./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe023_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/safe023_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/safe023_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe023_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 16:14:19,661 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 16:14:19,732 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 16:14:19,735 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 16:14:19,736 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 16:14:19,758 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 16:14:19,759 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 16:14:19,759 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 16:14:19,760 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 16:14:19,763 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 16:14:19,764 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 16:14:19,764 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 16:14:19,765 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 16:14:19,765 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 16:14:19,766 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 16:14:19,766 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 16:14:19,766 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 16:14:19,766 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 16:14:19,767 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 16:14:19,767 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 16:14:19,767 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 16:14:19,767 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 16:14:19,767 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 16:14:19,768 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 16:14:19,768 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 16:14:19,768 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 16:14:19,768 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 16:14:19,768 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 16:14:19,769 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 16:14:19,769 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 16:14:19,770 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 16:14:19,770 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 16:14:19,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:14:19,770 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 16:14:19,771 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 16:14:19,771 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 16:14:19,771 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 16:14:19,771 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 16:14:19,771 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 16:14:19,771 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 16:14:19,772 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 16:14:19,772 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 16:14:19,772 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 16:14:19,772 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 16:14:19,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 16:14:19,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 16:14:20,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 16:14:20,002 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 16:14:20,007 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 16:14:20,008 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.i [2024-06-04 16:14:21,105 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 16:14:21,375 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 16:14:21,376 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe023_tso.i [2024-06-04 16:14:21,388 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb16ae9f8/fff2b11ca48b47afb2185501ec85b7ee/FLAG89c404b7d [2024-06-04 16:14:21,400 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb16ae9f8/fff2b11ca48b47afb2185501ec85b7ee [2024-06-04 16:14:21,402 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 16:14:21,403 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 16:14:21,403 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe023_tso.yml/witness.yml [2024-06-04 16:14:21,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 16:14:21,553 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 16:14:21,555 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 16:14:21,555 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 16:14:21,559 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 16:14:21,560 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:14:21" (1/2) ... [2024-06-04 16:14:21,561 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@300f2720 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:14:21, skipping insertion in model container [2024-06-04 16:14:21,561 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:14:21" (1/2) ... [2024-06-04 16:14:21,563 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@15e7c808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:14:21, skipping insertion in model container [2024-06-04 16:14:21,563 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:14:21" (2/2) ... [2024-06-04 16:14:21,566 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@300f2720 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:21, skipping insertion in model container [2024-06-04 16:14:21,566 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:14:21" (2/2) ... [2024-06-04 16:14:21,567 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 16:14:21,615 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 16:14:21,617 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! 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))) && (! multithreaded || (((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 127) && x <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_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 16:14:21,617 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! 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))) && (! multithreaded || (((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 127) && x <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_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 16:14:21,617 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! 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))) && (! multithreaded || (((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 127) && x <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_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 16:14:21,617 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 16:14:21,617 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-04 16:14:21,682 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 16:14:21,995 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:14:22,003 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 16:14:22,170 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:14:22,223 INFO L206 MainTranslator]: Completed translation [2024-06-04 16:14:22,223 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:22 WrapperNode [2024-06-04 16:14:22,224 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 16:14:22,225 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 16:14:22,225 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 16:14:22,225 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 16:14:22,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:22" (1/1) ... [2024-06-04 16:14:22,265 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:22" (1/1) ... [2024-06-04 16:14:22,301 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-04 16:14:22,303 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 16:14:22,303 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 16:14:22,304 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 16:14:22,304 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 16:14:22,314 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:22" (1/1) ... [2024-06-04 16:14:22,314 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:22" (1/1) ... [2024-06-04 16:14:22,326 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:22" (1/1) ... [2024-06-04 16:14:22,345 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 16:14:22,345 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:22" (1/1) ... [2024-06-04 16:14:22,346 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:22" (1/1) ... [2024-06-04 16:14:22,357 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:22" (1/1) ... [2024-06-04 16:14:22,359 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:22" (1/1) ... [2024-06-04 16:14:22,362 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:22" (1/1) ... [2024-06-04 16:14:22,364 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:22" (1/1) ... [2024-06-04 16:14:22,368 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 16:14:22,370 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 16:14:22,370 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 16:14:22,370 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 16:14:22,371 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:22" (1/1) ... [2024-06-04 16:14:22,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:14:22,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:14:22,409 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 16:14:22,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 16:14:22,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 16:14:22,439 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 16:14:22,439 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 16:14:22,439 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 16:14:22,439 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 16:14:22,439 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 16:14:22,439 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 16:14:22,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 16:14:22,440 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 16:14:22,418 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 16:14:22,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 16:14:22,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 16:14:22,442 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 16:14:22,546 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 16:14:22,547 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 16:14:22,797 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 16:14:22,798 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 16:14:22,898 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 16:14:22,901 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 16:14:22,902 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:14:22 BoogieIcfgContainer [2024-06-04 16:14:22,902 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 16:14:22,903 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 16:14:22,905 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 16:14:22,907 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 16:14:22,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 04:14:21" (1/4) ... [2024-06-04 16:14:22,908 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@995b641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:14:22, skipping insertion in model container [2024-06-04 16:14:22,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:14:21" (2/4) ... [2024-06-04 16:14:22,908 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@995b641 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:14:22, skipping insertion in model container [2024-06-04 16:14:22,909 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:22" (3/4) ... [2024-06-04 16:14:22,909 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@995b641 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:14:22, skipping insertion in model container [2024-06-04 16:14:22,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:14:22" (4/4) ... [2024-06-04 16:14:22,911 INFO L112 eAbstractionObserver]: Analyzing ICFG safe023_tso.i [2024-06-04 16:14:22,925 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 16:14:22,926 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 16:14:22,926 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 16:14:22,980 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 16:14:23,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 16:14:23,042 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-04 16:14:23,042 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:14:23,045 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 16:14:23,045 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 16:14:23,048 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-04 16:14:23,058 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 16:14:23,063 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;@4eb0b1b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 16:14:23,063 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 16:14:23,066 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 16:14:23,067 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 16:14:23,067 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:14:23,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:23,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 16:14:23,068 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 16:14:23,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:23,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1787024188, now seen corresponding path program 1 times [2024-06-04 16:14:23,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:23,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529781869] [2024-06-04 16:14:23,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:23,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:23,666 INFO 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 16:14:23,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:23,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529781869] [2024-06-04 16:14:23,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529781869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:23,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:23,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 16:14:23,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192395693] [2024-06-04 16:14:23,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:23,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 16:14:23,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:23,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 16:14:23,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 16:14:23,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-04 16:14:23,743 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 16:14:23,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:23,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-04 16:14:23,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:23,953 INFO L124 PetriNetUnfolderBase]: 470/795 cut-off events. [2024-06-04 16:14:23,953 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-04 16:14:23,959 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 16:14:23,964 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 29 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-04 16:14:23,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 167 flow [2024-06-04 16:14:23,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 16:14:23,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 16:14:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-06-04 16:14:23,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2024-06-04 16:14:23,975 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 87 transitions. [2024-06-04 16:14:23,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 167 flow [2024-06-04 16:14:23,978 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 16:14:23,981 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-04 16:14:23,983 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 16:14:23,986 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-04 16:14:23,989 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-04 16:14:23,990 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 16:14:23,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:23,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:23,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 16:14:23,991 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 16:14:23,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:23,992 INFO L85 PathProgramCache]: Analyzing trace with hash 656708195, now seen corresponding path program 1 times [2024-06-04 16:14:23,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:23,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187445559] [2024-06-04 16:14:23,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:23,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:24,198 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 16:14:24,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:24,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187445559] [2024-06-04 16:14:24,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187445559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:24,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:24,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:14:24,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669924258] [2024-06-04 16:14:24,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:24,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:14:24,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:24,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:14:24,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:14:24,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:14:24,234 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 16:14:24,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:24,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:14:24,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:24,365 INFO L124 PetriNetUnfolderBase]: 781/1325 cut-off events. [2024-06-04 16:14:24,365 INFO L125 PetriNetUnfolderBase]: For 253/253 co-relation queries the response was YES. [2024-06-04 16:14:24,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2969 conditions, 1325 events. 781/1325 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6749 event pairs, 376 based on Foata normal form. 5/1321 useless extension candidates. Maximal degree in co-relation 2954. Up to 1146 conditions per place. [2024-06-04 16:14:24,373 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 44 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-06-04 16:14:24,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 62 transitions, 284 flow [2024-06-04 16:14:24,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:14:24,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:14:24,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-06-04 16:14:24,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6726190476190477 [2024-06-04 16:14:24,377 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 113 transitions. [2024-06-04 16:14:24,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 62 transitions, 284 flow [2024-06-04 16:14:24,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 16:14:24,381 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 173 flow [2024-06-04 16:14:24,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-06-04 16:14:24,382 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-04 16:14:24,382 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 173 flow [2024-06-04 16:14:24,383 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 16:14:24,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:24,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:24,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 16:14:24,385 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:24,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:24,388 INFO L85 PathProgramCache]: Analyzing trace with hash -263580670, now seen corresponding path program 1 times [2024-06-04 16:14:24,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:24,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146615011] [2024-06-04 16:14:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:24,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:24,640 INFO 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 16:14:24,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:24,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146615011] [2024-06-04 16:14:24,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146615011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:24,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:24,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:14:24,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065730387] [2024-06-04 16:14:24,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:24,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:14:24,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:24,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:14:24,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:14:24,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:14:24,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 173 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:24,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:24,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:14:24,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:24,879 INFO L124 PetriNetUnfolderBase]: 789/1357 cut-off events. [2024-06-04 16:14:24,879 INFO L125 PetriNetUnfolderBase]: For 893/934 co-relation queries the response was YES. [2024-06-04 16:14:24,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3596 conditions, 1357 events. 789/1357 cut-off events. For 893/934 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7079 event pairs, 265 based on Foata normal form. 15/1360 useless extension candidates. Maximal degree in co-relation 3578. Up to 1114 conditions per place. [2024-06-04 16:14:24,885 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 52 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-04 16:14:24,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 405 flow [2024-06-04 16:14:24,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:14:24,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:14:24,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-04 16:14:24,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-04 16:14:24,888 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 173 flow. Second operand 5 states and 140 transitions. [2024-06-04 16:14:24,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 405 flow [2024-06-04 16:14:24,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 76 transitions, 403 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-04 16:14:24,890 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 248 flow [2024-06-04 16:14:24,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2024-06-04 16:14:24,891 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-04 16:14:24,891 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 248 flow [2024-06-04 16:14:24,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:24,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:24,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:24,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 16:14:24,892 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:24,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:24,893 INFO L85 PathProgramCache]: Analyzing trace with hash -364981210, now seen corresponding path program 1 times [2024-06-04 16:14:24,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:24,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953849937] [2024-06-04 16:14:24,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:24,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:25,132 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 16:14:25,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:25,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953849937] [2024-06-04 16:14:25,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953849937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:25,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:25,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:14:25,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77461002] [2024-06-04 16:14:25,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:25,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:14:25,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:25,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:14:25,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:14:25,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:14:25,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 248 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:25,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:25,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:14:25,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:25,290 INFO L124 PetriNetUnfolderBase]: 773/1297 cut-off events. [2024-06-04 16:14:25,291 INFO L125 PetriNetUnfolderBase]: For 1645/1660 co-relation queries the response was YES. [2024-06-04 16:14:25,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3948 conditions, 1297 events. 773/1297 cut-off events. For 1645/1660 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6615 event pairs, 312 based on Foata normal form. 15/1305 useless extension candidates. Maximal degree in co-relation 3927. Up to 1140 conditions per place. [2024-06-04 16:14:25,298 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-06-04 16:14:25,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 65 transitions, 401 flow [2024-06-04 16:14:25,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:14:25,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:14:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-04 16:14:25,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2024-06-04 16:14:25,300 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 248 flow. Second operand 4 states and 107 transitions. [2024-06-04 16:14:25,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 65 transitions, 401 flow [2024-06-04 16:14:25,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 387 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-04 16:14:25,303 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 287 flow [2024-06-04 16:14:25,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=287, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-06-04 16:14:25,303 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-04 16:14:25,303 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 287 flow [2024-06-04 16:14:25,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:25,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:25,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:25,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 16:14:25,304 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:25,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:25,305 INFO L85 PathProgramCache]: Analyzing trace with hash -848364989, now seen corresponding path program 1 times [2024-06-04 16:14:25,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:25,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325752777] [2024-06-04 16:14:25,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:25,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:25,501 INFO 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 16:14:25,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:25,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325752777] [2024-06-04 16:14:25,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325752777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:25,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:25,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:14:25,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715591446] [2024-06-04 16:14:25,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:25,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:14:25,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:25,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:14:25,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:14:25,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:14:25,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 287 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 16:14:25,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:25,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:14:25,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:25,739 INFO L124 PetriNetUnfolderBase]: 781/1330 cut-off events. [2024-06-04 16:14:25,739 INFO L125 PetriNetUnfolderBase]: For 2266/2340 co-relation queries the response was YES. [2024-06-04 16:14:25,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4191 conditions, 1330 events. 781/1330 cut-off events. For 2266/2340 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6821 event pairs, 210 based on Foata normal form. 30/1350 useless extension candidates. Maximal degree in co-relation 4166. Up to 1064 conditions per place. [2024-06-04 16:14:25,748 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 56 selfloop transitions, 20 changer transitions 0/84 dead transitions. [2024-06-04 16:14:25,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 84 transitions, 537 flow [2024-06-04 16:14:25,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:14:25,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:14:25,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-04 16:14:25,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-04 16:14:25,751 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 287 flow. Second operand 6 states and 162 transitions. [2024-06-04 16:14:25,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 84 transitions, 537 flow [2024-06-04 16:14:25,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 84 transitions, 527 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-04 16:14:25,758 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 343 flow [2024-06-04 16:14:25,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=343, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-04 16:14:25,760 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-04 16:14:25,760 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 343 flow [2024-06-04 16:14:25,761 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 16:14:25,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:25,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:25,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 16:14:25,762 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 16:14:25,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:25,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1570485163, now seen corresponding path program 1 times [2024-06-04 16:14:25,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:25,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938872093] [2024-06-04 16:14:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:25,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:26,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:26,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938872093] [2024-06-04 16:14:26,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938872093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:26,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:26,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:14:26,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054183973] [2024-06-04 16:14:26,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:26,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:14:26,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:26,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:14:26,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:14:26,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:26,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 343 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 16:14:26,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:26,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:26,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:26,290 INFO L124 PetriNetUnfolderBase]: 955/1562 cut-off events. [2024-06-04 16:14:26,290 INFO L125 PetriNetUnfolderBase]: For 3564/3564 co-relation queries the response was YES. [2024-06-04 16:14:26,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5352 conditions, 1562 events. 955/1562 cut-off events. For 3564/3564 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7919 event pairs, 342 based on Foata normal form. 4/1558 useless extension candidates. Maximal degree in co-relation 5325. Up to 1371 conditions per place. [2024-06-04 16:14:26,299 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 67 selfloop transitions, 15 changer transitions 0/89 dead transitions. [2024-06-04 16:14:26,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 89 transitions, 677 flow [2024-06-04 16:14:26,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:14:26,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:14:26,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-04 16:14:26,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-04 16:14:26,301 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 343 flow. Second operand 5 states and 128 transitions. [2024-06-04 16:14:26,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 89 transitions, 677 flow [2024-06-04 16:14:26,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 89 transitions, 615 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 16:14:26,307 INFO L231 Difference]: Finished difference. Result has 63 places, 70 transitions, 446 flow [2024-06-04 16:14:26,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=446, PETRI_PLACES=63, PETRI_TRANSITIONS=70} [2024-06-04 16:14:26,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-04 16:14:26,309 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 70 transitions, 446 flow [2024-06-04 16:14:26,309 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 16:14:26,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:26,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:26,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 16:14:26,310 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 16:14:26,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:26,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1727404290, now seen corresponding path program 1 times [2024-06-04 16:14:26,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:26,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75154266] [2024-06-04 16:14:26,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:26,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:26,610 INFO 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 16:14:26,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:26,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75154266] [2024-06-04 16:14:26,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75154266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:26,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:26,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:14:26,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804071703] [2024-06-04 16:14:26,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:26,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:14:26,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:26,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:14:26,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:14:26,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:26,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 70 transitions, 446 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:26,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:26,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:26,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:26,802 INFO L124 PetriNetUnfolderBase]: 966/1590 cut-off events. [2024-06-04 16:14:26,802 INFO L125 PetriNetUnfolderBase]: For 4475/4481 co-relation queries the response was YES. [2024-06-04 16:14:26,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5799 conditions, 1590 events. 966/1590 cut-off events. For 4475/4481 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8096 event pairs, 346 based on Foata normal form. 6/1588 useless extension candidates. Maximal degree in co-relation 5769. Up to 1383 conditions per place. [2024-06-04 16:14:26,812 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 69 selfloop transitions, 17 changer transitions 0/93 dead transitions. [2024-06-04 16:14:26,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 723 flow [2024-06-04 16:14:26,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:14:26,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:14:26,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-04 16:14:26,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 16:14:26,814 INFO L175 Difference]: Start difference. First operand has 63 places, 70 transitions, 446 flow. Second operand 5 states and 126 transitions. [2024-06-04 16:14:26,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 723 flow [2024-06-04 16:14:26,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 717 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-04 16:14:26,819 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 521 flow [2024-06-04 16:14:26,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=521, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2024-06-04 16:14:26,820 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-04 16:14:26,820 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 521 flow [2024-06-04 16:14:26,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:26,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:26,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:26,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 16:14:26,821 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 16:14:26,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:26,821 INFO L85 PathProgramCache]: Analyzing trace with hash -761795358, now seen corresponding path program 2 times [2024-06-04 16:14:26,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:26,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665885587] [2024-06-04 16:14:26,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:26,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:27,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:27,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665885587] [2024-06-04 16:14:27,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665885587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:27,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:27,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:14:27,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987597509] [2024-06-04 16:14:27,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:27,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:14:27,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:27,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:14:27,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:14:27,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:27,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 521 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:27,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:27,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:27,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:27,263 INFO L124 PetriNetUnfolderBase]: 961/1587 cut-off events. [2024-06-04 16:14:27,264 INFO L125 PetriNetUnfolderBase]: For 5423/5429 co-relation queries the response was YES. [2024-06-04 16:14:27,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6026 conditions, 1587 events. 961/1587 cut-off events. For 5423/5429 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8071 event pairs, 343 based on Foata normal form. 2/1582 useless extension candidates. Maximal degree in co-relation 5992. Up to 1378 conditions per place. [2024-06-04 16:14:27,273 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 68 selfloop transitions, 20 changer transitions 0/95 dead transitions. [2024-06-04 16:14:27,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 95 transitions, 760 flow [2024-06-04 16:14:27,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:14:27,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:14:27,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-04 16:14:27,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-04 16:14:27,275 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 521 flow. Second operand 5 states and 129 transitions. [2024-06-04 16:14:27,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 95 transitions, 760 flow [2024-06-04 16:14:27,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 95 transitions, 741 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-04 16:14:27,281 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 580 flow [2024-06-04 16:14:27,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=580, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-06-04 16:14:27,281 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-04 16:14:27,281 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 580 flow [2024-06-04 16:14:27,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:27,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:27,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:27,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 16:14:27,282 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 16:14:27,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:27,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1702746890, now seen corresponding path program 1 times [2024-06-04 16:14:27,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:27,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031072962] [2024-06-04 16:14:27,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:27,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:27,506 INFO 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 16:14:27,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:27,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031072962] [2024-06-04 16:14:27,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031072962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:27,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:27,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:14:27,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652265443] [2024-06-04 16:14:27,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:27,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:14:27,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:27,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:14:27,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:14:27,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:27,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 580 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 16:14:27,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:27,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:27,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:27,765 INFO L124 PetriNetUnfolderBase]: 970/1591 cut-off events. [2024-06-04 16:14:27,765 INFO L125 PetriNetUnfolderBase]: For 6620/6620 co-relation queries the response was YES. [2024-06-04 16:14:27,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6234 conditions, 1591 events. 970/1591 cut-off events. For 6620/6620 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8073 event pairs, 316 based on Foata normal form. 8/1591 useless extension candidates. Maximal degree in co-relation 6197. Up to 1357 conditions per place. [2024-06-04 16:14:27,777 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 70 selfloop transitions, 23 changer transitions 0/100 dead transitions. [2024-06-04 16:14:27,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 100 transitions, 834 flow [2024-06-04 16:14:27,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:14:27,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:14:27,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 16:14:27,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 16:14:27,781 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 580 flow. Second operand 6 states and 148 transitions. [2024-06-04 16:14:27,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 100 transitions, 834 flow [2024-06-04 16:14:27,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 100 transitions, 810 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-04 16:14:27,789 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 634 flow [2024-06-04 16:14:27,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=634, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2024-06-04 16:14:27,791 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-04 16:14:27,791 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 634 flow [2024-06-04 16:14:27,791 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 16:14:27,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:27,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:27,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 16:14:27,791 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 16:14:27,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:27,792 INFO L85 PathProgramCache]: Analyzing trace with hash -512207174, now seen corresponding path program 1 times [2024-06-04 16:14:27,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:27,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858754125] [2024-06-04 16:14:27,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:27,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:28,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:28,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858754125] [2024-06-04 16:14:28,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858754125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:28,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:28,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:14:28,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714635855] [2024-06-04 16:14:28,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:28,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:14:28,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:28,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:14:28,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:14:28,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:14:28,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 634 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:28,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:28,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:14:28,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:28,358 INFO L124 PetriNetUnfolderBase]: 925/1553 cut-off events. [2024-06-04 16:14:28,359 INFO L125 PetriNetUnfolderBase]: For 8783/8816 co-relation queries the response was YES. [2024-06-04 16:14:28,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6490 conditions, 1553 events. 925/1553 cut-off events. For 8783/8816 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8064 event pairs, 282 based on Foata normal form. 33/1535 useless extension candidates. Maximal degree in co-relation 6451. Up to 1281 conditions per place. [2024-06-04 16:14:28,371 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 68 selfloop transitions, 25 changer transitions 0/108 dead transitions. [2024-06-04 16:14:28,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 108 transitions, 900 flow [2024-06-04 16:14:28,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:14:28,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:14:28,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-04 16:14:28,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-04 16:14:28,373 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 634 flow. Second operand 6 states and 157 transitions. [2024-06-04 16:14:28,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 108 transitions, 900 flow [2024-06-04 16:14:28,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 108 transitions, 846 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 16:14:28,381 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 660 flow [2024-06-04 16:14:28,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=660, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2024-06-04 16:14:28,382 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-04 16:14:28,382 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 660 flow [2024-06-04 16:14:28,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:28,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:28,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:28,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 16:14:28,383 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 16:14:28,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:28,383 INFO L85 PathProgramCache]: Analyzing trace with hash 727180166, now seen corresponding path program 2 times [2024-06-04 16:14:28,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:28,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811287678] [2024-06-04 16:14:28,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:28,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:28,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:28,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811287678] [2024-06-04 16:14:28,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811287678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:28,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:28,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:14:28,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785595839] [2024-06-04 16:14:28,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:28,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:14:28,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:28,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:14:28,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:14:28,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:14:28,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 660 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:28,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:28,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:14:28,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:28,875 INFO L124 PetriNetUnfolderBase]: 917/1534 cut-off events. [2024-06-04 16:14:28,876 INFO L125 PetriNetUnfolderBase]: For 9738/9777 co-relation queries the response was YES. [2024-06-04 16:14:28,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6532 conditions, 1534 events. 917/1534 cut-off events. For 9738/9777 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7966 event pairs, 284 based on Foata normal form. 40/1521 useless extension candidates. Maximal degree in co-relation 6492. Up to 1258 conditions per place. [2024-06-04 16:14:28,891 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 66 selfloop transitions, 28 changer transitions 0/109 dead transitions. [2024-06-04 16:14:28,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 109 transitions, 914 flow [2024-06-04 16:14:28,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:14:28,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:14:28,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 16:14:28,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-04 16:14:28,893 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 660 flow. Second operand 7 states and 176 transitions. [2024-06-04 16:14:28,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 109 transitions, 914 flow [2024-06-04 16:14:28,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 109 transitions, 864 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 16:14:28,903 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 675 flow [2024-06-04 16:14:28,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=675, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2024-06-04 16:14:28,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-04 16:14:28,903 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 675 flow [2024-06-04 16:14:28,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:28,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:28,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:28,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 16:14:28,904 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 16:14:28,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:28,905 INFO L85 PathProgramCache]: Analyzing trace with hash 608205135, now seen corresponding path program 1 times [2024-06-04 16:14:28,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:28,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264316739] [2024-06-04 16:14:28,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:28,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:29,182 INFO 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 16:14:29,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:29,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264316739] [2024-06-04 16:14:29,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264316739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:29,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:29,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:14:29,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455293928] [2024-06-04 16:14:29,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:29,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:14:29,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:29,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:14:29,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:14:29,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:29,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 675 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 16:14:29,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:29,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:29,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:29,512 INFO L124 PetriNetUnfolderBase]: 1005/1663 cut-off events. [2024-06-04 16:14:29,512 INFO L125 PetriNetUnfolderBase]: For 10565/10571 co-relation queries the response was YES. [2024-06-04 16:14:29,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7022 conditions, 1663 events. 