitions. [2024-06-04 16:03:54,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 537 transitions, 9236 flow [2024-06-04 16:03:57,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 537 transitions, 8944 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:57,826 INFO L231 Difference]: Finished difference. Result has 379 places, 499 transitions, 7861 flow [2024-06-04 16:03:57,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7038, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7861, PETRI_PLACES=379, PETRI_TRANSITIONS=499} [2024-06-04 16:03:57,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-04 16:03:57,826 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 499 transitions, 7861 flow [2024-06-04 16:03:57,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:57,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:57,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:57,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 16:03:57,827 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)] === [2024-06-04 16:03:57,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:57,827 INFO L85 PathProgramCache]: Analyzing trace with hash -333534298, now seen corresponding path program 7 times [2024-06-04 16:03:57,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:57,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264548247] [2024-06-04 16:03:57,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:57,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:58,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:58,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264548247] [2024-06-04 16:03:58,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264548247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:58,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:58,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:58,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370809199] [2024-06-04 16:03:58,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:58,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:58,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:58,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:58,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:58,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:58,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 499 transitions, 7861 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:58,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:58,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:58,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:59,209 INFO L124 PetriNetUnfolderBase]: 3177/5371 cut-off events. [2024-06-04 16:03:59,209 INFO L125 PetriNetUnfolderBase]: For 654331/654334 co-relation queries the response was YES. [2024-06-04 16:03:59,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47024 conditions, 5371 events. 3177/5371 cut-off events. For 654331/654334 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 36146 event pairs, 639 based on Foata normal form. 1/5362 useless extension candidates. Maximal degree in co-relation 46857. Up to 4549 conditions per place. [2024-06-04 16:03:59,291 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 362 selfloop transitions, 174 changer transitions 0/543 dead transitions. [2024-06-04 16:03:59,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 543 transitions, 9433 flow [2024-06-04 16:03:59,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:03:59,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:03:59,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 261 transitions. [2024-06-04 16:03:59,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564935064935065 [2024-06-04 16:03:59,292 INFO L175 Difference]: Start difference. First operand has 379 places, 499 transitions, 7861 flow. Second operand 11 states and 261 transitions. [2024-06-04 16:03:59,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 543 transitions, 9433 flow [2024-06-04 16:04:02,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 543 transitions, 8973 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-04 16:04:02,407 INFO L231 Difference]: Finished difference. Result has 384 places, 502 transitions, 7789 flow [2024-06-04 16:04:02,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7401, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7789, PETRI_PLACES=384, PETRI_TRANSITIONS=502} [2024-06-04 16:04:02,408 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-04 16:04:02,408 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 502 transitions, 7789 flow [2024-06-04 16:04:02,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:02,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:02,408 INFO 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] [2024-06-04 16:04:02,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 16:04:02,408 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)] === [2024-06-04 16:04:02,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:02,409 INFO L85 PathProgramCache]: Analyzing trace with hash 280566160, now seen corresponding path program 8 times [2024-06-04 16:04:02,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:02,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811727806] [2024-06-04 16:04:02,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:02,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:02,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:02,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811727806] [2024-06-04 16:04:02,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811727806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:02,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:02,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:02,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001887967] [2024-06-04 16:04:02,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:02,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:02,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:02,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:02,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:02,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:02,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 502 transitions, 7789 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:02,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:02,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:02,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:03,790 INFO L124 PetriNetUnfolderBase]: 3190/5394 cut-off events. [2024-06-04 16:04:03,791 INFO L125 PetriNetUnfolderBase]: For 667923/667926 co-relation queries the response was YES. [2024-06-04 16:04:03,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47054 conditions, 5394 events. 3190/5394 cut-off events. For 667923/667926 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 36350 event pairs, 638 based on Foata normal form. 1/5386 useless extension candidates. Maximal degree in co-relation 46886. Up to 4564 conditions per place. [2024-06-04 16:04:03,870 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 362 selfloop transitions, 182 changer transitions 0/551 dead transitions. [2024-06-04 16:04:03,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 551 transitions, 9610 flow [2024-06-04 16:04:03,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-04 16:04:03,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-04 16:04:03,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 330 transitions. [2024-06-04 16:04:03,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-04 16:04:03,872 INFO L175 Difference]: Start difference. First operand has 384 places, 502 transitions, 7789 flow. Second operand 15 states and 330 transitions. [2024-06-04 16:04:03,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 551 transitions, 9610 flow [2024-06-04 16:04:06,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 551 transitions, 9309 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-04 16:04:06,515 INFO L231 Difference]: Finished difference. Result has 391 places, 508 transitions, 7935 flow [2024-06-04 16:04:06,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7494, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7935, PETRI_PLACES=391, PETRI_TRANSITIONS=508} [2024-06-04 16:04:06,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-04 16:04:06,516 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 508 transitions, 7935 flow [2024-06-04 16:04:06,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:06,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:06,516 INFO 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] [2024-06-04 16:04:06,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 16:04:06,517 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)] === [2024-06-04 16:04:06,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:06,517 INFO L85 PathProgramCache]: Analyzing trace with hash 280773550, now seen corresponding path program 9 times [2024-06-04 16:04:06,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:06,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477332697] [2024-06-04 16:04:06,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:06,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:06,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:06,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477332697] [2024-06-04 16:04:06,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477332697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:06,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:06,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:06,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581573330] [2024-06-04 16:04:06,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:06,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:06,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:06,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:06,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:06,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:06,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 508 transitions, 7935 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:06,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:06,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:06,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:07,957 INFO L124 PetriNetUnfolderBase]: 3187/5390 cut-off events. [2024-06-04 16:04:07,957 INFO L125 PetriNetUnfolderBase]: For 677376/677379 co-relation queries the response was YES. [2024-06-04 16:04:08,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47132 conditions, 5390 events. 3187/5390 cut-off events. For 677376/677379 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 36332 event pairs, 638 based on Foata normal form. 1/5382 useless extension candidates. Maximal degree in co-relation 46963. Up to 4561 conditions per place. [2024-06-04 16:04:08,041 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 359 selfloop transitions, 182 changer transitions 0/548 dead transitions. [2024-06-04 16:04:08,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 548 transitions, 9487 flow [2024-06-04 16:04:08,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:04:08,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:04:08,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 293 transitions. [2024-06-04 16:04:08,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366300366300366 [2024-06-04 16:04:08,042 INFO L175 Difference]: Start difference. First operand has 391 places, 508 transitions, 7935 flow. Second operand 13 states and 293 transitions. [2024-06-04 16:04:08,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 548 transitions, 9487 flow [2024-06-04 16:04:11,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 548 transitions, 9166 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-04 16:04:11,176 INFO L231 Difference]: Finished difference. Result has 394 places, 508 transitions, 7984 flow [2024-06-04 16:04:11,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7614, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7984, PETRI_PLACES=394, PETRI_TRANSITIONS=508} [2024-06-04 16:04:11,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-04 16:04:11,176 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 508 transitions, 7984 flow [2024-06-04 16:04:11,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:11,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:11,177 INFO 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] [2024-06-04 16:04:11,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 16:04:11,177 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)] === [2024-06-04 16:04:11,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:11,177 INFO L85 PathProgramCache]: Analyzing trace with hash -8792992, now seen corresponding path program 5 times [2024-06-04 16:04:11,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:11,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785966919] [2024-06-04 16:04:11,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:11,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:11,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:11,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785966919] [2024-06-04 16:04:11,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785966919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:11,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:11,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:11,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106192830] [2024-06-04 16:04:11,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:11,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:11,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:11,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:11,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:11,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:11,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 508 transitions, 7984 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:11,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:11,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:11,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:12,594 INFO L124 PetriNetUnfolderBase]: 3200/5407 cut-off events. [2024-06-04 16:04:12,595 INFO L125 PetriNetUnfolderBase]: For 696044/696047 co-relation queries the response was YES. [2024-06-04 16:04:12,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47543 conditions, 5407 events. 3200/5407 cut-off events. For 696044/696047 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 36403 event pairs, 664 based on Foata normal form. 1/5394 useless extension candidates. Maximal degree in co-relation 47373. Up to 4195 conditions per place. [2024-06-04 16:04:12,676 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 230 selfloop transitions, 321 changer transitions 0/558 dead transitions. [2024-06-04 16:04:12,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 558 transitions, 10088 flow [2024-06-04 16:04:12,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:04:12,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:04:12,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 286 transitions. [2024-06-04 16:04:12,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-06-04 16:04:12,678 INFO L175 Difference]: Start difference. First operand has 394 places, 508 transitions, 7984 flow. Second operand 12 states and 286 transitions. [2024-06-04 16:04:12,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 558 transitions, 10088 flow [2024-06-04 16:04:15,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 558 transitions, 9759 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-04 16:04:15,715 INFO L231 Difference]: Finished difference. Result has 396 places, 517 transitions, 8557 flow [2024-06-04 16:04:15,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7655, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8557, PETRI_PLACES=396, PETRI_TRANSITIONS=517} [2024-06-04 16:04:15,715 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-04 16:04:15,715 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 517 transitions, 8557 flow [2024-06-04 16:04:15,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:15,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:15,716 INFO 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] [2024-06-04 16:04:15,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 16:04:15,716 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)] === [2024-06-04 16:04:15,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:15,716 INFO L85 PathProgramCache]: Analyzing trace with hash 280952296, now seen corresponding path program 6 times [2024-06-04 16:04:15,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:15,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793840000] [2024-06-04 16:04:15,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:15,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:15,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:15,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793840000] [2024-06-04 16:04:15,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793840000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:15,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:15,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:15,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442940581] [2024-06-04 16:04:15,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:15,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:15,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:15,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:15,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:16,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:16,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 517 transitions, 8557 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:16,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:16,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:16,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:17,153 INFO L124 PetriNetUnfolderBase]: 3197/5415 cut-off events. [2024-06-04 16:04:17,153 INFO L125 PetriNetUnfolderBase]: For 707838/707841 co-relation queries the response was YES. [2024-06-04 16:04:17,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48610 conditions, 5415 events. 3197/5415 cut-off events. For 707838/707841 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 36571 event pairs, 674 based on Foata normal form. 1/5402 useless extension candidates. Maximal degree in co-relation 48438. Up to 4193 conditions per place. [2024-06-04 16:04:17,237 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 227 selfloop transitions, 324 changer transitions 0/558 dead transitions. [2024-06-04 16:04:17,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 558 transitions, 10329 flow [2024-06-04 16:04:17,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:04:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:04:17,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 300 transitions. [2024-06-04 16:04:17,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5494505494505495 [2024-06-04 16:04:17,238 INFO L175 Difference]: Start difference. First operand has 396 places, 517 transitions, 8557 flow. Second operand 13 states and 300 transitions. [2024-06-04 16:04:17,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 558 transitions, 10329 flow [2024-06-04 16:04:21,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 558 transitions, 9737 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-04 16:04:21,117 INFO L231 Difference]: Finished difference. Result has 402 places, 517 transitions, 8619 flow [2024-06-04 16:04:21,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7965, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8619, PETRI_PLACES=402, PETRI_TRANSITIONS=517} [2024-06-04 16:04:21,118 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-04 16:04:21,118 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 517 transitions, 8619 flow [2024-06-04 16:04:21,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:21,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:21,118 INFO 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] [2024-06-04 16:04:21,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 16:04:21,118 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)] === [2024-06-04 16:04:21,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:21,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1066447674, now seen corresponding path program 7 times [2024-06-04 16:04:21,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:21,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212072025] [2024-06-04 16:04:21,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:21,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:21,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:21,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:21,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212072025] [2024-06-04 16:04:21,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212072025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:21,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:21,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:21,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25496928] [2024-06-04 16:04:21,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:21,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:21,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:21,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:21,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:21,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:21,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 517 transitions, 8619 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:21,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:21,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:21,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:22,549 INFO L124 PetriNetUnfolderBase]: 3226/5443 cut-off events. [2024-06-04 16:04:22,549 INFO L125 PetriNetUnfolderBase]: For 740046/740049 co-relation queries the response was YES. [2024-06-04 16:04:22,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49472 conditions, 5443 events. 3226/5443 cut-off events. For 740046/740049 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 36705 event pairs, 656 based on Foata normal form. 1/5430 useless extension candidates. Maximal degree in co-relation 49299. Up to 4218 conditions per place. [2024-06-04 16:04:22,630 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 219 selfloop transitions, 336 changer transitions 0/562 dead transitions. [2024-06-04 16:04:22,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 562 transitions, 10599 flow [2024-06-04 16:04:22,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:04:22,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:04:22,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 298 transitions. [2024-06-04 16:04:22,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457875457875457 [2024-06-04 16:04:22,631 INFO L175 Difference]: Start difference. First operand has 402 places, 517 transitions, 8619 flow. Second operand 13 states and 298 transitions. [2024-06-04 16:04:22,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 562 transitions, 10599 flow [2024-06-04 16:04:26,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 562 transitions, 9992 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-04 16:04:26,824 INFO L231 Difference]: Finished difference. Result has 404 places, 527 transitions, 8900 flow [2024-06-04 16:04:26,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8028, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8900, PETRI_PLACES=404, PETRI_TRANSITIONS=527} [2024-06-04 16:04:26,825 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-04 16:04:26,825 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 527 transitions, 8900 flow [2024-06-04 16:04:26,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:26,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:26,825 INFO 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] [2024-06-04 16:04:26,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 16:04:26,826 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)] === [2024-06-04 16:04:26,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:26,826 INFO L85 PathProgramCache]: Analyzing trace with hash -2117933694, now seen corresponding path program 10 times [2024-06-04 16:04:26,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:26,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461993626] [2024-06-04 16:04:26,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:26,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:27,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:27,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461993626] [2024-06-04 16:04:27,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461993626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:27,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:27,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:27,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403059256] [2024-06-04 16:04:27,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:27,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:27,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:27,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:27,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:27,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:27,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 527 transitions, 8900 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:27,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:27,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:27,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:28,412 INFO L124 PetriNetUnfolderBase]: 3239/5492 cut-off events. [2024-06-04 16:04:28,412 INFO L125 PetriNetUnfolderBase]: For 758006/758009 co-relation queries the response was YES. [2024-06-04 16:04:28,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49940 conditions, 5492 events. 3239/5492 cut-off events. For 758006/758009 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 37311 event pairs, 646 based on Foata normal form. 1/5486 useless extension candidates. Maximal degree in co-relation 49766. Up to 4630 conditions per place. [2024-06-04 16:04:28,485 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 376 selfloop transitions, 188 changer transitions 0/571 dead transitions. [2024-06-04 16:04:28,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 571 transitions, 10987 flow [2024-06-04 16:04:28,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-04 16:04:28,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-04 16:04:28,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 327 transitions. [2024-06-04 16:04:28,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190476190476191 [2024-06-04 16:04:28,486 INFO L175 Difference]: Start difference. First operand has 404 places, 527 transitions, 8900 flow. Second operand 15 states and 327 transitions. [2024-06-04 16:04:28,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 571 transitions, 10987 flow [2024-06-04 16:04:32,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 571 transitions, 10343 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-04 16:04:32,885 INFO L231 Difference]: Finished difference. Result has 410 places, 533 transitions, 8731 flow [2024-06-04 16:04:32,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8264, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8731, PETRI_PLACES=410, PETRI_TRANSITIONS=533} [2024-06-04 16:04:32,885 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-04 16:04:32,886 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 533 transitions, 8731 flow [2024-06-04 16:04:32,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:32,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:32,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:32,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 16:04:32,886 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)] === [2024-06-04 16:04:32,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:32,886 INFO L85 PathProgramCache]: Analyzing trace with hash 31984284, now seen corresponding path program 8 times [2024-06-04 16:04:32,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:32,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362550528] [2024-06-04 16:04:32,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:32,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:33,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:33,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362550528] [2024-06-04 16:04:33,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362550528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:33,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:33,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:33,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967331885] [2024-06-04 16:04:33,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:33,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:33,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:33,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:33,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:33,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:33,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 533 transitions, 8731 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:33,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:33,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:33,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:34,333 INFO L124 PetriNetUnfolderBase]: 3244/5494 cut-off events. [2024-06-04 16:04:34,334 INFO L125 PetriNetUnfolderBase]: For 771626/771629 co-relation queries the response was YES. [2024-06-04 16:04:34,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49751 conditions, 5494 events. 3244/5494 cut-off events. For 771626/771629 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 37250 event pairs, 674 based on Foata normal form. 1/5481 useless extension candidates. Maximal degree in co-relation 49576. Up to 4232 conditions per place. [2024-06-04 16:04:34,420 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 230 selfloop transitions, 334 changer transitions 0/571 dead transitions. [2024-06-04 16:04:34,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 571 transitions, 10771 flow [2024-06-04 16:04:34,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:04:34,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:04:34,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 282 transitions. [2024-06-04 16:04:34,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:04:34,422 INFO L175 Difference]: Start difference. First operand has 410 places, 533 transitions, 8731 flow. Second operand 12 states and 282 transitions. [2024-06-04 16:04:34,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 571 transitions, 10771 flow [2024-06-04 16:04:38,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 571 transitions, 10414 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-04 16:04:38,942 INFO L231 Difference]: Finished difference. Result has 413 places, 536 transitions, 9092 flow [2024-06-04 16:04:38,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8374, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=331, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9092, PETRI_PLACES=413, PETRI_TRANSITIONS=536} [2024-06-04 16:04:38,942 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-04 16:04:38,942 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 536 transitions, 9092 flow [2024-06-04 16:04:38,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:38,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:38,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:38,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 16:04:38,944 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)] === [2024-06-04 16:04:38,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:38,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1584094298, now seen corresponding path program 11 times [2024-06-04 16:04:38,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:38,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410197520] [2024-06-04 16:04:38,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:38,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:39,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:39,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410197520] [2024-06-04 16:04:39,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410197520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:39,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:39,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:39,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812337379] [2024-06-04 16:04:39,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:39,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:39,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:39,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:39,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:39,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:39,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 536 transitions, 9092 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:39,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:39,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:39,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:40,392 INFO L124 PetriNetUnfolderBase]: 3241/5485 cut-off events. [2024-06-04 16:04:40,393 INFO L125 PetriNetUnfolderBase]: For 783479/783482 co-relation queries the response was YES. [2024-06-04 16:04:40,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49986 conditions, 5485 events. 3241/5485 cut-off events. For 783479/783482 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 37187 event pairs, 636 based on Foata normal form. 1/5479 useless extension candidates. Maximal degree in co-relation 49810. Up to 4634 conditions per place. [2024-06-04 16:04:40,476 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 380 selfloop transitions, 188 changer transitions 0/575 dead transitions. [2024-06-04 16:04:40,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 575 transitions, 10914 flow [2024-06-04 16:04:40,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-04 16:04:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-04 16:04:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 362 transitions. [2024-06-04 16:04:40,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070028011204482 [2024-06-04 16:04:40,480 INFO L175 Difference]: Start difference. First operand has 413 places, 536 transitions, 9092 flow. Second operand 17 states and 362 transitions. [2024-06-04 16:04:40,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 575 transitions, 10914 flow [2024-06-04 16:04:45,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 575 transitions, 10360 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 16:04:45,086 INFO L231 Difference]: Finished difference. Result has 424 places, 536 transitions, 8920 flow [2024-06-04 16:04:45,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8538, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8920, PETRI_PLACES=424, PETRI_TRANSITIONS=536} [2024-06-04 16:04:45,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-04 16:04:45,088 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 536 transitions, 8920 flow [2024-06-04 16:04:45,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:45,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:45,088 INFO 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] [2024-06-04 16:04:45,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 16:04:45,090 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)] === [2024-06-04 16:04:45,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:45,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1583708162, now seen corresponding path program 9 times [2024-06-04 16:04:45,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:45,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173167980] [2024-06-04 16:04:45,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:45,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:45,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:45,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173167980] [2024-06-04 16:04:45,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173167980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:45,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:45,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:45,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388373240] [2024-06-04 16:04:45,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:45,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:45,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:45,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:45,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:45,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:45,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 536 transitions, 8920 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:45,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:45,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:45,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:46,510 INFO L124 PetriNetUnfolderBase]: 3238/5462 cut-off events. [2024-06-04 16:04:46,510 INFO L125 PetriNetUnfolderBase]: For 794924/794927 co-relation queries the response was YES. [2024-06-04 16:04:46,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49717 conditions, 5462 events. 3238/5462 cut-off events. For 794924/794927 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 36861 event pairs, 655 based on Foata normal form. 1/5449 useless extension candidates. Maximal degree in co-relation 49540. Up to 4228 conditions per place. [2024-06-04 16:04:46,594 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 228 selfloop transitions, 336 changer transitions 0/571 dead transitions. [2024-06-04 16:04:46,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 571 transitions, 10732 flow [2024-06-04 16:04:46,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:04:46,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:04:46,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 298 transitions. [2024-06-04 16:04:46,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457875457875457 [2024-06-04 16:04:46,596 INFO L175 Difference]: Start difference. First operand has 424 places, 536 transitions, 8920 flow. Second operand 13 states and 298 transitions. [2024-06-04 16:04:46,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 571 transitions, 10732 flow [2024-06-04 16:04:51,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 571 transitions, 10324 flow, removed 12 selfloop flow, removed 16 redundant places. [2024-06-04 16:04:51,212 INFO L231 Difference]: Finished difference. Result has 421 places, 536 transitions, 9190 flow [2024-06-04 16:04:51,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8512, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9190, PETRI_PLACES=421, PETRI_TRANSITIONS=536} [2024-06-04 16:04:51,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-04 16:04:51,213 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 536 transitions, 9190 flow [2024-06-04 16:04:51,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:51,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:51,213 INFO 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] [2024-06-04 16:04:51,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 16:04:51,214 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)] === [2024-06-04 16:04:51,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:51,214 INFO L85 PathProgramCache]: Analyzing trace with hash -541096960, now seen corresponding path program 1 times [2024-06-04 16:04:51,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:51,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744467442] [2024-06-04 16:04:51,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:51,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:51,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:51,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744467442] [2024-06-04 16:04:51,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744467442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:51,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:51,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:51,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114507416] [2024-06-04 16:04:51,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:51,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:51,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:51,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:51,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:51,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:51,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 536 transitions, 9190 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:51,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:51,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:51,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:52,792 INFO L124 PetriNetUnfolderBase]: 3258/5520 cut-off events. [2024-06-04 16:04:52,793 INFO L125 PetriNetUnfolderBase]: For 833828/833828 co-relation queries the response was YES. [2024-06-04 16:04:52,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50446 conditions, 5520 events. 3258/5520 cut-off events. For 833828/833828 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 37506 event pairs, 545 based on Foata normal form. 6/5523 useless extension candidates. Maximal degree in co-relation 50268. Up to 4702 conditions per place. [2024-06-04 16:04:52,869 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 517 selfloop transitions, 44 changer transitions 0/568 dead transitions. [2024-06-04 16:04:52,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 568 transitions, 10701 flow [2024-06-04 16:04:52,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:04:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:04:52,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 16:04:52,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-04 16:04:52,870 INFO L175 Difference]: Start difference. First operand has 421 places, 536 transitions, 9190 flow. Second operand 7 states and 170 transitions. [2024-06-04 16:04:52,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 568 transitions, 10701 flow [2024-06-04 16:04:57,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 568 transitions, 10029 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-04 16:04:57,910 INFO L231 Difference]: Finished difference. Result has 417 places, 537 transitions, 8632 flow [2024-06-04 16:04:57,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8518, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8632, PETRI_PLACES=417, PETRI_TRANSITIONS=537} [2024-06-04 16:04:57,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-04 16:04:57,911 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 537 transitions, 8632 flow [2024-06-04 16:04:57,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:57,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:57,911 INFO 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] [2024-06-04 16:04:57,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 16:04:57,912 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)] === [2024-06-04 16:04:57,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:57,912 INFO L85 PathProgramCache]: Analyzing trace with hash -275399680, now seen corresponding path program 2 times [2024-06-04 16:04:57,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:57,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029635182] [2024-06-04 16:04:57,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:57,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:58,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:58,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029635182] [2024-06-04 16:04:58,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029635182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:58,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:58,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:58,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054360594] [2024-06-04 16:04:58,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:58,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:58,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:58,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:58,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:58,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:58,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 537 transitions, 8632 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:58,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:58,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:58,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:59,366 INFO L124 PetriNetUnfolderBase]: 3278/5544 cut-off events. [2024-06-04 16:04:59,366 INFO L125 PetriNetUnfolderBase]: For 848550/848550 co-relation queries the response was YES. [2024-06-04 16:04:59,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50123 conditions, 5544 events. 3278/5544 cut-off events. For 848550/848550 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37583 event pairs, 613 based on Foata normal form. 6/5547 useless extension candidates. Maximal degree in co-relation 49944. Up to 4903 conditions per place. [2024-06-04 16:04:59,450 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 518 selfloop transitions, 38 changer transitions 0/563 dead transitions. [2024-06-04 16:04:59,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 563 transitions, 9896 flow [2024-06-04 16:04:59,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:04:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:04:59,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 16:04:59,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-04 16:04:59,451 INFO L175 Difference]: Start difference. First operand has 417 places, 537 transitions, 8632 flow. Second operand 7 states and 167 transitions. [2024-06-04 16:04:59,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 563 transitions, 9896 flow [2024-06-04 16:05:04,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 563 transitions, 9816 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 16:05:04,711 INFO L231 Difference]: Finished difference. Result has 420 places, 538 transitions, 8658 flow [2024-06-04 16:05:04,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8553, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8658, PETRI_PLACES=420, PETRI_TRANSITIONS=538} [2024-06-04 16:05:04,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-04 16:05:04,712 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 538 transitions, 8658 flow [2024-06-04 16:05:04,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:04,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:04,712 INFO 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] [2024-06-04 16:05:04,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 16:05:04,712 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)] === [2024-06-04 16:05:04,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:04,713 INFO L85 PathProgramCache]: Analyzing trace with hash 280781486, now seen corresponding path program 1 times [2024-06-04 16:05:04,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:04,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804357399] [2024-06-04 16:05:04,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:04,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:04,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:04,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804357399] [2024-06-04 16:05:04,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804357399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:04,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:04,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:05:04,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917454713] [2024-06-04 16:05:04,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:04,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:05:04,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:04,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:05:04,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:05:05,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:05,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 538 transitions, 8658 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) [2024-06-04 16:05:05,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:05,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:05,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:06,102 INFO L124 PetriNetUnfolderBase]: 3286/5551 cut-off events. [2024-06-04 16:05:06,102 INFO L125 PetriNetUnfolderBase]: For 844088/844091 co-relation queries the response was YES. [2024-06-04 16:05:06,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50224 conditions, 5551 events. 3286/5551 cut-off events. For 844088/844091 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 37598 event pairs, 640 based on Foata normal form. 2/5544 useless extension candidates. Maximal degree in co-relation 50044. Up to 4905 conditions per place. [2024-06-04 16:05:06,190 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 482 selfloop transitions, 73 changer transitions 0/562 dead transitions. [2024-06-04 16:05:06,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 562 transitions, 9848 flow [2024-06-04 16:05:06,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:05:06,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:05:06,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-04 16:05:06,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:05:06,192 INFO L175 Difference]: Start difference. First operand has 420 places, 538 transitions, 8658 flow. Second operand 8 states and 184 transitions. [2024-06-04 16:05:06,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 562 transitions, 9848 flow [2024-06-04 16:05:11,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 562 transitions, 9760 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-04 16:05:11,692 INFO L231 Difference]: Finished difference. Result has 423 places, 540 transitions, 8751 flow [2024-06-04 16:05:11,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8570, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8751, PETRI_PLACES=423, PETRI_TRANSITIONS=540} [2024-06-04 16:05:11,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-04 16:05:11,693 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 540 transitions, 8751 flow [2024-06-04 16:05:11,693 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) [2024-06-04 16:05:11,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:11,693 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] [2024-06-04 16:05:11,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 16:05:11,694 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)] === [2024-06-04 16:05:11,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:11,694 INFO L85 PathProgramCache]: Analyzing trace with hash -8393154, now seen corresponding path program 1 times [2024-06-04 16:05:11,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:11,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932105526] [2024-06-04 16:05:11,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:11,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:11,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:11,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:11,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932105526] [2024-06-04 16:05:11,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932105526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:11,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:11,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:05:11,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747328937] [2024-06-04 16:05:11,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:11,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:05:11,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:11,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:05:11,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:05:12,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:12,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 540 transitions, 8751 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) [2024-06-04 16:05:12,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:12,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:12,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:13,098 INFO L124 PetriNetUnfolderBase]: 3294/5556 cut-off events. [2024-06-04 16:05:13,098 INFO L125 PetriNetUnfolderBase]: For 860698/860701 co-relation queries the response was YES. [2024-06-04 16:05:13,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50520 conditions, 5556 events. 3294/5556 cut-off events. For 860698/860701 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37571 event pairs, 664 based on Foata normal form. 2/5544 useless extension candidates. Maximal degree in co-relation 50339. Up to 4759 conditions per place. [2024-06-04 16:05:13,182 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 375 selfloop transitions, 182 changer transitions 0/564 dead transitions. [2024-06-04 16:05:13,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 564 transitions, 9971 flow [2024-06-04 16:05:13,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:05:13,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:05:13,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 16:05:13,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-04 16:05:13,184 INFO L175 Difference]: Start difference. First operand has 423 places, 540 transitions, 8751 flow. Second operand 8 states and 187 transitions. [2024-06-04 16:05:13,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 564 transitions, 9971 flow [2024-06-04 16:05:17,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 564 transitions, 9812 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 16:05:17,385 INFO L231 Difference]: Finished difference. Result has 425 places, 542 transitions, 9017 flow [2024-06-04 16:05:17,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8592, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9017, PETRI_PLACES=425, PETRI_TRANSITIONS=542} [2024-06-04 16:05:17,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-04 16:05:17,386 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 542 transitions, 9017 flow [2024-06-04 16:05:17,386 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) [2024-06-04 16:05:17,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:17,387 INFO 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] [2024-06-04 16:05:17,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 16:05:17,387 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)] === [2024-06-04 16:05:17,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:17,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1803443122, now seen corresponding path program 2 times [2024-06-04 16:05:17,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:17,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195333671] [2024-06-04 16:05:17,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:17,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:17,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:17,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195333671] [2024-06-04 16:05:17,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195333671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:17,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:17,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:05:17,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868656132] [2024-06-04 16:05:17,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:17,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:05:17,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:17,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:05:17,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:05:17,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:17,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 542 transitions, 9017 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) [2024-06-04 16:05:17,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:17,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:17,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:18,929 INFO L124 PetriNetUnfolderBase]: 3302/5589 cut-off events. [2024-06-04 16:05:18,929 INFO L125 PetriNetUnfolderBase]: For 874853/874856 co-relation queries the response was YES. [2024-06-04 16:05:18,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51079 conditions, 5589 events. 3302/5589 cut-off events. For 874853/874856 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 37985 event pairs, 646 based on Foata normal form. 2/5584 useless extension candidates. Maximal degree in co-relation 50897. Up to 4929 conditions per place. [2024-06-04 16:05:19,009 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 484 selfloop transitions, 73 changer transitions 0/564 dead transitions. [2024-06-04 16:05:19,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 564 transitions, 10209 flow [2024-06-04 16:05:19,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:05:19,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:05:19,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-04 16:05:19,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291005291005291 [2024-06-04 16:05:19,011 INFO L175 Difference]: Start difference. First operand has 425 places, 542 transitions, 9017 flow. Second operand 9 states and 200 transitions. [2024-06-04 16:05:19,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 564 transitions, 10209 flow [2024-06-04 16:05:24,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 564 transitions, 9788 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-04 16:05:24,249 INFO L231 Difference]: Finished difference. Result has 427 places, 544 transitions, 8781 flow [2024-06-04 16:05:24,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8596, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8781, PETRI_PLACES=427, PETRI_TRANSITIONS=544} [2024-06-04 16:05:24,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-04 16:05:24,250 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 544 transitions, 8781 flow [2024-06-04 16:05:24,250 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) [2024-06-04 16:05:24,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:24,250 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] [2024-06-04 16:05:24,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 16:05:24,250 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)] === [2024-06-04 16:05:24,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:24,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1066433786, now seen corresponding path program 2 times [2024-06-04 16:05:24,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:24,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112874407] [2024-06-04 16:05:24,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:24,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:24,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:24,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112874407] [2024-06-04 16:05:24,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112874407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:24,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:24,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:05:24,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806585817] [2024-06-04 16:05:24,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:24,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:05:24,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:24,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:05:24,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:05:24,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:24,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 544 transitions, 8781 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) [2024-06-04 16:05:24,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:24,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:24,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:25,611 INFO L124 PetriNetUnfolderBase]: 3310/5594 cut-off events. [2024-06-04 16:05:25,611 INFO L125 PetriNetUnfolderBase]: For 890719/890722 co-relation queries the response was YES. [2024-06-04 16:05:25,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51004 conditions, 5594 events. 3310/5594 cut-off events. For 890719/890722 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 37925 event pairs, 678 based on Foata normal form. 2/5582 useless extension candidates. Maximal degree in co-relation 50821. Up to 4783 conditions per place. [2024-06-04 16:05:25,698 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 376 selfloop transitions, 182 changer transitions 0/565 dead transitions. [2024-06-04 16:05:25,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 565 transitions, 9999 flow [2024-06-04 16:05:25,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:05:25,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:05:25,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-04 16:05:25,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-04 16:05:25,699 INFO L175 Difference]: Start difference. First operand has 427 places, 544 transitions, 8781 flow. Second operand 8 states and 186 transitions. [2024-06-04 16:05:25,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 565 transitions, 9999 flow [2024-06-04 16:05:30,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 565 transitions, 9807 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-04 16:05:30,803 INFO L231 Difference]: Finished difference. Result has 427 places, 546 transitions, 9018 flow [2024-06-04 16:05:30,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8589, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9018, PETRI_PLACES=427, PETRI_TRANSITIONS=546} [2024-06-04 16:05:30,804 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-04 16:05:30,804 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 546 transitions, 9018 flow [2024-06-04 16:05:30,804 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) [2024-06-04 16:05:30,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:30,811 INFO 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] [2024-06-04 16:05:30,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-04 16:05:30,811 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)] === [2024-06-04 16:05:30,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:30,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1347222244, now seen corresponding path program 3 times [2024-06-04 16:05:30,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:30,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805292744] [2024-06-04 16:05:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:30,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:31,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:31,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:31,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805292744] [2024-06-04 16:05:31,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805292744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:31,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:31,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:05:31,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797573167] [2024-06-04 16:05:31,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:31,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:05:31,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:31,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:05:31,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:05:31,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:31,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 546 transitions, 9018 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) [2024-06-04 16:05:31,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:31,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:31,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:32,241 INFO L124 PetriNetUnfolderBase]: 3377/5693 cut-off events. [2024-06-04 16:05:32,241 INFO L125 PetriNetUnfolderBase]: For 968036/968039 co-relation queries the response was YES. [2024-06-04 16:05:32,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53377 conditions, 5693 events. 3377/5693 cut-off events. For 968036/968039 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 38624 event pairs, 687 based on Foata normal form. 2/5681 useless extension candidates. Maximal degree in co-relation 53194. Up to 4803 conditions per place. [2024-06-04 16:05:32,334 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 380 selfloop transitions, 188 changer transitions 0/575 dead transitions. [2024-06-04 16:05:32,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 575 transitions, 10589 flow [2024-06-04 16:05:32,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:05:32,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:05:32,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 16:05:32,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-04 16:05:32,335 INFO L175 Difference]: Start difference. First operand has 427 places, 546 transitions, 9018 flow. Second operand 8 states and 191 transitions. [2024-06-04 16:05:32,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 575 transitions, 10589 flow [2024-06-04 16:05:38,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 575 transitions, 10176 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 16:05:38,296 INFO L231 Difference]: Finished difference. Result has 430 places, 551 transitions, 9138 flow [2024-06-04 16:05:38,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8605, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9138, PETRI_PLACES=430, PETRI_TRANSITIONS=551} [2024-06-04 16:05:38,302 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-04 16:05:38,303 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 551 transitions, 9138 flow [2024-06-04 16:05:38,303 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) [2024-06-04 16:05:38,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:38,303 INFO 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] [2024-06-04 16:05:38,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-04 16:05:38,303 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)] === [2024-06-04 16:05:38,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:38,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1583694274, now seen corresponding path program 4 times [2024-06-04 16:05:38,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:38,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838230172] [2024-06-04 16:05:38,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:38,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:38,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:38,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:38,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838230172] [2024-06-04 16:05:38,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838230172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:38,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:38,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:05:38,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812869703] [2024-06-04 16:05:38,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:38,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:05:38,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:38,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:05:38,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:05:38,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:38,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 551 transitions, 9138 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) [2024-06-04 16:05:38,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:38,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:38,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:39,792 INFO L124 PetriNetUnfolderBase]: 3385/5695 cut-off events. [2024-06-04 16:05:39,792 INFO L125 PetriNetUnfolderBase]: For 988015/988018 co-relation queries the response was YES. [2024-06-04 16:05:39,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53792 conditions, 5695 events. 3385/5695 cut-off events. For 988015/988018 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 38576 event pairs, 681 based on Foata normal form. 2/5683 useless extension candidates. Maximal degree in co-relation 53607. Up to 4896 conditions per place. [2024-06-04 16:05:39,887 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 385 selfloop transitions, 180 changer transitions 0/572 dead transitions. [2024-06-04 16:05:39,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 572 transitions, 10380 flow [2024-06-04 16:05:39,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:05:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:05:39,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-04 16:05:39,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-04 16:05:39,889 INFO L175 Difference]: Start difference. First operand has 430 places, 551 transitions, 9138 flow. Second operand 8 states and 186 transitions. [2024-06-04 16:05:39,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 572 transitions, 10380 flow [2024-06-04 16:05:46,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 572 transitions, 10071 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-04 16:05:46,050 INFO L231 Difference]: Finished difference. Result has 434 places, 553 transitions, 9264 flow [2024-06-04 16:05:46,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8843, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9264, PETRI_PLACES=434, PETRI_TRANSITIONS=553} [2024-06-04 16:05:46,051 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-04 16:05:46,051 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 553 transitions, 9264 flow [2024-06-04 16:05:46,051 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) [2024-06-04 16:05:46,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:46,051 INFO 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] [2024-06-04 16:05:46,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-04 16:05:46,051 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)] === [2024-06-04 16:05:46,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:46,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2035238428, now seen corresponding path program 12 times [2024-06-04 16:05:46,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:46,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983381239] [2024-06-04 16:05:46,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:46,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:46,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:46,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983381239] [2024-06-04 16:05:46,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983381239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:46,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:46,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:05:46,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173714896] [2024-06-04 16:05:46,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:46,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:05:46,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:46,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:05:46,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:05:46,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:46,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 553 transitions, 9264 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:46,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:46,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:46,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:47,616 INFO L124 PetriNetUnfolderBase]: 3382/5708 cut-off events. [2024-06-04 16:05:47,616 INFO L125 PetriNetUnfolderBase]: For 989058/989058 co-relation queries the response was YES. [2024-06-04 16:05:47,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53975 conditions, 5708 events. 