1005/1663 cut-off events. For 10565/10571 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8528 event pairs, 315 based on Foata normal form. 2/1658 useless extension candidates. Maximal degree in co-relation 6981. Up to 1381 conditions per place. [2024-06-04 16:14:29,523 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 89 selfloop transitions, 30 changer transitions 0/126 dead transitions. [2024-06-04 16:14:29,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 126 transitions, 1110 flow [2024-06-04 16:14:29,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:14:29,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:14:29,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-04 16:14:29,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-04 16:14:29,525 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 675 flow. Second operand 7 states and 178 transitions. [2024-06-04 16:14:29,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 126 transitions, 1110 flow [2024-06-04 16:14:29,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 126 transitions, 1018 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-04 16:14:29,536 INFO L231 Difference]: Finished difference. Result has 86 places, 94 transitions, 747 flow [2024-06-04 16:14:29,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=747, PETRI_PLACES=86, PETRI_TRANSITIONS=94} [2024-06-04 16:14:29,537 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-04 16:14:29,537 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 94 transitions, 747 flow [2024-06-04 16:14:29,538 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 16:14:29,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:29,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:29,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 16:14:29,539 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 16:14:29,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:29,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1067956841, now seen corresponding path program 2 times [2024-06-04 16:14:29,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:29,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667282779] [2024-06-04 16:14:29,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:29,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:29,780 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 16:14:29,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:29,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667282779] [2024-06-04 16:14:29,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667282779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:29,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:29,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:14:29,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643021115] [2024-06-04 16:14:29,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:29,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:14:29,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:29,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:14:29,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:14:29,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:29,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 94 transitions, 747 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 16:14:29,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:29,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:29,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:30,083 INFO L124 PetriNetUnfolderBase]: 1016/1671 cut-off events. [2024-06-04 16:14:30,083 INFO L125 PetriNetUnfolderBase]: For 12073/12073 co-relation queries the response was YES. [2024-06-04 16:14:30,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7455 conditions, 1671 events. 1016/1671 cut-off events. For 12073/12073 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8541 event pairs, 312 based on Foata normal form. 2/1665 useless extension candidates. Maximal degree in co-relation 7412. Up to 1368 conditions per place. [2024-06-04 16:14:30,095 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 95 selfloop transitions, 40 changer transitions 0/142 dead transitions. [2024-06-04 16:14:30,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 142 transitions, 1270 flow [2024-06-04 16:14:30,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:14:30,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:14:30,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-04 16:14:30,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-04 16:14:30,097 INFO L175 Difference]: Start difference. First operand has 86 places, 94 transitions, 747 flow. Second operand 9 states and 219 transitions. [2024-06-04 16:14:30,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 142 transitions, 1270 flow [2024-06-04 16:14:30,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 142 transitions, 1231 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-04 16:14:30,115 INFO L231 Difference]: Finished difference. Result has 94 places, 103 transitions, 872 flow [2024-06-04 16:14:30,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=872, PETRI_PLACES=94, PETRI_TRANSITIONS=103} [2024-06-04 16:14:30,116 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-04 16:14:30,116 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 103 transitions, 872 flow [2024-06-04 16:14:30,116 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 16:14:30,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:30,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:30,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 16:14:30,117 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 16:14:30,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:30,117 INFO L85 PathProgramCache]: Analyzing trace with hash 755814735, now seen corresponding path program 3 times [2024-06-04 16:14:30,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:30,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250177026] [2024-06-04 16:14:30,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:30,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:30,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:30,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250177026] [2024-06-04 16:14:30,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250177026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:30,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:30,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:14:30,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675928886] [2024-06-04 16:14:30,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:30,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:14:30,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:30,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:14:30,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:14:30,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:30,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 103 transitions, 872 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 16:14:30,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:30,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:30,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:30,615 INFO L124 PetriNetUnfolderBase]: 1011/1664 cut-off events. [2024-06-04 16:14:30,615 INFO L125 PetriNetUnfolderBase]: For 13939/13939 co-relation queries the response was YES. [2024-06-04 16:14:30,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7897 conditions, 1664 events. 1011/1664 cut-off events. For 13939/13939 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8506 event pairs, 312 based on Foata normal form. 2/1658 useless extension candidates. Maximal degree in co-relation 7851. Up to 1363 conditions per place. [2024-06-04 16:14:30,627 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 91 selfloop transitions, 38 changer transitions 0/136 dead transitions. [2024-06-04 16:14:30,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 136 transitions, 1267 flow [2024-06-04 16:14:30,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:14:30,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:14:30,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-04 16:14:30,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-04 16:14:30,628 INFO L175 Difference]: Start difference. First operand has 94 places, 103 transitions, 872 flow. Second operand 8 states and 198 transitions. [2024-06-04 16:14:30,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 136 transitions, 1267 flow [2024-06-04 16:14:30,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 136 transitions, 1202 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 16:14:30,644 INFO L231 Difference]: Finished difference. Result has 98 places, 103 transitions, 891 flow [2024-06-04 16:14:30,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=891, PETRI_PLACES=98, PETRI_TRANSITIONS=103} [2024-06-04 16:14:30,645 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-04 16:14:30,645 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 103 transitions, 891 flow [2024-06-04 16:14:30,646 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 16:14:30,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:30,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:30,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 16:14:30,646 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:30,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:30,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1396806331, now seen corresponding path program 4 times [2024-06-04 16:14:30,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:30,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410435326] [2024-06-04 16:14:30,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:30,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:30,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:30,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410435326] [2024-06-04 16:14:30,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410435326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:30,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:30,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:14:30,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730246541] [2024-06-04 16:14:30,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:30,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:14:30,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:30,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:14:30,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:14:30,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:30,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 103 transitions, 891 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 16:14:30,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:30,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:30,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:31,138 INFO L124 PetriNetUnfolderBase]: 1022/1696 cut-off events. [2024-06-04 16:14:31,138 INFO L125 PetriNetUnfolderBase]: For 15255/15261 co-relation queries the response was YES. [2024-06-04 16:14:31,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8035 conditions, 1696 events. 1022/1696 cut-off events. For 15255/15261 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8770 event pairs, 309 based on Foata normal form. 2/1691 useless extension candidates. Maximal degree in co-relation 7987. Up to 1375 conditions per place. [2024-06-04 16:14:31,149 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 90 selfloop transitions, 41 changer transitions 0/138 dead transitions. [2024-06-04 16:14:31,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 138 transitions, 1320 flow [2024-06-04 16:14:31,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:14:31,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:14:31,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-04 16:14:31,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-04 16:14:31,151 INFO L175 Difference]: Start difference. First operand has 98 places, 103 transitions, 891 flow. Second operand 7 states and 179 transitions. [2024-06-04 16:14:31,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 138 transitions, 1320 flow [2024-06-04 16:14:31,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 138 transitions, 1210 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 16:14:31,167 INFO L231 Difference]: Finished difference. Result has 99 places, 107 transitions, 915 flow [2024-06-04 16:14:31,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=915, PETRI_PLACES=99, PETRI_TRANSITIONS=107} [2024-06-04 16:14:31,169 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-04 16:14:31,169 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 107 transitions, 915 flow [2024-06-04 16:14:31,169 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 16:14:31,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:31,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:31,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 16:14:31,170 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 16:14:31,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:31,170 INFO L85 PathProgramCache]: Analyzing trace with hash -52293399, now seen corresponding path program 5 times [2024-06-04 16:14:31,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:31,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498185037] [2024-06-04 16:14:31,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:31,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:31,389 INFO 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 16:14:31,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:31,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498185037] [2024-06-04 16:14:31,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498185037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:31,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:31,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:14:31,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548259957] [2024-06-04 16:14:31,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:31,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:14:31,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:31,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:14:31,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:14:31,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:31,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 107 transitions, 915 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 16:14:31,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:31,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:31,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:31,654 INFO L124 PetriNetUnfolderBase]: 1033/1713 cut-off events. [2024-06-04 16:14:31,654 INFO L125 PetriNetUnfolderBase]: For 17329/17335 co-relation queries the response was YES. [2024-06-04 16:14:31,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8182 conditions, 1713 events. 1033/1713 cut-off events. For 17329/17335 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8876 event pairs, 312 based on Foata normal form. 6/1711 useless extension candidates. Maximal degree in co-relation 8133. Up to 1387 conditions per place. [2024-06-04 16:14:31,666 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 91 selfloop transitions, 45 changer transitions 0/143 dead transitions. [2024-06-04 16:14:31,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 143 transitions, 1365 flow [2024-06-04 16:14:31,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:14:31,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:14:31,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-04 16:14:31,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-04 16:14:31,668 INFO L175 Difference]: Start difference. First operand has 99 places, 107 transitions, 915 flow. Second operand 8 states and 193 transitions. [2024-06-04 16:14:31,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 143 transitions, 1365 flow [2024-06-04 16:14:31,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 143 transitions, 1273 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 16:14:31,688 INFO L231 Difference]: Finished difference. Result has 102 places, 111 transitions, 959 flow [2024-06-04 16:14:31,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=959, PETRI_PLACES=102, PETRI_TRANSITIONS=111} [2024-06-04 16:14:31,689 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-04 16:14:31,689 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 111 transitions, 959 flow [2024-06-04 16:14:31,690 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 16:14:31,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:31,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:31,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 16:14:31,690 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 16:14:31,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:31,691 INFO L85 PathProgramCache]: Analyzing trace with hash -2028921553, now seen corresponding path program 6 times [2024-06-04 16:14:31,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:31,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221415130] [2024-06-04 16:14:31,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:31,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:31,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:31,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221415130] [2024-06-04 16:14:31,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221415130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:31,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:31,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:14:31,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252974997] [2024-06-04 16:14:31,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:31,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:14:31,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:31,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:14:31,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:14:31,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:31,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 111 transitions, 959 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 16:14:31,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:31,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:31,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:32,172 INFO L124 PetriNetUnfolderBase]: 1028/1710 cut-off events. [2024-06-04 16:14:32,172 INFO L125 PetriNetUnfolderBase]: For 18671/18677 co-relation queries the response was YES. [2024-06-04 16:14:32,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8247 conditions, 1710 events. 1028/1710 cut-off events. For 18671/18677 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8855 event pairs, 309 based on Foata normal form. 2/1705 useless extension candidates. Maximal degree in co-relation 8197. Up to 1382 conditions per place. [2024-06-04 16:14:32,183 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 95 selfloop transitions, 46 changer transitions 0/148 dead transitions. [2024-06-04 16:14:32,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 148 transitions, 1335 flow [2024-06-04 16:14:32,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:14:32,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:14:32,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-04 16:14:32,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-04 16:14:32,184 INFO L175 Difference]: Start difference. First operand has 102 places, 111 transitions, 959 flow. Second operand 9 states and 219 transitions. [2024-06-04 16:14:32,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 148 transitions, 1335 flow [2024-06-04 16:14:32,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 148 transitions, 1270 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 16:14:32,204 INFO L231 Difference]: Finished difference. Result has 107 places, 111 transitions, 994 flow [2024-06-04 16:14:32,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=994, PETRI_PLACES=107, PETRI_TRANSITIONS=111} [2024-06-04 16:14:32,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-04 16:14:32,205 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 111 transitions, 994 flow [2024-06-04 16:14:32,205 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 16:14:32,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:32,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:32,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 16:14:32,206 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:32,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:32,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2028913617, now seen corresponding path program 1 times [2024-06-04 16:14:32,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:32,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766762260] [2024-06-04 16:14:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:32,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:32,413 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 16:14:32,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:32,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766762260] [2024-06-04 16:14:32,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766762260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:32,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:32,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:14:32,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042185041] [2024-06-04 16:14:32,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:32,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:14:32,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:32,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:14:32,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:14:32,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:32,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 111 transitions, 994 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 16:14:32,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:32,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:32,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:32,666 INFO L124 PetriNetUnfolderBase]: 1045/1737 cut-off events. [2024-06-04 16:14:32,666 INFO L125 PetriNetUnfolderBase]: For 21148/21154 co-relation queries the response was YES. [2024-06-04 16:14:32,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8508 conditions, 1737 events. 1045/1737 cut-off events. For 21148/21154 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8987 event pairs, 309 based on Foata normal form. 4/1734 useless extension candidates. Maximal degree in co-relation 8457. Up to 1487 conditions per place. [2024-06-04 16:14:32,677 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 107 selfloop transitions, 22 changer transitions 0/136 dead transitions. [2024-06-04 16:14:32,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 136 transitions, 1326 flow [2024-06-04 16:14:32,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:14:32,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:14:32,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-04 16:14:32,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 16:14:32,678 INFO L175 Difference]: Start difference. First operand has 107 places, 111 transitions, 994 flow. Second operand 6 states and 150 transitions. [2024-06-04 16:14:32,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 136 transitions, 1326 flow [2024-06-04 16:14:32,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 136 transitions, 1214 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:32,700 INFO L231 Difference]: Finished difference. Result has 105 places, 113 transitions, 953 flow [2024-06-04 16:14:32,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=953, PETRI_PLACES=105, PETRI_TRANSITIONS=113} [2024-06-04 16:14:32,700 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-04 16:14:32,700 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 113 transitions, 953 flow [2024-06-04 16:14:32,701 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 16:14:32,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:32,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:32,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 16:14:32,701 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 16:14:32,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:32,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1933722735, now seen corresponding path program 2 times [2024-06-04 16:14:32,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:32,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985959411] [2024-06-04 16:14:32,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:32,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:32,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:32,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985959411] [2024-06-04 16:14:32,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985959411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:32,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:32,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:14:32,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49070873] [2024-06-04 16:14:32,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:32,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:14:32,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:32,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:14:32,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:14:32,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:32,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 113 transitions, 953 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 16:14:32,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:32,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:32,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:33,168 INFO L124 PetriNetUnfolderBase]: 1062/1765 cut-off events. [2024-06-04 16:14:33,168 INFO L125 PetriNetUnfolderBase]: For 23440/23446 co-relation queries the response was YES. [2024-06-04 16:14:33,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8741 conditions, 1765 events. 1062/1765 cut-off events. For 23440/23446 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9214 event pairs, 317 based on Foata normal form. 8/1765 useless extension candidates. Maximal degree in co-relation 8689. Up to 1514 conditions per place. [2024-06-04 16:14:33,179 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 108 selfloop transitions, 20 changer transitions 0/135 dead transitions. [2024-06-04 16:14:33,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 135 transitions, 1279 flow [2024-06-04 16:14:33,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:14:33,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:14:33,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-04 16:14:33,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-04 16:14:33,181 INFO L175 Difference]: Start difference. First operand has 105 places, 113 transitions, 953 flow. Second operand 6 states and 145 transitions. [2024-06-04 16:14:33,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 135 transitions, 1279 flow [2024-06-04 16:14:33,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 135 transitions, 1226 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 16:14:33,203 INFO L231 Difference]: Finished difference. Result has 107 places, 115 transitions, 971 flow [2024-06-04 16:14:33,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=971, PETRI_PLACES=107, PETRI_TRANSITIONS=115} [2024-06-04 16:14:33,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-04 16:14:33,203 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 115 transitions, 971 flow [2024-06-04 16:14:33,204 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 16:14:33,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:33,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:33,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 16:14:33,204 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 16:14:33,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:33,205 INFO L85 PathProgramCache]: Analyzing trace with hash -42762263, now seen corresponding path program 3 times [2024-06-04 16:14:33,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:33,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87305203] [2024-06-04 16:14:33,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:33,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:33,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:33,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87305203] [2024-06-04 16:14:33,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87305203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:33,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:33,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:14:33,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273533331] [2024-06-04 16:14:33,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:33,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:14:33,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:33,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:14:33,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:14:33,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:33,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 115 transitions, 971 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 16:14:33,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:33,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:33,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:33,635 INFO L124 PetriNetUnfolderBase]: 1054/1752 cut-off events. [2024-06-04 16:14:33,635 INFO L125 PetriNetUnfolderBase]: For 25184/25190 co-relation queries the response was YES. [2024-06-04 16:14:33,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8807 conditions, 1752 events. 1054/1752 cut-off events. For 25184/25190 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9145 event pairs, 286 based on Foata normal form. 8/1752 useless extension candidates. Maximal degree in co-relation 8754. Up to 1425 conditions per place. [2024-06-04 16:14:33,649 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 105 selfloop transitions, 26 changer transitions 0/138 dead transitions. [2024-06-04 16:14:33,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 138 transitions, 1309 flow [2024-06-04 16:14:33,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:14:33,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:14:33,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 16:14:33,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-04 16:14:33,652 INFO L175 Difference]: Start difference. First operand has 107 places, 115 transitions, 971 flow. Second operand 6 states and 146 transitions. [2024-06-04 16:14:33,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 138 transitions, 1309 flow [2024-06-04 16:14:33,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 138 transitions, 1256 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 16:14:33,679 INFO L231 Difference]: Finished difference. Result has 109 places, 117 transitions, 1005 flow [2024-06-04 16:14:33,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1005, PETRI_PLACES=109, PETRI_TRANSITIONS=117} [2024-06-04 16:14:33,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-04 16:14:33,680 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 117 transitions, 1005 flow [2024-06-04 16:14:33,680 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 16:14:33,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:33,680 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 16:14:33,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 16:14:33,681 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 16:14:33,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:33,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1692425491, now seen corresponding path program 1 times [2024-06-04 16:14:33,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:33,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805492036] [2024-06-04 16:14:33,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:33,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:33,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:33,932 INFO 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 16:14:33,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:33,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805492036] [2024-06-04 16:14:33,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805492036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:33,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:33,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:14:33,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919248333] [2024-06-04 16:14:33,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:33,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:14:33,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:33,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:14:33,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:14:33,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:14:33,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 117 transitions, 1005 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:33,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:33,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:14:33,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:34,296 INFO L124 PetriNetUnfolderBase]: 1055/1778 cut-off events. [2024-06-04 16:14:34,297 INFO L125 PetriNetUnfolderBase]: For 30598/30632 co-relation queries the response was YES. [2024-06-04 16:14:34,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9298 conditions, 1778 events. 1055/1778 cut-off events. For 30598/30632 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9550 event pairs, 179 based on Foata normal form. 10/1730 useless extension candidates. Maximal degree in co-relation 9244. Up to 1353 conditions per place. [2024-06-04 16:14:34,312 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 94 selfloop transitions, 37 changer transitions 0/158 dead transitions. [2024-06-04 16:14:34,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 158 transitions, 1471 flow [2024-06-04 16:14:34,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:14:34,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:14:34,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-04 16:14:34,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-04 16:14:34,314 INFO L175 Difference]: Start difference. First operand has 109 places, 117 transitions, 1005 flow. Second operand 8 states and 204 transitions. [2024-06-04 16:14:34,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 158 transitions, 1471 flow [2024-06-04 16:14:34,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 158 transitions, 1402 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 16:14:34,341 INFO L231 Difference]: Finished difference. Result has 113 places, 121 transitions, 1053 flow [2024-06-04 16:14:34,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1053, PETRI_PLACES=113, PETRI_TRANSITIONS=121} [2024-06-04 16:14:34,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-04 16:14:34,341 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 121 transitions, 1053 flow [2024-06-04 16:14:34,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:34,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:34,342 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 16:14:34,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 16:14:34,342 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:34,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:34,342 INFO L85 PathProgramCache]: Analyzing trace with hash -785006771, now seen corresponding path program 2 times [2024-06-04 16:14:34,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:34,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012303265] [2024-06-04 16:14:34,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:34,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:34,588 INFO 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 16:14:34,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:34,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012303265] [2024-06-04 16:14:34,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012303265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:34,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:34,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:14:34,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291547087] [2024-06-04 16:14:34,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:34,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:14:34,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:34,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:14:34,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:14:34,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:14:34,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 121 transitions, 1053 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:34,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:34,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:14:34,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:34,916 INFO L124 PetriNetUnfolderBase]: 1043/1758 cut-off events. [2024-06-04 16:14:34,916 INFO L125 PetriNetUnfolderBase]: For 32326/32361 co-relation queries the response was YES. [2024-06-04 16:14:34,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9363 conditions, 1758 events. 1043/1758 cut-off events. For 32326/32361 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9409 event pairs, 246 based on Foata normal form. 8/1707 useless extension candidates. Maximal degree in co-relation 9308. Up to 1409 conditions per place. [2024-06-04 16:14:34,929 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 91 selfloop transitions, 37 changer transitions 0/155 dead transitions. [2024-06-04 16:14:34,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 155 transitions, 1395 flow [2024-06-04 16:14:34,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:14:34,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:14:34,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-04 16:14:34,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-04 16:14:34,930 INFO L175 Difference]: Start difference. First operand has 113 places, 121 transitions, 1053 flow. Second operand 8 states and 201 transitions. [2024-06-04 16:14:34,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 155 transitions, 1395 flow [2024-06-04 16:14:34,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 155 transitions, 1335 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 16:14:34,954 INFO L231 Difference]: Finished difference. Result has 117 places, 121 transitions, 1075 flow [2024-06-04 16:14:34,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1075, PETRI_PLACES=117, PETRI_TRANSITIONS=121} [2024-06-04 16:14:34,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-04 16:14:34,955 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 121 transitions, 1075 flow [2024-06-04 16:14:34,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:34,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:34,955 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 16:14:34,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 16:14:34,956 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 16:14:34,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:34,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1259509531, now seen corresponding path program 3 times [2024-06-04 16:14:34,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:34,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082064039] [2024-06-04 16:14:34,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:34,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:35,182 INFO 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 16:14:35,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:35,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082064039] [2024-06-04 16:14:35,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082064039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:35,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:35,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:14:35,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149136959] [2024-06-04 16:14:35,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:35,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:14:35,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:35,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:14:35,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:14:35,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:14:35,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 121 transitions, 1075 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:35,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:35,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:14:35,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:35,492 INFO L124 PetriNetUnfolderBase]: 1031/1732 cut-off events. [2024-06-04 16:14:35,492 INFO L125 PetriNetUnfolderBase]: For 33642/33671 co-relation queries the response was YES. [2024-06-04 16:14:35,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9329 conditions, 1732 events. 1031/1732 cut-off events. For 33642/33671 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9221 event pairs, 244 based on Foata normal form. 6/1678 useless extension candidates. Maximal degree in co-relation 9272. Up to 1392 conditions per place. [2024-06-04 16:14:35,505 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 90 selfloop transitions, 37 changer transitions 0/154 dead transitions. [2024-06-04 16:14:35,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 154 transitions, 1427 flow [2024-06-04 16:14:35,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:14:35,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:14:35,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-04 16:14:35,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-04 16:14:35,507 INFO L175 Difference]: Start difference. First operand has 117 places, 121 transitions, 1075 flow. Second operand 8 states and 198 transitions. [2024-06-04 16:14:35,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 154 transitions, 1427 flow [2024-06-04 16:14:35,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 154 transitions, 1344 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 16:14:35,533 INFO L231 Difference]: Finished difference. Result has 118 places, 123 transitions, 1098 flow [2024-06-04 16:14:35,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1098, PETRI_PLACES=118, PETRI_TRANSITIONS=123} [2024-06-04 16:14:35,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-04 16:14:35,534 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 123 transitions, 1098 flow [2024-06-04 16:14:35,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:35,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:35,534 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 16:14:35,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 16:14:35,534 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 16:14:35,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:35,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1063539590, now seen corresponding path program 1 times [2024-06-04 16:14:35,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:35,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002428150] [2024-06-04 16:14:35,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:35,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:35,764 INFO 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 16:14:35,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:35,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002428150] [2024-06-04 16:14:35,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002428150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:35,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:35,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:14:35,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592234699] [2024-06-04 16:14:35,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:35,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:14:35,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:35,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:14:35,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:14:35,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:35,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 123 transitions, 1098 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 16:14:35,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:35,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:35,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:36,034 INFO L124 PetriNetUnfolderBase]: 1119/1867 cut-off events. [2024-06-04 16:14:36,034 INFO L125 PetriNetUnfolderBase]: For 33407/33413 co-relation queries the response was YES. [2024-06-04 16:14:36,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9970 conditions, 1867 events. 1119/1867 cut-off events. For 33407/33413 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9895 event pairs, 280 based on Foata normal form. 6/1868 useless extension candidates. Maximal degree in co-relation 9912. Up to 1590 conditions per place. [2024-06-04 16:14:36,049 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 116 selfloop transitions, 34 changer transitions 0/157 dead transitions. [2024-06-04 16:14:36,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 157 transitions, 1705 flow [2024-06-04 16:14:36,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:14:36,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:14:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 16:14:36,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-04 16:14:36,050 INFO L175 Difference]: Start difference. First operand has 118 places, 123 transitions, 1098 flow. Second operand 6 states and 149 transitions. [2024-06-04 16:14:36,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 157 transitions, 1705 flow [2024-06-04 16:14:36,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 157 transitions, 1611 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 16:14:36,082 INFO L231 Difference]: Finished difference. Result has 120 places, 139 transitions, 1287 flow [2024-06-04 16:14:36,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1287, PETRI_PLACES=120, PETRI_TRANSITIONS=139} [2024-06-04 16:14:36,082 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-04 16:14:36,082 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 139 transitions, 1287 flow [2024-06-04 16:14:36,083 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 16:14:36,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:36,083 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 16:14:36,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 16:14:36,083 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 16:14:36,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:36,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1603426650, now seen corresponding path program 2 times [2024-06-04 16:14:36,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:36,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738587887] [2024-06-04 16:14:36,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:36,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:36,316 INFO 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 16:14:36,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:36,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738587887] [2024-06-04 16:14:36,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738587887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:36,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:36,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:14:36,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954496257] [2024-06-04 16:14:36,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:36,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:14:36,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:36,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:14:36,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:14:36,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:36,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 139 transitions, 1287 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 16:14:36,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:36,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:36,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:36,569 INFO L124 PetriNetUnfolderBase]: 1147/1909 cut-off events. [2024-06-04 16:14:36,569 INFO L125 PetriNetUnfolderBase]: For 36483/36483 co-relation queries the response was YES. [2024-06-04 16:14:36,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10599 conditions, 1909 events. 1147/1909 cut-off events. For 36483/36483 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10066 event pairs, 270 based on Foata normal form. 2/1908 useless extension candidates. Maximal degree in co-relation 10538. Up to 1648 conditions per place. [2024-06-04 16:14:36,586 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 125 selfloop transitions, 34 changer transitions 0/166 dead transitions. [2024-06-04 16:14:36,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 166 transitions, 1802 flow [2024-06-04 16:14:36,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:14:36,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:14:36,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-04 16:14:36,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-04 16:14:36,587 INFO L175 Difference]: Start difference. First operand has 120 places, 139 transitions, 1287 flow. Second operand 5 states and 132 transitions. [2024-06-04 16:14:36,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 166 transitions, 1802 flow [2024-06-04 16:14:36,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 166 transitions, 1762 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-06-04 16:14:36,627 INFO L231 Difference]: Finished difference. Result has 126 places, 147 transitions, 1473 flow [2024-06-04 16:14:36,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1473, PETRI_PLACES=126, PETRI_TRANSITIONS=147} [2024-06-04 16:14:36,628 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-04 16:14:36,628 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 147 transitions, 1473 flow [2024-06-04 16:14:36,628 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 16:14:36,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:36,628 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 16:14:36,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 16:14:36,629 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 16:14:36,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:36,629 INFO L85 PathProgramCache]: Analyzing trace with hash -536055482, now seen corresponding path program 3 times [2024-06-04 16:14:36,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:36,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67307954] [2024-06-04 16:14:36,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:36,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:36,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:36,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:36,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67307954] [2024-06-04 16:14:36,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67307954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:36,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:36,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:14:36,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309815424] [2024-06-04 16:14:36,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:36,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:14:36,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:36,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:14:36,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:14:36,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:36,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 147 transitions, 1473 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 16:14:36,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:36,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:36,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:37,191 INFO L124 PetriNetUnfolderBase]: 1149/1917 cut-off events. [2024-06-04 16:14:37,192 INFO L125 PetriNetUnfolderBase]: For 39723/39729 co-relation queries the response was YES. [2024-06-04 16:14:37,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10889 conditions, 1917 events. 