3382/5708 cut-off events. For 989058/989058 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 38820 event pairs, 650 based on Foata normal form. 1/5703 useless extension candidates. Maximal degree in co-relation 53788. Up to 4915 conditions per place. [2024-06-04 16:05:47,707 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 419 selfloop transitions, 155 changer transitions 0/581 dead transitions. [2024-06-04 16:05:47,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 581 transitions, 10698 flow [2024-06-04 16:05:47,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:05:47,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:05:47,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 245 transitions. [2024-06-04 16:05:47,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-06-04 16:05:47,709 INFO L175 Difference]: Start difference. First operand has 434 places, 553 transitions, 9264 flow. Second operand 11 states and 245 transitions. [2024-06-04 16:05:47,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 581 transitions, 10698 flow [2024-06-04 16:05:53,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 581 transitions, 10293 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-04 16:05:53,561 INFO L231 Difference]: Finished difference. Result has 439 places, 553 transitions, 9175 flow [2024-06-04 16:05:53,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8859, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9175, PETRI_PLACES=439, PETRI_TRANSITIONS=553} [2024-06-04 16:05:53,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-04 16:05:53,568 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 553 transitions, 9175 flow [2024-06-04 16:05:53,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:53,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:53,569 INFO 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] [2024-06-04 16:05:53,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-04 16:05:53,569 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:53,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:53,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1875589520, now seen corresponding path program 13 times [2024-06-04 16:05:53,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:53,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054072715] [2024-06-04 16:05:53,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:53,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:53,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:53,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054072715] [2024-06-04 16:05:53,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054072715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:53,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:53,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:05:53,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544540403] [2024-06-04 16:05:53,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:53,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:05:53,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:53,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:05:53,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:05:53,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:53,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 553 transitions, 9175 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:53,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:53,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:53,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:55,160 INFO L124 PetriNetUnfolderBase]: 3387/5717 cut-off events. [2024-06-04 16:05:55,160 INFO L125 PetriNetUnfolderBase]: For 1005556/1005556 co-relation queries the response was YES. [2024-06-04 16:05:55,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54058 conditions, 5717 events. 3387/5717 cut-off events. For 1005556/1005556 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 38946 event pairs, 650 based on Foata normal form. 1/5712 useless extension candidates. Maximal degree in co-relation 53870. Up to 4858 conditions per place. [2024-06-04 16:05:55,250 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 406 selfloop transitions, 176 changer transitions 0/589 dead transitions. [2024-06-04 16:05:55,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 589 transitions, 10684 flow [2024-06-04 16:05:55,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:05:55,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:05:55,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-04 16:05:55,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:05:55,251 INFO L175 Difference]: Start difference. First operand has 439 places, 553 transitions, 9175 flow. Second operand 10 states and 235 transitions. [2024-06-04 16:05:55,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 589 transitions, 10684 flow [2024-06-04 16:06:01,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 589 transitions, 10500 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-04 16:06:01,435 INFO L231 Difference]: Finished difference. Result has 443 places, 556 transitions, 9392 flow [2024-06-04 16:06:01,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8994, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9392, PETRI_PLACES=443, PETRI_TRANSITIONS=556} [2024-06-04 16:06:01,436 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-04 16:06:01,436 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 556 transitions, 9392 flow [2024-06-04 16:06:01,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:01,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:01,436 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] [2024-06-04 16:06:01,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-04 16:06:01,436 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:01,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:01,437 INFO L85 PathProgramCache]: Analyzing trace with hash -2105678360, now seen corresponding path program 10 times [2024-06-04 16:06:01,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:01,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136251892] [2024-06-04 16:06:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:01,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:01,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:01,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136251892] [2024-06-04 16:06:01,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136251892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:01,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:01,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:01,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528377110] [2024-06-04 16:06:01,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:01,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:01,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:01,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:01,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:01,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:06:01,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 556 transitions, 9392 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:01,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:01,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:06:01,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:03,091 INFO L124 PetriNetUnfolderBase]: 3397/5735 cut-off events. [2024-06-04 16:06:03,092 INFO L125 PetriNetUnfolderBase]: For 1031093/1031093 co-relation queries the response was YES. [2024-06-04 16:06:03,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54471 conditions, 5735 events. 3397/5735 cut-off events. For 1031093/1031093 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 39060 event pairs, 652 based on Foata normal form. 2/5731 useless extension candidates. Maximal degree in co-relation 54282. Up to 4465 conditions per place. [2024-06-04 16:06:03,174 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 277 selfloop transitions, 310 changer transitions 0/594 dead transitions. [2024-06-04 16:06:03,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 594 transitions, 11162 flow [2024-06-04 16:06:03,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:06:03,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:06:03,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-04 16:06:03,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-04 16:06:03,175 INFO L175 Difference]: Start difference. First operand has 443 places, 556 transitions, 9392 flow. Second operand 10 states and 243 transitions. [2024-06-04 16:06:03,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 594 transitions, 11162 flow [2024-06-04 16:06:09,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 594 transitions, 10891 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 16:06:09,124 INFO L231 Difference]: Finished difference. Result has 446 places, 560 transitions, 9816 flow [2024-06-04 16:06:09,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9121, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9816, PETRI_PLACES=446, PETRI_TRANSITIONS=560} [2024-06-04 16:06:09,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-04 16:06:09,125 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 560 transitions, 9816 flow [2024-06-04 16:06:09,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:09,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:09,125 INFO 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] [2024-06-04 16:06:09,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-04 16:06:09,125 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:09,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:09,126 INFO L85 PathProgramCache]: Analyzing trace with hash -2094429266, now seen corresponding path program 14 times [2024-06-04 16:06:09,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:09,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079473157] [2024-06-04 16:06:09,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:09,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:09,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:09,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079473157] [2024-06-04 16:06:09,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079473157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:09,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:09,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:09,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53770099] [2024-06-04 16:06:09,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:09,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:09,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:09,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:09,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:09,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:06:09,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 560 transitions, 9816 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:09,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:09,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:06:09,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:10,793 INFO L124 PetriNetUnfolderBase]: 3394/5731 cut-off events. [2024-06-04 16:06:10,793 INFO L125 PetriNetUnfolderBase]: For 1037658/1037658 co-relation queries the response was YES. [2024-06-04 16:06:10,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54884 conditions, 5731 events. 3394/5731 cut-off events. For 1037658/1037658 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 39105 event pairs, 650 based on Foata normal form. 1/5726 useless extension candidates. Maximal degree in co-relation 54694. Up to 4869 conditions per place. [2024-06-04 16:06:10,888 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 413 selfloop transitions, 177 changer transitions 0/597 dead transitions. [2024-06-04 16:06:10,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 597 transitions, 11534 flow [2024-06-04 16:06:10,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:06:10,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:06:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 291 transitions. [2024-06-04 16:06:10,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532967032967033 [2024-06-04 16:06:10,890 INFO L175 Difference]: Start difference. First operand has 446 places, 560 transitions, 9816 flow. Second operand 13 states and 291 transitions. [2024-06-04 16:06:10,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 597 transitions, 11534 flow [2024-06-04 16:06:17,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 597 transitions, 10715 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-04 16:06:17,915 INFO L231 Difference]: Finished difference. Result has 449 places, 560 transitions, 9357 flow [2024-06-04 16:06:17,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8997, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9357, PETRI_PLACES=449, PETRI_TRANSITIONS=560} [2024-06-04 16:06:17,916 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-04 16:06:17,916 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 560 transitions, 9357 flow [2024-06-04 16:06:17,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:17,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:17,916 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] [2024-06-04 16:06:17,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-04 16:06:17,916 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:17,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:17,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1541147292, now seen corresponding path program 11 times [2024-06-04 16:06:17,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:17,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617100694] [2024-06-04 16:06:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:17,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:18,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:18,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617100694] [2024-06-04 16:06:18,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617100694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:18,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:18,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:18,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345247991] [2024-06-04 16:06:18,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:18,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:18,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:18,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:18,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:18,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:06:18,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 560 transitions, 9357 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:18,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:18,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:06:18,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:19,444 INFO L124 PetriNetUnfolderBase]: 3404/5737 cut-off events. [2024-06-04 16:06:19,444 INFO L125 PetriNetUnfolderBase]: For 1060365/1060365 co-relation queries the response was YES. [2024-06-04 16:06:19,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54472 conditions, 5737 events. 3404/5737 cut-off events. For 1060365/1060365 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 39015 event pairs, 642 based on Foata normal form. 2/5733 useless extension candidates. Maximal degree in co-relation 54282. Up to 4473 conditions per place. [2024-06-04 16:06:19,543 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 279 selfloop transitions, 315 changer transitions 0/601 dead transitions. [2024-06-04 16:06:19,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 601 transitions, 11367 flow [2024-06-04 16:06:19,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:06:19,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:06:19,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 285 transitions. [2024-06-04 16:06:19,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-04 16:06:19,545 INFO L175 Difference]: Start difference. First operand has 449 places, 560 transitions, 9357 flow. Second operand 12 states and 285 transitions. [2024-06-04 16:06:19,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 601 transitions, 11367 flow [2024-06-04 16:06:26,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 601 transitions, 10923 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-04 16:06:26,392 INFO L231 Difference]: Finished difference. Result has 449 places, 564 transitions, 9604 flow [2024-06-04 16:06:26,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8913, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9604, PETRI_PLACES=449, PETRI_TRANSITIONS=564} [2024-06-04 16:06:26,393 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-04 16:06:26,393 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 564 transitions, 9604 flow [2024-06-04 16:06:26,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:26,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:26,393 INFO 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] [2024-06-04 16:06:26,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-04 16:06:26,393 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:26,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:26,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1884843950, now seen corresponding path program 15 times [2024-06-04 16:06:26,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:26,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447370210] [2024-06-04 16:06:26,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:26,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:26,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:26,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447370210] [2024-06-04 16:06:26,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447370210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:26,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:26,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:26,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027826291] [2024-06-04 16:06:26,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:26,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:26,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:26,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:26,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:26,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:06:26,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 564 transitions, 9604 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:26,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:26,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:06:26,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:27,972 INFO L124 PetriNetUnfolderBase]: 3401/5745 cut-off events. [2024-06-04 16:06:27,973 INFO L125 PetriNetUnfolderBase]: For 1063553/1063553 co-relation queries the response was YES. [2024-06-04 16:06:28,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54811 conditions, 5745 events. 3401/5745 cut-off events. For 1063553/1063553 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 39167 event pairs, 650 based on Foata normal form. 1/5740 useless extension candidates. Maximal degree in co-relation 54620. Up to 4880 conditions per place. [2024-06-04 16:06:28,066 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 418 selfloop transitions, 177 changer transitions 0/602 dead transitions. [2024-06-04 16:06:28,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 602 transitions, 11114 flow [2024-06-04 16:06:28,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-04 16:06:28,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-04 16:06:28,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 327 transitions. [2024-06-04 16:06:28,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190476190476191 [2024-06-04 16:06:28,068 INFO L175 Difference]: Start difference. First operand has 449 places, 564 transitions, 9604 flow. Second operand 15 states and 327 transitions. [2024-06-04 16:06:28,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 602 transitions, 11114 flow [2024-06-04 16:06:34,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 602 transitions, 10456 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-04 16:06:34,875 INFO L231 Difference]: Finished difference. Result has 455 places, 564 transitions, 9306 flow [2024-06-04 16:06:34,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8946, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9306, PETRI_PLACES=455, PETRI_TRANSITIONS=564} [2024-06-04 16:06:34,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-04 16:06:34,876 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 564 transitions, 9306 flow [2024-06-04 16:06:34,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:34,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:34,876 INFO 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] [2024-06-04 16:06:34,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-04 16:06:34,877 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:34,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:34,877 INFO L85 PathProgramCache]: Analyzing trace with hash -2094250520, now seen corresponding path program 12 times [2024-06-04 16:06:34,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:34,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313267437] [2024-06-04 16:06:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:34,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:35,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:35,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313267437] [2024-06-04 16:06:35,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313267437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:35,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:35,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:35,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887870623] [2024-06-04 16:06:35,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:35,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:35,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:35,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:35,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:35,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:06:35,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 564 transitions, 9306 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:35,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:35,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:06:35,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:36,434 INFO L124 PetriNetUnfolderBase]: 3395/5737 cut-off events. [2024-06-04 16:06:36,434 INFO L125 PetriNetUnfolderBase]: For 1072974/1072974 co-relation queries the response was YES. [2024-06-04 16:06:36,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54304 conditions, 5737 events. 3395/5737 cut-off events. For 1072974/1072974 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 39138 event pairs, 652 based on Foata normal form. 2/5733 useless extension candidates. Maximal degree in co-relation 54112. Up to 4466 conditions per place. [2024-06-04 16:06:36,527 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 277 selfloop transitions, 317 changer transitions 0/601 dead transitions. [2024-06-04 16:06:36,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 601 transitions, 11044 flow [2024-06-04 16:06:36,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:06:36,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:06:36,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 300 transitions. [2024-06-04 16:06:36,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5494505494505495 [2024-06-04 16:06:36,528 INFO L175 Difference]: Start difference. First operand has 455 places, 564 transitions, 9306 flow. Second operand 13 states and 300 transitions. [2024-06-04 16:06:36,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 601 transitions, 11044 flow [2024-06-04 16:06:43,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 601 transitions, 10590 flow, removed 12 selfloop flow, removed 14 redundant places. [2024-06-04 16:06:43,458 INFO L231 Difference]: Finished difference. Result has 454 places, 564 transitions, 9493 flow [2024-06-04 16:06:43,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8852, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9493, PETRI_PLACES=454, PETRI_TRANSITIONS=564} [2024-06-04 16:06:43,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-04 16:06:43,459 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 564 transitions, 9493 flow [2024-06-04 16:06:43,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:43,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:43,459 INFO 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] [2024-06-04 16:06:43,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-04 16:06:43,459 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:43,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:43,460 INFO L85 PathProgramCache]: Analyzing trace with hash -17517562, now seen corresponding path program 13 times [2024-06-04 16:06:43,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:43,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375917949] [2024-06-04 16:06:43,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:43,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:43,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:43,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375917949] [2024-06-04 16:06:43,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375917949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:43,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:43,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:43,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645590352] [2024-06-04 16:06:43,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:43,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:43,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:43,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:43,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:43,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:06:43,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 564 transitions, 9493 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:43,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:43,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:06:43,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:44,972 INFO L124 PetriNetUnfolderBase]: 3437/5816 cut-off events. [2024-06-04 16:06:44,973 INFO L125 PetriNetUnfolderBase]: For 1117989/1117989 co-relation queries the response was YES. [2024-06-04 16:06:45,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55727 conditions, 5816 events. 3437/5816 cut-off events. For 1117989/1117989 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 39779 event pairs, 644 based on Foata normal form. 2/5815 useless extension candidates. Maximal degree in co-relation 55534. Up to 5148 conditions per place. [2024-06-04 16:06:45,065 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 515 selfloop transitions, 75 changer transitions 0/597 dead transitions. [2024-06-04 16:06:45,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 597 transitions, 11670 flow [2024-06-04 16:06:45,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:06:45,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:06:45,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-04 16:06:45,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423280423280423 [2024-06-04 16:06:45,067 INFO L175 Difference]: Start difference. First operand has 454 places, 564 transitions, 9493 flow. Second operand 9 states and 205 transitions. [2024-06-04 16:06:45,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 597 transitions, 11670 flow [2024-06-04 16:06:52,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 597 transitions, 10981 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-04 16:06:52,212 INFO L231 Difference]: Finished difference. Result has 451 places, 578 transitions, 9261 flow [2024-06-04 16:06:52,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8832, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9261, PETRI_PLACES=451, PETRI_TRANSITIONS=578} [2024-06-04 16:06:52,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-04 16:06:52,213 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 578 transitions, 9261 flow [2024-06-04 16:06:52,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:52,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:52,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:52,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-04 16:06:52,214 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:52,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:52,214 INFO L85 PathProgramCache]: Analyzing trace with hash -17696308, now seen corresponding path program 16 times [2024-06-04 16:06:52,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:52,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35495422] [2024-06-04 16:06:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:52,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:52,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:52,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35495422] [2024-06-04 16:06:52,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35495422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:52,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:52,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:06:52,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314748764] [2024-06-04 16:06:52,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:52,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:06:52,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:52,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:06:52,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:06:52,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:06:52,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 578 transitions, 9261 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) [2024-06-04 16:06:52,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:52,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:06:52,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:53,772 INFO L124 PetriNetUnfolderBase]: 3439/5821 cut-off events. [2024-06-04 16:06:53,772 INFO L125 PetriNetUnfolderBase]: For 1126383/1126383 co-relation queries the response was YES. [2024-06-04 16:06:53,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55189 conditions, 5821 events. 3439/5821 cut-off events. For 1126383/1126383 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 39865 event pairs, 644 based on Foata normal form. 2/5820 useless extension candidates. Maximal degree in co-relation 54994. Up to 5204 conditions per place. [2024-06-04 16:06:53,864 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 532 selfloop transitions, 58 changer transitions 0/597 dead transitions. [2024-06-04 16:06:53,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 597 transitions, 10766 flow [2024-06-04 16:06:53,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:06:53,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:06:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-04 16:06:53,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-04 16:06:53,865 INFO L175 Difference]: Start difference. First operand has 451 places, 578 transitions, 9261 flow. Second operand 8 states and 183 transitions. [2024-06-04 16:06:53,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 597 transitions, 10766 flow [2024-06-04 16:07:01,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 597 transitions, 10666 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-04 16:07:01,781 INFO L231 Difference]: Finished difference. Result has 456 places, 581 transitions, 9340 flow [2024-06-04 16:07:01,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9161, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9340, PETRI_PLACES=456, PETRI_TRANSITIONS=581} [2024-06-04 16:07:01,796 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 413 predicate places. [2024-06-04 16:07:01,796 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 581 transitions, 9340 flow [2024-06-04 16:07:01,797 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) [2024-06-04 16:07:01,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:01,797 INFO 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] [2024-06-04 16:07:01,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-04 16:07:01,797 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:01,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:01,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1973823116, now seen corresponding path program 17 times [2024-06-04 16:07:01,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:01,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481128429] [2024-06-04 16:07:01,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:01,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:02,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:02,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:02,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481128429] [2024-06-04 16:07:02,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481128429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:02,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:02,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:02,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260041538] [2024-06-04 16:07:02,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:02,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:02,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:02,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:02,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:02,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:02,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 581 transitions, 9340 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) [2024-06-04 16:07:02,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:02,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:02,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:03,654 INFO L124 PetriNetUnfolderBase]: 3433/5809 cut-off events. [2024-06-04 16:07:03,654 INFO L125 PetriNetUnfolderBase]: For 1130330/1130330 co-relation queries the response was YES. [2024-06-04 16:07:03,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55070 conditions, 5809 events. 3433/5809 cut-off events. For 1130330/1130330 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 39709 event pairs, 642 based on Foata normal form. 2/5808 useless extension candidates. Maximal degree in co-relation 54873. Up to 5198 conditions per place. [2024-06-04 16:07:03,753 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 533 selfloop transitions, 56 changer transitions 0/596 dead transitions. [2024-06-04 16:07:03,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 596 transitions, 10554 flow [2024-06-04 16:07:03,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:03,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:03,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-04 16:07:03,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2024-06-04 16:07:03,755 INFO L175 Difference]: Start difference. First operand has 456 places, 581 transitions, 9340 flow. Second operand 8 states and 181 transitions. [2024-06-04 16:07:03,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 596 transitions, 10554 flow [2024-06-04 16:07:12,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 596 transitions, 10410 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 16:07:12,585 INFO L231 Difference]: Finished difference. Result has 458 places, 581 transitions, 9318 flow [2024-06-04 16:07:12,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9196, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9318, PETRI_PLACES=458, PETRI_TRANSITIONS=581} [2024-06-04 16:07:12,586 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-04 16:07:12,586 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 581 transitions, 9318 flow [2024-06-04 16:07:12,586 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) [2024-06-04 16:07:12,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:12,587 INFO 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] [2024-06-04 16:07:12,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-04 16:07:12,587 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:12,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:12,587 INFO L85 PathProgramCache]: Analyzing trace with hash -305429488, now seen corresponding path program 14 times [2024-06-04 16:07:12,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:12,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196306204] [2024-06-04 16:07:12,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:12,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:12,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:12,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196306204] [2024-06-04 16:07:12,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196306204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:12,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:12,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:07:12,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990416489] [2024-06-04 16:07:12,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:12,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:07:12,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:12,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:07:12,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:07:12,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:12,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 581 transitions, 9318 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:12,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:12,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:12,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:14,319 INFO L124 PetriNetUnfolderBase]: 3427/5813 cut-off events. [2024-06-04 16:07:14,319 INFO L125 PetriNetUnfolderBase]: For 1133861/1133861 co-relation queries the response was YES. [2024-06-04 16:07:14,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54928 conditions, 5813 events. 3427/5813 cut-off events. For 1133861/1133861 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 39859 event pairs, 652 based on Foata normal form. 2/5812 useless extension candidates. Maximal degree in co-relation 54730. Up to 5142 conditions per place. [2024-06-04 16:07:14,409 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 512 selfloop transitions, 80 changer transitions 0/599 dead transitions. [2024-06-04 16:07:14,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 599 transitions, 11020 flow [2024-06-04 16:07:14,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:07:14,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:07:14,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-04 16:07:14,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-04 16:07:14,410 INFO L175 Difference]: Start difference. First operand has 458 places, 581 transitions, 9318 flow. Second operand 9 states and 203 transitions. [2024-06-04 16:07:14,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 599 transitions, 11020 flow [2024-06-04 16:07:22,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 599 transitions, 10872 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-04 16:07:22,909 INFO L231 Difference]: Finished difference. Result has 460 places, 581 transitions, 9337 flow [2024-06-04 16:07:22,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9170, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9337, PETRI_PLACES=460, PETRI_TRANSITIONS=581} [2024-06-04 16:07:22,909 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-04 16:07:22,910 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 581 transitions, 9337 flow [2024-06-04 16:07:22,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:22,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:22,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:22,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-04 16:07:22,910 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:22,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:22,910 INFO L85 PathProgramCache]: Analyzing trace with hash -597324938, now seen corresponding path program 15 times [2024-06-04 16:07:22,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:22,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127178666] [2024-06-04 16:07:22,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:22,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:23,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:23,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:23,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127178666] [2024-06-04 16:07:23,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127178666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:23,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:23,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:07:23,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798299652] [2024-06-04 16:07:23,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:23,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:07:23,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:23,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:07:23,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:07:23,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:23,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 581 transitions, 9337 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:23,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:23,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:23,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:24,706 INFO L124 PetriNetUnfolderBase]: 3461/5846 cut-off events. [2024-06-04 16:07:24,706 INFO L125 PetriNetUnfolderBase]: For 1176320/1176320 co-relation queries the response was YES. [2024-06-04 16:07:24,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55834 conditions, 5846 events. 3461/5846 cut-off events. For 1176320/1176320 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 39979 event pairs, 632 based on Foata normal form. 2/5845 useless extension candidates. Maximal degree in co-relation 55635. Up to 4829 conditions per place. [2024-06-04 16:07:24,797 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 425 selfloop transitions, 193 changer transitions 0/625 dead transitions. [2024-06-04 16:07:24,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 625 transitions, 11595 flow [2024-06-04 16:07:24,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:07:24,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:07:24,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-04 16:07:24,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 16:07:24,798 INFO L175 Difference]: Start difference. First operand has 460 places, 581 transitions, 9337 flow. Second operand 9 states and 222 transitions. [2024-06-04 16:07:24,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 625 transitions, 11595 flow [2024-06-04 16:07:33,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 625 transitions, 11449 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 16:07:33,233 INFO L231 Difference]: Finished difference. Result has 463 places, 594 transitions, 9938 flow [2024-06-04 16:07:33,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9191, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9938, PETRI_PLACES=463, PETRI_TRANSITIONS=594} [2024-06-04 16:07:33,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-04 16:07:33,234 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 594 transitions, 9938 flow [2024-06-04 16:07:33,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:33,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:33,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:33,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-04 16:07:33,234 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:33,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:33,235 INFO L85 PathProgramCache]: Analyzing trace with hash 714734632, now seen corresponding path program 16 times [2024-06-04 16:07:33,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:33,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726810738] [2024-06-04 16:07:33,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:33,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:33,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:33,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726810738] [2024-06-04 16:07:33,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726810738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:33,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:33,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:07:33,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88262957] [2024-06-04 16:07:33,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:33,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:07:33,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:33,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:07:33,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:07:33,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:33,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 594 transitions, 9938 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:33,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:33,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:33,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:35,043 INFO L124 PetriNetUnfolderBase]: 3466/5868 cut-off events. [2024-06-04 16:07:35,043 INFO L125 PetriNetUnfolderBase]: For 1188278/1188281 co-relation queries the response was YES. [2024-06-04 16:07:35,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56733 conditions, 5868 events. 3466/5868 cut-off events. For 1188278/1188281 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 40249 event pairs, 651 based on Foata normal form. 3/5867 useless extension candidates. Maximal degree in co-relation 56532. Up to 4833 conditions per place. [2024-06-04 16:07:35,129 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 415 selfloop transitions, 206 changer transitions 0/628 dead transitions. [2024-06-04 16:07:35,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 628 transitions, 12291 flow [2024-06-04 16:07:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:35,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:35,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-04 16:07:35,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-04 16:07:35,130 INFO L175 Difference]: Start difference. First operand has 463 places, 594 transitions, 9938 flow. Second operand 8 states and 203 transitions. [2024-06-04 16:07:35,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 628 transitions, 12291 flow [2024-06-04 16:07:42,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 628 transitions, 12153 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-04 16:07:42,837 INFO L231 Difference]: Finished difference. Result has 467 places, 597 transitions, 10293 flow [2024-06-04 16:07:42,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9808, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10293, PETRI_PLACES=467, PETRI_TRANSITIONS=597} [2024-06-04 16:07:42,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-04 16:07:42,838 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 597 transitions, 10293 flow [2024-06-04 16:07:42,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:42,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:42,838 INFO 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] [2024-06-04 16:07:42,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-04 16:07:42,838 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:42,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:42,839 INFO L85 PathProgramCache]: Analyzing trace with hash 714734446, now seen corresponding path program 18 times [2024-06-04 16:07:42,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:42,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391590513] [2024-06-04 16:07:42,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:42,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:43,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:43,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391590513] [2024-06-04 16:07:43,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391590513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:43,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:43,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:43,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069034524] [2024-06-04 16:07:43,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:43,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:43,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:43,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:43,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:43,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:43,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 597 transitions, 10293 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) [2024-06-04 16:07:43,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:43,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:43,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:44,506 INFO L124 PetriNetUnfolderBase]: 3476/5897 cut-off events. [2024-06-04 16:07:44,506 INFO L125 PetriNetUnfolderBase]: For 1196354/1196354 co-relation queries the response was YES. [2024-06-04 16:07:44,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57359 conditions, 5897 events. 3476/5897 cut-off events. For 1196354/1196354 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 40559 event pairs, 652 based on Foata normal form. 2/5896 useless extension candidates. Maximal degree in co-relation 57157. Up to 4996 conditions per place. [2024-06-04 16:07:44,778 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 474 selfloop transitions, 154 changer transitions 0/635 dead transitions. [2024-06-04 16:07:44,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 635 transitions, 12233 flow [2024-06-04 16:07:44,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:44,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-04 16:07:44,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-04 16:07:44,779 INFO L175 Difference]: Start difference. First operand has 467 places, 597 transitions, 10293 flow. Second operand 8 states and 204 transitions. [2024-06-04 16:07:44,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 635 transitions, 12233 flow [2024-06-04 16:07:52,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 635 transitions, 11638 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-04 16:07:52,770 INFO L231 Difference]: Finished difference. Result has 467 places, 603 transitions, 10151 flow [2024-06-04 16:07:52,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9710, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10151, PETRI_PLACES=467, PETRI_TRANSITIONS=603} [2024-06-04 16:07:52,771 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-04 16:07:52,771 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 603 transitions, 10151 flow [2024-06-04 16:07:52,771 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) [2024-06-04 16:07:52,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:52,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:52,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-04 16:07:52,772 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:52,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:52,772 INFO L85 PathProgramCache]: Analyzing trace with hash 715120582, now seen corresponding path program 17 times [2024-06-04 16:07:52,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:52,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18247732] [2024-06-04 16:07:52,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:52,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:53,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:53,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18247732] [2024-06-04 16:07:53,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18247732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:53,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:53,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:07:53,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383147708] [2024-06-04 16:07:53,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:53,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:07:53,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:53,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:07:53,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:07:53,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:53,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 603 transitions, 10151 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:53,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:53,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:53,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:54,452 INFO L124 PetriNetUnfolderBase]: 3489/5913 cut-off events. [2024-06-04 16:07:54,452 INFO L125 PetriNetUnfolderBase]: For 1216427/1216430 co-relation queries the response was YES. [2024-06-04 16:07:54,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57610 conditions, 5913 events. 3489/5913 cut-off events. For 1216427/1216430 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 40641 event pairs, 653 based on Foata normal form. 3/5912 useless extension candidates. Maximal degree in co-relation 57407. Up to 4856 conditions per place. [2024-06-04 16:07:54,562 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 414 selfloop transitions, 216 changer transitions 0/637 dead transitions. [2024-06-04 16:07:54,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 637 transitions, 12586 flow [2024-06-04 16:07:54,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:54,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:54,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 16:07:54,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-04 16:07:54,564 INFO L175 Difference]: Start difference. First operand has 467 places, 603 transitions, 10151 flow. Second operand 8 states and 199 transitions. [2024-06-04 16:07:54,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 637 transitions, 12586 flow [2024-06-04 16:08:02,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 637 transitions, 12392 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 16:08:02,463 INFO L231 Difference]: Finished difference. Result has 469 places, 609 transitions, 10542 flow [2024-06-04 16:08:02,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9973, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10542, PETRI_PLACES=469, PETRI_TRANSITIONS=609} [2024-06-04 16:08:02,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-04 16:08:02,463 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 609 transitions, 10542 flow [2024-06-04 16:08:02,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:02,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:02,464 INFO 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] [2024-06-04 16:08:02,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-04 16:08:02,464 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:02,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:02,464 INFO L85 PathProgramCache]: Analyzing trace with hash 943021732, now seen corresponding path program 18 times [2024-06-04 16:08:02,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:02,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929739128] [2024-06-04 16:08:02,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:02,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:02,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:02,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:02,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929739128] [2024-06-04 16:08:02,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929739128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:02,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:02,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:08:02,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369004661] [2024-06-04 16:08:02,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:02,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:08:02,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:02,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:08:02,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:08:02,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:02,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 609 transitions, 10542 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:02,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:02,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:02,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:04,124 INFO L124 PetriNetUnfolderBase]: 3486/5904 cut-off events. [2024-06-04 16:08:04,125 INFO L125 PetriNetUnfolderBase]: For 1193851/1193854 co-relation queries the response was YES. [2024-06-04 16:08:04,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57541 conditions, 5904 events. 3486/5904 cut-off events. For 1193851/1193854 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 40559 event pairs, 651 based on Foata normal form. 3/5903 useless extension candidates. Maximal degree in co-relation 57339. Up to 4854 conditions per place. [2024-06-04 16:08:04,231 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 411 selfloop transitions, 216 changer transitions 0/634 dead transitions. [2024-06-04 16:08:04,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 634 transitions, 12824 flow [2024-06-04 16:08:04,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:08:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:08:04,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 16:08:04,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:08:04,233 INFO L175 Difference]: Start difference. First operand has 469 places, 609 transitions, 10542 flow. Second operand 8 states and 196 transitions. [2024-06-04 16:08:04,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 634 transitions, 12824 flow [2024-06-04 16:08:11,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 634 transitions, 12370 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-04 16:08:11,929 INFO L231 Difference]: Finished difference. Result has 473 places, 609 transitions, 10526 flow [2024-06-04 16:08:11,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10088, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10526, PETRI_PLACES=473, PETRI_TRANSITIONS=609} [2024-06-04 16:08:11,930 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 430 predicate places. [2024-06-04 16:08:11,930 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 609 transitions, 10526 flow [2024-06-04 16:08:11,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:11,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:11,930 INFO 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] [2024-06-04 16:08:11,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-04 16:08:11,930 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:11,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:11,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1740402060, now seen corresponding path program 19 times [2024-06-04 16:08:11,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:11,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491866662] [2024-06-04 16:08:11,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:11,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:12,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:12,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:12,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491866662] [2024-06-04 16:08:12,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491866662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:12,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:12,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:12,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98726247] [2024-06-04 16:08:12,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:12,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:12,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:12,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:12,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:12,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:12,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 609 transitions, 10526 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) [2024-06-04 16:08:12,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:12,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:12,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:13,631 INFO L124 PetriNetUnfolderBase]: 3480/5899 cut-off events. [2024-06-04 16:08:13,632 INFO L125 PetriNetUnfolderBase]: For 1204052/1204052 co-relation queries the response was YES. [2024-06-04 16:08:13,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57334 conditions, 5899 events. 3480/5899 cut-off events. For 1204052/1204052 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 40558 event pairs, 644 based on Foata normal form. 2/5898 useless extension candidates. Maximal degree in co-relation 57131. Up to 5004 conditions per place. [2024-06-04 16:08:13,739 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 472 selfloop transitions, 161 changer transitions 0/640 dead transitions. [2024-06-04 16:08:13,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 640 transitions, 12114 flow [2024-06-04 16:08:13,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:08:13,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:08:13,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-04 16:08:13,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-04 16:08:13,741 INFO L175 Difference]: Start difference. First operand has 473 places, 609 transitions, 10526 flow. Second operand 8 states and 203 transitions. [2024-06-04 16:08:13,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 640 transitions, 12114 flow [2024-06-04 16:08:22,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 640 transitions, 11588 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-04 16:08:22,433 INFO L231 Difference]: Finished difference. Result has 474 places, 609 transitions, 10345 flow [2024-06-04 16:08:22,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10000, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10345, PETRI_PLACES=474, PETRI_TRANSITIONS=609} [2024-06-04 16:08:22,434 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 431 predicate places. [2024-06-04 16:08:22,434 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 609 transitions, 10345 flow [2024-06-04 16:08:22,434 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) [2024-06-04 16:08:22,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:22,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:22,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-04 16:08:22,435 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:22,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:22,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1977746284, now seen corresponding path program 19 times [2024-06-04 16:08:22,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:22,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240970677] [2024-06-04 16:08:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:22,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:22,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:22,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240970677] [2024-06-04 16:08:22,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240970677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:22,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:22,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:08:22,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789713287] [2024-06-04 16:08:22,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:22,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:08:22,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:22,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:08:22,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:08:22,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:22,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 609 transitions, 10345 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:22,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:22,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:22,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:24,135 INFO L124 PetriNetUnfolderBase]: 3490/5899 cut-off events. [2024-06-04 16:08:24,135 INFO L125 PetriNetUnfolderBase]: For 1214189/1214189 co-relation queries the response was YES. [2024-06-04 16:08:24,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57389 conditions, 5899 events. 3490/5899 cut-off events. For 1214189/1214189 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 40443 event pairs, 632 based on Foata normal form. 1/5897 useless extension candidates. Maximal degree in co-relation 57185. Up to 5296 conditions per place. [2024-06-04 16:08:24,241 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 590 selfloop transitions, 35 changer transitions 0/632 dead transitions. [2024-06-04 16:08:24,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 632 transitions, 11731 flow [2024-06-04 16:08:24,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:08:24,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:08:24,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-04 16:08:24,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:08:24,243 INFO L175 Difference]: Start difference. First operand has 474 places, 609 transitions, 10345 flow. Second operand 7 states and 161 transitions. [2024-06-04 16:08:24,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 632 transitions, 11731 flow [2024-06-04 16:08:31,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 632 transitions, 11346 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 16:08:31,231 INFO L231 Difference]: Finished difference. Result has 472 places, 615 transitions, 10136 flow [2024-06-04 16:08:31,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9960, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10136, PETRI_PLACES=472, PETRI_TRANSITIONS=615} [2024-06-04 16:08:31,232 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-04 16:08:31,232 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 615 transitions, 10136 flow [2024-06-04 16:08:31,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:31,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:31,232 INFO 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] [2024-06-04 16:08:31,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-04 16:08:31,233 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:31,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:31,233 INFO L85 PathProgramCache]: Analyzing trace with hash 567362182, now seen corresponding path program 20 times [2024-06-04 16:08:31,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:31,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426830790] [2024-06-04 16:08:31,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:31,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:31,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:31,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426830790] [2024-06-04 16:08:31,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426830790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:31,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:31,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:08:31,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270668617] [2024-06-04 16:08:31,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:31,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:08:31,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:31,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:08:31,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:08:31,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:31,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 615 transitions, 10136 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:31,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:31,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:31,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:32,976 INFO L124 PetriNetUnfolderBase]: 3487/5907 cut-off events. [2024-06-04 16:08:32,977 INFO L125 PetriNetUnfolderBase]: For 1182560/1182560 co-relation queries the response was YES. [2024-06-04 16:08:33,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56661 conditions, 5907 events. 3487/5907 cut-off events. For 1182560/1182560 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 40600 event pairs, 642 based on Foata normal form. 1/5905 useless extension candidates. Maximal degree in co-relation 56458. Up to 5249 conditions per place. [2024-06-04 16:08:33,080 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 566 selfloop transitions, 64 changer transitions 0/637 dead transitions. [2024-06-04 16:08:33,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 637 transitions, 11694 flow [2024-06-04 16:08:33,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:08:33,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:08:33,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-04 16:08:33,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:08:33,081 INFO L175 Difference]: Start difference. First operand has 472 places, 615 transitions, 10136 flow. Second operand 8 states and 188 transitions. [2024-06-04 16:08:33,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 637 transitions, 11694 flow [2024-06-04 16:08:42,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 637 transitions, 11582 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-04 16:08:42,021 INFO L231 Difference]: Finished difference. Result has 476 places, 615 transitions, 10166 flow [2024-06-04 16:08:42,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10024, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10166, PETRI_PLACES=476, PETRI_TRANSITIONS=615} [2024-06-04 16:08:42,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 433 predicate places. [2024-06-04 16:08:42,022 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 615 transitions, 10166 flow [2024-06-04 16:08:42,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:42,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:42,022 INFO 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] [2024-06-04 16:08:42,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-04 16:08:42,022 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:42,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:42,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1035280028, now seen corresponding path program 21 times [2024-06-04 16:08:42,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:42,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231607556] [2024-06-04 16:08:42,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:42,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:42,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:42,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231607556] [2024-06-04 16:08:42,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231607556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:42,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:42,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:08:42,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661776711] [2024-06-04 16:08:42,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:42,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:08:42,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:42,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:08:42,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:08:42,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:42,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 615 transitions, 10166 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:42,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:42,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:42,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:43,734 INFO L124 PetriNetUnfolderBase]: 3484/5903 cut-off events. [2024-06-04 16:08:43,734 INFO L125 PetriNetUnfolderBase]: For 1194014/1194014 co-relation queries the response was YES. [2024-06-04 16:08:43,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56703 conditions, 5903 events. 