1149/1917 cut-off events. For 39723/39729 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10182 event pairs, 282 based on Foata normal form. 6/1918 useless extension candidates. Maximal degree in co-relation 10824. Up to 1622 conditions per place. [2024-06-04 16:14:37,207 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 115 selfloop transitions, 45 changer transitions 0/167 dead transitions. [2024-06-04 16:14:37,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 167 transitions, 1977 flow [2024-06-04 16:14:37,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:14:37,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:14:37,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-04 16:14:37,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-04 16:14:37,208 INFO L175 Difference]: Start difference. First operand has 126 places, 147 transitions, 1473 flow. Second operand 5 states and 130 transitions. [2024-06-04 16:14:37,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 167 transitions, 1977 flow [2024-06-04 16:14:37,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 167 transitions, 1928 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-04 16:14:37,256 INFO L231 Difference]: Finished difference. Result has 129 places, 150 transitions, 1568 flow [2024-06-04 16:14:37,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1568, PETRI_PLACES=129, PETRI_TRANSITIONS=150} [2024-06-04 16:14:37,256 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-04 16:14:37,257 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 150 transitions, 1568 flow [2024-06-04 16:14:37,257 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 16:14:37,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:37,257 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 16:14:37,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 16:14:37,257 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 16:14:37,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:37,257 INFO L85 PathProgramCache]: Analyzing trace with hash 236855980, now seen corresponding path program 1 times [2024-06-04 16:14:37,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:37,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27458097] [2024-06-04 16:14:37,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:37,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:37,491 INFO 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 16:14:37,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:37,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27458097] [2024-06-04 16:14:37,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27458097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:37,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:37,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:14:37,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666792353] [2024-06-04 16:14:37,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:37,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:14:37,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:37,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:14:37,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:14:37,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:37,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 150 transitions, 1568 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 16:14:37,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:37,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:37,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:37,810 INFO L124 PetriNetUnfolderBase]: 1167/1944 cut-off events. [2024-06-04 16:14:37,810 INFO L125 PetriNetUnfolderBase]: For 43429/43429 co-relation queries the response was YES. [2024-06-04 16:14:37,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11226 conditions, 1944 events. 1167/1944 cut-off events. For 43429/43429 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 10351 event pairs, 292 based on Foata normal form. 2/1938 useless extension candidates. Maximal degree in co-relation 11160. Up to 1629 conditions per place. [2024-06-04 16:14:37,827 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 134 selfloop transitions, 38 changer transitions 0/179 dead transitions. [2024-06-04 16:14:37,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 179 transitions, 2182 flow [2024-06-04 16:14:37,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:14:37,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:14:37,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 16:14:37,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-04 16:14:37,829 INFO L175 Difference]: Start difference. First operand has 129 places, 150 transitions, 1568 flow. Second operand 6 states and 149 transitions. [2024-06-04 16:14:37,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 179 transitions, 2182 flow [2024-06-04 16:14:37,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 179 transitions, 2076 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-04 16:14:37,871 INFO L231 Difference]: Finished difference. Result has 132 places, 161 transitions, 1679 flow [2024-06-04 16:14:37,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1679, PETRI_PLACES=132, PETRI_TRANSITIONS=161} [2024-06-04 16:14:37,872 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-04 16:14:37,872 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 161 transitions, 1679 flow [2024-06-04 16:14:37,872 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 16:14:37,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:37,872 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 16:14:37,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 16:14:37,873 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 16:14:37,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:37,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1233432248, now seen corresponding path program 1 times [2024-06-04 16:14:37,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:37,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17555736] [2024-06-04 16:14:37,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:37,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:38,084 INFO 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 16:14:38,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:38,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17555736] [2024-06-04 16:14:38,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17555736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:38,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:38,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:14:38,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45506194] [2024-06-04 16:14:38,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:38,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:14:38,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:38,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:14:38,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:14:38,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:38,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 161 transitions, 1679 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 16:14:38,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:38,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:38,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:38,374 INFO L124 PetriNetUnfolderBase]: 1187/1978 cut-off events. [2024-06-04 16:14:38,374 INFO L125 PetriNetUnfolderBase]: For 44464/44464 co-relation queries the response was YES. [2024-06-04 16:14:38,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11641 conditions, 1978 events. 1187/1978 cut-off events. For 44464/44464 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10535 event pairs, 288 based on Foata normal form. 2/1973 useless extension candidates. Maximal degree in co-relation 11575. Up to 1663 conditions per place. [2024-06-04 16:14:38,389 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 125 selfloop transitions, 52 changer transitions 0/184 dead transitions. [2024-06-04 16:14:38,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 184 transitions, 2306 flow [2024-06-04 16:14:38,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:14:38,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:14:38,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 16:14:38,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-04 16:14:38,390 INFO L175 Difference]: Start difference. First operand has 132 places, 161 transitions, 1679 flow. Second operand 6 states and 146 transitions. [2024-06-04 16:14:38,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 184 transitions, 2306 flow [2024-06-04 16:14:38,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 184 transitions, 2242 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-04 16:14:38,439 INFO L231 Difference]: Finished difference. Result has 138 places, 169 transitions, 1866 flow [2024-06-04 16:14:38,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1619, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1866, PETRI_PLACES=138, PETRI_TRANSITIONS=169} [2024-06-04 16:14:38,440 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-04 16:14:38,440 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 169 transitions, 1866 flow [2024-06-04 16:14:38,440 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 16:14:38,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:38,440 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 16:14:38,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 16:14:38,441 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:38,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:38,441 INFO L85 PathProgramCache]: Analyzing trace with hash 332279124, now seen corresponding path program 2 times [2024-06-04 16:14:38,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:38,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795868329] [2024-06-04 16:14:38,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:38,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:38,657 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 16:14:38,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:38,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795868329] [2024-06-04 16:14:38,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795868329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:38,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:38,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:14:38,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599976183] [2024-06-04 16:14:38,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:38,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:14:38,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:38,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:14:38,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:14:38,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:38,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 169 transitions, 1866 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 16:14:38,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:38,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:38,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:38,966 INFO L124 PetriNetUnfolderBase]: 1197/1995 cut-off events. [2024-06-04 16:14:38,967 INFO L125 PetriNetUnfolderBase]: For 47702/47702 co-relation queries the response was YES. [2024-06-04 16:14:38,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11945 conditions, 1995 events. 1197/1995 cut-off events. For 47702/47702 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10600 event pairs, 280 based on Foata normal form. 2/1990 useless extension candidates. Maximal degree in co-relation 11875. Up to 1726 conditions per place. [2024-06-04 16:14:38,983 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 148 selfloop transitions, 31 changer transitions 0/186 dead transitions. [2024-06-04 16:14:38,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 186 transitions, 2296 flow [2024-06-04 16:14:38,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:14:38,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:14:38,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-04 16:14:38,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-04 16:14:38,984 INFO L175 Difference]: Start difference. First operand has 138 places, 169 transitions, 1866 flow. Second operand 6 states and 142 transitions. [2024-06-04 16:14:38,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 186 transitions, 2296 flow [2024-06-04 16:14:39,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 186 transitions, 2148 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-04 16:14:39,046 INFO L231 Difference]: Finished difference. Result has 141 places, 173 transitions, 1835 flow [2024-06-04 16:14:39,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1835, PETRI_PLACES=141, PETRI_TRANSITIONS=173} [2024-06-04 16:14:39,048 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-04 16:14:39,048 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 173 transitions, 1835 flow [2024-06-04 16:14:39,049 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 16:14:39,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:39,049 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 16:14:39,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 16:14:39,049 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:39,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:39,049 INFO L85 PathProgramCache]: Analyzing trace with hash -497409828, now seen corresponding path program 2 times [2024-06-04 16:14:39,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:39,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006142272] [2024-06-04 16:14:39,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:39,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:39,261 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 16:14:39,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:39,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006142272] [2024-06-04 16:14:39,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006142272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:39,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:39,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:14:39,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727595764] [2024-06-04 16:14:39,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:39,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:14:39,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:39,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:14:39,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:14:39,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:39,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 173 transitions, 1835 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 16:14:39,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:39,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:39,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:39,523 INFO L124 PetriNetUnfolderBase]: 1199/1999 cut-off events. [2024-06-04 16:14:39,523 INFO L125 PetriNetUnfolderBase]: For 49883/49883 co-relation queries the response was YES. [2024-06-04 16:14:39,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11955 conditions, 1999 events. 1199/1999 cut-off events. For 49883/49883 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10681 event pairs, 288 based on Foata normal form. 2/1994 useless extension candidates. Maximal degree in co-relation 11885. Up to 1681 conditions per place. [2024-06-04 16:14:39,539 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 128 selfloop transitions, 55 changer transitions 0/190 dead transitions. [2024-06-04 16:14:39,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 190 transitions, 2392 flow [2024-06-04 16:14:39,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:14:39,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:14:39,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-04 16:14:39,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-06-04 16:14:39,541 INFO L175 Difference]: Start difference. First operand has 141 places, 173 transitions, 1835 flow. Second operand 5 states and 127 transitions. [2024-06-04 16:14:39,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 190 transitions, 2392 flow [2024-06-04 16:14:39,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 190 transitions, 2301 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 16:14:39,602 INFO L231 Difference]: Finished difference. Result has 141 places, 176 transitions, 1911 flow [2024-06-04 16:14:39,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1744, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1911, PETRI_PLACES=141, PETRI_TRANSITIONS=176} [2024-06-04 16:14:39,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-04 16:14:39,603 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 176 transitions, 1911 flow [2024-06-04 16:14:39,603 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 16:14:39,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:39,604 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 16:14:39,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 16:14:39,604 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:39,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:39,604 INFO L85 PathProgramCache]: Analyzing trace with hash -535840404, now seen corresponding path program 3 times [2024-06-04 16:14:39,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:39,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836831638] [2024-06-04 16:14:39,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:39,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:39,833 INFO 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 16:14:39,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:39,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836831638] [2024-06-04 16:14:39,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836831638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:39,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:39,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:14:39,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200171105] [2024-06-04 16:14:39,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:39,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:14:39,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:39,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:14:39,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:14:39,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:39,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 176 transitions, 1911 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 16:14:39,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:39,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:39,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:40,157 INFO L124 PetriNetUnfolderBase]: 1201/2005 cut-off events. [2024-06-04 16:14:40,158 INFO L125 PetriNetUnfolderBase]: For 52307/52307 co-relation queries the response was YES. [2024-06-04 16:14:40,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12114 conditions, 2005 events. 1201/2005 cut-off events. For 52307/52307 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10724 event pairs, 280 based on Foata normal form. 2/2000 useless extension candidates. Maximal degree in co-relation 12044. Up to 1680 conditions per place. [2024-06-04 16:14:40,174 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 145 selfloop transitions, 47 changer transitions 0/199 dead transitions. [2024-06-04 16:14:40,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 199 transitions, 2443 flow [2024-06-04 16:14:40,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:14:40,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:14:40,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-04 16:14:40,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 16:14:40,193 INFO L175 Difference]: Start difference. First operand has 141 places, 176 transitions, 1911 flow. Second operand 6 states and 150 transitions. [2024-06-04 16:14:40,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 199 transitions, 2443 flow [2024-06-04 16:14:40,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 199 transitions, 2305 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-04 16:14:40,278 INFO L231 Difference]: Finished difference. Result has 145 places, 179 transitions, 1947 flow [2024-06-04 16:14:40,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1775, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1947, PETRI_PLACES=145, PETRI_TRANSITIONS=179} [2024-06-04 16:14:40,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-04 16:14:40,279 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 179 transitions, 1947 flow [2024-06-04 16:14:40,279 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 16:14:40,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:40,279 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 16:14:40,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 16:14:40,280 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:40,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:40,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1739189820, now seen corresponding path program 3 times [2024-06-04 16:14:40,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:40,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742266109] [2024-06-04 16:14:40,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:40,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:40,680 INFO 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 16:14:40,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:40,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742266109] [2024-06-04 16:14:40,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742266109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:40,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:40,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:14:40,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517959941] [2024-06-04 16:14:40,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:40,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:14:40,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:40,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:14:40,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:14:40,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:40,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 179 transitions, 1947 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 16:14:40,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:40,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:40,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:40,978 INFO L124 PetriNetUnfolderBase]: 1193/2002 cut-off events. [2024-06-04 16:14:40,978 INFO L125 PetriNetUnfolderBase]: For 50770/50770 co-relation queries the response was YES. [2024-06-04 16:14:40,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12012 conditions, 2002 events. 1193/2002 cut-off events. For 50770/50770 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10745 event pairs, 266 based on Foata normal form. 2/2001 useless extension candidates. Maximal degree in co-relation 11941. Up to 1712 conditions per place. [2024-06-04 16:14:40,995 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 152 selfloop transitions, 38 changer transitions 0/197 dead transitions. [2024-06-04 16:14:40,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 197 transitions, 2373 flow [2024-06-04 16:14:40,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:14:40,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:14:40,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-04 16:14:40,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6238095238095238 [2024-06-04 16:14:40,997 INFO L175 Difference]: Start difference. First operand has 145 places, 179 transitions, 1947 flow. Second operand 5 states and 131 transitions. [2024-06-04 16:14:40,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 197 transitions, 2373 flow [2024-06-04 16:14:41,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 197 transitions, 2262 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 16:14:41,067 INFO L231 Difference]: Finished difference. Result has 146 places, 179 transitions, 1936 flow [2024-06-04 16:14:41,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1936, PETRI_PLACES=146, PETRI_TRANSITIONS=179} [2024-06-04 16:14:41,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-04 16:14:41,068 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 179 transitions, 1936 flow [2024-06-04 16:14:41,068 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 16:14:41,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:41,068 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 16:14:41,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 16:14:41,069 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:41,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:41,069 INFO L85 PathProgramCache]: Analyzing trace with hash -535594140, now seen corresponding path program 1 times [2024-06-04 16:14:41,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:41,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609864872] [2024-06-04 16:14:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:41,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:41,283 INFO 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 16:14:41,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:41,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609864872] [2024-06-04 16:14:41,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609864872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:41,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:41,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:14:41,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155435133] [2024-06-04 16:14:41,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:41,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:14:41,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:41,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:14:41,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:14:41,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:14:41,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 179 transitions, 1936 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 16:14:41,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:41,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:14:41,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:41,568 INFO L124 PetriNetUnfolderBase]: 1129/1936 cut-off events. [2024-06-04 16:14:41,568 INFO L125 PetriNetUnfolderBase]: For 49296/49296 co-relation queries the response was YES. [2024-06-04 16:14:41,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11529 conditions, 1936 events. 1129/1936 cut-off events. For 49296/49296 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10557 event pairs, 265 based on Foata normal form. 2/1935 useless extension candidates. Maximal degree in co-relation 11457. Up to 1588 conditions per place. [2024-06-04 16:14:41,584 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 146 selfloop transitions, 10 changer transitions 0/190 dead transitions. [2024-06-04 16:14:41,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 190 transitions, 2294 flow [2024-06-04 16:14:41,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:14:41,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:14:41,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-04 16:14:41,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-04 16:14:41,585 INFO L175 Difference]: Start difference. First operand has 146 places, 179 transitions, 1936 flow. Second operand 4 states and 101 transitions. [2024-06-04 16:14:41,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 190 transitions, 2294 flow [2024-06-04 16:14:41,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 190 transitions, 2218 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 16:14:41,643 INFO L231 Difference]: Finished difference. Result has 146 places, 181 transitions, 1913 flow [2024-06-04 16:14:41,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1860, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1913, PETRI_PLACES=146, PETRI_TRANSITIONS=181} [2024-06-04 16:14:41,644 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-04 16:14:41,644 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 181 transitions, 1913 flow [2024-06-04 16:14:41,644 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 16:14:41,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:41,644 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 16:14:41,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 16:14:41,644 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 16:14:41,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:41,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1346028900, now seen corresponding path program 1 times [2024-06-04 16:14:41,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:41,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627345055] [2024-06-04 16:14:41,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:41,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:41,869 INFO 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 16:14:41,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:41,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627345055] [2024-06-04 16:14:41,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627345055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:41,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:41,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:41,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504288042] [2024-06-04 16:14:41,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:41,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:41,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:41,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:41,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:41,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:41,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 181 transitions, 1913 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:41,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:41,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:41,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:42,326 INFO L124 PetriNetUnfolderBase]: 1315/2228 cut-off events. [2024-06-04 16:14:42,326 INFO L125 PetriNetUnfolderBase]: For 64005/64011 co-relation queries the response was YES. [2024-06-04 16:14:42,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13193 conditions, 2228 events. 1315/2228 cut-off events. For 64005/64011 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12391 event pairs, 217 based on Foata normal form. 12/2233 useless extension candidates. Maximal degree in co-relation 13120. Up to 1496 conditions per place. [2024-06-04 16:14:42,343 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 49 changer transitions 0/239 dead transitions. [2024-06-04 16:14:42,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 239 transitions, 2686 flow [2024-06-04 16:14:42,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:14:42,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:14:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2024-06-04 16:14:42,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2024-06-04 16:14:42,345 INFO L175 Difference]: Start difference. First operand has 146 places, 181 transitions, 1913 flow. Second operand 10 states and 248 transitions. [2024-06-04 16:14:42,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 239 transitions, 2686 flow [2024-06-04 16:14:42,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 239 transitions, 2649 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-04 16:14:42,419 INFO L231 Difference]: Finished difference. Result has 156 places, 186 transitions, 2054 flow [2024-06-04 16:14:42,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1876, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2054, PETRI_PLACES=156, PETRI_TRANSITIONS=186} [2024-06-04 16:14:42,420 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-04 16:14:42,420 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 186 transitions, 2054 flow [2024-06-04 16:14:42,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:42,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:42,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:42,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 16:14:42,421 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 16:14:42,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:42,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1434594660, now seen corresponding path program 2 times [2024-06-04 16:14:42,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:42,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152632351] [2024-06-04 16:14:42,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:42,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:42,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:42,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152632351] [2024-06-04 16:14:42,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152632351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:42,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:42,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:42,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127125164] [2024-06-04 16:14:42,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:42,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:42,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:42,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:42,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:42,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:42,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 186 transitions, 2054 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:42,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:42,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:42,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:43,194 INFO L124 PetriNetUnfolderBase]: 1442/2451 cut-off events. [2024-06-04 16:14:43,194 INFO L125 PetriNetUnfolderBase]: For 75303/75309 co-relation queries the response was YES. [2024-06-04 16:14:43,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14919 conditions, 2451 events. 1442/2451 cut-off events. For 75303/75309 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14028 event pairs, 331 based on Foata normal form. 12/2456 useless extension candidates. Maximal degree in co-relation 14843. Up to 1830 conditions per place. [2024-06-04 16:14:43,215 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 181 selfloop transitions, 47 changer transitions 0/235 dead transitions. [2024-06-04 16:14:43,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 235 transitions, 2787 flow [2024-06-04 16:14:43,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:14:43,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:14:43,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-04 16:14:43,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978835978835979 [2024-06-04 16:14:43,217 INFO L175 Difference]: Start difference. First operand has 156 places, 186 transitions, 2054 flow. Second operand 9 states and 226 transitions. [2024-06-04 16:14:43,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 235 transitions, 2787 flow [2024-06-04 16:14:43,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 235 transitions, 2713 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 16:14:43,333 INFO L231 Difference]: Finished difference. Result has 161 places, 189 transitions, 2128 flow [2024-06-04 16:14:43,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1980, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2128, PETRI_PLACES=161, PETRI_TRANSITIONS=189} [2024-06-04 16:14:43,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-04 16:14:43,333 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 189 transitions, 2128 flow [2024-06-04 16:14:43,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:43,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:43,334 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 16:14:43,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 16:14:43,334 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:43,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:43,336 INFO L85 PathProgramCache]: Analyzing trace with hash -214705298, now seen corresponding path program 3 times [2024-06-04 16:14:43,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:43,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68361073] [2024-06-04 16:14:43,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:43,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:43,611 INFO 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 16:14:43,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:43,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68361073] [2024-06-04 16:14:43,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68361073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:43,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:43,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:43,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801097068] [2024-06-04 16:14:43,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:43,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:43,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:43,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:43,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:43,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:43,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 189 transitions, 2128 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:43,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:43,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:43,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:44,070 INFO L124 PetriNetUnfolderBase]: 1414/2407 cut-off events. [2024-06-04 16:14:44,070 INFO L125 PetriNetUnfolderBase]: For 75374/75380 co-relation queries the response was YES. [2024-06-04 16:14:44,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14617 conditions, 2407 events. 1414/2407 cut-off events. For 75374/75380 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13731 event pairs, 332 based on Foata normal form. 16/2416 useless extension candidates. Maximal degree in co-relation 14538. Up to 1909 conditions per place. [2024-06-04 16:14:44,091 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 46 changer transitions 0/231 dead transitions. [2024-06-04 16:14:44,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 231 transitions, 2708 flow [2024-06-04 16:14:44,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:14:44,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:14:44,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-04 16:14:44,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846560846560847 [2024-06-04 16:14:44,092 INFO L175 Difference]: Start difference. First operand has 161 places, 189 transitions, 2128 flow. Second operand 9 states and 221 transitions. [2024-06-04 16:14:44,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 231 transitions, 2708 flow [2024-06-04 16:14:44,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 231 transitions, 2630 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 16:14:44,186 INFO L231 Difference]: Finished difference. Result has 165 places, 190 transitions, 2171 flow [2024-06-04 16:14:44,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2058, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2171, PETRI_PLACES=165, PETRI_TRANSITIONS=190} [2024-06-04 16:14:44,187 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-04 16:14:44,187 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 190 transitions, 2171 flow [2024-06-04 16:14:44,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:44,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:44,187 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 16:14:44,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 16:14:44,187 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:44,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:44,188 INFO L85 PathProgramCache]: Analyzing trace with hash 201918776, now seen corresponding path program 4 times [2024-06-04 16:14:44,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:44,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182466065] [2024-06-04 16:14:44,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:44,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:44,396 INFO 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 16:14:44,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:44,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182466065] [2024-06-04 16:14:44,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182466065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:44,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:44,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:14:44,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11805775] [2024-06-04 16:14:44,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:44,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:14:44,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:44,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:14:44,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:14:44,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:44,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 190 transitions, 2171 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 16:14:44,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:44,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:44,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:44,816 INFO L124 PetriNetUnfolderBase]: 1472/2494 cut-off events. [2024-06-04 16:14:44,816 INFO L125 PetriNetUnfolderBase]: For 79390/79390 co-relation queries the response was YES. [2024-06-04 16:14:44,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15154 conditions, 2494 events. 1472/2494 cut-off events. For 79390/79390 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14364 event pairs, 347 based on Foata normal form. 16/2502 useless extension candidates. Maximal degree in co-relation 15073. Up to 2007 conditions per place. [2024-06-04 16:14:44,837 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 48 changer transitions 0/233 dead transitions. [2024-06-04 16:14:44,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 233 transitions, 2753 flow [2024-06-04 16:14:44,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:14:44,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:14:44,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-04 16:14:44,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-04 16:14:44,838 INFO L175 Difference]: Start difference. First operand has 165 places, 190 transitions, 2171 flow. Second operand 10 states and 238 transitions. [2024-06-04 16:14:44,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 233 transitions, 2753 flow [2024-06-04 16:14:44,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 233 transitions, 2664 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-04 16:14:44,932 INFO L231 Difference]: Finished difference. Result has 168 places, 191 transitions, 2203 flow [2024-06-04 16:14:44,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2082, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2203, PETRI_PLACES=168, PETRI_TRANSITIONS=191} [2024-06-04 16:14:44,933 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-04 16:14:44,933 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 191 transitions, 2203 flow [2024-06-04 16:14:44,933 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 16:14:44,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:44,934 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 16:14:44,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 16:14:44,934 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 16:14:44,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:44,934 INFO L85 PathProgramCache]: Analyzing trace with hash 494426656, now seen corresponding path program 5 times [2024-06-04 16:14:44,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:44,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587295365] [2024-06-04 16:14:44,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:44,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:45,138 INFO 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 16:14:45,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:45,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587295365] [2024-06-04 16:14:45,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587295365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:45,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:45,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:14:45,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099846515] [2024-06-04 16:14:45,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:45,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:14:45,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:45,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:14:45,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:14:45,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:45,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 191 transitions, 2203 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 16:14:45,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:45,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:45,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:45,554 INFO L124 PetriNetUnfolderBase]: 1530/2602 cut-off events. [2024-06-04 16:14:45,554 INFO L125 PetriNetUnfolderBase]: For 84345/84345 co-relation queries the response was YES. [2024-06-04 16:14:45,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15739 conditions, 2602 events. 1530/2602 cut-off events. For 84345/84345 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15185 event pairs, 362 based on Foata normal form. 16/2610 useless extension candidates. Maximal degree in co-relation 15657. Up to 2105 conditions per place. [2024-06-04 16:14:45,577 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 177 selfloop transitions, 46 changer transitions 0/230 dead transitions. [2024-06-04 16:14:45,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 230 transitions, 2771 flow [2024-06-04 16:14:45,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:14:45,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:14:45,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-04 16:14:45,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-04 16:14:45,579 INFO L175 Difference]: Start difference. First operand has 168 places, 191 transitions, 2203 flow. Second operand 9 states and 219 transitions. [2024-06-04 16:14:45,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 230 transitions, 2771 flow [2024-06-04 16:14:45,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 230 transitions, 2668 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:45,673 INFO L231 Difference]: Finished difference. Result has 169 places, 192 transitions, 2219 flow [2024-06-04 16:14:45,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2100, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2219, PETRI_PLACES=169, PETRI_TRANSITIONS=192} [2024-06-04 16:14:45,674 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-04 16:14:45,674 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 192 transitions, 2219 flow [2024-06-04 16:14:45,674 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 16:14:45,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:45,674 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 16:14:45,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 16:14:45,675 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 16:14:45,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:45,675 INFO L85 PathProgramCache]: Analyzing trace with hash 488359632, now seen corresponding path program 6 times [2024-06-04 16:14:45,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:45,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684763299] [2024-06-04 16:14:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:45,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:45,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:45,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684763299] [2024-06-04 16:14:45,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684763299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:45,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:45,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:14:45,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735859896] [2024-06-04 16:14:45,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:45,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:14:45,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:45,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:14:45,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:14:45,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:45,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 192 transitions, 2219 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 16:14:45,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:45,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:45,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:46,339 INFO L124 PetriNetUnfolderBase]: 1546/2634 cut-off events. [2024-06-04 16:14:46,339 INFO L125 PetriNetUnfolderBase]: For 84985/84985 co-relation queries the response was YES. [2024-06-04 16:14:46,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15805 conditions, 2634 events. 1546/2634 cut-off events. For 84985/84985 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15460 event pairs, 353 based on Foata normal form. 12/2638 useless extension candidates. Maximal degree in co-relation 15722. Up to 1958 conditions per place. [2024-06-04 16:14:46,360 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 180 selfloop transitions, 49 changer transitions 0/236 dead transitions. [2024-06-04 16:14:46,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 236 transitions, 2837 flow [2024-06-04 16:14:46,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:14:46,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:14:46,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-04 16:14:46,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846560846560847 [2024-06-04 16:14:46,361 INFO L175 Difference]: Start difference. First operand has 169 places, 192 transitions, 2219 flow. Second operand 9 states and 221 transitions. [2024-06-04 16:14:46,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 236 transitions, 2837 flow [2024-06-04 16:14:46,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 236 transitions, 2736 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 16:14:46,460 INFO L231 Difference]: Finished difference. Result has 172 places, 195 transitions, 2279 flow [2024-06-04 16:14:46,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2118, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2279, PETRI_PLACES=172, PETRI_TRANSITIONS=195} [2024-06-04 16:14:46,461 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-04 16:14:46,461 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 195 transitions, 2279 flow [2024-06-04 16:14:46,461 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 16:14:46,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:46,462 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 16:14:46,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 16:14:46,462 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:46,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:46,462 INFO L85 PathProgramCache]: Analyzing trace with hash 695433804, now seen corresponding path program 1 times [2024-06-04 16:14:46,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:46,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709883891] [2024-06-04 16:14:46,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:46,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:46,660 INFO 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 16:14:46,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:46,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709883891] [2024-06-04 16:14:46,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709883891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:46,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:46,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:14:46,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144624897] [2024-06-04 16:14:46,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:46,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:14:46,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:46,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:14:46,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:14:46,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:46,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 195 transitions, 2279 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 16:14:46,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:46,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:46,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:47,121 INFO L124 PetriNetUnfolderBase]: 1587/2715 cut-off events. [2024-06-04 16:14:47,121 INFO L125 PetriNetUnfolderBase]: For 89955/89955 co-relation queries the response was YES. [2024-06-04 16:14:47,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16256 conditions, 2715 events. 1587/2715 cut-off events. For 89955/89955 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 16173 event pairs, 329 based on Foata normal form. 12/2719 useless extension candidates. Maximal degree in co-relation 16171. Up to 1919 conditions per place. [2024-06-04 16:14:47,145 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 180 selfloop transitions, 54 changer transitions 0/241 dead transitions. [2024-06-04 16:14:47,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 241 transitions, 2893 flow [2024-06-04 16:14:47,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:14:47,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:14:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-04 16:14:47,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738095238095238 [2024-06-04 16:14:47,146 INFO L175 Difference]: Start difference. First operand has 172 places, 195 transitions, 2279 flow. Second operand 10 states and 241 transitions. [2024-06-04 16:14:47,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 241 transitions, 2893 flow [2024-06-04 16:14:47,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 241 transitions, 2815 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 16:14:47,293 INFO L231 Difference]: Finished difference. Result has 177 places, 196 transitions, 2339 flow [2024-06-04 16:14:47,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2201, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2339, PETRI_PLACES=177, PETRI_TRANSITIONS=196} [2024-06-04 16:14:47,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-04 16:14:47,294 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 196 transitions, 2339 flow [2024-06-04 16:14:47,294 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 16:14:47,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:47,294 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 16:14:47,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 16:14:47,294 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:47,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:47,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1006932276, now seen corresponding path program 7 times [2024-06-04 16:14:47,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:47,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45610658] [2024-06-04 16:14:47,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:47,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:47,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:47,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45610658] [2024-06-04 16:14:47,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45610658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:47,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:47,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:14:47,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054059922] [2024-06-04 16:14:47,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:47,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:14:47,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:47,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:14:47,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:14:47,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:47,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 196 transitions, 2339 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 16:14:47,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:47,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:47,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:47,971 INFO L124 PetriNetUnfolderBase]: 1628/2797 cut-off events. [2024-06-04 16:14:47,972 INFO L125 PetriNetUnfolderBase]: For 94658/94664 co-relation queries the response was YES. [2024-06-04 16:14:47,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16850 conditions, 2797 events. 1628/2797 cut-off events. For 94658/94664 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 16741 event pairs, 297 based on Foata normal form. 12/2802 useless extension candidates. Maximal degree in co-relation 16763. Up to 2106 conditions per place. [2024-06-04 16:14:47,996 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 185 selfloop transitions, 48 changer transitions 0/240 dead transitions. [2024-06-04 16:14:47,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 240 transitions, 3081 flow [2024-06-04 16:14:47,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:14:47,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:14:47,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-04 16:14:47,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-04 16:14:47,997 INFO L175 Difference]: Start difference. First operand has 177 places, 196 transitions, 2339 flow. Second operand 8 states and 205 transitions. [2024-06-04 16:14:47,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 240 transitions, 3081 flow [2024-06-04 16:14:48,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 240 transitions, 2957 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:48,125 INFO L231 Difference]: Finished difference. Result has 178 places, 198 transitions, 2353 flow [2024-06-04 16:14:48,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2215, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2353, PETRI_PLACES=178, PETRI_TRANSITIONS=198} [2024-06-04 16:14:48,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-04 16:14:48,126 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 198 transitions, 2353 flow [2024-06-04 16:14:48,126 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 16:14:48,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:48,126 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 16:14:48,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 16:14:48,127 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:48,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:48,127 INFO L85 PathProgramCache]: Analyzing trace with hash -77741648, now seen corresponding path program 8 times [2024-06-04 16:14:48,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:48,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961182088] [2024-06-04 16:14:48,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:48,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:48,376 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 16:14:48,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:48,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961182088] [2024-06-04 16:14:48,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961182088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:48,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:48,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:14:48,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805250395] [2024-06-04 16:14:48,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:48,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:14:48,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:48,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:14:48,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:14:48,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:48,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 198 transitions, 2353 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 16:14:48,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:48,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:48,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:48,868 INFO L124 PetriNetUnfolderBase]: 1686/2895 cut-off events. [2024-06-04 16:14:48,868 INFO L125 PetriNetUnfolderBase]: For 101908/101914 co-relation queries the response was YES. [2024-06-04 16:14:48,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17333 conditions, 2895 events. 1686/2895 cut-off events. For 101908/101914 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 17453 event pairs, 402 based on Foata normal form. 16/2904 useless extension candidates. Maximal degree in co-relation 17244. Up to 2377 conditions per place. [2024-06-04 16:14:48,897 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 46 changer transitions 0/236 dead transitions. [2024-06-04 16:14:48,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 236 transitions, 2935 flow [2024-06-04 16:14:48,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:14:48,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:14:48,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-04 16:14:48,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 16:14:48,898 INFO L175 Difference]: Start difference. First operand has 178 places, 198 transitions, 2353 flow. Second operand 8 states and 200 transitions. [2024-06-04 16:14:48,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 236 transitions, 2935 flow [2024-06-04 16:14:49,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 236 transitions, 2785 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-04 16:14:49,028 INFO L231 Difference]: Finished difference. Result has 179 places, 199 transitions, 2326 flow [2024-06-04 16:14:49,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2207, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2326, PETRI_PLACES=179, PETRI_TRANSITIONS=199} [2024-06-04 16:14:49,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-04 16:14:49,029 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 199 transitions, 2326 flow [2024-06-04 16:14:49,032 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 16:14:49,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:49,032 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 16:14:49,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 16:14:49,033 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:49,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:49,033 INFO L85 PathProgramCache]: Analyzing trace with hash -398182934, now seen corresponding path program 9 times [2024-06-04 16:14:49,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:49,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257879935] [2024-06-04 16:14:49,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:49,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:49,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:49,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257879935] [2024-06-04 16:14:49,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257879935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:49,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:49,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:14:49,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745014810] [2024-06-04 16:14:49,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:49,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:14:49,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:49,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:14:49,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:14:49,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:49,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 199 transitions, 2326 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 16:14:49,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:49,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:49,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:49,783 INFO L124 PetriNetUnfolderBase]: 1744/2993 cut-off events. [2024-06-04 16:14:49,783 INFO L125 PetriNetUnfolderBase]: For 106541/106547 co-relation queries the response was YES. [2024-06-04 16:14:49,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17587 conditions, 2993 events. 1744/2993 cut-off events. For 106541/106547 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 18201 event pairs, 412 based on Foata normal form. 16/3002 useless extension candidates. Maximal degree in co-relation 17498. Up to 2475 conditions per place. [2024-06-04 16:14:49,808 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 191 selfloop transitions, 47 changer transitions 0/245 dead transitions. [2024-06-04 16:14:49,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 245 transitions, 2944 flow [2024-06-04 16:14:49,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:14:49,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:14:49,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-04 16:14:49,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2024-06-04 16:14:49,810 INFO L175 Difference]: Start difference. First operand has 179 places, 199 transitions, 2326 flow. Second operand 10 states and 242 transitions. [2024-06-04 16:14:49,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 245 transitions, 2944 flow [2024-06-04 16:14:49,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 245 transitions, 2847 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 16:14:49,978 INFO L231 Difference]: Finished difference. Result has 183 places, 200 transitions, 2352 flow [2024-06-04 16:14:49,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2352, PETRI_PLACES=183, PETRI_TRANSITIONS=200} [2024-06-04 16:14:49,979 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-04 16:14:49,979 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 200 transitions, 2352 flow [2024-06-04 16:14:49,979 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 16:14:49,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:49,979 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 16:14:49,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 16:14:49,980 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:49,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:49,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1285671304, now seen corresponding path program 10 times [2024-06-04 16:14:49,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:49,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695040348] [2024-06-04 16:14:49,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:49,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:50,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:50,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695040348] [2024-06-04 16:14:50,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695040348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:50,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:50,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:14:50,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7960590] [2024-06-04 16:14:50,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:50,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:14:50,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:50,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:14:50,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:14:50,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:50,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 200 transitions, 2352 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 16:14:50,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:50,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:50,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:50,654 INFO L124 PetriNetUnfolderBase]: 1716/2945 cut-off events. [2024-06-04 16:14:50,654 INFO L125 PetriNetUnfolderBase]: For 101082/101088 co-relation queries the response was YES. [2024-06-04 16:14:50,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16917 conditions, 2945 events. 1716/2945 cut-off events. For 101082/101088 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17918 event pairs, 399 based on Foata normal form. 20/2957 useless extension candidates. Maximal degree in co-relation 16827. Up to 2431 conditions per place. [2024-06-04 16:14:50,680 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 186 selfloop transitions, 46 changer transitions 0/239 dead transitions. [2024-06-04 16:14:50,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 239 transitions, 2942 flow [2024-06-04 16:14:50,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:14:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:14:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-04 16:14:50,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2024-06-04 16:14:50,682 INFO L175 Difference]: Start difference. First operand has 183 places, 200 transitions, 2352 flow. Second operand 9 states and 214 transitions. [2024-06-04 16:14:50,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 239 transitions, 2942 flow [2024-06-04 16:14:50,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 239 transitions, 2825 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:50,808 INFO L231 Difference]: Finished difference. Result has 184 places, 201 transitions, 2358 flow [2024-06-04 16:14:50,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2243, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2358, PETRI_PLACES=184, PETRI_TRANSITIONS=201} [2024-06-04 16:14:50,808 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-04 16:14:50,809 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 201 transitions, 2358 flow [2024-06-04 16:14:50,809 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 16:14:50,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:50,809 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 16:14:50,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 16:14:50,809 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:50,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:50,810 INFO L85 PathProgramCache]: Analyzing trace with hash -390558422, now seen corresponding path program 2 times [2024-06-04 16:14:50,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:50,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307216277] [2024-06-04 16:14:50,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:50,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:51,010 INFO 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 16:14:51,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:51,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307216277] [2024-06-04 16:14:51,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307216277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:51,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:51,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:14:51,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462605696] [2024-06-04 16:14:51,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:51,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:14:51,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:51,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:14:51,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:14:51,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:51,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 201 transitions, 2358 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 16:14:51,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:51,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:51,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:51,520 INFO L124 PetriNetUnfolderBase]: 1757/3030 cut-off events. [2024-06-04 16:14:51,520 INFO L125 PetriNetUnfolderBase]: For 101806/101812 co-relation queries the response was YES. [2024-06-04 16:14:51,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17191 conditions, 3030 events. 1757/3030 cut-off events. For 101806/101812 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 18602 event pairs, 396 based on Foata normal form. 12/3035 useless extension candidates. Maximal degree in co-relation 17100. Up to 2323 conditions per place. [2024-06-04 16:14:51,546 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 192 selfloop transitions, 51 changer transitions 0/250 dead transitions. [2024-06-04 16:14:51,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 250 transitions, 3000 flow [2024-06-04 16:14:51,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:14:51,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:14:51,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-04 16:14:51,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-06-04 16:14:51,548 INFO L175 Difference]: Start difference. First operand has 184 places, 201 transitions, 2358 flow. Second operand 10 states and 244 transitions. [2024-06-04 16:14:51,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 250 transitions, 3000 flow [2024-06-04 16:14:51,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 250 transitions, 2915 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 16:14:51,705 INFO L231 Difference]: Finished difference. Result has 188 places, 202 transitions, 2407 flow [2024-06-04 16:14:51,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2273, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2407, PETRI_PLACES=188, PETRI_TRANSITIONS=202} [2024-06-04 16:14:51,706 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-04 16:14:51,706 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 202 transitions, 2407 flow [2024-06-04 16:14:51,706 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 16:14:51,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:51,706 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 16:14:51,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 16:14:51,707 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:51,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:51,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1293295816, now seen corresponding path program 3 times [2024-06-04 16:14:51,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:51,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276247891] [2024-06-04 16:14:51,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:51,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:51,913 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 16:14:51,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:51,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276247891] [2024-06-04 16:14:51,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276247891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:51,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:51,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:14:51,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656380320] [2024-06-04 16:14:51,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:51,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:14:51,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:51,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:14:51,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:14:51,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:51,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 202 transitions, 2407 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 16:14:51,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:51,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:51,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:52,464 INFO L124 PetriNetUnfolderBase]: 1798/3102 cut-off events. [2024-06-04 16:14:52,464 INFO L125 PetriNetUnfolderBase]: For 108494/108500 co-relation queries the response was YES. [2024-06-04 16:14:52,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17663 conditions, 3102 events. 1798/3102 cut-off events. For 108494/108500 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19233 event pairs, 414 based on Foata normal form. 16/3110 useless extension candidates. Maximal degree in co-relation 17570. Up to 2486 conditions per place. [2024-06-04 16:14:52,491 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 192 selfloop transitions, 49 changer transitions 0/248 dead transitions. [2024-06-04 16:14:52,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 248 transitions, 3039 flow [2024-06-04 16:14:52,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:14:52,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:14:52,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-04 16:14:52,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-04 16:14:52,503 INFO L175 Difference]: Start difference. First operand has 188 places, 202 transitions, 2407 flow. Second operand 10 states and 237 transitions. [2024-06-04 16:14:52,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 248 transitions, 3039 flow [2024-06-04 16:14:52,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 248 transitions, 2919 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:52,661 INFO L231 Difference]: Finished difference. Result has 190 places, 203 transitions, 2419 flow [2024-06-04 16:14:52,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2287, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2419, PETRI_PLACES=190, PETRI_TRANSITIONS=203} [2024-06-04 16:14:52,662 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-04 16:14:52,662 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 203 transitions, 2419 flow [2024-06-04 16:14:52,662 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 16:14:52,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:52,662 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 16:14:52,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 16:14:52,663 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:52,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:52,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1855156424, now seen corresponding path program 4 times [2024-06-04 16:14:52,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:52,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440761236] [2024-06-04 16:14:52,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:52,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:52,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:52,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440761236] [2024-06-04 16:14:52,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440761236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:52,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:52,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:14:52,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255807549] [2024-06-04 16:14:52,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:52,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:14:52,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:52,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:14:52,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:14:52,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:52,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 203 transitions, 2419 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 16:14:52,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:52,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:52,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:53,371 INFO L124 PetriNetUnfolderBase]: 1778/3080 cut-off events. [2024-06-04 16:14:53,371 INFO L125 PetriNetUnfolderBase]: For 102677/102683 co-relation queries the response was YES. [2024-06-04 16:14:53,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17049 conditions, 3080 events. 1778/3080 cut-off events. For 102677/102683 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 19106 event pairs, 359 based on Foata normal form. 16/3088 useless extension candidates. Maximal degree in co-relation 16955. Up to 1710 conditions per place. [2024-06-04 16:14:53,401 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 177 selfloop transitions, 60 changer transitions 0/244 dead transitions. [2024-06-04 16:14:53,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 244 transitions, 2935 flow [2024-06-04 16:14:53,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:14:53,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:14:53,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-04 16:14:53,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:14:53,402 INFO L175 Difference]: Start difference. First operand has 190 places, 203 transitions, 2419 flow. Second operand 9 states and 216 transitions. [2024-06-04 16:14:53,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 244 transitions, 2935 flow [2024-06-04 16:14:53,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 244 transitions, 2799 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-04 16:14:53,560 INFO L231 Difference]: Finished difference. Result has 189 places, 202 transitions, 2333 flow [2024-06-04 16:14:53,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2209, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2333, PETRI_PLACES=189, PETRI_TRANSITIONS=202} [2024-06-04 16:14:53,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-04 16:14:53,560 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 202 transitions, 2333 flow [2024-06-04 16:14:53,561 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 16:14:53,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:53,561 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 16:14:53,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 16:14:53,561 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 16:14:53,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:53,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1247397911, now seen corresponding path program 1 times [2024-06-04 16:14:53,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:53,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171914868] [2024-06-04 16:14:53,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:53,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:53,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:53,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171914868] [2024-06-04 16:14:53,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171914868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:53,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:53,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:14:53,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623367516] [2024-06-04 16:14:53,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:53,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:14:53,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:53,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:14:53,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:14:53,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:53,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 202 transitions, 2333 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 16:14:53,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:53,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:53,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:54,190 INFO L124 PetriNetUnfolderBase]: 1796/3079 cut-off events. [2024-06-04 16:14:54,190 INFO L125 PetriNetUnfolderBase]: For 94817/94817 co-relation queries the response was YES. [2024-06-04 16:14:54,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17186 conditions, 3079 events. 1796/3079 cut-off events. For 94817/94817 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 19021 event pairs, 430 based on Foata normal form. 2/3073 useless extension candidates. Maximal degree in co-relation 17092. Up to 2581 conditions per place. [2024-06-04 16:14:54,218 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 147 selfloop transitions, 79 changer transitions 0/233 dead transitions. [2024-06-04 16:14:54,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 233 transitions, 3215 flow [2024-06-04 16:14:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:14:54,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:14:54,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 16:14:54,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-04 16:14:54,219 INFO L175 Difference]: Start difference. First operand has 189 places, 202 transitions, 2333 flow. Second operand 7 states and 171 transitions. [2024-06-04 16:14:54,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 233 transitions, 3215 flow [2024-06-04 16:14:54,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 233 transitions, 3006 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-04 16:14:54,366 INFO L231 Difference]: Finished difference. Result has 187 places, 213 transitions, 2421 flow [2024-06-04 16:14:54,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2124, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2421, PETRI_PLACES=187, PETRI_TRANSITIONS=213} [2024-06-04 16:14:54,366 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-04 16:14:54,367 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 213 transitions, 2421 flow [2024-06-04 16:14:54,367 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 16:14:54,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:54,367 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 16:14:54,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 16:14:54,367 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 16:14:54,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:54,367 INFO L85 PathProgramCache]: Analyzing trace with hash 418301511, now seen corresponding path program 2 times [2024-06-04 16:14:54,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:54,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812031697] [2024-06-04 16:14:54,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:54,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:54,570 INFO 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 16:14:54,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:54,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812031697] [2024-06-04 16:14:54,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812031697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:54,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:54,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:14:54,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909973190] [2024-06-04 16:14:54,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:54,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:14:54,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:54,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:14:54,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:14:54,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:54,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 213 transitions, 2421 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 16:14:54,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:54,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:54,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:55,040 INFO L124 PetriNetUnfolderBase]: 1822/3126 cut-off events. [2024-06-04 16:14:55,040 INFO L125 PetriNetUnfolderBase]: For 100153/100153 co-relation queries the response was YES. [2024-06-04 16:14:55,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17284 conditions, 3126 events. 1822/3126 cut-off events. For 100153/100153 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 19329 event pairs, 419 based on Foata normal form. 2/3121 useless extension candidates. Maximal degree in co-relation 17191. Up to 2724 conditions per place. [2024-06-04 16:14:55,066 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 165 selfloop transitions, 66 changer transitions 0/238 dead transitions. [2024-06-04 16:14:55,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 238 transitions, 3295 flow [2024-06-04 16:14:55,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:14:55,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:14:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 16:14:55,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-04 16:14:55,068 INFO L175 Difference]: Start difference. First operand has 187 places, 213 transitions, 2421 flow. Second operand 7 states and 167 transitions. [2024-06-04 16:14:55,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 238 transitions, 3295 flow [2024-06-04 16:14:55,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 238 transitions, 3158 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-04 16:14:55,229 INFO L231 Difference]: Finished difference. Result has 191 places, 221 transitions, 2539 flow [2024-06-04 16:14:55,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2300, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2539, PETRI_PLACES=191, PETRI_TRANSITIONS=221} [2024-06-04 16:14:55,230 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-04 16:14:55,230 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 221 transitions, 2539 flow [2024-06-04 16:14:55,230 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 16:14:55,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:55,230 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 16:14:55,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 16:14:55,230 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 16:14:55,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:55,231 INFO L85 PathProgramCache]: Analyzing trace with hash 418307091, now seen corresponding path program 3 times [2024-06-04 16:14:55,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:55,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177322963] [2024-06-04 16:14:55,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:55,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:55,435 INFO 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 16:14:55,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:55,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177322963] [2024-06-04 16:14:55,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177322963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:55,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:55,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:14:55,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394122101] [2024-06-04 16:14:55,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:55,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:14:55,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:55,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:14:55,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:14:55,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:55,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 221 transitions, 2539 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 16:14:55,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:55,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:55,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:55,870 INFO L124 PetriNetUnfolderBase]: 1816/3118 cut-off events. [2024-06-04 16:14:55,870 INFO L125 PetriNetUnfolderBase]: For 102514/102514 co-relation queries the response was YES. [2024-06-04 16:14:55,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17243 conditions, 3118 events. 1816/3118 cut-off events. For 102514/102514 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 19310 event pairs, 419 based on Foata normal form. 2/3113 useless extension candidates. Maximal degree in co-relation 17148. Up to 2718 conditions per place. [2024-06-04 16:14:55,900 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 165 selfloop transitions, 67 changer transitions 0/239 dead transitions. [2024-06-04 16:14:55,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 239 transitions, 3225 flow [2024-06-04 16:14:55,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:14:55,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:14:55,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-04 16:14:55,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-06-04 16:14:55,901 INFO L175 Difference]: Start difference. First operand has 191 places, 221 transitions, 2539 flow. Second operand 9 states and 202 transitions. [2024-06-04 16:14:55,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 239 transitions, 3225 flow [2024-06-04 16:14:56,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 239 transitions, 3101 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-04 16:14:56,043 INFO L231 Difference]: Finished difference. Result has 197 places, 221 transitions, 2556 flow [2024-06-04 16:14:56,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2415, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2556, PETRI_PLACES=197, PETRI_TRANSITIONS=221} [2024-06-04 16:14:56,043 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-04 16:14:56,043 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 221 transitions, 2556 flow [2024-06-04 16:14:56,044 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 16:14:56,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:56,044 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 16:14:56,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 16:14:56,044 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 16:14:56,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:56,044 INFO L85 PathProgramCache]: Analyzing trace with hash 568817961, now seen corresponding path program 4 times [2024-06-04 16:14:56,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:56,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519205813] [2024-06-04 16:14:56,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:56,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:56,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:56,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:56,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519205813] [2024-06-04 16:14:56,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519205813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:56,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:56,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:14:56,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542639546] [2024-06-04 16:14:56,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:56,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:14:56,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:56,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:14:56,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:14:56,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:56,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 221 transitions, 2556 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 16:14:56,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:56,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:56,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:56,697 INFO L124 PetriNetUnfolderBase]: 1834/3149 cut-off events. [2024-06-04 16:14:56,697 INFO L125 PetriNetUnfolderBase]: For 107719/107719 co-relation queries the response was YES. [2024-06-04 16:14:56,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17665 conditions, 3149 events. 1834/3149 cut-off events. For 107719/107719 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 19543 event pairs, 419 based on Foata normal form. 2/3144 useless extension candidates. Maximal degree in co-relation 17568. Up to 2647 conditions per place. [2024-06-04 16:14:56,727 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 153 selfloop transitions, 92 changer transitions 0/252 dead transitions. [2024-06-04 16:14:56,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 252 transitions, 3564 flow [2024-06-04 16:14:56,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:14:56,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:14:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-04 16:14:56,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 16:14:56,729 INFO L175 Difference]: Start difference. First operand has 197 places, 221 transitions, 2556 flow. Second operand 7 states and 175 transitions. [2024-06-04 16:14:56,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 252 transitions, 3564 flow [2024-06-04 16:14:56,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 252 transitions, 3419 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:56,945 INFO L231 Difference]: Finished difference. Result has 197 places, 228 transitions, 2730 flow [2024-06-04 16:14:56,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2411, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2730, PETRI_PLACES=197, PETRI_TRANSITIONS=228} [2024-06-04 16:14:56,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-04 16:14:56,946 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 228 transitions, 2730 flow [2024-06-04 16:14:56,946 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 16:14:56,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:56,946 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 16:14:56,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 16:14:56,946 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 16:14:56,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:56,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1760165631, now seen corresponding path program 5 times [2024-06-04 16:14:56,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:56,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939785132] [2024-06-04 16:14:56,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:56,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:57,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:57,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939785132] [2024-06-04 16:14:57,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939785132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:57,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:57,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:14:57,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439690764] [2024-06-04 16:14:57,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:57,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:14:57,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:57,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:14:57,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:14:57,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:57,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 228 transitions, 2730 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 16:14:57,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:57,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:57,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:57,648 INFO L124 PetriNetUnfolderBase]: 1844/3167 cut-off events. [2024-06-04 16:14:57,648 INFO L125 PetriNetUnfolderBase]: For 112555/112555 co-relation queries the response was YES. [2024-06-04 16:14:57,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18018 conditions, 3167 events. 1844/3167 cut-off events. For 112555/112555 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 19677 event pairs, 419 based on Foata normal form. 2/3162 useless extension candidates. Maximal degree in co-relation 17919. Up to 2657 conditions per place. [2024-06-04 16:14:57,678 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 153 selfloop transitions, 98 changer transitions 0/258 dead transitions. [2024-06-04 16:14:57,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 258 transitions, 3733 flow [2024-06-04 16:14:57,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:14:57,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:14:57,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-04 16:14:57,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-04 16:14:57,680 INFO L175 Difference]: Start difference. First operand has 197 places, 228 transitions, 2730 flow. Second operand 9 states and 213 transitions. [2024-06-04 16:14:57,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 258 transitions, 3733 flow [2024-06-04 16:14:57,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 258 transitions, 3520 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-04 16:14:57,933 INFO L231 Difference]: Finished difference. Result has 201 places, 232 transitions, 2796 flow [2024-06-04 16:14:57,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2532, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2796, PETRI_PLACES=201, PETRI_TRANSITIONS=232} [2024-06-04 16:14:57,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-04 16:14:57,934 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 232 transitions, 2796 flow [2024-06-04 16:14:57,934 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 16:14:57,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:57,935 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 16:14:57,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 16:14:57,935 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 16:14:57,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:57,935 INFO L85 PathProgramCache]: Analyzing trace with hash 576175191, now seen corresponding path program 6 times [2024-06-04 16:14:57,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:57,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475237015] [2024-06-04 16:14:57,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:57,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:58,152 INFO 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 16:14:58,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:58,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475237015] [2024-06-04 16:14:58,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475237015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:58,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:58,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:14:58,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773277434] [2024-06-04 16:14:58,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:58,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:14:58,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:58,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:14:58,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:14:58,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:58,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 232 transitions, 2796 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 16:14:58,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:58,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:58,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:58,693 INFO L124 PetriNetUnfolderBase]: 1877/3233 cut-off events. [2024-06-04 16:14:58,693 INFO L125 PetriNetUnfolderBase]: For 113200/113200 co-relation queries the response was YES. [2024-06-04 16:14:58,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18501 conditions, 3233 events. 1877/3233 cut-off events. For 113200/113200 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20174 event pairs, 398 based on Foata normal form. 2/3232 useless extension candidates. Maximal degree in co-relation 18402. Up to 2813 conditions per place. [2024-06-04 16:14:58,723 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 213 selfloop transitions, 53 changer transitions 0/273 dead transitions. [2024-06-04 16:14:58,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 273 transitions, 3781 flow [2024-06-04 16:14:58,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:14:58,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:14:58,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-04 16:14:58,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-04 16:14:58,724 INFO L175 Difference]: Start difference. First operand has 201 places, 232 transitions, 2796 flow. Second operand 6 states and 156 transitions. [2024-06-04 16:14:58,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 273 transitions, 3781 flow [2024-06-04 16:14:58,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 273 transitions, 3514 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:58,987 INFO L231 Difference]: Finished difference. Result has 201 places, 249 transitions, 3016 flow [2024-06-04 16:14:58,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3016, PETRI_PLACES=201, PETRI_TRANSITIONS=249} [2024-06-04 16:14:58,987 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-04 16:14:58,987 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 249 transitions, 3016 flow [2024-06-04 16:14:58,988 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 16:14:58,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:58,988 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 16:14:58,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 16:14:58,988 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 16:14:58,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:58,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1474843863, now seen corresponding path program 1 times [2024-06-04 16:14:58,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:58,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473599647] [2024-06-04 16:14:58,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:58,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:59,270 INFO 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 16:14:59,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:59,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473599647] [2024-06-04 16:14:59,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473599647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:59,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:59,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:59,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813064342] [2024-06-04 16:14:59,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:59,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:59,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:59,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:59,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:59,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:59,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 249 transitions, 3016 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 16:14:59,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:59,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:59,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:59,803 INFO L124 PetriNetUnfolderBase]: 1905/3285 cut-off events. [2024-06-04 16:14:59,803 INFO L125 PetriNetUnfolderBase]: For 115917/115923 co-relation queries the response was YES. [2024-06-04 16:14:59,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18765 conditions, 3285 events. 1905/3285 cut-off events. For 115917/115923 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 20670 event pairs, 415 based on Foata normal form. 6/3286 useless extension candidates. Maximal degree in co-relation 18664. Up to 2729 conditions per place. [2024-06-04 16:14:59,835 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 202 selfloop transitions, 86 changer transitions 0/295 dead transitions. [2024-06-04 16:14:59,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 295 transitions, 4187 flow [2024-06-04 16:14:59,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:14:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:14:59,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-04 16:14:59,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 16:14:59,836 INFO L175 Difference]: Start difference. First operand has 201 places, 249 transitions, 3016 flow. Second operand 8 states and 200 transitions. [2024-06-04 16:14:59,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 295 transitions, 4187 flow [2024-06-04 16:15:00,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 295 transitions, 4081 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:00,082 INFO L231 Difference]: Finished difference. Result has 207 places, 264 transitions, 3247 flow [2024-06-04 16:15:00,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3247, PETRI_PLACES=207, PETRI_TRANSITIONS=264} [2024-06-04 16:15:00,083 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-04 16:15:00,083 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 264 transitions, 3247 flow [2024-06-04 16:15:00,084 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 16:15:00,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:00,084 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 16:15:00,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 16:15:00,084 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 16:15:00,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:00,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1149716793, now seen corresponding path program 2 times [2024-06-04 16:15:00,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:00,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225928846] [2024-06-04 16:15:00,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:00,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:00,313 INFO 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 16:15:00,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:00,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225928846] [2024-06-04 16:15:00,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225928846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:00,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:00,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:00,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268027649] [2024-06-04 16:15:00,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:00,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:00,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:00,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:00,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:00,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:00,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 264 transitions, 3247 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 16:15:00,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:00,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:00,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:00,842 INFO L124 PetriNetUnfolderBase]: 1941/3347 cut-off events. [2024-06-04 16:15:00,842 INFO L125 PetriNetUnfolderBase]: For 123916/123922 co-relation queries the response was YES. [2024-06-04 16:15:00,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19646 conditions, 3347 events. 