3484/5903 cut-off events. For 1194014/1194014 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 40565 event pairs, 642 based on Foata normal form. 1/5901 useless extension candidates. Maximal degree in co-relation 56499. Up to 5246 conditions per place. [2024-06-04 16:08:43,837 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 565 selfloop transitions, 62 changer transitions 0/634 dead transitions. [2024-06-04 16:08:43,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 634 transitions, 11468 flow [2024-06-04 16:08:43,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:08:43,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:08:43,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 16:08:43,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-04 16:08:43,838 INFO L175 Difference]: Start difference. First operand has 476 places, 615 transitions, 10166 flow. Second operand 6 states and 149 transitions. [2024-06-04 16:08:43,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 634 transitions, 11468 flow [2024-06-04 16:08:53,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 634 transitions, 11264 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-04 16:08:53,105 INFO L231 Difference]: Finished difference. Result has 473 places, 615 transitions, 10096 flow [2024-06-04 16:08:53,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9962, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10096, PETRI_PLACES=473, PETRI_TRANSITIONS=615} [2024-06-04 16:08:53,107 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 430 predicate places. [2024-06-04 16:08:53,107 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 615 transitions, 10096 flow [2024-06-04 16:08:53,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:53,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:53,108 INFO 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] [2024-06-04 16:08:53,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-04 16:08:53,108 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:08:53,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:53,108 INFO L85 PathProgramCache]: Analyzing trace with hash 567124846, now seen corresponding path program 20 times [2024-06-04 16:08:53,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:53,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408918273] [2024-06-04 16:08:53,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:53,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:53,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:53,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408918273] [2024-06-04 16:08:53,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408918273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:53,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:53,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:08:53,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938645500] [2024-06-04 16:08:53,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:53,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:08:53,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:53,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:08:53,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:08:53,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:53,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 615 transitions, 10096 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) [2024-06-04 16:08:53,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:53,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:53,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:54,717 INFO L124 PetriNetUnfolderBase]: 3478/5907 cut-off events. [2024-06-04 16:08:54,717 INFO L125 PetriNetUnfolderBase]: For 1165372/1165372 co-relation queries the response was YES. [2024-06-04 16:08:54,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56212 conditions, 5907 events. 3478/5907 cut-off events. For 1165372/1165372 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 40679 event pairs, 652 based on Foata normal form. 2/5906 useless extension candidates. Maximal degree in co-relation 56008. Up to 5163 conditions per place. [2024-06-04 16:08:54,814 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 552 selfloop transitions, 80 changer transitions 0/639 dead transitions. [2024-06-04 16:08:54,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 639 transitions, 11450 flow [2024-06-04 16:08:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:08:54,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:08:54,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-04 16:08:54,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-04 16:08:54,816 INFO L175 Difference]: Start difference. First operand has 473 places, 615 transitions, 10096 flow. Second operand 6 states and 157 transitions. [2024-06-04 16:08:54,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 639 transitions, 11450 flow [2024-06-04 16:09:04,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 639 transitions, 11194 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 16:09:04,109 INFO L231 Difference]: Finished difference. Result has 473 places, 617 transitions, 10121 flow [2024-06-04 16:09:04,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9840, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10121, PETRI_PLACES=473, PETRI_TRANSITIONS=617} [2024-06-04 16:09:04,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 430 predicate places. [2024-06-04 16:09:04,109 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 617 transitions, 10121 flow [2024-06-04 16:09:04,110 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) [2024-06-04 16:09:04,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:04,110 INFO 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] [2024-06-04 16:09:04,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-04 16:09:04,110 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:04,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:04,110 INFO L85 PathProgramCache]: Analyzing trace with hash 167103184, now seen corresponding path program 22 times [2024-06-04 16:09:04,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:04,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815261955] [2024-06-04 16:09:04,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:04,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:04,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:04,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815261955] [2024-06-04 16:09:04,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815261955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:04,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:04,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:09:04,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059609533] [2024-06-04 16:09:04,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:04,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:09:04,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:04,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:09:04,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:09:04,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:04,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 617 transitions, 10121 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:04,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:04,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:04,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:05,791 INFO L124 PetriNetUnfolderBase]: 3472/5875 cut-off events. [2024-06-04 16:09:05,791 INFO L125 PetriNetUnfolderBase]: For 1155877/1155877 co-relation queries the response was YES. [2024-06-04 16:09:05,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56070 conditions, 5875 events. 3472/5875 cut-off events. For 1155877/1155877 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 40297 event pairs, 632 based on Foata normal form. 2/5874 useless extension candidates. Maximal degree in co-relation 55865. Up to 4843 conditions per place. [2024-06-04 16:09:06,060 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 425 selfloop transitions, 218 changer transitions 0/650 dead transitions. [2024-06-04 16:09:06,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 650 transitions, 11977 flow [2024-06-04 16:09:06,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:09:06,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:09:06,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-04 16:09:06,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-04 16:09:06,061 INFO L175 Difference]: Start difference. First operand has 473 places, 617 transitions, 10121 flow. Second operand 9 states and 224 transitions. [2024-06-04 16:09:06,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 650 transitions, 11977 flow [2024-06-04 16:09:11,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 650 transitions, 11642 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-04 16:09:11,817 INFO L231 Difference]: Finished difference. Result has 474 places, 617 transitions, 10238 flow [2024-06-04 16:09:11,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9790, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10238, PETRI_PLACES=474, PETRI_TRANSITIONS=617} [2024-06-04 16:09:11,818 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 431 predicate places. [2024-06-04 16:09:11,818 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 617 transitions, 10238 flow [2024-06-04 16:09:11,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:11,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:11,818 INFO 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] [2024-06-04 16:09:11,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-04 16:09:11,818 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:11,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:11,819 INFO L85 PathProgramCache]: Analyzing trace with hash 567032776, now seen corresponding path program 3 times [2024-06-04 16:09:11,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:11,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477796536] [2024-06-04 16:09:11,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:11,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:12,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:12,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477796536] [2024-06-04 16:09:12,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477796536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:12,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:12,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:09:12,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856721290] [2024-06-04 16:09:12,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:12,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:09:12,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:12,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:09:12,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:09:12,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:12,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 617 transitions, 10238 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:12,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:12,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:12,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:13,540 INFO L124 PetriNetUnfolderBase]: 3459/5868 cut-off events. [2024-06-04 16:09:13,540 INFO L125 PetriNetUnfolderBase]: For 1140671/1140671 co-relation queries the response was YES. [2024-06-04 16:09:13,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55398 conditions, 5868 events. 3459/5868 cut-off events. For 1140671/1140671 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 40365 event pairs, 551 based on Foata normal form. 6/5871 useless extension candidates. Maximal degree in co-relation 55195. Up to 5108 conditions per place. [2024-06-04 16:09:13,641 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 601 selfloop transitions, 37 changer transitions 0/645 dead transitions. [2024-06-04 16:09:13,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 645 transitions, 11679 flow [2024-06-04 16:09:13,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:09:13,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:09:13,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-04 16:09:13,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-04 16:09:13,642 INFO L175 Difference]: Start difference. First operand has 474 places, 617 transitions, 10238 flow. Second operand 6 states and 151 transitions. [2024-06-04 16:09:13,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 645 transitions, 11679 flow [2024-06-04 16:09:21,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 645 transitions, 11266 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 16:09:21,666 INFO L231 Difference]: Finished difference. Result has 472 places, 617 transitions, 9903 flow [2024-06-04 16:09:21,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9825, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9903, PETRI_PLACES=472, PETRI_TRANSITIONS=617} [2024-06-04 16:09:21,666 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-04 16:09:21,667 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 617 transitions, 9903 flow [2024-06-04 16:09:21,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:21,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:21,667 INFO 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] [2024-06-04 16:09:21,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-04 16:09:21,667 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:21,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:21,668 INFO L85 PathProgramCache]: Analyzing trace with hash 244626548, now seen corresponding path program 3 times [2024-06-04 16:09:21,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:21,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059277433] [2024-06-04 16:09:21,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:21,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:21,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:21,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059277433] [2024-06-04 16:09:21,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059277433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:21,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:21,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:09:21,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61685895] [2024-06-04 16:09:21,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:21,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:09:21,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:21,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:09:21,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:09:21,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:21,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 617 transitions, 9903 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) [2024-06-04 16:09:21,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:21,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:21,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:23,290 INFO L124 PetriNetUnfolderBase]: 3454/5844 cut-off events. [2024-06-04 16:09:23,291 INFO L125 PetriNetUnfolderBase]: For 1095592/1095592 co-relation queries the response was YES. [2024-06-04 16:09:23,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54632 conditions, 5844 events. 3454/5844 cut-off events. For 1095592/1095592 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 40098 event pairs, 632 based on Foata normal form. 2/5840 useless extension candidates. Maximal degree in co-relation 54429. Up to 5152 conditions per place. [2024-06-04 16:09:23,390 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 560 selfloop transitions, 69 changer transitions 0/636 dead transitions. [2024-06-04 16:09:23,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 636 transitions, 11207 flow [2024-06-04 16:09:23,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:09:23,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:09:23,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-04 16:09:23,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2024-06-04 16:09:23,391 INFO L175 Difference]: Start difference. First operand has 472 places, 617 transitions, 9903 flow. Second operand 8 states and 181 transitions. [2024-06-04 16:09:23,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 636 transitions, 11207 flow [2024-06-04 16:09:31,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 636 transitions, 11084 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 16:09:31,934 INFO L231 Difference]: Finished difference. Result has 475 places, 617 transitions, 9923 flow [2024-06-04 16:09:31,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9780, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9923, PETRI_PLACES=475, PETRI_TRANSITIONS=617} [2024-06-04 16:09:31,948 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-04 16:09:31,948 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 617 transitions, 9923 flow [2024-06-04 16:09:31,949 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) [2024-06-04 16:09:31,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:31,949 INFO 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] [2024-06-04 16:09:31,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-04 16:09:31,949 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:31,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:31,949 INFO L85 PathProgramCache]: Analyzing trace with hash -2094236632, now seen corresponding path program 5 times [2024-06-04 16:09:31,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:31,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516653607] [2024-06-04 16:09:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:31,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:32,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:32,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516653607] [2024-06-04 16:09:32,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516653607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:32,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:32,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:09:32,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480027273] [2024-06-04 16:09:32,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:32,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:09:32,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:32,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:09:32,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:09:32,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:32,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 617 transitions, 9923 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) [2024-06-04 16:09:32,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:32,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:32,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:33,514 INFO L124 PetriNetUnfolderBase]: 3431/5811 cut-off events. [2024-06-04 16:09:33,514 INFO L125 PetriNetUnfolderBase]: For 1096438/1096438 co-relation queries the response was YES. [2024-06-04 16:09:33,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53230 conditions, 5811 events. 3431/5811 cut-off events. For 1096438/1096438 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 39850 event pairs, 627 based on Foata normal form. 10/5815 useless extension candidates. Maximal degree in co-relation 53026. Up to 4929 conditions per place. [2024-06-04 16:09:33,610 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 459 selfloop transitions, 174 changer transitions 0/640 dead transitions. [2024-06-04 16:09:33,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 640 transitions, 11298 flow [2024-06-04 16:09:33,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:09:33,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:09:33,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-04 16:09:33,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:09:33,612 INFO L175 Difference]: Start difference. First operand has 475 places, 617 transitions, 9923 flow. Second operand 8 states and 188 transitions. [2024-06-04 16:09:33,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 640 transitions, 11298 flow [2024-06-04 16:09:40,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 640 transitions, 11117 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-04 16:09:40,285 INFO L231 Difference]: Finished difference. Result has 477 places, 618 transitions, 10123 flow [2024-06-04 16:09:40,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9750, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10123, PETRI_PLACES=477, PETRI_TRANSITIONS=618} [2024-06-04 16:09:40,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 434 predicate places. [2024-06-04 16:09:40,286 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 618 transitions, 10123 flow [2024-06-04 16:09:40,286 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) [2024-06-04 16:09:40,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:40,286 INFO 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] [2024-06-04 16:09:40,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-04 16:09:40,286 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:40,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:40,286 INFO L85 PathProgramCache]: Analyzing trace with hash -528715222, now seen corresponding path program 4 times [2024-06-04 16:09:40,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:40,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528012752] [2024-06-04 16:09:40,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:40,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:40,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:40,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528012752] [2024-06-04 16:09:40,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528012752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:40,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:40,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:09:40,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448724994] [2024-06-04 16:09:40,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:40,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:09:40,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:40,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:09:40,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:09:40,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:40,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 618 transitions, 10123 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) [2024-06-04 16:09:40,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:40,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:40,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:41,857 INFO L124 PetriNetUnfolderBase]: 3465/5858 cut-off events. [2024-06-04 16:09:41,857 INFO L125 PetriNetUnfolderBase]: For 1083174/1083174 co-relation queries the response was YES. [2024-06-04 16:09:41,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54420 conditions, 5858 events. 3465/5858 cut-off events. For 1083174/1083174 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 40213 event pairs, 618 based on Foata normal form. 2/5852 useless extension candidates. Maximal degree in co-relation 54215. Up to 5127 conditions per place. [2024-06-04 16:09:41,953 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 566 selfloop transitions, 74 changer transitions 0/647 dead transitions. [2024-06-04 16:09:41,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 647 transitions, 11839 flow [2024-06-04 16:09:41,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:09:41,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:09:41,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 16:09:41,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-04 16:09:41,954 INFO L175 Difference]: Start difference. First operand has 477 places, 618 transitions, 10123 flow. Second operand 7 states and 167 transitions. [2024-06-04 16:09:41,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 647 transitions, 11839 flow [2024-06-04 16:09:49,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 647 transitions, 11483 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 16:09:49,643 INFO L231 Difference]: Finished difference. Result has 479 places, 624 transitions, 10071 flow [2024-06-04 16:09:49,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9767, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10071, PETRI_PLACES=479, PETRI_TRANSITIONS=624} [2024-06-04 16:09:49,644 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-04 16:09:49,644 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 624 transitions, 10071 flow [2024-06-04 16:09:49,644 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) [2024-06-04 16:09:49,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:49,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:49,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-04 16:09:49,644 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:49,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:49,645 INFO L85 PathProgramCache]: Analyzing trace with hash -525858262, now seen corresponding path program 5 times [2024-06-04 16:09:49,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:49,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654491869] [2024-06-04 16:09:49,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:49,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:49,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:49,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:49,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654491869] [2024-06-04 16:09:49,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654491869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:49,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:49,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:09:49,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987538615] [2024-06-04 16:09:49,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:49,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:09:49,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:49,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:09:49,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:09:49,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:49,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 624 transitions, 10071 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) [2024-06-04 16:09:49,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:49,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:49,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:51,277 INFO L124 PetriNetUnfolderBase]: 3473/5877 cut-off events. [2024-06-04 16:09:51,278 INFO L125 PetriNetUnfolderBase]: For 1099756/1099756 co-relation queries the response was YES. [2024-06-04 16:09:51,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54547 conditions, 5877 events. 3473/5877 cut-off events. For 1099756/1099756 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 40358 event pairs, 627 based on Foata normal form. 2/5873 useless extension candidates. Maximal degree in co-relation 54340. Up to 5181 conditions per place. [2024-06-04 16:09:51,377 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 568 selfloop transitions, 69 changer transitions 0/644 dead transitions. [2024-06-04 16:09:51,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 644 transitions, 11439 flow [2024-06-04 16:09:51,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:09:51,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:09:51,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 16:09:51,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-04 16:09:51,378 INFO L175 Difference]: Start difference. First operand has 479 places, 624 transitions, 10071 flow. Second operand 7 states and 163 transitions. [2024-06-04 16:09:51,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 644 transitions, 11439 flow [2024-06-04 16:09:59,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 644 transitions, 11255 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-04 16:09:59,617 INFO L231 Difference]: Finished difference. Result has 483 places, 626 transitions, 10084 flow [2024-06-04 16:09:59,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9909, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10084, PETRI_PLACES=483, PETRI_TRANSITIONS=626} [2024-06-04 16:09:59,618 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 440 predicate places. [2024-06-04 16:09:59,618 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 626 transitions, 10084 flow [2024-06-04 16:09:59,618 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) [2024-06-04 16:09:59,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:59,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:59,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-04 16:09:59,619 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:59,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:59,619 INFO L85 PathProgramCache]: Analyzing trace with hash 45109836, now seen corresponding path program 6 times [2024-06-04 16:09:59,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:59,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583773059] [2024-06-04 16:09:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:59,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:59,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:59,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583773059] [2024-06-04 16:09:59,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583773059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:59,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:59,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:09:59,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007449328] [2024-06-04 16:09:59,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:59,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:09:59,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:59,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:09:59,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:09:59,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:59,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 626 transitions, 10084 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) [2024-06-04 16:09:59,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:59,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:59,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:01,247 INFO L124 PetriNetUnfolderBase]: 3481/5905 cut-off events. [2024-06-04 16:10:01,247 INFO L125 PetriNetUnfolderBase]: For 1115328/1115328 co-relation queries the response was YES. [2024-06-04 16:10:01,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54748 conditions, 5905 events. 3481/5905 cut-off events. For 1115328/1115328 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 40595 event pairs, 516 based on Foata normal form. 2/5901 useless extension candidates. Maximal degree in co-relation 54539. Up to 4980 conditions per place. [2024-06-04 16:10:01,347 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 557 selfloop transitions, 92 changer transitions 0/656 dead transitions. [2024-06-04 16:10:01,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 656 transitions, 12072 flow [2024-06-04 16:10:01,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:10:01,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:10:01,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-04 16:10:01,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:10:01,349 INFO L175 Difference]: Start difference. First operand has 483 places, 626 transitions, 10084 flow. Second operand 7 states and 168 transitions. [2024-06-04 16:10:01,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 656 transitions, 12072 flow [2024-06-04 16:10:07,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 656 transitions, 11907 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 16:10:07,089 INFO L231 Difference]: Finished difference. Result has 485 places, 631 transitions, 10251 flow [2024-06-04 16:10:07,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9919, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10251, PETRI_PLACES=485, PETRI_TRANSITIONS=631} [2024-06-04 16:10:07,090 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 442 predicate places. [2024-06-04 16:10:07,090 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 631 transitions, 10251 flow [2024-06-04 16:10:07,090 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) [2024-06-04 16:10:07,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:07,090 INFO 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] [2024-06-04 16:10:07,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-04 16:10:07,090 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:10:07,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:07,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1333813914, now seen corresponding path program 7 times [2024-06-04 16:10:07,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:07,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456283515] [2024-06-04 16:10:07,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:07,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:07,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:07,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456283515] [2024-06-04 16:10:07,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456283515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:07,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:07,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:10:07,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050642552] [2024-06-04 16:10:07,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:07,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:10:07,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:07,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:10:07,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:10:07,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:07,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 631 transitions, 10251 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) [2024-06-04 16:10:07,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:07,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:07,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:08,819 INFO L124 PetriNetUnfolderBase]: 3489/5916 cut-off events. [2024-06-04 16:10:08,819 INFO L125 PetriNetUnfolderBase]: For 1133902/1133902 co-relation queries the response was YES. [2024-06-04 16:10:08,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55273 conditions, 5916 events. 3489/5916 cut-off events. For 1133902/1133902 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 40792 event pairs, 530 based on Foata normal form. 2/5912 useless extension candidates. Maximal degree in co-relation 55063. Up to 5097 conditions per place. [2024-06-04 16:10:08,925 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 557 selfloop transitions, 93 changer transitions 0/657 dead transitions. [2024-06-04 16:10:08,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 657 transitions, 11663 flow [2024-06-04 16:10:08,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:10:08,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:10:08,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-04 16:10:08,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-04 16:10:08,926 INFO L175 Difference]: Start difference. First operand has 485 places, 631 transitions, 10251 flow. Second operand 8 states and 186 transitions. [2024-06-04 16:10:08,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 657 transitions, 11663 flow [2024-06-04 16:10:17,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 657 transitions, 11386 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-04 16:10:17,555 INFO L231 Difference]: Finished difference. Result has 489 places, 633 transitions, 10223 flow [2024-06-04 16:10:17,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10000, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10223, PETRI_PLACES=489, PETRI_TRANSITIONS=633} [2024-06-04 16:10:17,556 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-04 16:10:17,556 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 633 transitions, 10223 flow [2024-06-04 16:10:17,556 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) [2024-06-04 16:10:17,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:17,556 INFO 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] [2024-06-04 16:10:17,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-04 16:10:17,557 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:10:17,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:17,565 INFO L85 PathProgramCache]: Analyzing trace with hash 825621488, now seen corresponding path program 8 times [2024-06-04 16:10:17,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:17,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901458100] [2024-06-04 16:10:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:17,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:17,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:17,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901458100] [2024-06-04 16:10:17,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901458100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:17,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:17,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:10:17,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225682190] [2024-06-04 16:10:17,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:17,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:10:17,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:17,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:10:17,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:10:17,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:17,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 633 transitions, 10223 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) [2024-06-04 16:10:17,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:17,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:17,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:19,629 INFO L124 PetriNetUnfolderBase]: 3484/5902 cut-off events. [2024-06-04 16:10:19,630 INFO L125 PetriNetUnfolderBase]: For 1132410/1132410 co-relation queries the response was YES. [2024-06-04 16:10:19,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54857 conditions, 5902 events. 3484/5902 cut-off events. For 1132410/1132410 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 40641 event pairs, 630 based on Foata normal form. 2/5898 useless extension candidates. Maximal degree in co-relation 54646. Up to 5198 conditions per place. [2024-06-04 16:10:19,721 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 572 selfloop transitions, 73 changer transitions 0/652 dead transitions. [2024-06-04 16:10:19,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 652 transitions, 11559 flow [2024-06-04 16:10:19,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:10:19,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:10:19,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-04 16:10:19,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2024-06-04 16:10:19,724 INFO L175 Difference]: Start difference. First operand has 489 places, 633 transitions, 10223 flow. Second operand 8 states and 181 transitions. [2024-06-04 16:10:19,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 652 transitions, 11559 flow [2024-06-04 16:10:27,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 652 transitions, 11358 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 16:10:27,287 INFO L231 Difference]: Finished difference. Result has 491 places, 633 transitions, 10173 flow [2024-06-04 16:10:27,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10022, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10173, PETRI_PLACES=491, PETRI_TRANSITIONS=633} [2024-06-04 16:10:27,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 448 predicate places. [2024-06-04 16:10:27,288 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 633 transitions, 10173 flow [2024-06-04 16:10:27,288 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) [2024-06-04 16:10:27,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:27,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:27,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-04 16:10:27,288 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:10:27,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:27,289 INFO L85 PathProgramCache]: Analyzing trace with hash 835144688, now seen corresponding path program 9 times [2024-06-04 16:10:27,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:27,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881116458] [2024-06-04 16:10:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:27,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:27,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:27,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881116458] [2024-06-04 16:10:27,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881116458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:27,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:27,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:10:27,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257636529] [2024-06-04 16:10:27,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:27,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:10:27,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:27,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:10:27,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:10:27,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:27,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 633 transitions, 10173 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) [2024-06-04 16:10:27,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:27,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:27,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:29,290 INFO L124 PetriNetUnfolderBase]: 3479/5891 cut-off events. [2024-06-04 16:10:29,290 INFO L125 PetriNetUnfolderBase]: For 1131938/1131938 co-relation queries the response was YES. [2024-06-04 16:10:29,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54544 conditions, 5891 events. 3479/5891 cut-off events. For 1131938/1131938 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 40527 event pairs, 623 based on Foata normal form. 2/5883 useless extension candidates. Maximal degree in co-relation 54332. Up to 5171 conditions per place. [2024-06-04 16:10:29,497 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 569 selfloop transitions, 78 changer transitions 0/654 dead transitions. [2024-06-04 16:10:29,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 654 transitions, 11517 flow [2024-06-04 16:10:29,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:10:29,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:10:29,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-04 16:10:29,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291005291005291 [2024-06-04 16:10:29,498 INFO L175 Difference]: Start difference. First operand has 491 places, 633 transitions, 10173 flow. Second operand 9 states and 200 transitions. [2024-06-04 16:10:29,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 654 transitions, 11517 flow [2024-06-04 16:10:36,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 654 transitions, 11352 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 16:10:36,403 INFO L231 Difference]: Finished difference. Result has 494 places, 633 transitions, 10169 flow [2024-06-04 16:10:36,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10008, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10169, PETRI_PLACES=494, PETRI_TRANSITIONS=633} [2024-06-04 16:10:36,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 451 predicate places. [2024-06-04 16:10:36,404 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 633 transitions, 10169 flow [2024-06-04 16:10:36,404 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) [2024-06-04 16:10:36,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:36,404 INFO 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] [2024-06-04 16:10:36,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-04 16:10:36,404 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:10:36,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:36,404 INFO L85 PathProgramCache]: Analyzing trace with hash -48713838, now seen corresponding path program 10 times [2024-06-04 16:10:36,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:36,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236258260] [2024-06-04 16:10:36,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:36,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:36,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:36,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236258260] [2024-06-04 16:10:36,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236258260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:36,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:36,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:10:36,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788039410] [2024-06-04 16:10:36,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:36,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:10:36,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:36,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:10:36,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:10:36,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:36,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 633 transitions, 10169 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) [2024-06-04 16:10:36,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:36,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:36,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:38,453 INFO L124 PetriNetUnfolderBase]: 3523/5986 cut-off events. [2024-06-04 16:10:38,454 INFO L125 PetriNetUnfolderBase]: For 1232054/1232054 co-relation queries the response was YES. [2024-06-04 16:10:38,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55356 conditions, 5986 events. 3523/5986 cut-off events. For 1232054/1232054 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 41423 event pairs, 637 based on Foata normal form. 12/5995 useless extension candidates. Maximal degree in co-relation 55143. Up to 5315 conditions per place. [2024-06-04 16:10:38,554 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 605 selfloop transitions, 44 changer transitions 0/656 dead transitions. [2024-06-04 16:10:38,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 656 transitions, 11639 flow [2024-06-04 16:10:38,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:10:38,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:10:38,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-04 16:10:38,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-04 16:10:38,555 INFO L175 Difference]: Start difference. First operand has 494 places, 633 transitions, 10169 flow. Second operand 8 states and 183 transitions. [2024-06-04 16:10:38,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 656 transitions, 11639 flow [2024-06-04 16:10:45,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 656 transitions, 11464 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-04 16:10:45,910 INFO L231 Difference]: Finished difference. Result has 495 places, 637 transitions, 10195 flow [2024-06-04 16:10:45,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9994, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10195, PETRI_PLACES=495, PETRI_TRANSITIONS=637} [2024-06-04 16:10:45,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 452 predicate places. [2024-06-04 16:10:45,911 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 637 transitions, 10195 flow [2024-06-04 16:10:45,911 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) [2024-06-04 16:10:45,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:45,911 INFO 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] [2024-06-04 16:10:45,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-04 16:10:45,911 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:10:45,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:45,911 INFO L85 PathProgramCache]: Analyzing trace with hash -39190638, now seen corresponding path program 11 times [2024-06-04 16:10:45,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:45,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771845299] [2024-06-04 16:10:45,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:45,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:46,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:46,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771845299] [2024-06-04 16:10:46,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771845299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:46,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:46,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:10:46,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700557005] [2024-06-04 16:10:46,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:46,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:10:46,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:46,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:10:46,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:10:46,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:46,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 637 transitions, 10195 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) [2024-06-04 16:10:46,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:46,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:46,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:47,927 INFO L124 PetriNetUnfolderBase]: 3501/5964 cut-off events. [2024-06-04 16:10:47,928 INFO L125 PetriNetUnfolderBase]: For 1162244/1162244 co-relation queries the response was YES. [2024-06-04 16:10:48,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53793 conditions, 5964 events. 3501/5964 cut-off events. For 1162244/1162244 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 41372 event pairs, 615 based on Foata normal form. 12/5969 useless extension candidates. Maximal degree in co-relation 53579. Up to 5075 conditions per place. [2024-06-04 16:10:48,037 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 604 selfloop transitions, 51 changer transitions 0/662 dead transitions. [2024-06-04 16:10:48,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 662 transitions, 11653 flow [2024-06-04 16:10:48,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:10:48,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:10:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 16:10:48,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-04 16:10:48,038 INFO L175 Difference]: Start difference. First operand has 495 places, 637 transitions, 10195 flow. Second operand 8 states and 187 transitions. [2024-06-04 16:10:48,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 662 transitions, 11653 flow [2024-06-04 16:10:56,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 662 transitions, 11534 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-04 16:10:56,206 INFO L231 Difference]: Finished difference. Result has 498 places, 639 transitions, 10224 flow [2024-06-04 16:10:56,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10076, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10224, PETRI_PLACES=498, PETRI_TRANSITIONS=639} [2024-06-04 16:10:56,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 455 predicate places. [2024-06-04 16:10:56,207 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 639 transitions, 10224 flow [2024-06-04 16:10:56,207 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) [2024-06-04 16:10:56,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:56,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:56,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-04 16:10:56,207 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:10:56,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:56,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1650889768, now seen corresponding path program 6 times [2024-06-04 16:10:56,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:56,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690156300] [2024-06-04 16:10:56,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:56,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:56,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:56,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690156300] [2024-06-04 16:10:56,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690156300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:56,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:56,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:10:56,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830149264] [2024-06-04 16:10:56,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:56,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:10:56,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:56,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:10:56,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:10:56,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:56,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 639 transitions, 10224 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) [2024-06-04 16:10:56,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:56,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:56,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:58,228 INFO L124 PetriNetUnfolderBase]: 3537/6024 cut-off events. [2024-06-04 16:10:58,228 INFO L125 PetriNetUnfolderBase]: For 1166159/1166159 co-relation queries the response was YES. [2024-06-04 16:10:58,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54350 conditions, 6024 events. 3537/6024 cut-off events. For 1166159/1166159 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 41818 event pairs, 643 based on Foata normal form. 10/6031 useless extension candidates. Maximal degree in co-relation 54135. Up to 5325 conditions per place. [2024-06-04 16:10:58,325 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 599 selfloop transitions, 55 changer transitions 0/661 dead transitions. [2024-06-04 16:10:58,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 661 transitions, 11676 flow [2024-06-04 16:10:58,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:10:58,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:10:58,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-04 16:10:58,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-04 16:10:58,327 INFO L175 Difference]: Start difference. First operand has 498 places, 639 transitions, 10224 flow. Second operand 9 states and 201 transitions. [2024-06-04 16:10:58,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 661 transitions, 11676 flow [2024-06-04 16:11:07,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 661 transitions, 11560 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 16:11:07,206 INFO L231 Difference]: Finished difference. Result has 501 places, 641 transitions, 10294 flow [2024-06-04 16:11:07,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10108, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10294, PETRI_PLACES=501, PETRI_TRANSITIONS=641} [2024-06-04 16:11:07,206 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-04 16:11:07,206 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 641 transitions, 10294 flow [2024-06-04 16:11:07,207 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) [2024-06-04 16:11:07,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:07,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:11:07,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-04 16:11:07,207 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:11:07,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:07,207 INFO L85 PathProgramCache]: Analyzing trace with hash 2006107276, now seen corresponding path program 12 times [2024-06-04 16:11:07,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:07,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435448793] [2024-06-04 16:11:07,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:07,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:07,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:07,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435448793] [2024-06-04 16:11:07,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435448793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:07,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:07,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:11:07,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717801682] [2024-06-04 16:11:07,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:07,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:11:07,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:07,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:11:07,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:11:07,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:07,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 641 transitions, 10294 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) [2024-06-04 16:11:07,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:07,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:07,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:09,314 INFO L124 PetriNetUnfolderBase]: 3604/6144 cut-off events. [2024-06-04 16:11:09,314 INFO L125 PetriNetUnfolderBase]: For 1270506/1270506 co-relation queries the response was YES. [2024-06-04 16:11:09,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55210 conditions, 6144 events. 3604/6144 cut-off events. For 1270506/1270506 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 42961 event pairs, 655 based on Foata normal form. 22/6163 useless extension candidates. Maximal degree in co-relation 54994. Up to 5225 conditions per place. [2024-06-04 16:11:09,415 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 574 selfloop transitions, 98 changer transitions 0/679 dead transitions. [2024-06-04 16:11:09,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 679 transitions, 11873 flow [2024-06-04 16:11:09,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:11:09,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:11:09,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-04 16:11:09,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-04 16:11:09,417 INFO L175 Difference]: Start difference. First operand has 501 places, 641 transitions, 10294 flow. Second operand 8 states and 203 transitions. [2024-06-04 16:11:09,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 679 transitions, 11873 flow [2024-06-04 16:11:17,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 679 transitions, 11711 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-04 16:11:17,263 INFO L231 Difference]: Finished difference. Result has 502 places, 645 transitions, 10478 flow [2024-06-04 16:11:17,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10132, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10478, PETRI_PLACES=502, PETRI_TRANSITIONS=645} [2024-06-04 16:11:17,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 459 predicate places. [2024-06-04 16:11:17,277 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 645 transitions, 10478 flow [2024-06-04 16:11:17,277 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) [2024-06-04 16:11:17,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:17,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:11:17,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-04 16:11:17,277 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:11:17,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:17,277 INFO L85 PathProgramCache]: Analyzing trace with hash 2006433706, now seen corresponding path program 13 times [2024-06-04 16:11:17,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:17,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168991526] [2024-06-04 16:11:17,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:17,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:17,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:17,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168991526] [2024-06-04 16:11:17,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168991526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:17,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:17,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:11:17,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777152993] [2024-06-04 16:11:17,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:17,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:11:17,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:17,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:11:17,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:11:17,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:17,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 645 transitions, 10478 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) [2024-06-04 16:11:17,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:17,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:17,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:19,322 INFO L124 PetriNetUnfolderBase]: 3559/6098 cut-off events. [2024-06-04 16:11:19,322 INFO L125 PetriNetUnfolderBase]: For 1107409/1107409 co-relation queries the response was YES. [2024-06-04 16:11:19,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52236 conditions, 6098 events. 3559/6098 cut-off events. For 1107409/1107409 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 42677 event pairs, 490 based on Foata normal form. 22/6117 useless extension candidates. Maximal degree in co-relation 52019. Up to 4479 conditions per place. [2024-06-04 16:11:19,421 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 560 selfloop transitions, 119 changer transitions 0/686 dead transitions. [2024-06-04 16:11:19,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 686 transitions, 12324 flow [2024-06-04 16:11:19,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:11:19,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:11:19,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-04 16:11:19,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2024-06-04 16:11:19,422 INFO L175 Difference]: Start difference. First operand has 502 places, 645 transitions, 10478 flow. Second operand 8 states and 207 transitions. [2024-06-04 16:11:19,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 686 transitions, 12324 flow [2024-06-04 16:11:26,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 686 transitions, 12075 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-04 16:11:26,773 INFO L231 Difference]: Finished difference. Result has 504 places, 647 transitions, 10558 flow [2024-06-04 16:11:26,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10231, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10558, PETRI_PLACES=504, PETRI_TRANSITIONS=647} [2024-06-04 16:11:26,774 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 461 predicate places. [2024-06-04 16:11:26,774 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 647 transitions, 10558 flow [2024-06-04 16:11:26,774 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) [2024-06-04 16:11:26,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:26,775 INFO 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] [2024-06-04 16:11:26,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-04 16:11:26,775 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:11:26,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:26,775 INFO L85 PathProgramCache]: Analyzing trace with hash 715134470, now seen corresponding path program 7 times [2024-06-04 16:11:26,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:26,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109050086] [2024-06-04 16:11:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:26,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:27,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:27,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109050086] [2024-06-04 16:11:27,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109050086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:27,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:27,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:11:27,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966101926] [2024-06-04 16:11:27,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:27,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:11:27,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:27,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:11:27,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:11:27,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:27,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 647 transitions, 10558 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) [2024-06-04 16:11:27,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:27,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:27,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:28,875 INFO L124 PetriNetUnfolderBase]: 3567/6101 cut-off events. [2024-06-04 16:11:28,875 INFO L125 PetriNetUnfolderBase]: For 935633/935636 co-relation queries the response was YES. [2024-06-04 16:11:28,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52467 conditions, 6101 events. 3567/6101 cut-off events. For 935633/935636 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 42744 event pairs, 656 based on Foata normal form. 4/6101 useless extension candidates. Maximal degree in co-relation 52249. Up to 5257 conditions per place. [2024-06-04 16:11:28,972 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 541 selfloop transitions, 126 changer transitions 0/674 dead transitions. [2024-06-04 16:11:28,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 674 transitions, 12024 flow [2024-06-04 16:11:28,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:11:28,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:11:28,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 16:11:28,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-04 16:11:28,974 INFO L175 Difference]: Start difference. First operand has 504 places, 647 transitions, 10558 flow. Second operand 8 states and 191 transitions. [2024-06-04 16:11:28,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 674 transitions, 12024 flow [2024-06-04 16:11:37,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 674 transitions, 11833 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-04 16:11:37,211 INFO L231 Difference]: Finished difference. Result has 508 places, 649 transitions, 10698 flow [2024-06-04 16:11:37,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10367, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10698, PETRI_PLACES=508, PETRI_TRANSITIONS=649} [2024-06-04 16:11:37,212 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 465 predicate places. [2024-06-04 16:11:37,212 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 649 transitions, 10698 flow [2024-06-04 16:11:37,212 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) [2024-06-04 16:11:37,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:37,212 INFO 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] [2024-06-04 16:11:37,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-04 16:11:37,212 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:11:37,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:37,213 INFO L85 PathProgramCache]: Analyzing trace with hash 951309830, now seen corresponding path program 8 times [2024-06-04 16:11:37,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:37,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949667413] [2024-06-04 16:11:37,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:37,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:37,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:37,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949667413] [2024-06-04 16:11:37,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949667413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:37,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:37,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:11:37,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131835395] [2024-06-04 16:11:37,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:37,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:11:37,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:37,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:11:37,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:11:37,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:37,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 649 transitions, 10698 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) [2024-06-04 16:11:37,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:37,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:37,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:39,061 INFO L124 PetriNetUnfolderBase]: 3575/6113 cut-off events. [2024-06-04 16:11:39,062 INFO L125 PetriNetUnfolderBase]: For 933838/933841 co-relation queries the response was YES. [2024-06-04 16:11:39,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52321 conditions, 6113 events. 3575/6113 cut-off events. For 933838/933841 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 42824 event pairs, 658 based on Foata normal form. 4/6113 useless extension candidates. Maximal degree in co-relation 52102. Up to 5269 conditions per place. [2024-06-04 16:11:39,162 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 540 selfloop transitions, 126 changer transitions 0/673 dead transitions. [2024-06-04 16:11:39,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 673 transitions, 12158 flow [2024-06-04 16:11:39,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:11:39,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:11:39,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-04 16:11:39,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:11:39,163 INFO L175 Difference]: Start difference. First operand has 508 places, 649 transitions, 10698 flow. Second operand 8 states and 188 transitions. [2024-06-04 16:11:39,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 673 transitions, 12158 flow [2024-06-04 16:11:45,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 673 transitions, 11843 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-04 16:11:45,866 INFO L231 Difference]: Finished difference. Result has 510 places, 651 transitions, 10718 flow [2024-06-04 16:11:45,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10383, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10718, PETRI_PLACES=510, PETRI_TRANSITIONS=651} [2024-06-04 16:11:45,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 467 predicate places. [2024-06-04 16:11:45,866 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 651 transitions, 10718 flow [2024-06-04 16:11:45,867 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) [2024-06-04 16:11:45,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:45,867 INFO 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] [2024-06-04 16:11:45,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-04 16:11:45,867 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:11:45,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:45,867 INFO L85 PathProgramCache]: Analyzing trace with hash 951606500, now seen corresponding path program 9 times [2024-06-04 16:11:45,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:45,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048436321] [2024-06-04 16:11:45,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:45,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:46,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:46,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048436321] [2024-06-04 16:11:46,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048436321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:46,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:46,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:11:46,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190358455] [2024-06-04 16:11:46,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:46,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:11:46,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:46,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:11:46,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:11:46,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:46,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 651 transitions, 10718 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) [2024-06-04 16:11:46,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:46,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:46,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:47,770 INFO L124 PetriNetUnfolderBase]: 3629/6195 cut-off events. [2024-06-04 16:11:47,771 INFO L125 PetriNetUnfolderBase]: For 1023771/1023774 co-relation queries the response was YES. [2024-06-04 16:11:47,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54261 conditions, 6195 events. 