1941/3347 cut-off events. For 123916/123922 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 21128 event pairs, 415 based on Foata normal form. 6/3348 useless extension candidates. Maximal degree in co-relation 19543. Up to 2760 conditions per place. [2024-06-04 16:15:00,875 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 204 selfloop transitions, 100 changer transitions 0/311 dead transitions. [2024-06-04 16:15:00,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 311 transitions, 4558 flow [2024-06-04 16:15:00,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:15:00,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:15:00,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 258 transitions. [2024-06-04 16:15:00,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-04 16:15:00,877 INFO L175 Difference]: Start difference. First operand has 207 places, 264 transitions, 3247 flow. Second operand 11 states and 258 transitions. [2024-06-04 16:15:00,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 311 transitions, 4558 flow [2024-06-04 16:15:01,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 311 transitions, 4409 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:01,134 INFO L231 Difference]: Finished difference. Result has 217 places, 276 transitions, 3456 flow [2024-06-04 16:15:01,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3118, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3456, PETRI_PLACES=217, PETRI_TRANSITIONS=276} [2024-06-04 16:15:01,134 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-04 16:15:01,135 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 276 transitions, 3456 flow [2024-06-04 16:15:01,135 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 16:15:01,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:01,135 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 16:15:01,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 16:15:01,135 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 16:15:01,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:01,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1150102743, now seen corresponding path program 3 times [2024-06-04 16:15:01,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:01,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546334842] [2024-06-04 16:15:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:01,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:01,364 INFO 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 16:15:01,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:01,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546334842] [2024-06-04 16:15:01,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546334842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:01,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:01,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:01,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917382158] [2024-06-04 16:15:01,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:01,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:01,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:01,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:01,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:01,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:01,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 276 transitions, 3456 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 16:15:01,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:01,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:01,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:01,995 INFO L124 PetriNetUnfolderBase]: 1935/3339 cut-off events. [2024-06-04 16:15:01,995 INFO L125 PetriNetUnfolderBase]: For 126102/126108 co-relation queries the response was YES. [2024-06-04 16:15:02,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19829 conditions, 3339 events. 1935/3339 cut-off events. For 126102/126108 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 21081 event pairs, 415 based on Foata normal form. 6/3340 useless extension candidates. Maximal degree in co-relation 19723. Up to 2755 conditions per place. [2024-06-04 16:15:02,023 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 204 selfloop transitions, 98 changer transitions 0/309 dead transitions. [2024-06-04 16:15:02,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 309 transitions, 4532 flow [2024-06-04 16:15:02,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:02,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:02,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-04 16:15:02,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738095238095238 [2024-06-04 16:15:02,024 INFO L175 Difference]: Start difference. First operand has 217 places, 276 transitions, 3456 flow. Second operand 10 states and 241 transitions. [2024-06-04 16:15:02,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 309 transitions, 4532 flow [2024-06-04 16:15:02,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 309 transitions, 4318 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:02,276 INFO L231 Difference]: Finished difference. Result has 221 places, 276 transitions, 3445 flow [2024-06-04 16:15:02,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3242, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3445, PETRI_PLACES=221, PETRI_TRANSITIONS=276} [2024-06-04 16:15:02,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-04 16:15:02,277 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 276 transitions, 3445 flow [2024-06-04 16:15:02,277 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 16:15:02,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:02,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:02,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 16:15:02,277 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 16:15:02,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:02,278 INFO L85 PathProgramCache]: Analyzing trace with hash 105029785, now seen corresponding path program 1 times [2024-06-04 16:15:02,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:02,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757227293] [2024-06-04 16:15:02,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:02,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:02,486 INFO 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 16:15:02,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:02,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757227293] [2024-06-04 16:15:02,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757227293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:02,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:02,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:02,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831171231] [2024-06-04 16:15:02,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:02,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:02,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:02,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:02,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:02,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:02,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 276 transitions, 3445 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 16:15:02,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:02,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:02,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:02,982 INFO L124 PetriNetUnfolderBase]: 1940/3345 cut-off events. [2024-06-04 16:15:02,983 INFO L125 PetriNetUnfolderBase]: For 129488/129494 co-relation queries the response was YES. [2024-06-04 16:15:03,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19975 conditions, 3345 events. 1940/3345 cut-off events. For 129488/129494 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 21121 event pairs, 416 based on Foata normal form. 5/3345 useless extension candidates. Maximal degree in co-relation 19868. Up to 2902 conditions per place. [2024-06-04 16:15:03,017 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 230 selfloop transitions, 61 changer transitions 0/298 dead transitions. [2024-06-04 16:15:03,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 298 transitions, 4333 flow [2024-06-04 16:15:03,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:03,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:03,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 16:15:03,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-04 16:15:03,019 INFO L175 Difference]: Start difference. First operand has 221 places, 276 transitions, 3445 flow. Second operand 7 states and 166 transitions. [2024-06-04 16:15:03,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 298 transitions, 4333 flow [2024-06-04 16:15:03,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 298 transitions, 4099 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-04 16:15:03,308 INFO L231 Difference]: Finished difference. Result has 218 places, 279 transitions, 3399 flow [2024-06-04 16:15:03,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3217, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3399, PETRI_PLACES=218, PETRI_TRANSITIONS=279} [2024-06-04 16:15:03,308 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-04 16:15:03,308 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 279 transitions, 3399 flow [2024-06-04 16:15:03,309 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 16:15:03,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:03,309 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 16:15:03,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 16:15:03,309 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 16:15:03,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:03,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1149702905, now seen corresponding path program 1 times [2024-06-04 16:15:03,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:03,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113138223] [2024-06-04 16:15:03,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:03,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:03,517 INFO 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 16:15:03,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:03,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113138223] [2024-06-04 16:15:03,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113138223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:03,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:03,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:03,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033647188] [2024-06-04 16:15:03,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:03,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:03,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:03,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:03,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:03,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:03,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 279 transitions, 3399 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 16:15:03,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:03,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:03,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:04,003 INFO L124 PetriNetUnfolderBase]: 1956/3369 cut-off events. [2024-06-04 16:15:04,003 INFO L125 PetriNetUnfolderBase]: For 137889/137895 co-relation queries the response was YES. [2024-06-04 16:15:04,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20055 conditions, 3369 events. 1956/3369 cut-off events. For 137889/137895 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 21245 event pairs, 417 based on Foata normal form. 8/3372 useless extension candidates. Maximal degree in co-relation 19948. Up to 2914 conditions per place. [2024-06-04 16:15:04,039 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 231 selfloop transitions, 64 changer transitions 0/302 dead transitions. [2024-06-04 16:15:04,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 302 transitions, 4293 flow [2024-06-04 16:15:04,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:04,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:04,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 16:15:04,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-04 16:15:04,040 INFO L175 Difference]: Start difference. First operand has 218 places, 279 transitions, 3399 flow. Second operand 7 states and 167 transitions. [2024-06-04 16:15:04,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 302 transitions, 4293 flow [2024-06-04 16:15:04,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 302 transitions, 4181 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:04,348 INFO L231 Difference]: Finished difference. Result has 221 places, 282 transitions, 3479 flow [2024-06-04 16:15:04,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3287, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3479, PETRI_PLACES=221, PETRI_TRANSITIONS=282} [2024-06-04 16:15:04,349 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-04 16:15:04,349 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 282 transitions, 3479 flow [2024-06-04 16:15:04,349 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 16:15:04,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:04,349 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 16:15:04,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 16:15:04,350 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 16:15:04,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:04,350 INFO L85 PathProgramCache]: Analyzing trace with hash 674882755, now seen corresponding path program 4 times [2024-06-04 16:15:04,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:04,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101040727] [2024-06-04 16:15:04,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:04,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:04,587 INFO 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 16:15:04,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:04,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101040727] [2024-06-04 16:15:04,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101040727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:04,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:04,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:04,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640609731] [2024-06-04 16:15:04,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:04,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:04,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:04,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:04,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:04,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:04,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 282 transitions, 3479 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 16:15:04,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:04,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:04,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:05,186 INFO L124 PetriNetUnfolderBase]: 1974/3398 cut-off events. [2024-06-04 16:15:05,187 INFO L125 PetriNetUnfolderBase]: For 141245/141245 co-relation queries the response was YES. [2024-06-04 16:15:05,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20450 conditions, 3398 events. 1974/3398 cut-off events. For 141245/141245 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 21407 event pairs, 396 based on Foata normal form. 2/3397 useless extension candidates. Maximal degree in co-relation 20341. Up to 2900 conditions per place. [2024-06-04 16:15:05,217 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 238 selfloop transitions, 70 changer transitions 0/315 dead transitions. [2024-06-04 16:15:05,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 315 transitions, 4331 flow [2024-06-04 16:15:05,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:05,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:05,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-04 16:15:05,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-04 16:15:05,219 INFO L175 Difference]: Start difference. First operand has 221 places, 282 transitions, 3479 flow. Second operand 6 states and 159 transitions. [2024-06-04 16:15:05,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 315 transitions, 4331 flow [2024-06-04 16:15:05,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 315 transitions, 4161 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:05,526 INFO L231 Difference]: Finished difference. Result has 223 places, 289 transitions, 3593 flow [2024-06-04 16:15:05,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3309, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3593, PETRI_PLACES=223, PETRI_TRANSITIONS=289} [2024-06-04 16:15:05,526 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-04 16:15:05,526 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 289 transitions, 3593 flow [2024-06-04 16:15:05,527 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 16:15:05,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:05,527 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 16:15:05,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 16:15:05,527 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 16:15:05,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:05,527 INFO L85 PathProgramCache]: Analyzing trace with hash 246786085, now seen corresponding path program 5 times [2024-06-04 16:15:05,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:05,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817352280] [2024-06-04 16:15:05,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:05,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:05,753 INFO 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 16:15:05,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:05,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817352280] [2024-06-04 16:15:05,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817352280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:05,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:05,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:05,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823451502] [2024-06-04 16:15:05,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:05,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:05,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:05,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:05,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:05,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:05,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 289 transitions, 3593 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 16:15:05,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:05,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:05,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:06,335 INFO L124 PetriNetUnfolderBase]: 1992/3432 cut-off events. [2024-06-04 16:15:06,335 INFO L125 PetriNetUnfolderBase]: For 149183/149189 co-relation queries the response was YES. [2024-06-04 16:15:06,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20844 conditions, 3432 events. 1992/3432 cut-off events. For 149183/149189 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 21699 event pairs, 416 based on Foata normal form. 6/3433 useless extension candidates. Maximal degree in co-relation 20733. Up to 2821 conditions per place. [2024-06-04 16:15:06,372 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 204 selfloop transitions, 118 changer transitions 0/329 dead transitions. [2024-06-04 16:15:06,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 329 transitions, 4927 flow [2024-06-04 16:15:06,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:06,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:06,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-04 16:15:06,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582010582010582 [2024-06-04 16:15:06,373 INFO L175 Difference]: Start difference. First operand has 223 places, 289 transitions, 3593 flow. Second operand 9 states and 220 transitions. [2024-06-04 16:15:06,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 329 transitions, 4927 flow [2024-06-04 16:15:06,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 329 transitions, 4835 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:06,666 INFO L231 Difference]: Finished difference. Result has 229 places, 296 transitions, 3829 flow [2024-06-04 16:15:06,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3501, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3829, PETRI_PLACES=229, PETRI_TRANSITIONS=296} [2024-06-04 16:15:06,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-04 16:15:06,667 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 296 transitions, 3829 flow [2024-06-04 16:15:06,667 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 16:15:06,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:06,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:06,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 16:15:06,668 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 16:15:06,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:06,668 INFO L85 PathProgramCache]: Analyzing trace with hash 246400135, now seen corresponding path program 6 times [2024-06-04 16:15:06,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:06,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333230344] [2024-06-04 16:15:06,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:06,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:06,906 INFO 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 16:15:06,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:06,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333230344] [2024-06-04 16:15:06,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333230344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:06,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:06,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:06,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191030871] [2024-06-04 16:15:06,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:06,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:06,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:06,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:06,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:06,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:06,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 296 transitions, 3829 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 16:15:06,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:06,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:06,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:07,477 INFO L124 PetriNetUnfolderBase]: 1986/3424 cut-off events. [2024-06-04 16:15:07,477 INFO L125 PetriNetUnfolderBase]: For 152160/152166 co-relation queries the response was YES. [2024-06-04 16:15:07,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20994 conditions, 3424 events. 1986/3424 cut-off events. For 152160/152166 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 21682 event pairs, 416 based on Foata normal form. 6/3425 useless extension candidates. Maximal degree in co-relation 20882. Up to 2816 conditions per place. [2024-06-04 16:15:07,515 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 204 selfloop transitions, 115 changer transitions 0/326 dead transitions. [2024-06-04 16:15:07,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 326 transitions, 4973 flow [2024-06-04 16:15:07,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:07,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:07,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-04 16:15:07,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-04 16:15:07,517 INFO L175 Difference]: Start difference. First operand has 229 places, 296 transitions, 3829 flow. Second operand 7 states and 181 transitions. [2024-06-04 16:15:07,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 326 transitions, 4973 flow [2024-06-04 16:15:07,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 326 transitions, 4711 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:07,793 INFO L231 Difference]: Finished difference. Result has 230 places, 296 transitions, 3822 flow [2024-06-04 16:15:07,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3575, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3822, PETRI_PLACES=230, PETRI_TRANSITIONS=296} [2024-06-04 16:15:07,794 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-04 16:15:07,794 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 296 transitions, 3822 flow [2024-06-04 16:15:07,795 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 16:15:07,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:07,795 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 16:15:07,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 16:15:07,795 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 16:15:07,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:07,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1436780941, now seen corresponding path program 1 times [2024-06-04 16:15:07,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:07,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764362508] [2024-06-04 16:15:07,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:07,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:07,986 INFO 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 16:15:07,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:07,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764362508] [2024-06-04 16:15:07,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764362508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:07,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:07,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:07,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756303270] [2024-06-04 16:15:07,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:07,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:07,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:07,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:07,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:08,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:08,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 296 transitions, 3822 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:08,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:08,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:08,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:08,523 INFO L124 PetriNetUnfolderBase]: 2007/3454 cut-off events. [2024-06-04 16:15:08,523 INFO L125 PetriNetUnfolderBase]: For 154341/154347 co-relation queries the response was YES. [2024-06-04 16:15:08,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21317 conditions, 3454 events. 2007/3454 cut-off events. For 154341/154347 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21857 event pairs, 423 based on Foata normal form. 1/3448 useless extension candidates. Maximal degree in co-relation 21205. Up to 2969 conditions per place. [2024-06-04 16:15:08,555 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 251 selfloop transitions, 68 changer transitions 0/326 dead transitions. [2024-06-04 16:15:08,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 326 transitions, 4878 flow [2024-06-04 16:15:08,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:08,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-04 16:15:08,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 16:15:08,557 INFO L175 Difference]: Start difference. First operand has 230 places, 296 transitions, 3822 flow. Second operand 6 states and 150 transitions. [2024-06-04 16:15:08,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 326 transitions, 4878 flow [2024-06-04 16:15:08,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 326 transitions, 4626 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:08,821 INFO L231 Difference]: Finished difference. Result has 228 places, 305 transitions, 3870 flow [2024-06-04 16:15:08,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3578, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3870, PETRI_PLACES=228, PETRI_TRANSITIONS=305} [2024-06-04 16:15:08,822 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-04 16:15:08,822 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 305 transitions, 3870 flow [2024-06-04 16:15:08,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:08,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:08,822 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 16:15:08,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 16:15:08,822 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 16:15:08,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:08,823 INFO L85 PathProgramCache]: Analyzing trace with hash -283403825, now seen corresponding path program 2 times [2024-06-04 16:15:08,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:08,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984175729] [2024-06-04 16:15:08,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:08,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:09,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:09,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984175729] [2024-06-04 16:15:09,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984175729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:09,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:09,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:09,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929875675] [2024-06-04 16:15:09,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:09,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:09,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:09,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:09,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:09,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:09,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 305 transitions, 3870 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:09,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:09,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:09,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:09,550 INFO L124 PetriNetUnfolderBase]: 2012/3465 cut-off events. [2024-06-04 16:15:09,550 INFO L125 PetriNetUnfolderBase]: For 148983/148989 co-relation queries the response was YES. [2024-06-04 16:15:09,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21125 conditions, 3465 events. 2012/3465 cut-off events. For 148983/148989 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 21963 event pairs, 408 based on Foata normal form. 5/3465 useless extension candidates. Maximal degree in co-relation 21014. Up to 3057 conditions per place. [2024-06-04 16:15:09,586 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 282 selfloop transitions, 35 changer transitions 0/324 dead transitions. [2024-06-04 16:15:09,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 324 transitions, 4600 flow [2024-06-04 16:15:09,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:09,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:09,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-04 16:15:09,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-06-04 16:15:09,587 INFO L175 Difference]: Start difference. First operand has 228 places, 305 transitions, 3870 flow. Second operand 6 states and 143 transitions. [2024-06-04 16:15:09,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 324 transitions, 4600 flow [2024-06-04 16:15:09,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 324 transitions, 4430 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:09,861 INFO L231 Difference]: Finished difference. Result has 231 places, 308 transitions, 3838 flow [2024-06-04 16:15:09,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3706, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3838, PETRI_PLACES=231, PETRI_TRANSITIONS=308} [2024-06-04 16:15:09,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-04 16:15:09,862 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 308 transitions, 3838 flow [2024-06-04 16:15:09,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:09,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:09,863 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 16:15:09,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 16:15:09,863 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 16:15:09,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:09,863 INFO L85 PathProgramCache]: Analyzing trace with hash -27023285, now seen corresponding path program 3 times [2024-06-04 16:15:09,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:09,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271112945] [2024-06-04 16:15:09,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:09,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:10,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:10,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271112945] [2024-06-04 16:15:10,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271112945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:10,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:10,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:10,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132071896] [2024-06-04 16:15:10,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:10,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:10,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:10,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:10,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:10,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:10,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 308 transitions, 3838 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:10,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:10,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:10,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:10,692 INFO L124 PetriNetUnfolderBase]: 2017/3468 cut-off events. [2024-06-04 16:15:10,693 INFO L125 PetriNetUnfolderBase]: For 154281/154287 co-relation queries the response was YES. [2024-06-04 16:15:10,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21164 conditions, 3468 events. 2017/3468 cut-off events. For 154281/154287 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 21998 event pairs, 424 based on Foata normal form. 5/3465 useless extension candidates. Maximal degree in co-relation 21053. Up to 2981 conditions per place. [2024-06-04 16:15:10,733 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 252 selfloop transitions, 70 changer transitions 0/329 dead transitions. [2024-06-04 16:15:10,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 329 transitions, 4792 flow [2024-06-04 16:15:10,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:10,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:10,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-04 16:15:10,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-04 16:15:10,735 INFO L175 Difference]: Start difference. First operand has 231 places, 308 transitions, 3838 flow. Second operand 6 states and 145 transitions. [2024-06-04 16:15:10,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 329 transitions, 4792 flow [2024-06-04 16:15:11,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 329 transitions, 4692 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:11,021 INFO L231 Difference]: Finished difference. Result has 232 places, 311 transitions, 3934 flow [2024-06-04 16:15:11,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3738, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3934, PETRI_PLACES=232, PETRI_TRANSITIONS=311} [2024-06-04 16:15:11,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-04 16:15:11,021 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 311 transitions, 3934 flow [2024-06-04 16:15:11,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:11,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:11,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:11,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 16:15:11,022 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 16:15:11,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:11,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1471358611, now seen corresponding path program 4 times [2024-06-04 16:15:11,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:11,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164494800] [2024-06-04 16:15:11,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:11,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:11,227 INFO 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 16:15:11,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:11,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164494800] [2024-06-04 16:15:11,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164494800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:11,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:11,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:11,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299532030] [2024-06-04 16:15:11,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:11,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:11,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:11,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:11,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:11,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:11,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 311 transitions, 3934 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:11,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:11,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:11,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:11,725 INFO L124 PetriNetUnfolderBase]: 2014/3464 cut-off events. [2024-06-04 16:15:11,725 INFO L125 PetriNetUnfolderBase]: For 157721/157727 co-relation queries the response was YES. [2024-06-04 16:15:11,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21247 conditions, 3464 events. 2014/3464 cut-off events. For 157721/157727 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 21969 event pairs, 424 based on Foata normal form. 5/3461 useless extension candidates. Maximal degree in co-relation 21136. Up to 2978 conditions per place. [2024-06-04 16:15:11,762 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 249 selfloop transitions, 69 changer transitions 0/325 dead transitions. [2024-06-04 16:15:11,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 325 transitions, 4714 flow [2024-06-04 16:15:11,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:11,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:11,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-04 16:15:11,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:15:11,763 INFO L175 Difference]: Start difference. First operand has 232 places, 311 transitions, 3934 flow. Second operand 6 states and 141 transitions. [2024-06-04 16:15:11,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 325 transitions, 4714 flow [2024-06-04 16:15:12,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 325 transitions, 4514 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:12,060 INFO L231 Difference]: Finished difference. Result has 234 places, 311 transitions, 3878 flow [2024-06-04 16:15:12,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3734, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3878, PETRI_PLACES=234, PETRI_TRANSITIONS=311} [2024-06-04 16:15:12,061 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-04 16:15:12,061 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 311 transitions, 3878 flow [2024-06-04 16:15:12,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:12,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:12,061 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 16:15:12,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 16:15:12,062 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 16:15:12,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:12,062 INFO L85 PathProgramCache]: Analyzing trace with hash 621287301, now seen corresponding path program 2 times [2024-06-04 16:15:12,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:12,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770438213] [2024-06-04 16:15:12,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:12,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:12,282 INFO 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 16:15:12,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:12,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770438213] [2024-06-04 16:15:12,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770438213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:12,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:12,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:12,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562165619] [2024-06-04 16:15:12,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:12,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:12,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:12,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:12,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:12,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:12,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 311 transitions, 3878 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 16:15:12,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:12,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:12,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:12,791 INFO L124 PetriNetUnfolderBase]: 2019/3468 cut-off events. [2024-06-04 16:15:12,791 INFO L125 PetriNetUnfolderBase]: For 161230/161230 co-relation queries the response was YES. [2024-06-04 16:15:12,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21348 conditions, 3468 events. 2019/3468 cut-off events. For 161230/161230 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 21954 event pairs, 418 based on Foata normal form. 1/3462 useless extension candidates. Maximal degree in co-relation 21236. Up to 3013 conditions per place. [2024-06-04 16:15:12,829 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 259 selfloop transitions, 64 changer transitions 0/330 dead transitions. [2024-06-04 16:15:12,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 330 transitions, 4844 flow [2024-06-04 16:15:12,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:12,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 16:15:12,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-04 16:15:12,830 INFO L175 Difference]: Start difference. First operand has 234 places, 311 transitions, 3878 flow. Second operand 7 states and 163 transitions. [2024-06-04 16:15:12,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 330 transitions, 4844 flow [2024-06-04 16:15:13,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 330 transitions, 4659 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:13,127 INFO L231 Difference]: Finished difference. Result has 236 places, 314 transitions, 3885 flow [2024-06-04 16:15:13,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3693, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3885, PETRI_PLACES=236, PETRI_TRANSITIONS=314} [2024-06-04 16:15:13,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-04 16:15:13,128 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 314 transitions, 3885 flow [2024-06-04 16:15:13,128 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 16:15:13,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:13,128 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 16:15:13,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 16:15:13,129 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 16:15:13,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:13,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1492685043, now seen corresponding path program 5 times [2024-06-04 16:15:13,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:13,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038007009] [2024-06-04 16:15:13,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:13,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:13,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:13,326 INFO 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 16:15:13,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:13,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038007009] [2024-06-04 16:15:13,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038007009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:13,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:13,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:13,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238595546] [2024-06-04 16:15:13,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:13,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:13,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:13,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:13,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:13,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:13,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 314 transitions, 3885 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:13,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:13,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:13,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:13,862 INFO L124 PetriNetUnfolderBase]: 2013/3465 cut-off events. [2024-06-04 16:15:13,862 INFO L125 PetriNetUnfolderBase]: For 165710/165716 co-relation queries the response was YES. [2024-06-04 16:15:13,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21170 conditions, 3465 events. 2013/3465 cut-off events. For 165710/165716 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22014 event pairs, 423 based on Foata normal form. 6/3463 useless extension candidates. Maximal degree in co-relation 21058. Up to 2994 conditions per place. [2024-06-04 16:15:13,899 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 264 selfloop transitions, 59 changer transitions 0/330 dead transitions. [2024-06-04 16:15:13,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 330 transitions, 4685 flow [2024-06-04 16:15:13,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:15:13,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:15:13,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-04 16:15:13,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 16:15:13,900 INFO L175 Difference]: Start difference. First operand has 236 places, 314 transitions, 3885 flow. Second operand 5 states and 126 transitions. [2024-06-04 16:15:13,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 330 transitions, 4685 flow [2024-06-04 16:15:14,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 330 transitions, 4542 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:14,287 INFO L231 Difference]: Finished difference. Result has 237 places, 314 transitions, 3874 flow [2024-06-04 16:15:14,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3742, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3874, PETRI_PLACES=237, PETRI_TRANSITIONS=314} [2024-06-04 16:15:14,287 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-04 16:15:14,287 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 314 transitions, 3874 flow [2024-06-04 16:15:14,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:14,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:14,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:14,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 16:15:14,288 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 16:15:14,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:14,288 INFO L85 PathProgramCache]: Analyzing trace with hash -23299051, now seen corresponding path program 6 times [2024-06-04 16:15:14,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:14,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121852193] [2024-06-04 16:15:14,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:14,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:14,485 INFO 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 16:15:14,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:14,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121852193] [2024-06-04 16:15:14,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121852193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:14,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:14,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:14,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133134450] [2024-06-04 16:15:14,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:14,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:14,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:14,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:14,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:14,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:14,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 314 transitions, 3874 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:14,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:14,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:14,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:15,011 INFO L124 PetriNetUnfolderBase]: 2007/3463 cut-off events. [2024-06-04 16:15:15,011 INFO L125 PetriNetUnfolderBase]: For 167550/167556 co-relation queries the response was YES. [2024-06-04 16:15:15,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21070 conditions, 3463 events. 2007/3463 cut-off events. For 167550/167556 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22001 event pairs, 407 based on Foata normal form. 6/3464 useless extension candidates. Maximal degree in co-relation 20956. Up to 2988 conditions per place. [2024-06-04 16:15:15,050 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 266 selfloop transitions, 67 changer transitions 0/340 dead transitions. [2024-06-04 16:15:15,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 340 transitions, 4606 flow [2024-06-04 16:15:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:15,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 16:15:15,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-04 16:15:15,051 INFO L175 Difference]: Start difference. First operand has 237 places, 314 transitions, 3874 flow. Second operand 7 states and 173 transitions. [2024-06-04 16:15:15,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 340 transitions, 4606 flow [2024-06-04 16:15:15,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 340 transitions, 4427 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:15,437 INFO L231 Difference]: Finished difference. Result has 238 places, 314 transitions, 3846 flow [2024-06-04 16:15:15,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3695, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3846, PETRI_PLACES=238, PETRI_TRANSITIONS=314} [2024-06-04 16:15:15,438 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-04 16:15:15,438 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 314 transitions, 3846 flow [2024-06-04 16:15:15,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:15,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:15,438 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 16:15:15,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 16:15:15,438 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 16:15:15,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:15,439 INFO L85 PathProgramCache]: Analyzing trace with hash 246791045, now seen corresponding path program 3 times [2024-06-04 16:15:15,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:15,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231689991] [2024-06-04 16:15:15,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:15,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:15,644 INFO 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 16:15:15,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:15,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231689991] [2024-06-04 16:15:15,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231689991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:15,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:15,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:15,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124861990] [2024-06-04 16:15:15,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:15,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:15,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:15,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:15,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:15,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:15,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 314 transitions, 3846 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 16:15:15,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:15,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:15,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:16,163 INFO L124 PetriNetUnfolderBase]: 2004/3459 cut-off events. [2024-06-04 16:15:16,163 INFO L125 PetriNetUnfolderBase]: For 164127/164133 co-relation queries the response was YES. [2024-06-04 16:15:16,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20977 conditions, 3459 events. 