3629/6195 cut-off events. For 1023771/1023774 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 43395 event pairs, 668 based on Foata normal form. 4/6195 useless extension candidates. Maximal degree in co-relation 54041. Up to 5234 conditions per place. [2024-06-04 16:11:47,869 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 542 selfloop transitions, 134 changer transitions 0/683 dead transitions. [2024-06-04 16:11:47,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 683 transitions, 12604 flow [2024-06-04 16:11:48,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:11:48,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:11:48,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-04 16:11:48,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-04 16:11:48,013 INFO L175 Difference]: Start difference. First operand has 510 places, 651 transitions, 10718 flow. Second operand 8 states and 193 transitions. [2024-06-04 16:11:48,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 683 transitions, 12604 flow [2024-06-04 16:11:55,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 683 transitions, 12285 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-04 16:11:55,707 INFO L231 Difference]: Finished difference. Result has 513 places, 656 transitions, 10862 flow [2024-06-04 16:11:55,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10399, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10862, PETRI_PLACES=513, PETRI_TRANSITIONS=656} [2024-06-04 16:11:55,720 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 470 predicate places. [2024-06-04 16:11:55,720 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 656 transitions, 10862 flow [2024-06-04 16:11:55,720 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) [2024-06-04 16:11:55,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:55,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:11:55,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-04 16:11:55,721 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:11:55,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:55,721 INFO L85 PathProgramCache]: Analyzing trace with hash 27075074, now seen corresponding path program 10 times [2024-06-04 16:11:55,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:55,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075195653] [2024-06-04 16:11:55,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:55,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:56,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:56,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075195653] [2024-06-04 16:11:56,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075195653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:56,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:56,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:11:56,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020452241] [2024-06-04 16:11:56,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:56,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:11:56,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:56,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:11:56,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:11:56,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:56,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 656 transitions, 10862 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) [2024-06-04 16:11:56,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:56,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:56,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:57,671 INFO L124 PetriNetUnfolderBase]: 3617/6173 cut-off events. [2024-06-04 16:11:57,672 INFO L125 PetriNetUnfolderBase]: For 1019971/1019974 co-relation queries the response was YES. [2024-06-04 16:11:57,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54033 conditions, 6173 events. 3617/6173 cut-off events. For 1019971/1019974 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 43220 event pairs, 666 based on Foata normal form. 4/6173 useless extension candidates. Maximal degree in co-relation 53811. Up to 5382 conditions per place. [2024-06-04 16:11:57,775 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 585 selfloop transitions, 88 changer transitions 0/680 dead transitions. [2024-06-04 16:11:57,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 680 transitions, 12268 flow [2024-06-04 16:11:57,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:11:57,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:11:57,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 16:11:57,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-04 16:11:57,776 INFO L175 Difference]: Start difference. First operand has 513 places, 656 transitions, 10862 flow. Second operand 7 states and 173 transitions. [2024-06-04 16:11:57,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 680 transitions, 12268 flow [2024-06-04 16:12:05,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 680 transitions, 11997 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-04 16:12:05,116 INFO L231 Difference]: Finished difference. Result has 516 places, 656 transitions, 10772 flow [2024-06-04 16:12:05,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10591, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10772, PETRI_PLACES=516, PETRI_TRANSITIONS=656} [2024-06-04 16:12:05,116 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 473 predicate places. [2024-06-04 16:12:05,116 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 656 transitions, 10772 flow [2024-06-04 16:12:05,116 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) [2024-06-04 16:12:05,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:05,117 INFO 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] [2024-06-04 16:12:05,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-04 16:12:05,117 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:05,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:05,117 INFO L85 PathProgramCache]: Analyzing trace with hash 35645954, now seen corresponding path program 11 times [2024-06-04 16:12:05,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:05,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081966843] [2024-06-04 16:12:05,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:05,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:05,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:05,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:05,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081966843] [2024-06-04 16:12:05,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081966843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:05,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:05,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:12:05,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095311605] [2024-06-04 16:12:05,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:05,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:12:05,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:05,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:12:05,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:12:05,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:05,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 656 transitions, 10772 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) [2024-06-04 16:12:05,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:05,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:05,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:07,052 INFO L124 PetriNetUnfolderBase]: 3625/6170 cut-off events. [2024-06-04 16:12:07,052 INFO L125 PetriNetUnfolderBase]: For 1029825/1029828 co-relation queries the response was YES. [2024-06-04 16:12:07,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54028 conditions, 6170 events. 3625/6170 cut-off events. For 1029825/1029828 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 43139 event pairs, 649 based on Foata normal form. 4/6170 useless extension candidates. Maximal degree in co-relation 53804. Up to 5236 conditions per place. [2024-06-04 16:12:07,157 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 579 selfloop transitions, 101 changer transitions 0/687 dead transitions. [2024-06-04 16:12:07,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 687 transitions, 12300 flow [2024-06-04 16:12:07,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:12:07,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:12:07,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-04 16:12:07,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-04 16:12:07,158 INFO L175 Difference]: Start difference. First operand has 516 places, 656 transitions, 10772 flow. Second operand 7 states and 177 transitions. [2024-06-04 16:12:07,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 687 transitions, 12300 flow [2024-06-04 16:12:15,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 687 transitions, 11970 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-04 16:12:15,466 INFO L231 Difference]: Finished difference. Result has 517 places, 659 transitions, 10750 flow [2024-06-04 16:12:15,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10442, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10750, PETRI_PLACES=517, PETRI_TRANSITIONS=659} [2024-06-04 16:12:15,466 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 474 predicate places. [2024-06-04 16:12:15,466 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 659 transitions, 10750 flow [2024-06-04 16:12:15,467 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) [2024-06-04 16:12:15,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:15,467 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] [2024-06-04 16:12:15,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-04 16:12:15,467 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:15,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:15,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1304665562, now seen corresponding path program 12 times [2024-06-04 16:12:15,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:15,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586082572] [2024-06-04 16:12:15,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:15,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:15,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:15,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586082572] [2024-06-04 16:12:15,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586082572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:15,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:15,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:12:15,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492219303] [2024-06-04 16:12:15,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:15,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:12:15,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:15,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:12:15,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:12:15,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:15,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 659 transitions, 10750 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) [2024-06-04 16:12:15,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:15,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:15,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:17,547 INFO L124 PetriNetUnfolderBase]: 3633/6211 cut-off events. [2024-06-04 16:12:17,547 INFO L125 PetriNetUnfolderBase]: For 1041707/1041710 co-relation queries the response was YES. [2024-06-04 16:12:17,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54268 conditions, 6211 events. 3633/6211 cut-off events. For 1041707/1041710 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 43610 event pairs, 473 based on Foata normal form. 4/6211 useless extension candidates. Maximal degree in co-relation 54042. Up to 4436 conditions per place. [2024-06-04 16:12:17,652 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 562 selfloop transitions, 125 changer transitions 0/694 dead transitions. [2024-06-04 16:12:17,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 694 transitions, 12589 flow [2024-06-04 16:12:17,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:12:17,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:12:17,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-04 16:12:17,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-04 16:12:17,654 INFO L175 Difference]: Start difference. First operand has 517 places, 659 transitions, 10750 flow. Second operand 7 states and 183 transitions. [2024-06-04 16:12:17,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 694 transitions, 12589 flow [2024-06-04 16:12:27,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 694 transitions, 12375 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 16:12:27,248 INFO L231 Difference]: Finished difference. Result has 520 places, 661 transitions, 10838 flow [2024-06-04 16:12:27,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10536, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10838, PETRI_PLACES=520, PETRI_TRANSITIONS=661} [2024-06-04 16:12:27,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 477 predicate places. [2024-06-04 16:12:27,249 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 661 transitions, 10838 flow [2024-06-04 16:12:27,249 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) [2024-06-04 16:12:27,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:27,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:27,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-04 16:12:27,249 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:27,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:27,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1800282626, now seen corresponding path program 13 times [2024-06-04 16:12:27,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:27,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462716662] [2024-06-04 16:12:27,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:27,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:27,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:27,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462716662] [2024-06-04 16:12:27,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462716662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:27,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:27,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:12:27,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935082113] [2024-06-04 16:12:27,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:27,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:12:27,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:27,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:12:27,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:12:27,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:27,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 661 transitions, 10838 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) [2024-06-04 16:12:27,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:27,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:27,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:29,277 INFO L124 PetriNetUnfolderBase]: 3608/6157 cut-off events. [2024-06-04 16:12:29,278 INFO L125 PetriNetUnfolderBase]: For 1039404/1039407 co-relation queries the response was YES. [2024-06-04 16:12:29,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53304 conditions, 6157 events. 3608/6157 cut-off events. For 1039404/1039407 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 43151 event pairs, 519 based on Foata normal form. 10/6163 useless extension candidates. Maximal degree in co-relation 53077. Up to 4422 conditions per place. [2024-06-04 16:12:29,379 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 573 selfloop transitions, 111 changer transitions 0/691 dead transitions. [2024-06-04 16:12:29,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 691 transitions, 12340 flow [2024-06-04 16:12:29,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:12:29,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:12:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-04 16:12:29,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-04 16:12:29,380 INFO L175 Difference]: Start difference. First operand has 520 places, 661 transitions, 10838 flow. Second operand 7 states and 178 transitions. [2024-06-04 16:12:29,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 691 transitions, 12340 flow [2024-06-04 16:12:37,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 691 transitions, 12022 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-04 16:12:37,480 INFO L231 Difference]: Finished difference. Result has 522 places, 661 transitions, 10748 flow [2024-06-04 16:12:37,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10520, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10748, PETRI_PLACES=522, PETRI_TRANSITIONS=661} [2024-06-04 16:12:37,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 479 predicate places. [2024-06-04 16:12:37,480 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 661 transitions, 10748 flow [2024-06-04 16:12:37,481 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) [2024-06-04 16:12:37,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:37,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:37,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-04 16:12:37,481 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:37,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:37,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1740594694, now seen corresponding path program 14 times [2024-06-04 16:12:37,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:37,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971917860] [2024-06-04 16:12:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:37,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:37,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:37,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971917860] [2024-06-04 16:12:37,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971917860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:37,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:37,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:12:37,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371882614] [2024-06-04 16:12:37,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:37,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:12:37,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:37,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:12:37,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:12:37,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:37,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 661 transitions, 10748 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) [2024-06-04 16:12:37,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:37,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:37,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:39,550 INFO L124 PetriNetUnfolderBase]: 3585/6126 cut-off events. [2024-06-04 16:12:39,550 INFO L125 PetriNetUnfolderBase]: For 972763/972763 co-relation queries the response was YES. [2024-06-04 16:12:39,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51432 conditions, 6126 events. 3585/6126 cut-off events. For 972763/972763 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 42941 event pairs, 641 based on Foata normal form. 10/6133 useless extension candidates. Maximal degree in co-relation 51205. Up to 5213 conditions per place. [2024-06-04 16:12:39,655 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 560 selfloop transitions, 127 changer transitions 0/694 dead transitions. [2024-06-04 16:12:39,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 694 transitions, 12261 flow [2024-06-04 16:12:39,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:12:39,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:12:39,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-04 16:12:39,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-04 16:12:39,656 INFO L175 Difference]: Start difference. First operand has 522 places, 661 transitions, 10748 flow. Second operand 9 states and 217 transitions. [2024-06-04 16:12:39,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 694 transitions, 12261 flow [2024-06-04 16:12:46,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 694 transitions, 11992 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-04 16:12:46,560 INFO L231 Difference]: Finished difference. Result has 525 places, 662 transitions, 10774 flow [2024-06-04 16:12:46,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10491, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10774, PETRI_PLACES=525, PETRI_TRANSITIONS=662} [2024-06-04 16:12:46,561 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 482 predicate places. [2024-06-04 16:12:46,561 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 662 transitions, 10774 flow [2024-06-04 16:12:46,561 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) [2024-06-04 16:12:46,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:46,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:46,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-04 16:12:46,561 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:46,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:46,562 INFO L85 PathProgramCache]: Analyzing trace with hash 780347786, now seen corresponding path program 1 times [2024-06-04 16:12:46,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:46,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314359811] [2024-06-04 16:12:46,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:46,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:46,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:46,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314359811] [2024-06-04 16:12:46,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314359811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:46,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:46,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:12:46,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552374139] [2024-06-04 16:12:46,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:46,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:12:46,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:46,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:12:46,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:12:46,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:46,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 662 transitions, 10774 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:46,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:46,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:46,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:48,560 INFO L124 PetriNetUnfolderBase]: 3619/6176 cut-off events. [2024-06-04 16:12:48,561 INFO L125 PetriNetUnfolderBase]: For 944536/944536 co-relation queries the response was YES. [2024-06-04 16:12:48,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52307 conditions, 6176 events. 3619/6176 cut-off events. For 944536/944536 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 43347 event pairs, 543 based on Foata normal form. 2/6175 useless extension candidates. Maximal degree in co-relation 52079. Up to 5343 conditions per place. [2024-06-04 16:12:48,661 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 636 selfloop transitions, 57 changer transitions 0/700 dead transitions. [2024-06-04 16:12:48,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 700 transitions, 12988 flow [2024-06-04 16:12:48,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:12:48,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:12:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 16:12:48,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:12:48,663 INFO L175 Difference]: Start difference. First operand has 525 places, 662 transitions, 10774 flow. Second operand 8 states and 192 transitions. [2024-06-04 16:12:48,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 700 transitions, 12988 flow [2024-06-04 16:12:57,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 700 transitions, 12734 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 16:12:57,103 INFO L231 Difference]: Finished difference. Result has 526 places, 668 transitions, 10829 flow [2024-06-04 16:12:57,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10520, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10829, PETRI_PLACES=526, PETRI_TRANSITIONS=668} [2024-06-04 16:12:57,104 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 483 predicate places. [2024-06-04 16:12:57,104 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 668 transitions, 10829 flow [2024-06-04 16:12:57,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:57,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:57,104 INFO 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] [2024-06-04 16:12:57,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-04 16:12:57,105 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:57,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:57,105 INFO L85 PathProgramCache]: Analyzing trace with hash 405856820, now seen corresponding path program 2 times [2024-06-04 16:12:57,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:57,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694800519] [2024-06-04 16:12:57,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:57,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:57,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:57,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:57,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694800519] [2024-06-04 16:12:57,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694800519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:57,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:57,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:12:57,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094436423] [2024-06-04 16:12:57,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:57,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:12:57,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:57,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:12:57,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:12:57,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:57,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 668 transitions, 10829 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:57,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:57,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:57,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:59,186 INFO L124 PetriNetUnfolderBase]: 3640/6207 cut-off events. [2024-06-04 16:12:59,187 INFO L125 PetriNetUnfolderBase]: For 978608/978608 co-relation queries the response was YES. [2024-06-04 16:12:59,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52882 conditions, 6207 events. 3640/6207 cut-off events. For 978608/978608 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 43529 event pairs, 547 based on Foata normal form. 2/6206 useless extension candidates. Maximal degree in co-relation 52653. Up to 5363 conditions per place. [2024-06-04 16:12:59,288 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 634 selfloop transitions, 60 changer transitions 0/701 dead transitions. [2024-06-04 16:12:59,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 701 transitions, 12987 flow [2024-06-04 16:12:59,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:12:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:12:59,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-04 16:12:59,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-04 16:12:59,289 INFO L175 Difference]: Start difference. First operand has 526 places, 668 transitions, 10829 flow. Second operand 8 states and 189 transitions. [2024-06-04 16:12:59,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 701 transitions, 12987 flow [2024-06-04 16:13:06,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 701 transitions, 12762 flow, removed 88 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:06,875 INFO L231 Difference]: Finished difference. Result has 531 places, 672 transitions, 10861 flow [2024-06-04 16:13:06,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10662, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10861, PETRI_PLACES=531, PETRI_TRANSITIONS=672} [2024-06-04 16:13:06,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 488 predicate places. [2024-06-04 16:13:06,876 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 672 transitions, 10861 flow [2024-06-04 16:13:06,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:06,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:06,876 INFO 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] [2024-06-04 16:13:06,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-04 16:13:06,876 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:06,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:06,877 INFO L85 PathProgramCache]: Analyzing trace with hash -769080950, now seen corresponding path program 3 times [2024-06-04 16:13:06,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:06,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426133963] [2024-06-04 16:13:06,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:06,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:07,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:07,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426133963] [2024-06-04 16:13:07,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426133963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:07,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:07,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:13:07,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801391428] [2024-06-04 16:13:07,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:07,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:13:07,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:07,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:13:07,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:13:07,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:13:07,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 672 transitions, 10861 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:07,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:07,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:13:07,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:09,085 INFO L124 PetriNetUnfolderBase]: 3635/6195 cut-off events. [2024-06-04 16:13:09,086 INFO L125 PetriNetUnfolderBase]: For 967449/967449 co-relation queries the response was YES. [2024-06-04 16:13:09,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52358 conditions, 6195 events. 3635/6195 cut-off events. For 967449/967449 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 43413 event pairs, 641 based on Foata normal form. 2/6194 useless extension candidates. Maximal degree in co-relation 52127. Up to 5463 conditions per place. [2024-06-04 16:13:09,190 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 644 selfloop transitions, 47 changer transitions 0/698 dead transitions. [2024-06-04 16:13:09,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 698 transitions, 12593 flow [2024-06-04 16:13:09,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:13:09,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:13:09,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-04 16:13:09,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:13:09,191 INFO L175 Difference]: Start difference. First operand has 531 places, 672 transitions, 10861 flow. Second operand 7 states and 168 transitions. [2024-06-04 16:13:09,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 698 transitions, 12593 flow [2024-06-04 16:13:17,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 698 transitions, 12447 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-04 16:13:17,752 INFO L231 Difference]: Finished difference. Result has 534 places, 672 transitions, 10814 flow [2024-06-04 16:13:17,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10715, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10814, PETRI_PLACES=534, PETRI_TRANSITIONS=672} [2024-06-04 16:13:17,753 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 491 predicate places. [2024-06-04 16:13:17,753 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 672 transitions, 10814 flow [2024-06-04 16:13:17,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:17,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:17,753 INFO 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] [2024-06-04 16:13:17,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-04 16:13:17,753 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:17,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:17,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1140714956, now seen corresponding path program 4 times [2024-06-04 16:13:17,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:17,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306174251] [2024-06-04 16:13:17,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:17,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:18,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:18,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:18,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306174251] [2024-06-04 16:13:18,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306174251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:18,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:18,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:13:18,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636230817] [2024-06-04 16:13:18,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:18,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:13:18,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:18,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:13:18,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:13:18,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:13:18,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 672 transitions, 10814 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:18,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:18,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:13:18,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:19,788 INFO L124 PetriNetUnfolderBase]: 3643/6212 cut-off events. [2024-06-04 16:13:19,789 INFO L125 PetriNetUnfolderBase]: For 980087/980087 co-relation queries the response was YES. [2024-06-04 16:13:19,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52423 conditions, 6212 events. 