2004/3459 cut-off events. For 164127/164133 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 22013 event pairs, 414 based on Foata normal form. 5/3459 useless extension candidates. Maximal degree in co-relation 20863. Up to 2994 conditions per place. [2024-06-04 16:15:16,200 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 259 selfloop transitions, 65 changer transitions 0/331 dead transitions. [2024-06-04 16:15:16,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 331 transitions, 4652 flow [2024-06-04 16:15:16,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:16,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 16:15:16,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-04 16:15:16,201 INFO L175 Difference]: Start difference. First operand has 238 places, 314 transitions, 3846 flow. Second operand 6 states and 146 transitions. [2024-06-04 16:15:16,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 331 transitions, 4652 flow [2024-06-04 16:15:16,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 331 transitions, 4492 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:16,516 INFO L231 Difference]: Finished difference. Result has 237 places, 314 transitions, 3830 flow [2024-06-04 16:15:16,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3690, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3830, PETRI_PLACES=237, PETRI_TRANSITIONS=314} [2024-06-04 16:15:16,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-04 16:15:16,517 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 314 transitions, 3830 flow [2024-06-04 16:15:16,517 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 16:15:16,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:16,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:16,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 16:15:16,518 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 16:15:16,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:16,518 INFO L85 PathProgramCache]: Analyzing trace with hash 612909549, now seen corresponding path program 4 times [2024-06-04 16:15:16,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:16,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412915185] [2024-06-04 16:15:16,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:16,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:16,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:16,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412915185] [2024-06-04 16:15:16,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412915185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:16,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:16,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:16,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273709701] [2024-06-04 16:15:16,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:16,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:16,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:16,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:16,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:16,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:16,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 314 transitions, 3830 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 16:15:16,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:16,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:16,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:17,233 INFO L124 PetriNetUnfolderBase]: 2001/3444 cut-off events. [2024-06-04 16:15:17,233 INFO L125 PetriNetUnfolderBase]: For 156757/156757 co-relation queries the response was YES. [2024-06-04 16:15:17,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20753 conditions, 3444 events. 2001/3444 cut-off events. For 156757/156757 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 21818 event pairs, 417 based on Foata normal form. 1/3438 useless extension candidates. Maximal degree in co-relation 20639. Up to 2991 conditions per place. [2024-06-04 16:15:17,269 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 255 selfloop transitions, 65 changer transitions 0/327 dead transitions. [2024-06-04 16:15:17,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 327 transitions, 4502 flow [2024-06-04 16:15:17,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:17,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:17,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-04 16:15:17,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-04 16:15:17,270 INFO L175 Difference]: Start difference. First operand has 237 places, 314 transitions, 3830 flow. Second operand 6 states and 142 transitions. [2024-06-04 16:15:17,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 327 transitions, 4502 flow [2024-06-04 16:15:17,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 327 transitions, 4318 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:17,520 INFO L231 Difference]: Finished difference. Result has 237 places, 314 transitions, 3786 flow [2024-06-04 16:15:17,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3646, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3786, PETRI_PLACES=237, PETRI_TRANSITIONS=314} [2024-06-04 16:15:17,520 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-04 16:15:17,520 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 314 transitions, 3786 flow [2024-06-04 16:15:17,521 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 16:15:17,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:17,521 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 16:15:17,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 16:15:17,521 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 16:15:17,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:17,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1012718179, now seen corresponding path program 2 times [2024-06-04 16:15:17,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:17,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354619503] [2024-06-04 16:15:17,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:17,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:17,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:17,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354619503] [2024-06-04 16:15:17,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354619503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:17,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:17,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:17,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989535469] [2024-06-04 16:15:17,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:17,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:17,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:17,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:17,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:17,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:17,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 314 transitions, 3786 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 16:15:17,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:17,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:17,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:18,245 INFO L124 PetriNetUnfolderBase]: 2017/3479 cut-off events. [2024-06-04 16:15:18,245 INFO L125 PetriNetUnfolderBase]: For 162773/162779 co-relation queries the response was YES. [2024-06-04 16:15:18,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20873 conditions, 3479 events. 2017/3479 cut-off events. For 162773/162779 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 22125 event pairs, 416 based on Foata normal form. 8/3482 useless extension candidates. Maximal degree in co-relation 20760. Up to 2991 conditions per place. [2024-06-04 16:15:18,283 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 256 selfloop transitions, 71 changer transitions 0/334 dead transitions. [2024-06-04 16:15:18,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 334 transitions, 4540 flow [2024-06-04 16:15:18,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:18,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:18,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 16:15:18,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-04 16:15:18,285 INFO L175 Difference]: Start difference. First operand has 237 places, 314 transitions, 3786 flow. Second operand 6 states and 146 transitions. [2024-06-04 16:15:18,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 334 transitions, 4540 flow [2024-06-04 16:15:18,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 334 transitions, 4332 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:18,645 INFO L231 Difference]: Finished difference. Result has 236 places, 317 transitions, 3794 flow [2024-06-04 16:15:18,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3578, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3794, PETRI_PLACES=236, PETRI_TRANSITIONS=317} [2024-06-04 16:15:18,646 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-04 16:15:18,646 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 317 transitions, 3794 flow [2024-06-04 16:15:18,646 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 16:15:18,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:18,646 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 16:15:18,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 16:15:18,646 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 16:15:18,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:18,647 INFO L85 PathProgramCache]: Analyzing trace with hash 259312193, now seen corresponding path program 3 times [2024-06-04 16:15:18,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:18,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681429560] [2024-06-04 16:15:18,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:18,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:18,865 INFO 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 16:15:18,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:18,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681429560] [2024-06-04 16:15:18,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681429560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:18,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:18,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:18,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917391194] [2024-06-04 16:15:18,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:18,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:18,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:18,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:18,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:18,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:18,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 317 transitions, 3794 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 16:15:18,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:18,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:18,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:19,412 INFO L124 PetriNetUnfolderBase]: 2033/3505 cut-off events. [2024-06-04 16:15:19,413 INFO L125 PetriNetUnfolderBase]: For 161799/161799 co-relation queries the response was YES. [2024-06-04 16:15:19,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21186 conditions, 3505 events. 2033/3505 cut-off events. For 161799/161799 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 22249 event pairs, 397 based on Foata normal form. 4/3506 useless extension candidates. Maximal degree in co-relation 21073. Up to 3067 conditions per place. [2024-06-04 16:15:19,450 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 287 selfloop transitions, 46 changer transitions 0/340 dead transitions. [2024-06-04 16:15:19,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 340 transitions, 4574 flow [2024-06-04 16:15:19,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:19,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:19,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 16:15:19,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-04 16:15:19,451 INFO L175 Difference]: Start difference. First operand has 236 places, 317 transitions, 3794 flow. Second operand 6 states and 149 transitions. [2024-06-04 16:15:19,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 340 transitions, 4574 flow [2024-06-04 16:15:19,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 340 transitions, 4380 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:19,794 INFO L231 Difference]: Finished difference. Result has 238 places, 320 transitions, 3768 flow [2024-06-04 16:15:19,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3606, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3768, PETRI_PLACES=238, PETRI_TRANSITIONS=320} [2024-06-04 16:15:19,794 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-04 16:15:19,794 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 320 transitions, 3768 flow [2024-06-04 16:15:19,795 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 16:15:19,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:19,795 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 16:15:19,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 16:15:19,795 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 16:15:19,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:19,795 INFO L85 PathProgramCache]: Analyzing trace with hash -999758629, now seen corresponding path program 4 times [2024-06-04 16:15:19,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:19,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918672394] [2024-06-04 16:15:19,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:19,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:20,033 INFO 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 16:15:20,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:20,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918672394] [2024-06-04 16:15:20,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918672394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:20,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:20,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:20,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635035311] [2024-06-04 16:15:20,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:20,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:20,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:20,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:20,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:20,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:20,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 320 transitions, 3768 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 16:15:20,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:20,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:20,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:20,607 INFO L124 PetriNetUnfolderBase]: 2065/3559 cut-off events. [2024-06-04 16:15:20,607 INFO L125 PetriNetUnfolderBase]: For 165096/165096 co-relation queries the response was YES. [2024-06-04 16:15:20,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21504 conditions, 3559 events. 2065/3559 cut-off events. For 165096/165096 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 22663 event pairs, 396 based on Foata normal form. 4/3560 useless extension candidates. Maximal degree in co-relation 21390. Up to 3060 conditions per place. [2024-06-04 16:15:20,647 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 294 selfloop transitions, 44 changer transitions 0/345 dead transitions. [2024-06-04 16:15:20,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 345 transitions, 4726 flow [2024-06-04 16:15:20,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:20,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:20,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 16:15:20,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:15:20,650 INFO L175 Difference]: Start difference. First operand has 238 places, 320 transitions, 3768 flow. Second operand 6 states and 147 transitions. [2024-06-04 16:15:20,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 345 transitions, 4726 flow [2024-06-04 16:15:21,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 345 transitions, 4586 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:21,012 INFO L231 Difference]: Finished difference. Result has 241 places, 326 transitions, 3863 flow [2024-06-04 16:15:21,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3628, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3863, PETRI_PLACES=241, PETRI_TRANSITIONS=326} [2024-06-04 16:15:21,013 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-04 16:15:21,013 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 326 transitions, 3863 flow [2024-06-04 16:15:21,013 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 16:15:21,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:21,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:21,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 16:15:21,013 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 16:15:21,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:21,014 INFO L85 PathProgramCache]: Analyzing trace with hash -35706805, now seen corresponding path program 1 times [2024-06-04 16:15:21,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:21,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748158548] [2024-06-04 16:15:21,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:21,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:21,252 INFO 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 16:15:21,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:21,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748158548] [2024-06-04 16:15:21,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748158548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:21,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:21,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:21,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45143348] [2024-06-04 16:15:21,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:21,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:21,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:21,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:21,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:21,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:21,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 326 transitions, 3863 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 16:15:21,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:21,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:21,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:21,818 INFO L124 PetriNetUnfolderBase]: 2094/3602 cut-off events. [2024-06-04 16:15:21,818 INFO L125 PetriNetUnfolderBase]: For 176792/176792 co-relation queries the response was YES. [2024-06-04 16:15:21,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22101 conditions, 3602 events. 2094/3602 cut-off events. For 176792/176792 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 22985 event pairs, 374 based on Foata normal form. 4/3598 useless extension candidates. Maximal degree in co-relation 21985. Up to 3024 conditions per place. [2024-06-04 16:15:21,857 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 265 selfloop transitions, 83 changer transitions 0/355 dead transitions. [2024-06-04 16:15:21,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 355 transitions, 4843 flow [2024-06-04 16:15:21,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:21,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 16:15:21,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-04 16:15:21,858 INFO L175 Difference]: Start difference. First operand has 241 places, 326 transitions, 3863 flow. Second operand 7 states and 170 transitions. [2024-06-04 16:15:21,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 355 transitions, 4843 flow [2024-06-04 16:15:22,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 355 transitions, 4720 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:22,317 INFO L231 Difference]: Finished difference. Result has 246 places, 332 transitions, 4030 flow [2024-06-04 16:15:22,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3740, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4030, PETRI_PLACES=246, PETRI_TRANSITIONS=332} [2024-06-04 16:15:22,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-04 16:15:22,318 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 332 transitions, 4030 flow [2024-06-04 16:15:22,318 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 16:15:22,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:22,318 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 16:15:22,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 16:15:22,319 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 16:15:22,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:22,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1377403793, now seen corresponding path program 2 times [2024-06-04 16:15:22,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:22,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869009170] [2024-06-04 16:15:22,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:22,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:22,534 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 16:15:22,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:22,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869009170] [2024-06-04 16:15:22,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869009170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:22,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:22,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:22,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857148439] [2024-06-04 16:15:22,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:22,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:22,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:22,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:22,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:22,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:22,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 332 transitions, 4030 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 16:15:22,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:22,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:22,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:23,098 INFO L124 PetriNetUnfolderBase]: 2110/3621 cut-off events. [2024-06-04 16:15:23,098 INFO L125 PetriNetUnfolderBase]: For 181977/181977 co-relation queries the response was YES. [2024-06-04 16:15:23,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22466 conditions, 3621 events. 2110/3621 cut-off events. For 181977/181977 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 23084 event pairs, 431 based on Foata normal form. 4/3617 useless extension candidates. Maximal degree in co-relation 22348. Up to 3116 conditions per place. [2024-06-04 16:15:23,144 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 268 selfloop transitions, 78 changer transitions 0/353 dead transitions. [2024-06-04 16:15:23,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 353 transitions, 4828 flow [2024-06-04 16:15:23,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:23,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:23,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-04 16:15:23,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-04 16:15:23,145 INFO L175 Difference]: Start difference. First operand has 246 places, 332 transitions, 4030 flow. Second operand 7 states and 165 transitions. [2024-06-04 16:15:23,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 353 transitions, 4828 flow [2024-06-04 16:15:23,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 353 transitions, 4636 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:23,478 INFO L231 Difference]: Finished difference. Result has 250 places, 335 transitions, 4068 flow [2024-06-04 16:15:23,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3864, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4068, PETRI_PLACES=250, PETRI_TRANSITIONS=335} [2024-06-04 16:15:23,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-04 16:15:23,478 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 335 transitions, 4068 flow [2024-06-04 16:15:23,479 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 16:15:23,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:23,479 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 16:15:23,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 16:15:23,479 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 16:15:23,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:23,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1492694963, now seen corresponding path program 3 times [2024-06-04 16:15:23,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:23,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823614204] [2024-06-04 16:15:23,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:23,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:23,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:23,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823614204] [2024-06-04 16:15:23,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823614204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:23,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:23,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:23,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462900124] [2024-06-04 16:15:23,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:23,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:23,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:23,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:23,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:23,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:23,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 335 transitions, 4068 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 16:15:23,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:23,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:23,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:24,260 INFO L124 PetriNetUnfolderBase]: 2126/3650 cut-off events. [2024-06-04 16:15:24,260 INFO L125 PetriNetUnfolderBase]: For 186689/186689 co-relation queries the response was YES. [2024-06-04 16:15:24,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22639 conditions, 3650 events. 2126/3650 cut-off events. For 186689/186689 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 23252 event pairs, 415 based on Foata normal form. 4/3647 useless extension candidates. Maximal degree in co-relation 22519. Up to 3215 conditions per place. [2024-06-04 16:15:24,299 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 307 selfloop transitions, 39 changer transitions 0/353 dead transitions. [2024-06-04 16:15:24,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 353 transitions, 4838 flow [2024-06-04 16:15:24,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:24,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:24,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-04 16:15:24,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-06-04 16:15:24,301 INFO L175 Difference]: Start difference. First operand has 250 places, 335 transitions, 4068 flow. Second operand 7 states and 160 transitions. [2024-06-04 16:15:24,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 353 transitions, 4838 flow [2024-06-04 16:15:24,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 353 transitions, 4662 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:24,580 INFO L231 Difference]: Finished difference. Result has 252 places, 338 transitions, 4024 flow [2024-06-04 16:15:24,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3892, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4024, PETRI_PLACES=252, PETRI_TRANSITIONS=338} [2024-06-04 16:15:24,580 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-04 16:15:24,580 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 338 transitions, 4024 flow [2024-06-04 16:15:24,581 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 16:15:24,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:24,581 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 16:15:24,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 16:15:24,581 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 16:15:24,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:24,581 INFO L85 PathProgramCache]: Analyzing trace with hash 82626023, now seen corresponding path program 1 times [2024-06-04 16:15:24,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:24,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654445390] [2024-06-04 16:15:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:24,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:24,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:24,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654445390] [2024-06-04 16:15:24,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654445390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:24,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:24,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:24,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793927995] [2024-06-04 16:15:24,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:24,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:24,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:24,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:24,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:24,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:24,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 338 transitions, 4024 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 16:15:24,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:24,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:24,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:25,380 INFO L124 PetriNetUnfolderBase]: 2142/3673 cut-off events. [2024-06-04 16:15:25,381 INFO L125 PetriNetUnfolderBase]: For 192728/192728 co-relation queries the response was YES. [2024-06-04 16:15:25,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22821 conditions, 3673 events. 2142/3673 cut-off events. For 192728/192728 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 23431 event pairs, 424 based on Foata normal form. 4/3670 useless extension candidates. Maximal degree in co-relation 22700. Up to 3190 conditions per place. [2024-06-04 16:15:25,422 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 282 selfloop transitions, 67 changer transitions 0/356 dead transitions. [2024-06-04 16:15:25,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 356 transitions, 4826 flow [2024-06-04 16:15:25,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:25,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-04 16:15:25,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-06-04 16:15:25,423 INFO L175 Difference]: Start difference. First operand has 252 places, 338 transitions, 4024 flow. Second operand 7 states and 162 transitions. [2024-06-04 16:15:25,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 356 transitions, 4826 flow [2024-06-04 16:15:25,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 356 transitions, 4722 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:25,731 INFO L231 Difference]: Finished difference. Result has 254 places, 341 transitions, 4134 flow [2024-06-04 16:15:25,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3920, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4134, PETRI_PLACES=254, PETRI_TRANSITIONS=341} [2024-06-04 16:15:25,732 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-04 16:15:25,732 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 341 transitions, 4134 flow [2024-06-04 16:15:25,733 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 16:15:25,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:25,733 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 16:15:25,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 16:15:25,733 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 16:15:25,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:25,733 INFO L85 PathProgramCache]: Analyzing trace with hash 453483979, now seen corresponding path program 4 times [2024-06-04 16:15:25,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:25,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485563667] [2024-06-04 16:15:25,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:25,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:25,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:25,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485563667] [2024-06-04 16:15:25,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485563667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:25,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:25,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:25,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116351849] [2024-06-04 16:15:25,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:25,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:25,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:25,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:25,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:26,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:26,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 341 transitions, 4134 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 16:15:26,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:26,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:26,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:26,562 INFO L124 PetriNetUnfolderBase]: 2132/3665 cut-off events. [2024-06-04 16:15:26,562 INFO L125 PetriNetUnfolderBase]: For 191286/191286 co-relation queries the response was YES. [2024-06-04 16:15:26,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22709 conditions, 3665 events. 2132/3665 cut-off events. For 191286/191286 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23397 event pairs, 358 based on Foata normal form. 4/3662 useless extension candidates. Maximal degree in co-relation 22587. Up to 3115 conditions per place. [2024-06-04 16:15:26,602 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 282 selfloop transitions, 76 changer transitions 0/365 dead transitions. [2024-06-04 16:15:26,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 365 transitions, 4910 flow [2024-06-04 16:15:26,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:26,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:26,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 16:15:26,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-04 16:15:26,603 INFO L175 Difference]: Start difference. First operand has 254 places, 341 transitions, 4134 flow. Second operand 7 states and 171 transitions. [2024-06-04 16:15:26,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 365 transitions, 4910 flow [2024-06-04 16:15:26,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 365 transitions, 4698 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:26,898 INFO L231 Difference]: Finished difference. Result has 256 places, 341 transitions, 4089 flow [2024-06-04 16:15:26,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3922, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4089, PETRI_PLACES=256, PETRI_TRANSITIONS=341} [2024-06-04 16:15:26,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-04 16:15:26,899 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 341 transitions, 4089 flow [2024-06-04 16:15:26,899 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 16:15:26,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:26,899 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 16:15:26,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 16:15:26,900 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 16:15:26,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:26,900 INFO L85 PathProgramCache]: Analyzing trace with hash 619181531, now seen corresponding path program 2 times [2024-06-04 16:15:26,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:26,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328904857] [2024-06-04 16:15:26,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:26,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:27,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:27,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328904857] [2024-06-04 16:15:27,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328904857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:27,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:27,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:27,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504097039] [2024-06-04 16:15:27,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:27,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:27,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:27,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:27,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:27,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:27,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 341 transitions, 4089 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 16:15:27,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:27,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:27,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:27,703 INFO L124 PetriNetUnfolderBase]: 2148/3691 cut-off events. [2024-06-04 16:15:27,704 INFO L125 PetriNetUnfolderBase]: For 195623/195623 co-relation queries the response was YES. [2024-06-04 16:15:27,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22867 conditions, 3691 events. 2148/3691 cut-off events. For 195623/195623 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23587 event pairs, 400 based on Foata normal form. 4/3692 useless extension candidates. Maximal degree in co-relation 22744. Up to 3240 conditions per place. [2024-06-04 16:15:27,745 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 311 selfloop transitions, 46 changer transitions 0/364 dead transitions. [2024-06-04 16:15:27,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 364 transitions, 4897 flow [2024-06-04 16:15:27,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:27,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:27,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 16:15:27,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-04 16:15:27,746 INFO L175 Difference]: Start difference. First operand has 256 places, 341 transitions, 4089 flow. Second operand 6 states and 149 transitions. [2024-06-04 16:15:27,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 364 transitions, 4897 flow [2024-06-04 16:15:28,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 364 transitions, 4733 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:28,044 INFO L231 Difference]: Finished difference. Result has 256 places, 344 transitions, 4073 flow [2024-06-04 16:15:28,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3925, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4073, PETRI_PLACES=256, PETRI_TRANSITIONS=344} [2024-06-04 16:15:28,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-04 16:15:28,045 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 344 transitions, 4073 flow [2024-06-04 16:15:28,045 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 16:15:28,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:28,045 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 16:15:28,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 16:15:28,046 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 16:15:28,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:28,046 INFO L85 PathProgramCache]: Analyzing trace with hash 690140707, now seen corresponding path program 3 times [2024-06-04 16:15:28,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:28,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200064720] [2024-06-04 16:15:28,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:28,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:28,269 INFO 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 16:15:28,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:28,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200064720] [2024-06-04 16:15:28,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200064720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:28,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:28,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:28,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97066253] [2024-06-04 16:15:28,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:28,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:28,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:28,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:28,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:28,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:28,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 344 transitions, 4073 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 16:15:28,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:28,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:28,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:28,848 INFO L124 PetriNetUnfolderBase]: 2135/3672 cut-off events. [2024-06-04 16:15:28,848 INFO L125 PetriNetUnfolderBase]: For 187334/187334 co-relation queries the response was YES. [2024-06-04 16:15:28,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22416 conditions, 3672 events. 2135/3672 cut-off events. For 187334/187334 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 23432 event pairs, 395 based on Foata normal form. 4/3673 useless extension candidates. Maximal degree in co-relation 22292. Up to 3163 conditions per place. [2024-06-04 16:15:28,888 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 308 selfloop transitions, 47 changer transitions 0/362 dead transitions. [2024-06-04 16:15:28,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 362 transitions, 4827 flow [2024-06-04 16:15:28,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:28,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:28,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 16:15:28,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-04 16:15:28,889 INFO L175 Difference]: Start difference. First operand has 256 places, 344 transitions, 4073 flow. Second operand 6 states and 146 transitions. [2024-06-04 16:15:28,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 362 transitions, 4827 flow [2024-06-04 16:15:29,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 362 transitions, 4689 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:29,219 INFO L231 Difference]: Finished difference. Result has 258 places, 344 transitions, 4037 flow [2024-06-04 16:15:29,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3935, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4037, PETRI_PLACES=258, PETRI_TRANSITIONS=344} [2024-06-04 16:15:29,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-04 16:15:29,220 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 344 transitions, 4037 flow [2024-06-04 16:15:29,220 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 16:15:29,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:29,220 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 16:15:29,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 16:15:29,220 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 16:15:29,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:29,221 INFO L85 PathProgramCache]: Analyzing trace with hash 453668677, now seen corresponding path program 4 times [2024-06-04 16:15:29,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:29,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349193592] [2024-06-04 16:15:29,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:29,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:29,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:29,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349193592] [2024-06-04 16:15:29,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349193592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:29,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:29,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:29,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26567162] [2024-06-04 16:15:29,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:29,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:29,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:29,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:29,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:29,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:29,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 344 transitions, 4037 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 16:15:29,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:29,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:29,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:29,997 INFO L124 PetriNetUnfolderBase]: 2138/3658 cut-off events. [2024-06-04 16:15:29,997 INFO L125 PetriNetUnfolderBase]: For 189742/189742 co-relation queries the response was YES. [2024-06-04 16:15:30,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22339 conditions, 3658 events. 2138/3658 cut-off events. For 189742/189742 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23315 event pairs, 422 based on Foata normal form. 4/3655 useless extension candidates. Maximal degree in co-relation 22214. Up to 3174 conditions per place. [2024-06-04 16:15:30,038 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 283 selfloop transitions, 71 changer transitions 0/361 dead transitions. [2024-06-04 16:15:30,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 361 transitions, 4853 flow [2024-06-04 16:15:30,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:30,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-04 16:15:30,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-06-04 16:15:30,039 INFO L175 Difference]: Start difference. First operand has 258 places, 344 transitions, 4037 flow. Second operand 6 states and 143 transitions. [2024-06-04 16:15:30,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 361 transitions, 4853 flow [2024-06-04 16:15:30,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 361 transitions, 4740 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:30,399 INFO L231 Difference]: Finished difference. Result has 259 places, 347 transitions, 4156 flow [2024-06-04 16:15:30,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3924, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4156, PETRI_PLACES=259, PETRI_TRANSITIONS=347} [2024-06-04 16:15:30,400 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-04 16:15:30,400 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 347 transitions, 4156 flow [2024-06-04 16:15:30,400 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 16:15:30,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:30,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:30,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 16:15:30,401 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 16:15:30,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:30,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1110363624, now seen corresponding path program 1 times [2024-06-04 16:15:30,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:30,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321271093] [2024-06-04 16:15:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:30,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:30,635 INFO 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 16:15:30,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:30,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321271093] [2024-06-04 16:15:30,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321271093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:30,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:30,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:30,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554415676] [2024-06-04 16:15:30,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:30,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:30,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:30,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:30,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:30,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:30,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 347 transitions, 4156 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 16:15:30,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:30,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:30,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:31,274 INFO L124 PetriNetUnfolderBase]: 2151/3692 cut-off events. [2024-06-04 16:15:31,274 INFO L125 PetriNetUnfolderBase]: For 192465/192471 co-relation queries the response was YES. [2024-06-04 16:15:31,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22759 conditions, 3692 events. 2151/3692 cut-off events. For 192465/192471 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 23554 event pairs, 418 based on Foata normal form. 5/3692 useless extension candidates. Maximal degree in co-relation 22633. Up to 3204 conditions per place. [2024-06-04 16:15:31,316 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 294 selfloop transitions, 73 changer transitions 0/374 dead transitions. [2024-06-04 16:15:31,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 374 transitions, 5158 flow [2024-06-04 16:15:31,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:31,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:31,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-04 16:15:31,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2024-06-04 16:15:31,317 INFO L175 Difference]: Start difference. First operand has 259 places, 347 transitions, 4156 flow. Second operand 10 states and 219 transitions. [2024-06-04 16:15:31,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 374 transitions, 5158 flow [2024-06-04 16:15:31,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 374 transitions, 4952 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:31,863 INFO L231 Difference]: Finished difference. Result has 266 places, 353 transitions, 4209 flow [2024-06-04 16:15:31,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3952, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4209, PETRI_PLACES=266, PETRI_TRANSITIONS=353} [2024-06-04 16:15:31,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-04 16:15:31,863 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 353 transitions, 4209 flow [2024-06-04 16:15:31,864 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 16:15:31,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:31,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:31,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 16:15:31,864 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 16:15:31,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:31,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1590534910, now seen corresponding path program 2 times [2024-06-04 16:15:31,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:31,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906622050] [2024-06-04 16:15:31,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:31,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:32,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:32,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906622050] [2024-06-04 16:15:32,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906622050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:32,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:32,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:32,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985084458] [2024-06-04 16:15:32,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:32,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:32,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:32,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:32,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:32,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:32,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 353 transitions, 4209 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 16:15:32,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:32,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:32,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:32,733 INFO L124 PetriNetUnfolderBase]: 2172/3725 cut-off events. [2024-06-04 16:15:32,733 INFO L125 PetriNetUnfolderBase]: For 195500/195506 co-relation queries the response was YES. [2024-06-04 16:15:32,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22891 conditions, 3725 events. 2172/3725 cut-off events. For 195500/195506 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 23806 event pairs, 448 based on Foata normal form. 1/3719 useless extension candidates. Maximal degree in co-relation 22763. Up to 3068 conditions per place. [2024-06-04 16:15:32,770 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 238 selfloop transitions, 140 changer transitions 0/385 dead transitions. [2024-06-04 16:15:32,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 385 transitions, 5549 flow [2024-06-04 16:15:32,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:32,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:32,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-04 16:15:32,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-04 16:15:32,771 INFO L175 Difference]: Start difference. First operand has 266 places, 353 transitions, 4209 flow. Second operand 7 states and 172 transitions. [2024-06-04 16:15:32,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 385 transitions, 5549 flow [2024-06-04 16:15:33,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 385 transitions, 5364 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:33,224 INFO L231 Difference]: Finished difference. Result has 266 places, 362 transitions, 4448 flow [2024-06-04 16:15:33,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4024, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4448, PETRI_PLACES=266, PETRI_TRANSITIONS=362} [2024-06-04 16:15:33,224 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-04 16:15:33,225 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 362 transitions, 4448 flow [2024-06-04 16:15:33,225 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 16:15:33,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:33,225 INFO 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 16:15:33,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 16:15:33,225 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 16:15:33,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:33,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1586810260, now seen corresponding path program 3 times [2024-06-04 16:15:33,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:33,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122824655] [2024-06-04 16:15:33,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:33,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:33,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:33,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122824655] [2024-06-04 16:15:33,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122824655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:33,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:33,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:33,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308464684] [2024-06-04 16:15:33,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:33,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:33,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:33,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:33,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:33,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:33,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 362 transitions, 4448 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 16:15:33,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:33,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:33,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:34,062 INFO L124 PetriNetUnfolderBase]: 2177/3736 cut-off events. [2024-06-04 16:15:34,062 INFO L125 PetriNetUnfolderBase]: For 201427/201433 co-relation queries the response was YES. [2024-06-04 16:15:34,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23168 conditions, 3736 events. 2177/3736 cut-off events. For 201427/201433 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 23909 event pairs, 419 based on Foata normal form. 5/3736 useless extension candidates. Maximal degree in co-relation 23039. Up to 3242 conditions per place. [2024-06-04 16:15:34,108 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 305 selfloop transitions, 73 changer transitions 0/385 dead transitions. [2024-06-04 16:15:34,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 385 transitions, 5424 flow [2024-06-04 16:15:34,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:34,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:34,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-04 16:15:34,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-04 16:15:34,109 INFO L175 Difference]: Start difference. First operand has 266 places, 362 transitions, 4448 flow. Second operand 9 states and 201 transitions. [2024-06-04 16:15:34,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 385 transitions, 5424 flow [2024-06-04 16:15:34,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 385 transitions, 5114 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:34,673 INFO L231 Difference]: Finished difference. Result has 271 places, 365 transitions, 4330 flow [2024-06-04 16:15:34,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4144, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4330, PETRI_PLACES=271, PETRI_TRANSITIONS=365} [2024-06-04 16:15:34,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-04 16:15:34,673 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 365 transitions, 4330 flow [2024-06-04 16:15:34,674 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 16:15:34,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:34,674 INFO 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 16:15:34,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 16:15:34,674 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 16:15:34,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:34,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1368889870, now seen corresponding path program 4 times [2024-06-04 16:15:34,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:34,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100284109] [2024-06-04 16:15:34,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:34,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:34,873 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 16:15:34,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:34,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100284109] [2024-06-04 16:15:34,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100284109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:34,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:34,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:34,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523616962] [2024-06-04 16:15:34,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:34,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:34,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:34,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:34,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:34,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:34,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 365 transitions, 4330 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 16:15:34,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:34,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:34,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:35,490 INFO L124 PetriNetUnfolderBase]: 2182/3739 cut-off events. [2024-06-04 16:15:35,490 INFO L125 PetriNetUnfolderBase]: For 206525/206531 co-relation queries the response was YES. [2024-06-04 16:15:35,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23106 conditions, 3739 events. 2182/3739 cut-off events. For 206525/206531 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 23919 event pairs, 443 based on Foata normal form. 5/3736 useless extension candidates. Maximal degree in co-relation 22977. Up to 3080 conditions per place. [2024-06-04 16:15:35,534 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 240 selfloop transitions, 140 changer transitions 0/387 dead transitions. [2024-06-04 16:15:35,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 387 transitions, 5448 flow [2024-06-04 16:15:35,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:35,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:35,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 16:15:35,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-04 16:15:35,535 INFO L175 Difference]: Start difference. First operand has 271 places, 365 transitions, 4330 flow. Second operand 7 states and 166 transitions. [2024-06-04 16:15:35,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 387 transitions, 5448 flow [2024-06-04 16:15:36,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 387 transitions, 5292 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:36,035 INFO L231 Difference]: Finished difference. Result has 271 places, 368 transitions, 4504 flow [2024-06-04 16:15:36,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4174, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4504, PETRI_PLACES=271, PETRI_TRANSITIONS=368} [2024-06-04 16:15:36,036 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-04 16:15:36,036 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 368 transitions, 4504 flow [2024-06-04 16:15:36,036 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 16:15:36,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:36,036 INFO 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 16:15:36,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 16:15:36,036 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 16:15:36,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:36,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1484346568, now seen corresponding path program 5 times [2024-06-04 16:15:36,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:36,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889111839] [2024-06-04 16:15:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:36,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:36,244 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 16:15:36,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:36,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889111839] [2024-06-04 16:15:36,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889111839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:36,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:36,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:36,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850777679] [2024-06-04 16:15:36,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:36,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:36,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:36,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:36,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:36,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:36,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 368 transitions, 4504 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 16:15:36,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:36,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:36,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:36,838 INFO L124 PetriNetUnfolderBase]: 2179/3741 cut-off events. [2024-06-04 16:15:36,839 INFO L125 PetriNetUnfolderBase]: For 209823/209829 co-relation queries the response was YES. [2024-06-04 16:15:36,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23290 conditions, 3741 events. 2179/3741 cut-off events. For 209823/209829 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 23954 event pairs, 419 based on Foata normal form. 5/3741 useless extension candidates. Maximal degree in co-relation 23160. Up to 3246 conditions per place. [2024-06-04 16:15:36,884 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 306 selfloop transitions, 72 changer transitions 0/385 dead transitions. [2024-06-04 16:15:36,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 385 transitions, 5302 flow [2024-06-04 16:15:36,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:36,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:36,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-04 16:15:36,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-04 16:15:36,885 INFO L175 Difference]: Start difference. First operand has 271 places, 368 transitions, 4504 flow. Second operand 7 states and 165 transitions. [2024-06-04 16:15:36,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 385 transitions, 5302 flow [2024-06-04 16:15:37,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 385 transitions, 4937 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:37,349 INFO L231 Difference]: Finished difference. Result has 273 places, 368 transitions, 4289 flow [2024-06-04 16:15:37,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4139, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4289, PETRI_PLACES=273, PETRI_TRANSITIONS=368} [2024-06-04 16:15:37,350 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-04 16:15:37,350 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 368 transitions, 4289 flow [2024-06-04 16:15:37,350 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 16:15:37,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:37,350 INFO 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 16:15:37,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 16:15:37,350 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 16:15:37,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:37,351 INFO L85 PathProgramCache]: Analyzing trace with hash -453490104, now seen corresponding path program 6 times [2024-06-04 16:15:37,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:37,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654662328] [2024-06-04 16:15:37,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:37,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:37,569 INFO 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 16:15:37,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:37,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654662328] [2024-06-04 16:15:37,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654662328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:37,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:37,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:37,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416657718] [2024-06-04 16:15:37,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:37,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:37,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:37,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:37,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:37,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:37,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 368 transitions, 4289 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 16:15:37,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:37,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:37,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:38,178 INFO L124 PetriNetUnfolderBase]: 2184/3732 cut-off events. [2024-06-04 16:15:38,179 INFO L125 PetriNetUnfolderBase]: For 213881/213881 co-relation queries the response was YES. [2024-06-04 16:15:38,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23136 conditions, 3732 events. 2184/3732 cut-off events. For 213881/213881 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 23818 event pairs, 447 based on Foata normal form. 1/3725 useless extension candidates. Maximal degree in co-relation 23005. Up to 3083 conditions per place. [2024-06-04 16:15:38,221 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 234 selfloop transitions, 150 changer transitions 0/391 dead transitions. [2024-06-04 16:15:38,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 391 transitions, 5419 flow [2024-06-04 16:15:38,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:38,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-04 16:15:38,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:15:38,222 INFO L175 Difference]: Start difference. First operand has 273 places, 368 transitions, 4289 flow. Second operand 8 states and 188 transitions. [2024-06-04 16:15:38,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 391 transitions, 5419 flow [2024-06-04 16:15:38,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 391 transitions, 5275 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:38,686 INFO L231 Difference]: Finished difference. Result has 275 places, 371 transitions, 4489 flow [2024-06-04 16:15:38,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4145, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4489, PETRI_PLACES=275, PETRI_TRANSITIONS=371} [2024-06-04 16:15:38,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-04 16:15:38,687 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 371 transitions, 4489 flow [2024-06-04 16:15:38,687 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 16:15:38,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:38,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:38,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 16:15:38,688 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 16:15:38,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:38,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1455494786, now seen corresponding path program 7 times [2024-06-04 16:15:38,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:38,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49678653] [2024-06-04 16:15:38,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:38,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:38,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:38,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49678653] [2024-06-04 16:15:38,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49678653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:38,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:38,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:38,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847733072] [2024-06-04 16:15:38,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:38,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:38,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:38,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:38,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:38,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:38,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 371 transitions, 4489 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 16:15:38,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:38,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:38,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:39,466 INFO L124 PetriNetUnfolderBase]: 2181/3740 cut-off events. [2024-06-04 16:15:39,466 INFO L125 PetriNetUnfolderBase]: For 218588/218594 co-relation queries the response was YES. [2024-06-04 16:15:39,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23363 conditions, 3740 events. 2181/3740 cut-off events. For 218588/218594 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 23987 event pairs, 443 based on Foata normal form. 5/3737 useless extension candidates. Maximal degree in co-relation 23231. Up to 3080 conditions per place. [2024-06-04 16:15:39,510 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 242 selfloop transitions, 137 changer transitions 0/386 dead transitions. [2024-06-04 16:15:39,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 386 transitions, 5423 flow [2024-06-04 16:15:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:39,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:39,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 16:15:39,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-04 16:15:39,512 INFO L175 Difference]: Start difference. First operand has 275 places, 371 transitions, 4489 flow. Second operand 7 states and 163 transitions. [2024-06-04 16:15:39,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 386 transitions, 5423 flow [2024-06-04 16:15:40,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 386 transitions, 5188 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:40,199 INFO L231 Difference]: Finished difference. Result has 277 places, 371 transitions, 4534 flow [2024-06-04 16:15:40,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4254, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4534, PETRI_PLACES=277, PETRI_TRANSITIONS=371} [2024-06-04 16:15:40,200 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-04 16:15:40,200 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 371 transitions, 4534 flow [2024-06-04 16:15:40,200 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 16:15:40,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:40,201 INFO 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 16:15:40,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 16:15:40,201 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 16:15:40,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:40,201 INFO L85 PathProgramCache]: Analyzing trace with hash 2074942792, now seen corresponding path program 8 times [2024-06-04 16:15:40,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:40,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766073362] [2024-06-04 16:15:40,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:40,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:40,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:40,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766073362] [2024-06-04 16:15:40,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766073362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:40,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:40,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:40,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767769347] [2024-06-04 16:15:40,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:40,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:40,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:40,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:40,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:40,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:40,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 371 transitions, 4534 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 16:15:40,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:40,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:40,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:41,088 INFO L124 PetriNetUnfolderBase]: 2186/3743 cut-off events. [2024-06-04 16:15:41,088 INFO L125 PetriNetUnfolderBase]: For 224411/224411 co-relation queries the response was YES. [2024-06-04 16:15:41,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23482 conditions, 3743 events. 2186/3743 cut-off events. For 224411/224411 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 23961 event pairs, 422 based on Foata normal form. 1/3737 useless extension candidates. Maximal degree in co-relation 23348. Up to 3244 conditions per place. [2024-06-04 16:15:41,133 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 304 selfloop transitions, 78 changer transitions 0/389 dead transitions. [2024-06-04 16:15:41,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 389 transitions, 5387 flow [2024-06-04 16:15:41,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:41,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-04 16:15:41,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-04 16:15:41,134 INFO L175 Difference]: Start difference. First operand has 277 places, 371 transitions, 4534 flow. Second operand 8 states and 182 transitions. [2024-06-04 16:15:41,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 389 transitions, 5387 flow [2024-06-04 16:15:41,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 389 transitions, 4942 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:41,690 INFO L231 Difference]: Finished difference. Result has 278 places, 374 transitions, 4310 flow [2024-06-04 16:15:41,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4101, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4310, PETRI_PLACES=278, PETRI_TRANSITIONS=374} [2024-06-04 16:15:41,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-04 16:15:41,691 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 374 transitions, 4310 flow [2024-06-04 16:15:41,691 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 16:15:41,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:41,692 INFO 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 16:15:41,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 16:15:41,692 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 16:15:41,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:41,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1707344904, now seen corresponding path program 9 times [2024-06-04 16:15:41,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:41,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845737567] [2024-06-04 16:15:41,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:41,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:41,893 INFO 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 16:15:41,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:41,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845737567] [2024-06-04 16:15:41,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845737567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:41,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:41,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:41,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561324222] [2024-06-04 16:15:41,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:41,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:41,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:41,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:41,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:41,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:41,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 374 transitions, 4310 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 16:15:41,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:41,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:41,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:42,593 INFO L124 PetriNetUnfolderBase]: 2207/3790 cut-off events. [2024-06-04 16:15:42,593 INFO L125 PetriNetUnfolderBase]: For 234350/234356 co-relation queries the response was YES. [2024-06-04 16:15:42,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23619 conditions, 3790 events. 2207/3790 cut-off events. For 234350/234356 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 24345 event pairs, 419 based on Foata normal form. 5/3790 useless extension candidates. Maximal degree in co-relation 23486. Up to 3143 conditions per place. [2024-06-04 16:15:42,632 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 154 changer transitions 0/411 dead transitions. [2024-06-04 16:15:42,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 411 transitions, 5759 flow [2024-06-04 16:15:42,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:42,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:42,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-04 16:15:42,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-04 16:15:42,633 INFO L175 Difference]: Start difference. First operand has 278 places, 374 transitions, 4310 flow. Second operand 9 states and 213 transitions. [2024-06-04 16:15:42,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 411 transitions, 5759 flow [2024-06-04 16:15:43,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 411 transitions, 5581 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:43,166 INFO L231 Difference]: Finished difference. Result has 281 places, 383 transitions, 4591 flow [2024-06-04 16:15:43,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4132, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4591, PETRI_PLACES=281, PETRI_TRANSITIONS=383} [2024-06-04 16:15:43,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-04 16:15:43,167 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 383 transitions, 4591 flow [2024-06-04 16:15:43,167 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 16:15:43,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:43,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:43,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 16:15:43,168 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 16:15:43,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:43,168 INFO L85 PathProgramCache]: Analyzing trace with hash 2080038262, now seen corresponding path program 10 times [2024-06-04 16:15:43,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:43,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295400527] [2024-06-04 16:15:43,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:43,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:43,397 INFO 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 16:15:43,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:43,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295400527] [2024-06-04 16:15:43,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295400527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:43,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:43,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:43,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565288572] [2024-06-04 16:15:43,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:43,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:43,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:43,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:43,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:43,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:43,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 383 transitions, 4591 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 16:15:43,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:43,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:43,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:44,098 INFO L124 PetriNetUnfolderBase]: 2220/3801 cut-off events. [2024-06-04 16:15:44,099 INFO L125 PetriNetUnfolderBase]: For 243250/243250 co-relation queries the response was YES. [2024-06-04 16:15:44,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24120 conditions, 3801 events. 2220/3801 cut-off events. For 243250/243250 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24384 event pairs, 421 based on Foata normal form. 1/3795 useless extension candidates. Maximal degree in co-relation 23986. Up to 3284 conditions per place. [2024-06-04 16:15:44,142 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 316 selfloop transitions, 85 changer transitions 0/408 dead transitions. [2024-06-04 16:15:44,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 408 transitions, 5689 flow [2024-06-04 16:15:44,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:15:44,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:15:44,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-04 16:15:44,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108225108225108 [2024-06-04 16:15:44,143 INFO L175 Difference]: Start difference. First operand has 281 places, 383 transitions, 4591 flow. Second operand 11 states and 236 transitions. [2024-06-04 16:15:44,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 408 transitions, 5689 flow [2024-06-04 16:15:44,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 408 transitions, 5301 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:44,874 INFO L231 Difference]: Finished difference. Result has 286 places, 389 transitions, 4507 flow [2024-06-04 16:15:44,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4223, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4507, PETRI_PLACES=286, PETRI_TRANSITIONS=389} [2024-06-04 16:15:44,875 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-04 16:15:44,875 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 389 transitions, 4507 flow [2024-06-04 16:15:44,875 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 16:15:44,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:44,876 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] [2024-06-04 16:15:44,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 16:15:44,876 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 16:15:44,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:44,876 INFO L85 PathProgramCache]: Analyzing trace with hash -965594772, now seen corresponding path program 11 times [2024-06-04 16:15:44,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:44,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912974666] [2024-06-04 16:15:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:44,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:45,109 INFO 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 16:15:45,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:45,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912974666] [2024-06-04 16:15:45,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912974666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:45,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:45,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:45,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923426875] [2024-06-04 16:15:45,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:45,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:45,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:45,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:45,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:45,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:45,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 389 transitions, 4507 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 16:15:45,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:45,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:45,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:45,797 INFO L124 PetriNetUnfolderBase]: 2217/3797 cut-off events. [2024-06-04 16:15:45,798 INFO L125 PetriNetUnfolderBase]: For 239467/239467 co-relation queries the response was YES. [2024-06-04 16:15:45,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23755 conditions, 3797 events. 2217/3797 cut-off events. For 239467/239467 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24400 event pairs, 421 based on Foata normal form. 1/3791 useless extension candidates. Maximal degree in co-relation 23620. Up to 3281 conditions per place. [2024-06-04 16:15:45,845 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 317 selfloop transitions, 85 changer transitions 0/409 dead transitions. [2024-06-04 16:15:45,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 409 transitions, 5357 flow [2024-06-04 16:15:45,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:15:45,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:15:45,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 272 transitions. [2024-06-04 16:15:45,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981684981684982 [2024-06-04 16:15:45,846 INFO L175 Difference]: Start difference. First operand has 286 places, 389 transitions, 4507 flow. Second operand 13 states and 272 transitions. [2024-06-04 16:15:45,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 409 transitions, 5357 flow [2024-06-04 16:15:46,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 409 transitions, 5147 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:46,521 INFO L231 Difference]: Finished difference. Result has 291 places, 389 transitions, 4473 flow [2024-06-04 16:15:46,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4297, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4473, PETRI_PLACES=291, PETRI_TRANSITIONS=389} [2024-06-04 16:15:46,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-04 16:15:46,522 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 389 transitions, 4473 flow [2024-06-04 16:15:46,522 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 16:15:46,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:46,522 INFO 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 16:15:46,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 16:15:46,522 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 16:15:46,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:46,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1739592440, now seen corresponding path program 12 times [2024-06-04 16:15:46,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:46,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433456752] [2024-06-04 16:15:46,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:46,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:46,726 INFO 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 16:15:46,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:46,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433456752] [2024-06-04 16:15:46,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433456752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:46,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:46,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:46,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149391352] [2024-06-04 16:15:46,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:46,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:46,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:46,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:46,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:46,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:46,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 389 transitions, 4473 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 16:15:46,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:46,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:46,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:47,348 INFO L124 PetriNetUnfolderBase]: 2214/3798 cut-off events. [2024-06-04 16:15:47,348 INFO L125 PetriNetUnfolderBase]: For 243817/243823 co-relation queries the response was YES. [2024-06-04 16:15:47,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23710 conditions, 3798 events. 2214/3798 cut-off events. For 243817/243823 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24476 event pairs, 443 based on Foata normal form. 5/3795 useless extension candidates. Maximal degree in co-relation 23574. Up to 3152 conditions per place. [2024-06-04 16:15:47,473 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 261 selfloop transitions, 139 changer transitions 0/407 dead transitions. [2024-06-04 16:15:47,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 407 transitions, 5613 flow [2024-06-04 16:15:47,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:47,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:47,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 16:15:47,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 16:15:47,474 INFO L175 Difference]: Start difference. First operand has 291 places, 389 transitions, 4473 flow. Second operand 6 states and 148 transitions. [2024-06-04 16:15:47,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 407 transitions, 5613 flow [2024-06-04 16:15:48,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 407 transitions, 5433 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-04 16:15:48,143 INFO L231 Difference]: Finished difference. Result has 285 places, 389 transitions, 4578 flow [2024-06-04 16:15:48,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4293, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4578, PETRI_PLACES=285, PETRI_TRANSITIONS=389} [2024-06-04 16:15:48,143 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-04 16:15:48,143 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 389 transitions, 4578 flow [2024-06-04 16:15:48,143 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 16:15:48,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:48,144 INFO 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 16:15:48,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 16:15:48,144 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 16:15:48,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:48,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1231341504, now seen corresponding path program 13 times [2024-06-04 16:15:48,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:48,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194855325] [2024-06-04 16:15:48,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:48,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:48,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:48,344 INFO 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 16:15:48,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:48,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194855325] [2024-06-04 16:15:48,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194855325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:48,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:48,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:48,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392232972] [2024-06-04 16:15:48,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:48,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:48,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:48,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:48,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:48,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:48,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 389 transitions, 4578 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 16:15:48,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:48,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:48,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:48,992 INFO L124 PetriNetUnfolderBase]: 2211/3800 cut-off events. [2024-06-04 16:15:48,992 INFO L125 PetriNetUnfolderBase]: For 247155/247161 co-relation queries the response was YES. [2024-06-04 16:15:49,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23852 conditions, 3800 events. 2211/3800 cut-off events. For 247155/247161 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24511 event pairs, 419 based on Foata normal form. 5/3800 useless extension candidates. Maximal degree in co-relation 23715. Up to 3149 conditions per place. [2024-06-04 16:15:49,038 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 257 selfloop transitions, 155 changer transitions 0/419 dead transitions. [2024-06-04 16:15:49,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 419 transitions, 5926 flow [2024-06-04 16:15:49,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:49,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:49,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 16:15:49,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-04 16:15:49,039 INFO L175 Difference]: Start difference. First operand has 285 places, 389 transitions, 4578 flow. Second operand 8 states and 199 transitions. [2024-06-04 16:15:49,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 419 transitions, 5926 flow [2024-06-04 16:15:49,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 419 transitions, 5616 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:49,693 INFO L231 Difference]: Finished difference. Result has 289 places, 389 transitions, 4589 flow [2024-06-04 16:15:49,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4268, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4589, PETRI_PLACES=289, PETRI_TRANSITIONS=389} [2024-06-04 16:15:49,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-04 16:15:49,694 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 389 transitions, 4589 flow [2024-06-04 16:15:49,694 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 16:15:49,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:49,694 INFO 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 16:15:49,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 16:15:49,695 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 16:15:49,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:49,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1815232480, now seen corresponding path program 14 times [2024-06-04 16:15:49,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:49,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95828160] [2024-06-04 16:15:49,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:49,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:49,915 INFO 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 16:15:49,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:49,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95828160] [2024-06-04 16:15:49,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95828160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:49,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:49,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:49,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803812385] [2024-06-04 16:15:49,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:49,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:49,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:49,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:49,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:49,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:49,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 389 transitions, 4589 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 16:15:49,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:49,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:49,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:50,655 INFO L124 PetriNetUnfolderBase]: 2216/3797 cut-off events. [2024-06-04 16:15:50,655 INFO L125 PetriNetUnfolderBase]: For 252851/252851 co-relation queries the response was YES. [2024-06-04 16:15:50,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24017 conditions, 3797 events. 2216/3797 cut-off events. For 252851/252851 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24443 event pairs, 422 based on Foata normal form. 1/3791 useless extension candidates. Maximal degree in co-relation 23879. Up to 3155 conditions per place. [2024-06-04 16:15:50,704 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 158 changer transitions 0/415 dead transitions. [2024-06-04 16:15:50,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 415 transitions, 5824 flow [2024-06-04 16:15:50,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:15:50,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:15:50,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 16:15:50,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-04 16:15:50,706 INFO L175 Difference]: Start difference. First operand has 289 places, 389 transitions, 4589 flow. Second operand 8 states and 191 transitions. [2024-06-04 16:15:50,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 415 transitions, 5824 flow [2024-06-04 16:15:51,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 415 transitions, 5490 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 16:15:51,644 INFO L231 Difference]: Finished difference. Result has 289 places, 392 transitions, 4644 flow [2024-06-04 16:15:51,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4265, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4644, PETRI_PLACES=289, PETRI_TRANSITIONS=392} [2024-06-04 16:15:51,645 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-04 16:15:51,645 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 392 transitions, 4644 flow [2024-06-04 16:15:51,645 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 16:15:51,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:51,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:51,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 16:15:51,645 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 16:15:51,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:51,646 INFO L85 PathProgramCache]: Analyzing trace with hash -939411082, now seen corresponding path program 15 times [2024-06-04 16:15:51,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:51,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796589683] [2024-06-04 16:15:51,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:51,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:51,869 INFO 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 16:15:51,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:51,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796589683] [2024-06-04 16:15:51,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796589683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:51,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:51,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:51,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79429838] [2024-06-04 16:15:51,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:51,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:51,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:51,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:51,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:51,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:51,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 392 transitions, 4644 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 16:15:51,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:51,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:51,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:52,585 INFO L124 PetriNetUnfolderBase]: 2213/3805 cut-off events. [2024-06-04 16:15:52,586 INFO L125 PetriNetUnfolderBase]: For 250457/250463 co-relation queries the response was YES. [2024-06-04 16:15:52,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23923 conditions, 3805 events. 2213/3805 cut-off events. For 250457/250463 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24554 event pairs, 417 based on Foata normal form. 5/3805 useless extension candidates. Maximal degree in co-relation 23785. Up to 3152 conditions per place. [2024-06-04 16:15:52,630 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 249 selfloop transitions, 163 changer transitions 0/419 dead transitions. [2024-06-04 16:15:52,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 419 transitions, 5686 flow [2024-06-04 16:15:52,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:15:52,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:15:52,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-04 16:15:52,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452380952380952 [2024-06-04 16:15:52,632 INFO L175 Difference]: Start difference. First operand has 289 places, 392 transitions, 4644 flow. Second operand 10 states and 229 transitions. [2024-06-04 16:15:52,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 419 transitions, 5686 flow [2024-06-04 16:15:53,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 419 transitions, 5405 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:53,347 INFO L231 Difference]: Finished difference. Result has 294 places, 392 transitions, 4699 flow [2024-06-04 16:15:53,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4363, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4699, PETRI_PLACES=294, PETRI_TRANSITIONS=392} [2024-06-04 16:15:53,347 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-04 16:15:53,347 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 392 transitions, 4699 flow [2024-06-04 16:15:53,348 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 16:15:53,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:53,348 INFO 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 16:15:53,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 16:15:53,348 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 16:15:53,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:53,348 INFO L85 PathProgramCache]: Analyzing trace with hash -698183360, now seen corresponding path program 16 times [2024-06-04 16:15:53,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:53,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484264437] [2024-06-04 16:15:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:53,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:53,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:53,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:53,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484264437] [2024-06-04 16:15:53,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484264437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:53,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:53,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:53,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076524797] [2024-06-04 16:15:53,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:53,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:53,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:53,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:53,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:53,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:53,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 392 transitions, 4699 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 16:15:53,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:53,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:53,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:54,243 INFO L124 PetriNetUnfolderBase]: 2210/3790 cut-off events. [2024-06-04 16:15:54,244 INFO L125 PetriNetUnfolderBase]: For 253168/253168 co-relation queries the response was YES. [2024-06-04 16:15:54,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23914 conditions, 3790 events. 2210/3790 cut-off events. For 253168/253168 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24384 event pairs, 420 based on Foata normal form. 1/3784 useless extension candidates. Maximal degree in co-relation 23775. Up to 3149 conditions per place. [2024-06-04 16:15:54,290 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 161 changer transitions 0/418 dead transitions. [2024-06-04 16:15:54,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 418 transitions, 5891 flow [2024-06-04 16:15:54,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:15:54,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:15:54,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-04 16:15:54,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324675324675324 [2024-06-04 16:15:54,291 INFO L175 Difference]: Start difference. First operand has 294 places, 392 transitions, 4699 flow. Second operand 11 states and 246 transitions. [2024-06-04 16:15:54,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 418 transitions, 5891 flow [2024-06-04 16:15:55,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 418 transitions, 5513 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-04 16:15:55,113 INFO L231 Difference]: Finished difference. Result has 296 places, 392 transitions, 4657 flow [2024-06-04 16:15:55,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4325, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4657, PETRI_PLACES=296, PETRI_TRANSITIONS=392} [2024-06-04 16:15:55,114 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-04 16:15:55,114 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 392 transitions, 4657 flow [2024-06-04 16:15:55,114 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 16:15:55,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:55,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:55,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 16:15:55,114 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 16:15:55,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:55,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1178603092, now seen corresponding path program 17 times [2024-06-04 16:15:55,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:55,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916369628] [2024-06-04 16:15:55,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:55,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:55,335 INFO 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 16:15:55,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:55,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916369628] [2024-06-04 16:15:55,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916369628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:55,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:55,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:55,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388388128] [2024-06-04 16:15:55,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:55,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:55,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:55,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:55,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:55,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:55,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 392 transitions, 4657 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 16:15:55,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:55,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:55,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:56,038 INFO L124 PetriNetUnfolderBase]: 2207/3786 cut-off events. [2024-06-04 16:15:56,038 INFO L125 PetriNetUnfolderBase]: For 249779/249779 co-relation queries the response was YES. [2024-06-04 16:15:56,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23768 conditions, 3786 events. 