3643/6212 cut-off events. For 980087/980087 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 43561 event pairs, 648 based on Foata normal form. 2/6211 useless extension candidates. Maximal degree in co-relation 52191. Up to 5508 conditions per place. [2024-06-04 16:13:19,891 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 643 selfloop transitions, 45 changer transitions 0/695 dead transitions. [2024-06-04 16:13:19,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 695 transitions, 12286 flow [2024-06-04 16:13:19,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:13:19,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:13:19,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 16:13:19,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-04 16:13:19,893 INFO L175 Difference]: Start difference. First operand has 534 places, 672 transitions, 10814 flow. Second operand 7 states and 164 transitions. [2024-06-04 16:13:19,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 695 transitions, 12286 flow [2024-06-04 16:13:28,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 695 transitions, 12144 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 16:13:28,998 INFO L231 Difference]: Finished difference. Result has 534 places, 674 transitions, 10815 flow [2024-06-04 16:13:28,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10678, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10815, PETRI_PLACES=534, PETRI_TRANSITIONS=674} [2024-06-04 16:13:28,999 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 491 predicate places. [2024-06-04 16:13:28,999 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 674 transitions, 10815 flow [2024-06-04 16:13:28,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:28,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:28,999 INFO 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] [2024-06-04 16:13:29,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-04 16:13:29,000 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:29,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:29,000 INFO L85 PathProgramCache]: Analyzing trace with hash 432742794, now seen corresponding path program 5 times [2024-06-04 16:13:29,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:29,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168723815] [2024-06-04 16:13:29,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:29,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:29,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:29,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168723815] [2024-06-04 16:13:29,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168723815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:29,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:29,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:13:29,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454345643] [2024-06-04 16:13:29,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:29,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:13:29,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:29,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:13:29,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:13:29,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:13:29,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 674 transitions, 10815 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:29,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:29,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:13:29,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:31,117 INFO L124 PetriNetUnfolderBase]: 3664/6241 cut-off events. [2024-06-04 16:13:31,117 INFO L125 PetriNetUnfolderBase]: For 1014221/1014221 co-relation queries the response was YES. [2024-06-04 16:13:31,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52918 conditions, 6241 events. 3664/6241 cut-off events. For 1014221/1014221 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 43737 event pairs, 647 based on Foata normal form. 2/6238 useless extension candidates. Maximal degree in co-relation 52686. Up to 5516 conditions per place. [2024-06-04 16:13:31,222 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 643 selfloop transitions, 53 changer transitions 0/703 dead transitions. [2024-06-04 16:13:31,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 703 transitions, 12637 flow [2024-06-04 16:13:31,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:13:31,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:13:31,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-04 16:13:31,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-04 16:13:31,223 INFO L175 Difference]: Start difference. First operand has 534 places, 674 transitions, 10815 flow. Second operand 9 states and 203 transitions. [2024-06-04 16:13:31,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 703 transitions, 12637 flow [2024-06-04 16:13:39,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 703 transitions, 12522 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 16:13:39,306 INFO L231 Difference]: Finished difference. Result has 539 places, 678 transitions, 10908 flow [2024-06-04 16:13:39,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10700, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10908, PETRI_PLACES=539, PETRI_TRANSITIONS=678} [2024-06-04 16:13:39,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 496 predicate places. [2024-06-04 16:13:39,307 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 678 transitions, 10908 flow [2024-06-04 16:13:39,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:39,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:39,307 INFO 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] [2024-06-04 16:13:39,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-04 16:13:39,308 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:39,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:39,308 INFO L85 PathProgramCache]: Analyzing trace with hash 435599754, now seen corresponding path program 6 times [2024-06-04 16:13:39,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:39,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550493675] [2024-06-04 16:13:39,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:39,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:39,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:39,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550493675] [2024-06-04 16:13:39,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550493675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:39,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:39,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:13:39,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911971450] [2024-06-04 16:13:39,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:39,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:13:39,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:39,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:13:39,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:13:39,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:13:39,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 678 transitions, 10908 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:39,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:39,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:13:39,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:41,377 INFO L124 PetriNetUnfolderBase]: 3659/6236 cut-off events. [2024-06-04 16:13:41,377 INFO L125 PetriNetUnfolderBase]: For 1005838/1005838 co-relation queries the response was YES. [2024-06-04 16:13:41,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52698 conditions, 6236 events. 3659/6236 cut-off events. For 1005838/1005838 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 43769 event pairs, 650 based on Foata normal form. 2/6235 useless extension candidates. Maximal degree in co-relation 52464. Up to 5532 conditions per place. [2024-06-04 16:13:41,481 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 647 selfloop transitions, 47 changer transitions 0/701 dead transitions. [2024-06-04 16:13:41,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 701 transitions, 12352 flow [2024-06-04 16:13:41,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:13:41,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:13:41,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-04 16:13:41,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-06-04 16:13:41,483 INFO L175 Difference]: Start difference. First operand has 539 places, 678 transitions, 10908 flow. Second operand 9 states and 202 transitions. [2024-06-04 16:13:41,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 701 transitions, 12352 flow [2024-06-04 16:13:50,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 701 transitions, 12202 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-04 16:13:50,218 INFO L231 Difference]: Finished difference. Result has 542 places, 678 transitions, 10857 flow [2024-06-04 16:13:50,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10758, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10857, PETRI_PLACES=542, PETRI_TRANSITIONS=678} [2024-06-04 16:13:50,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 499 predicate places. [2024-06-04 16:13:50,219 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 678 transitions, 10857 flow [2024-06-04 16:13:50,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:50,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:50,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:50,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-04 16:13:50,220 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:50,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:50,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2085547785, now seen corresponding path program 1 times [2024-06-04 16:13:50,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:50,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338159471] [2024-06-04 16:13:50,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:50,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:50,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:50,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338159471] [2024-06-04 16:13:50,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338159471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:50,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:50,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:13:50,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595320675] [2024-06-04 16:13:50,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:50,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:13:50,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:50,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:13:50,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:13:50,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:13:50,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 678 transitions, 10857 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:50,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:50,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:13:50,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:52,349 INFO L124 PetriNetUnfolderBase]: 3680/6261 cut-off events. [2024-06-04 16:13:52,349 INFO L125 PetriNetUnfolderBase]: For 1030073/1030073 co-relation queries the response was YES. [2024-06-04 16:13:52,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53177 conditions, 6261 events. 3680/6261 cut-off events. For 1030073/1030073 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 44042 event pairs, 675 based on Foata normal form. 1/6253 useless extension candidates. Maximal degree in co-relation 52942. Up to 5219 conditions per place. [2024-06-04 16:13:52,455 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 451 selfloop transitions, 247 changer transitions 0/705 dead transitions. [2024-06-04 16:13:52,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 705 transitions, 12726 flow [2024-06-04 16:13:52,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:13:52,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:13:52,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 16:13:52,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-04 16:13:52,457 INFO L175 Difference]: Start difference. First operand has 542 places, 678 transitions, 10857 flow. Second operand 7 states and 173 transitions. [2024-06-04 16:13:52,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 705 transitions, 12726 flow [2024-06-04 16:14:00,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 705 transitions, 12622 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:00,962 INFO L231 Difference]: Finished difference. Result has 542 places, 687 transitions, 11529 flow [2024-06-04 16:14:00,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10753, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11529, PETRI_PLACES=542, PETRI_TRANSITIONS=687} [2024-06-04 16:14:00,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 499 predicate places. [2024-06-04 16:14:00,976 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 687 transitions, 11529 flow [2024-06-04 16:14:00,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:00,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:00,977 INFO 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] [2024-06-04 16:14:00,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-04 16:14:00,977 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:00,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:00,977 INFO L85 PathProgramCache]: Analyzing trace with hash -835332663, now seen corresponding path program 2 times [2024-06-04 16:14:00,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:00,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229828636] [2024-06-04 16:14:00,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:00,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:01,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:01,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:01,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229828636] [2024-06-04 16:14:01,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229828636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:01,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:01,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:01,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420498646] [2024-06-04 16:14:01,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:01,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:01,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:01,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:01,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:01,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:01,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 687 transitions, 11529 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:01,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:01,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:01,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:03,157 INFO L124 PetriNetUnfolderBase]: 3693/6293 cut-off events. [2024-06-04 16:14:03,157 INFO L125 PetriNetUnfolderBase]: For 1055563/1055563 co-relation queries the response was YES. [2024-06-04 16:14:03,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54332 conditions, 6293 events. 3693/6293 cut-off events. For 1055563/1055563 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 44275 event pairs, 650 based on Foata normal form. 1/6291 useless extension candidates. Maximal degree in co-relation 54095. Up to 5546 conditions per place. [2024-06-04 16:14:03,260 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 635 selfloop transitions, 80 changer transitions 0/722 dead transitions. [2024-06-04 16:14:03,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 722 transitions, 13429 flow [2024-06-04 16:14:03,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:14:03,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:14:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-04 16:14:03,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582010582010583 [2024-06-04 16:14:03,261 INFO L175 Difference]: Start difference. First operand has 542 places, 687 transitions, 11529 flow. Second operand 9 states and 211 transitions. [2024-06-04 16:14:03,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 722 transitions, 13429 flow [2024-06-04 16:14:11,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 722 transitions, 13209 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-04 16:14:11,116 INFO L231 Difference]: Finished difference. Result has 547 places, 693 transitions, 11585 flow [2024-06-04 16:14:11,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11311, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11585, PETRI_PLACES=547, PETRI_TRANSITIONS=693} [2024-06-04 16:14:11,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 504 predicate places. [2024-06-04 16:14:11,117 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 693 transitions, 11585 flow [2024-06-04 16:14:11,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:11,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:11,117 INFO 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] [2024-06-04 16:14:11,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-04 16:14:11,117 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:11,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:11,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1786777803, now seen corresponding path program 3 times [2024-06-04 16:14:11,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:11,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382481971] [2024-06-04 16:14:11,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:11,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:11,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:11,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382481971] [2024-06-04 16:14:11,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382481971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:11,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:11,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:14:11,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101777425] [2024-06-04 16:14:11,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:11,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:14:11,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:11,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:14:11,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:14:11,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:11,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 693 transitions, 11585 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:11,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:11,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:11,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:13,200 INFO L124 PetriNetUnfolderBase]: 3690/6289 cut-off events. [2024-06-04 16:14:13,201 INFO L125 PetriNetUnfolderBase]: For 1044161/1044161 co-relation queries the response was YES. [2024-06-04 16:14:13,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54247 conditions, 6289 events. 3690/6289 cut-off events. For 1044161/1044161 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 44247 event pairs, 650 based on Foata normal form. 1/6287 useless extension candidates. Maximal degree in co-relation 54009. Up to 5510 conditions per place. [2024-06-04 16:14:13,475 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 607 selfloop transitions, 100 changer transitions 0/714 dead transitions. [2024-06-04 16:14:13,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 714 transitions, 13051 flow [2024-06-04 16:14:13,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:14:13,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:14:13,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 16:14:13,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-04 16:14:13,476 INFO L175 Difference]: Start difference. First operand has 547 places, 693 transitions, 11585 flow. Second operand 8 states and 187 transitions. [2024-06-04 16:14:13,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 714 transitions, 13051 flow [2024-06-04 16:14:21,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 714 transitions, 12939 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-04 16:14:21,933 INFO L231 Difference]: Finished difference. Result has 551 places, 693 transitions, 11683 flow [2024-06-04 16:14:21,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11473, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11683, PETRI_PLACES=551, PETRI_TRANSITIONS=693} [2024-06-04 16:14:21,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 508 predicate places. [2024-06-04 16:14:21,934 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 693 transitions, 11683 flow [2024-06-04 16:14:21,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:21,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:21,935 INFO 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] [2024-06-04 16:14:21,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-04 16:14:21,935 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:21,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:21,935 INFO L85 PathProgramCache]: Analyzing trace with hash 62757213, now seen corresponding path program 4 times [2024-06-04 16:14:21,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:21,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143942643] [2024-06-04 16:14:21,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:21,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:22,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:22,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143942643] [2024-06-04 16:14:22,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143942643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:22,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:22,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:14:22,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109214246] [2024-06-04 16:14:22,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:22,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:14:22,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:22,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:14:22,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:14:22,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:22,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 693 transitions, 11683 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:22,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:22,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:22,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:24,263 INFO L124 PetriNetUnfolderBase]: 3703/6311 cut-off events. [2024-06-04 16:14:24,264 INFO L125 PetriNetUnfolderBase]: For 1068598/1068598 co-relation queries the response was YES. [2024-06-04 16:14:24,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54816 conditions, 6311 events. 3703/6311 cut-off events. For 1068598/1068598 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 44401 event pairs, 650 based on Foata normal form. 1/6309 useless extension candidates. Maximal degree in co-relation 54576. Up to 5515 conditions per place. [2024-06-04 16:14:24,371 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 600 selfloop transitions, 118 changer transitions 0/725 dead transitions. [2024-06-04 16:14:24,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 725 transitions, 13593 flow [2024-06-04 16:14:24,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:14:24,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:14:24,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 264 transitions. [2024-06-04 16:14:24,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-04 16:14:24,372 INFO L175 Difference]: Start difference. First operand has 551 places, 693 transitions, 11683 flow. Second operand 12 states and 264 transitions. [2024-06-04 16:14:24,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 725 transitions, 13593 flow [2024-06-04 16:14:33,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 725 transitions, 13389 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 16:14:33,451 INFO L231 Difference]: Finished difference. Result has 556 places, 699 transitions, 11847 flow [2024-06-04 16:14:33,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11481, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11847, PETRI_PLACES=556, PETRI_TRANSITIONS=699} [2024-06-04 16:14:33,452 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 513 predicate places. [2024-06-04 16:14:33,452 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 699 transitions, 11847 flow [2024-06-04 16:14:33,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:33,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:33,453 INFO 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] [2024-06-04 16:14:33,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-04 16:14:33,453 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:33,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:33,453 INFO L85 PathProgramCache]: Analyzing trace with hash 55405563, now seen corresponding path program 5 times [2024-06-04 16:14:33,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:33,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619613755] [2024-06-04 16:14:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:33,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:33,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:33,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619613755] [2024-06-04 16:14:33,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619613755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:33,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:33,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:14:33,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774689984] [2024-06-04 16:14:33,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:33,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:14:33,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:33,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:14:33,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:14:33,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:33,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 699 transitions, 11847 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:33,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:33,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:33,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:35,601 INFO L124 PetriNetUnfolderBase]: 3700/6307 cut-off events. [2024-06-04 16:14:35,602 INFO L125 PetriNetUnfolderBase]: For 1057529/1057529 co-relation queries the response was YES. [2024-06-04 16:14:35,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54683 conditions, 6307 events. 3700/6307 cut-off events. For 1057529/1057529 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 44376 event pairs, 650 based on Foata normal form. 1/6305 useless extension candidates. Maximal degree in co-relation 54443. Up to 5524 conditions per place. [2024-06-04 16:14:35,873 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 613 selfloop transitions, 102 changer transitions 0/722 dead transitions. [2024-06-04 16:14:35,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 722 transitions, 13333 flow [2024-06-04 16:14:35,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:14:35,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:14:35,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-04 16:14:35,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-04 16:14:35,874 INFO L175 Difference]: Start difference. First operand has 556 places, 699 transitions, 11847 flow. Second operand 10 states and 228 transitions. [2024-06-04 16:14:35,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 722 transitions, 13333 flow [2024-06-04 16:14:46,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 722 transitions, 13135 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-04 16:14:46,032 INFO L231 Difference]: Finished difference. Result has 557 places, 699 transitions, 11863 flow [2024-06-04 16:14:46,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11649, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11863, PETRI_PLACES=557, PETRI_TRANSITIONS=699} [2024-06-04 16:14:46,033 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 514 predicate places. [2024-06-04 16:14:46,033 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 699 transitions, 11863 flow [2024-06-04 16:14:46,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:46,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:46,033 INFO 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] [2024-06-04 16:14:46,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-04 16:14:46,033 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:46,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:46,034 INFO L85 PathProgramCache]: Analyzing trace with hash 55399983, now seen corresponding path program 6 times [2024-06-04 16:14:46,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:46,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878532244] [2024-06-04 16:14:46,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:46,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:46,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:46,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878532244] [2024-06-04 16:14:46,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878532244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:46,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:46,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:14:46,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449086440] [2024-06-04 16:14:46,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:46,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:14:46,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:46,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:14:46,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:14:46,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:46,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 699 transitions, 11863 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:46,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:46,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:46,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:48,190 INFO L124 PetriNetUnfolderBase]: 3697/6303 cut-off events. [2024-06-04 16:14:48,190 INFO L125 PetriNetUnfolderBase]: For 1046238/1046238 co-relation queries the response was YES. [2024-06-04 16:14:48,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54608 conditions, 6303 events. 3697/6303 cut-off events. For 1046238/1046238 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 44363 event pairs, 650 based on Foata normal form. 1/6301 useless extension candidates. Maximal degree in co-relation 54367. Up to 5484 conditions per place. [2024-06-04 16:14:48,534 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 582 selfloop transitions, 134 changer transitions 0/723 dead transitions. [2024-06-04 16:14:48,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 723 transitions, 13353 flow [2024-06-04 16:14:48,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:14:48,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:14:48,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-04 16:14:48,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538961038961039 [2024-06-04 16:14:48,536 INFO L175 Difference]: Start difference. First operand has 557 places, 699 transitions, 11863 flow. Second operand 11 states and 249 transitions. [2024-06-04 16:14:48,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 723 transitions, 13353 flow [2024-06-04 16:14:55,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 723 transitions, 13129 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-04 16:14:55,215 INFO L231 Difference]: Finished difference. Result has 558 places, 699 transitions, 11917 flow [2024-06-04 16:14:55,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11639, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11917, PETRI_PLACES=558, PETRI_TRANSITIONS=699} [2024-06-04 16:14:55,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 515 predicate places. [2024-06-04 16:14:55,220 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 699 transitions, 11917 flow [2024-06-04 16:14:55,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:55,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:55,221 INFO 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] [2024-06-04 16:14:55,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-04 16:14:55,221 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:55,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:55,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1758203340, now seen corresponding path program 7 times [2024-06-04 16:14:55,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:55,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790561945] [2024-06-04 16:14:55,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:55,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:55,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:55,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790561945] [2024-06-04 16:14:55,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790561945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:55,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:55,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:55,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487749131] [2024-06-04 16:14:55,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:55,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:55,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:55,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:55,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:55,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:55,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 699 transitions, 11917 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:55,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:55,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:55,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:57,480 INFO L124 PetriNetUnfolderBase]: 3718/6323 cut-off events. [2024-06-04 16:14:57,481 INFO L125 PetriNetUnfolderBase]: For 1082813/1082816 co-relation queries the response was YES. [2024-06-04 16:14:57,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55317 conditions, 6323 events. 3718/6323 cut-off events. For 1082813/1082816 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 44530 event pairs, 668 based on Foata normal form. 2/6315 useless extension candidates. Maximal degree in co-relation 55076. Up to 5318 conditions per place. [2024-06-04 16:14:57,586 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 547 selfloop transitions, 194 changer transitions 0/748 dead transitions. [2024-06-04 16:14:57,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 748 transitions, 13937 flow [2024-06-04 16:14:57,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:14:57,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:14:57,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 264 transitions. [2024-06-04 16:14:57,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:14:57,587 INFO L175 Difference]: Start difference. First operand has 558 places, 699 transitions, 11917 flow. Second operand 11 states and 264 transitions. [2024-06-04 16:14:57,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 748 transitions, 13937 flow Killed by 15