2207/3786 cut-off events. For 249779/249779 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24381 event pairs, 420 based on Foata normal form. 1/3780 useless extension candidates. Maximal degree in co-relation 23628. Up to 3146 conditions per place. [2024-06-04 16:15:56,089 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 161 changer transitions 0/419 dead transitions. [2024-06-04 16:15:56,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 419 transitions, 5699 flow [2024-06-04 16:15:56,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:15:56,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:15:56,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 282 transitions. [2024-06-04 16:15:56,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164835164835165 [2024-06-04 16:15:56,090 INFO L175 Difference]: Start difference. First operand has 296 places, 392 transitions, 4657 flow. Second operand 13 states and 282 transitions. [2024-06-04 16:15:56,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 419 transitions, 5699 flow [2024-06-04 16:15:56,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 419 transitions, 5392 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-04 16:15:57,002 INFO L231 Difference]: Finished difference. Result has 302 places, 392 transitions, 4684 flow [2024-06-04 16:15:57,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4352, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4684, PETRI_PLACES=302, PETRI_TRANSITIONS=392} [2024-06-04 16:15:57,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-04 16:15:57,003 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 392 transitions, 4684 flow [2024-06-04 16:15:57,003 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 16:15:57,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:57,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:57,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 16:15:57,004 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 16:15:57,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:57,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2014267360, now seen corresponding path program 18 times [2024-06-04 16:15:57,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:57,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685144976] [2024-06-04 16:15:57,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:57,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:57,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:57,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685144976] [2024-06-04 16:15:57,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685144976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:57,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:57,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:57,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018328211] [2024-06-04 16:15:57,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:57,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:57,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:57,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:57,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:57,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:57,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 392 transitions, 4684 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 16:15:57,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:57,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:57,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:57,835 INFO L124 PetriNetUnfolderBase]: 2204/3791 cut-off events. [2024-06-04 16:15:57,836 INFO L125 PetriNetUnfolderBase]: For 246084/246084 co-relation queries the response was YES. [2024-06-04 16:15:57,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23674 conditions, 3791 events. 2204/3791 cut-off events. For 246084/246084 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24402 event pairs, 398 based on Foata normal form. 1/3789 useless extension candidates. Maximal degree in co-relation 23533. Up to 3288 conditions per place. [2024-06-04 16:15:57,883 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 350 selfloop transitions, 59 changer transitions 0/416 dead transitions. [2024-06-04 16:15:57,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 416 transitions, 5741 flow [2024-06-04 16:15:57,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:57,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:57,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-04 16:15:57,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-04 16:15:57,884 INFO L175 Difference]: Start difference. First operand has 302 places, 392 transitions, 4684 flow. Second operand 6 states and 156 transitions. [2024-06-04 16:15:57,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 416 transitions, 5741 flow [2024-06-04 16:15:58,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 416 transitions, 5369 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-06-04 16:15:58,527 INFO L231 Difference]: Finished difference. Result has 296 places, 393 transitions, 4505 flow [2024-06-04 16:15:58,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4316, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4505, PETRI_PLACES=296, PETRI_TRANSITIONS=393} [2024-06-04 16:15:58,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-04 16:15:58,528 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 393 transitions, 4505 flow [2024-06-04 16:15:58,528 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 16:15:58,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:58,529 INFO 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 16:15:58,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 16:15:58,529 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 16:15:58,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:58,529 INFO L85 PathProgramCache]: Analyzing trace with hash -346395850, now seen corresponding path program 19 times [2024-06-04 16:15:58,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:58,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589335162] [2024-06-04 16:15:58,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:58,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:58,747 INFO 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 16:15:58,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:58,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589335162] [2024-06-04 16:15:58,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589335162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:58,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:58,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:58,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502048205] [2024-06-04 16:15:58,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:58,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:58,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:58,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:58,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:58,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:58,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 393 transitions, 4505 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 16:15:58,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:58,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:58,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:59,362 INFO L124 PetriNetUnfolderBase]: 2201/3787 cut-off events. [2024-06-04 16:15:59,362 INFO L125 PetriNetUnfolderBase]: For 242669/242669 co-relation queries the response was YES. [2024-06-04 16:15:59,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23390 conditions, 3787 events. 2201/3787 cut-off events. For 242669/242669 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24382 event pairs, 398 based on Foata normal form. 1/3785 useless extension candidates. Maximal degree in co-relation 23248. Up to 3285 conditions per place. [2024-06-04 16:15:59,407 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 352 selfloop transitions, 56 changer transitions 0/415 dead transitions. [2024-06-04 16:15:59,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 415 transitions, 5377 flow [2024-06-04 16:15:59,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:59,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:59,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-04 16:15:59,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-04 16:15:59,409 INFO L175 Difference]: Start difference. First operand has 296 places, 393 transitions, 4505 flow. Second operand 6 states and 154 transitions. [2024-06-04 16:15:59,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 415 transitions, 5377 flow [2024-06-04 16:16:00,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 415 transitions, 5157 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:00,119 INFO L231 Difference]: Finished difference. Result has 296 places, 393 transitions, 4411 flow [2024-06-04 16:16:00,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4285, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4411, PETRI_PLACES=296, PETRI_TRANSITIONS=393} [2024-06-04 16:16:00,119 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-04 16:16:00,119 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 393 transitions, 4411 flow [2024-06-04 16:16:00,120 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 16:16:00,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:00,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:00,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 16:16:00,120 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 16:16:00,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:00,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1106909654, now seen corresponding path program 1 times [2024-06-04 16:16:00,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:00,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669966187] [2024-06-04 16:16:00,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:00,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:00,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:00,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669966187] [2024-06-04 16:16:00,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669966187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:00,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:00,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:00,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17801268] [2024-06-04 16:16:00,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:00,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:00,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:00,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:00,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:00,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:00,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 393 transitions, 4411 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 16:16:00,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:00,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:00,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:01,070 INFO L124 PetriNetUnfolderBase]: 2320/3971 cut-off events. [2024-06-04 16:16:01,070 INFO L125 PetriNetUnfolderBase]: For 321467/321467 co-relation queries the response was YES. [2024-06-04 16:16:01,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25682 conditions, 3971 events. 2320/3971 cut-off events. For 321467/321467 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 25710 event pairs, 443 based on Foata normal form. 12/3975 useless extension candidates. Maximal degree in co-relation 25539. Up to 2982 conditions per place. [2024-06-04 16:16:01,121 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 185 changer transitions 0/427 dead transitions. [2024-06-04 16:16:01,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 427 transitions, 5599 flow [2024-06-04 16:16:01,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:01,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 16:16:01,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:16:01,122 INFO L175 Difference]: Start difference. First operand has 296 places, 393 transitions, 4411 flow. Second operand 8 states and 196 transitions. [2024-06-04 16:16:01,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 427 transitions, 5599 flow [2024-06-04 16:16:01,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 427 transitions, 5385 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-04 16:16:01,978 INFO L231 Difference]: Finished difference. Result has 297 places, 397 transitions, 4676 flow [2024-06-04 16:16:01,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4197, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4676, PETRI_PLACES=297, PETRI_TRANSITIONS=397} [2024-06-04 16:16:01,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-04 16:16:01,978 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 397 transitions, 4676 flow [2024-06-04 16:16:01,979 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 16:16:01,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:01,979 INFO 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 16:16:01,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 16:16:01,979 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 16:16:01,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:01,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1018196024, now seen corresponding path program 2 times [2024-06-04 16:16:01,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:01,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11723071] [2024-06-04 16:16:01,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:01,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:02,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:02,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11723071] [2024-06-04 16:16:02,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11723071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:02,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:02,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:02,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670201175] [2024-06-04 16:16:02,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:02,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:02,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:02,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:02,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:02,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:02,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 397 transitions, 4676 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 16:16:02,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:02,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:02,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:02,898 INFO L124 PetriNetUnfolderBase]: 2376/4062 cut-off events. [2024-06-04 16:16:02,899 INFO L125 PetriNetUnfolderBase]: For 345766/345766 co-relation queries the response was YES. [2024-06-04 16:16:02,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26830 conditions, 4062 events. 2376/4062 cut-off events. For 345766/345766 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 26359 event pairs, 506 based on Foata normal form. 16/4070 useless extension candidates. Maximal degree in co-relation 26687. Up to 3316 conditions per place. [2024-06-04 16:16:02,949 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 173 changer transitions 0/421 dead transitions. [2024-06-04 16:16:02,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 421 transitions, 5626 flow [2024-06-04 16:16:02,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:02,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:02,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-04 16:16:02,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-04 16:16:02,951 INFO L175 Difference]: Start difference. First operand has 297 places, 397 transitions, 4676 flow. Second operand 8 states and 189 transitions. [2024-06-04 16:16:02,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 421 transitions, 5626 flow [2024-06-04 16:16:03,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 421 transitions, 5369 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-04 16:16:03,704 INFO L231 Difference]: Finished difference. Result has 301 places, 399 transitions, 4829 flow [2024-06-04 16:16:03,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4425, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4829, PETRI_PLACES=301, PETRI_TRANSITIONS=399} [2024-06-04 16:16:03,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-04 16:16:03,705 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 399 transitions, 4829 flow [2024-06-04 16:16:03,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:03,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:03,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:03,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 16:16:03,705 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:03,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:03,705 INFO L85 PathProgramCache]: Analyzing trace with hash -250154076, now seen corresponding path program 3 times [2024-06-04 16:16:03,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:03,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343344841] [2024-06-04 16:16:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:03,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:03,956 INFO 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 16:16:03,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:03,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343344841] [2024-06-04 16:16:03,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343344841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:03,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:03,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:03,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932347148] [2024-06-04 16:16:03,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:03,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:03,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:03,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:03,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:04,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:04,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 399 transitions, 4829 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 16:16:04,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:04,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:04,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:04,699 INFO L124 PetriNetUnfolderBase]: 2416/4126 cut-off events. [2024-06-04 16:16:04,699 INFO L125 PetriNetUnfolderBase]: For 340893/340893 co-relation queries the response was YES. [2024-06-04 16:16:04,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27490 conditions, 4126 events. 2416/4126 cut-off events. For 340893/340893 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26851 event pairs, 502 based on Foata normal form. 12/4130 useless extension candidates. Maximal degree in co-relation 27345. Up to 3320 conditions per place. [2024-06-04 16:16:04,751 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 242 selfloop transitions, 177 changer transitions 0/426 dead transitions. [2024-06-04 16:16:04,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 426 transitions, 5801 flow [2024-06-04 16:16:04,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:04,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:04,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 16:16:04,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:16:04,752 INFO L175 Difference]: Start difference. First operand has 301 places, 399 transitions, 4829 flow. Second operand 8 states and 192 transitions. [2024-06-04 16:16:04,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 426 transitions, 5801 flow [2024-06-04 16:16:05,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 426 transitions, 5433 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:05,618 INFO L231 Difference]: Finished difference. Result has 303 places, 401 transitions, 4876 flow [2024-06-04 16:16:05,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4461, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4876, PETRI_PLACES=303, PETRI_TRANSITIONS=401} [2024-06-04 16:16:05,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-04 16:16:05,621 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 401 transitions, 4876 flow [2024-06-04 16:16:05,621 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 16:16:05,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:05,621 INFO 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 16:16:05,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 16:16:05,622 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 16:16:05,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:05,622 INFO L85 PathProgramCache]: Analyzing trace with hash -970947232, now seen corresponding path program 4 times [2024-06-04 16:16:05,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:05,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413263995] [2024-06-04 16:16:05,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:05,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:05,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:05,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:05,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413263995] [2024-06-04 16:16:05,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413263995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:05,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:05,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:05,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674294521] [2024-06-04 16:16:05,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:05,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:05,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:05,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:05,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:05,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:05,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 401 transitions, 4876 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 16:16:05,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:05,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:05,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:06,696 INFO L124 PetriNetUnfolderBase]: 2472/4230 cut-off events. [2024-06-04 16:16:06,696 INFO L125 PetriNetUnfolderBase]: For 363179/363179 co-relation queries the response was YES. [2024-06-04 16:16:06,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28160 conditions, 4230 events. 2472/4230 cut-off events. For 363179/363179 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 27720 event pairs, 493 based on Foata normal form. 16/4239 useless extension candidates. Maximal degree in co-relation 28014. Up to 3630 conditions per place. [2024-06-04 16:16:06,743 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 337 selfloop transitions, 78 changer transitions 0/422 dead transitions. [2024-06-04 16:16:06,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 422 transitions, 5822 flow [2024-06-04 16:16:06,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:06,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:06,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-04 16:16:06,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2024-06-04 16:16:06,744 INFO L175 Difference]: Start difference. First operand has 303 places, 401 transitions, 4876 flow. Second operand 8 states and 185 transitions. [2024-06-04 16:16:06,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 422 transitions, 5822 flow [2024-06-04 16:16:07,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 422 transitions, 5435 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:07,702 INFO L231 Difference]: Finished difference. Result has 305 places, 403 transitions, 4711 flow [2024-06-04 16:16:07,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4489, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4711, PETRI_PLACES=305, PETRI_TRANSITIONS=403} [2024-06-04 16:16:07,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-04 16:16:07,702 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 403 transitions, 4711 flow [2024-06-04 16:16:07,703 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 16:16:07,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:07,703 INFO 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 16:16:07,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 16:16:07,703 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 16:16:07,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:07,703 INFO L85 PathProgramCache]: Analyzing trace with hash -971095102, now seen corresponding path program 5 times [2024-06-04 16:16:07,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:07,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464295201] [2024-06-04 16:16:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:07,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:07,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:07,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464295201] [2024-06-04 16:16:07,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464295201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:07,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:07,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:07,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22453957] [2024-06-04 16:16:07,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:07,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:07,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:07,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:07,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:07,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:07,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 403 transitions, 4711 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 16:16:07,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:07,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:07,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:08,736 INFO L124 PetriNetUnfolderBase]: 2604/4434 cut-off events. [2024-06-04 16:16:08,736 INFO L125 PetriNetUnfolderBase]: For 415377/415377 co-relation queries the response was YES. [2024-06-04 16:16:08,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30693 conditions, 4434 events. 2604/4434 cut-off events. For 415377/415377 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 29124 event pairs, 513 based on Foata normal form. 12/4439 useless extension candidates. Maximal degree in co-relation 30546. Up to 3674 conditions per place. [2024-06-04 16:16:08,790 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 339 selfloop transitions, 84 changer transitions 0/430 dead transitions. [2024-06-04 16:16:08,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 430 transitions, 5915 flow [2024-06-04 16:16:08,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:08,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:08,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-04 16:16:08,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:16:08,791 INFO L175 Difference]: Start difference. First operand has 305 places, 403 transitions, 4711 flow. Second operand 8 states and 188 transitions. [2024-06-04 16:16:08,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 430 transitions, 5915 flow [2024-06-04 16:16:09,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 430 transitions, 5729 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:09,739 INFO L231 Difference]: Finished difference. Result has 307 places, 407 transitions, 4822 flow [2024-06-04 16:16:09,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4525, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4822, PETRI_PLACES=307, PETRI_TRANSITIONS=407} [2024-06-04 16:16:09,739 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-04 16:16:09,739 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 407 transitions, 4822 flow [2024-06-04 16:16:09,739 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 16:16:09,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:09,739 INFO 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 16:16:09,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 16:16:09,740 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 16:16:09,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:09,740 INFO L85 PathProgramCache]: Analyzing trace with hash -965584852, now seen corresponding path program 6 times [2024-06-04 16:16:09,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:09,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917236009] [2024-06-04 16:16:09,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:09,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:09,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:09,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917236009] [2024-06-04 16:16:09,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917236009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:09,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:09,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:09,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723882349] [2024-06-04 16:16:09,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:09,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:09,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:09,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:09,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:10,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:10,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 407 transitions, 4822 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 16:16:10,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:10,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:10,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:10,822 INFO L124 PetriNetUnfolderBase]: 2568/4382 cut-off events. [2024-06-04 16:16:10,822 INFO L125 PetriNetUnfolderBase]: For 383203/383203 co-relation queries the response was YES. [2024-06-04 16:16:10,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29003 conditions, 4382 events. 2568/4382 cut-off events. For 383203/383203 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 28780 event pairs, 509 based on Foata normal form. 16/4391 useless extension candidates. Maximal degree in co-relation 28855. Up to 3782 conditions per place. [2024-06-04 16:16:10,901 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 342 selfloop transitions, 79 changer transitions 0/428 dead transitions. [2024-06-04 16:16:10,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 428 transitions, 5728 flow [2024-06-04 16:16:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:16:10,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:16:10,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-04 16:16:10,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261904761904762 [2024-06-04 16:16:10,903 INFO L175 Difference]: Start difference. First operand has 307 places, 407 transitions, 4822 flow. Second operand 10 states and 221 transitions. [2024-06-04 16:16:10,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 428 transitions, 5728 flow [2024-06-04 16:16:11,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 428 transitions, 5561 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-04 16:16:11,902 INFO L231 Difference]: Finished difference. Result has 313 places, 407 transitions, 4819 flow [2024-06-04 16:16:11,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4655, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4819, PETRI_PLACES=313, PETRI_TRANSITIONS=407} [2024-06-04 16:16:11,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-04 16:16:11,903 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 407 transitions, 4819 flow [2024-06-04 16:16:11,903 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 16:16:11,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:11,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:11,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 16:16:11,903 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 16:16:11,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:11,904 INFO L85 PathProgramCache]: Analyzing trace with hash -965369650, now seen corresponding path program 1 times [2024-06-04 16:16:11,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:11,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139667524] [2024-06-04 16:16:11,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:11,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:12,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:12,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139667524] [2024-06-04 16:16:12,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139667524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:12,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:12,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:12,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752592580] [2024-06-04 16:16:12,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:12,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:12,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:12,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:12,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:12,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:12,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 407 transitions, 4819 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 16:16:12,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:12,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:12,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:12,938 INFO L124 PetriNetUnfolderBase]: 2608/4454 cut-off events. [2024-06-04 16:16:12,938 INFO L125 PetriNetUnfolderBase]: For 374214/374214 co-relation queries the response was YES. [2024-06-04 16:16:12,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29305 conditions, 4454 events. 2608/4454 cut-off events. For 374214/374214 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 29365 event pairs, 511 based on Foata normal form. 12/4459 useless extension candidates. Maximal degree in co-relation 29155. Up to 3722 conditions per place. [2024-06-04 16:16:12,994 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 340 selfloop transitions, 86 changer transitions 0/433 dead transitions. [2024-06-04 16:16:12,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 433 transitions, 5803 flow [2024-06-04 16:16:12,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:16:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:16:12,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-04 16:16:12,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.530952380952381 [2024-06-04 16:16:12,995 INFO L175 Difference]: Start difference. First operand has 313 places, 407 transitions, 4819 flow. Second operand 10 states and 223 transitions. [2024-06-04 16:16:12,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 433 transitions, 5803 flow [2024-06-04 16:16:13,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 433 transitions, 5629 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-04 16:16:13,998 INFO L231 Difference]: Finished difference. Result has 314 places, 409 transitions, 4880 flow [2024-06-04 16:16:13,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4645, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4880, PETRI_PLACES=314, PETRI_TRANSITIONS=409} [2024-06-04 16:16:13,999 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-04 16:16:13,999 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 409 transitions, 4880 flow [2024-06-04 16:16:13,999 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 16:16:13,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:13,999 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] [2024-06-04 16:16:13,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 16:16:13,999 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 16:16:14,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:14,000 INFO L85 PathProgramCache]: Analyzing trace with hash -346385930, now seen corresponding path program 7 times [2024-06-04 16:16:14,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:14,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408564915] [2024-06-04 16:16:14,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:14,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:14,245 INFO 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 16:16:14,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:14,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408564915] [2024-06-04 16:16:14,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408564915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:14,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:14,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:14,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196837416] [2024-06-04 16:16:14,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:14,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:14,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:14,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:14,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:14,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:14,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 409 transitions, 4880 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 16:16:14,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:14,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:14,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:15,075 INFO L124 PetriNetUnfolderBase]: 2672/4571 cut-off events. [2024-06-04 16:16:15,075 INFO L125 PetriNetUnfolderBase]: For 399350/399350 co-relation queries the response was YES. [2024-06-04 16:16:15,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30262 conditions, 4571 events. 2672/4571 cut-off events. For 399350/399350 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 30284 event pairs, 452 based on Foata normal form. 16/4584 useless extension candidates. Maximal degree in co-relation 30111. Up to 3914 conditions per place. [2024-06-04 16:16:15,139 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 369 selfloop transitions, 67 changer transitions 0/443 dead transitions. [2024-06-04 16:16:15,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 443 transitions, 5924 flow [2024-06-04 16:16:15,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:16:15,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:16:15,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-04 16:16:15,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-04 16:16:15,140 INFO L175 Difference]: Start difference. First operand has 314 places, 409 transitions, 4880 flow. Second operand 7 states and 181 transitions. [2024-06-04 16:16:15,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 443 transitions, 5924 flow [2024-06-04 16:16:16,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 443 transitions, 5715 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-04 16:16:16,206 INFO L231 Difference]: Finished difference. Result has 313 places, 413 transitions, 4909 flow [2024-06-04 16:16:16,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4671, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4909, PETRI_PLACES=313, PETRI_TRANSITIONS=413} [2024-06-04 16:16:16,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-04 16:16:16,207 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 413 transitions, 4909 flow [2024-06-04 16:16:16,207 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 16:16:16,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:16,207 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] [2024-06-04 16:16:16,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 16:16:16,207 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 16:16:16,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:16,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1178613012, now seen corresponding path program 8 times [2024-06-04 16:16:16,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:16,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849215515] [2024-06-04 16:16:16,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:16,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:16,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:16,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849215515] [2024-06-04 16:16:16,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849215515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:16,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:16,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:16,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720568025] [2024-06-04 16:16:16,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:16,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:16,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:16,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:16,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:16,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:16,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 413 transitions, 4909 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 16:16:16,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:16,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:16,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:17,373 INFO L124 PetriNetUnfolderBase]: 2728/4642 cut-off events. [2024-06-04 16:16:17,373 INFO L125 PetriNetUnfolderBase]: For 412348/412348 co-relation queries the response was YES. [2024-06-04 16:16:17,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30934 conditions, 4642 events. 2728/4642 cut-off events. For 412348/412348 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 30802 event pairs, 539 based on Foata normal form. 16/4651 useless extension candidates. Maximal degree in co-relation 30782. Up to 3841 conditions per place. [2024-06-04 16:16:17,431 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 269 selfloop transitions, 166 changer transitions 0/442 dead transitions. [2024-06-04 16:16:17,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 442 transitions, 5927 flow [2024-06-04 16:16:17,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:16:17,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:16:17,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-04 16:16:17,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:16:17,432 INFO L175 Difference]: Start difference. First operand has 313 places, 413 transitions, 4909 flow. Second operand 10 states and 230 transitions. [2024-06-04 16:16:17,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 442 transitions, 5927 flow [2024-06-04 16:16:18,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 442 transitions, 5783 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-04 16:16:18,466 INFO L231 Difference]: Finished difference. Result has 319 places, 415 transitions, 5179 flow [2024-06-04 16:16:18,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4765, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5179, PETRI_PLACES=319, PETRI_TRANSITIONS=415} [2024-06-04 16:16:18,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-04 16:16:18,467 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 415 transitions, 5179 flow [2024-06-04 16:16:18,467 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 16:16:18,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:18,467 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] [2024-06-04 16:16:18,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 16:16:18,467 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 16:16:18,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:18,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1173106482, now seen corresponding path program 9 times [2024-06-04 16:16:18,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:18,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430144168] [2024-06-04 16:16:18,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:18,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:18,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:18,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430144168] [2024-06-04 16:16:18,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430144168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:18,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:18,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:18,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131191003] [2024-06-04 16:16:18,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:18,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:18,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:18,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:18,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:18,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:18,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 415 transitions, 5179 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 16:16:18,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:18,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:18,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:19,518 INFO L124 PetriNetUnfolderBase]: 2771/4715 cut-off events. [2024-06-04 16:16:19,519 INFO L125 PetriNetUnfolderBase]: For 416005/416005 co-relation queries the response was YES. [2024-06-04 16:16:19,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31579 conditions, 4715 events. 2771/4715 cut-off events. For 416005/416005 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 31352 event pairs, 548 based on Foata normal form. 16/4724 useless extension candidates. Maximal degree in co-relation 31426. Up to 3910 conditions per place. [2024-06-04 16:16:19,581 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 272 selfloop transitions, 163 changer transitions 0/442 dead transitions. [2024-06-04 16:16:19,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 442 transitions, 6197 flow [2024-06-04 16:16:19,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:19,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:19,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 16:16:19,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:16:19,582 INFO L175 Difference]: Start difference. First operand has 319 places, 415 transitions, 5179 flow. Second operand 8 states and 192 transitions. [2024-06-04 16:16:19,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 442 transitions, 6197 flow [2024-06-04 16:16:20,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 442 transitions, 5825 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-04 16:16:20,710 INFO L231 Difference]: Finished difference. Result has 318 places, 417 transitions, 5219 flow [2024-06-04 16:16:20,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4807, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5219, PETRI_PLACES=318, PETRI_TRANSITIONS=417} [2024-06-04 16:16:20,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-04 16:16:20,710 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 417 transitions, 5219 flow [2024-06-04 16:16:20,710 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 16:16:20,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:20,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:20,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 16:16:20,711 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 16:16:20,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:20,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1815094530, now seen corresponding path program 10 times [2024-06-04 16:16:20,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:20,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283948372] [2024-06-04 16:16:20,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:20,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:20,934 INFO 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 16:16:20,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:20,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283948372] [2024-06-04 16:16:20,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283948372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:20,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:20,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:20,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005530571] [2024-06-04 16:16:20,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:20,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:20,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:20,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:20,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:20,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:20,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 417 transitions, 5219 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 16:16:20,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:20,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:20,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:21,841 INFO L124 PetriNetUnfolderBase]: 2778/4737 cut-off events. [2024-06-04 16:16:21,841 INFO L125 PetriNetUnfolderBase]: For 378885/378885 co-relation queries the response was YES. [2024-06-04 16:16:21,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30994 conditions, 4737 events. 2778/4737 cut-off events. For 378885/378885 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 31583 event pairs, 470 based on Foata normal form. 12/4742 useless extension candidates. Maximal degree in co-relation 30841. Up to 3511 conditions per place. [2024-06-04 16:16:21,902 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 261 selfloop transitions, 182 changer transitions 0/450 dead transitions. [2024-06-04 16:16:21,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 450 transitions, 6419 flow [2024-06-04 16:16:21,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:21,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:21,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 16:16:21,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-04 16:16:21,903 INFO L175 Difference]: Start difference. First operand has 318 places, 417 transitions, 5219 flow. Second operand 8 states and 199 transitions. [2024-06-04 16:16:21,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 450 transitions, 6419 flow [2024-06-04 16:16:22,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 450 transitions, 6049 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:22,975 INFO L231 Difference]: Finished difference. Result has 320 places, 418 transitions, 5266 flow [2024-06-04 16:16:22,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4853, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5266, PETRI_PLACES=320, PETRI_TRANSITIONS=418} [2024-06-04 16:16:22,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-04 16:16:22,976 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 418 transitions, 5266 flow [2024-06-04 16:16:22,976 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 16:16:22,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:22,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:22,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 16:16:22,977 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 16:16:22,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:22,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1820819982, now seen corresponding path program 2 times [2024-06-04 16:16:22,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:22,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58025688] [2024-06-04 16:16:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:22,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:23,201 INFO 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 16:16:23,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:23,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58025688] [2024-06-04 16:16:23,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58025688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:23,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:23,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:23,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184128384] [2024-06-04 16:16:23,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:23,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:23,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:23,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:23,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:23,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:23,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 418 transitions, 5266 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 16:16:23,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:23,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:23,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:24,084 INFO L124 PetriNetUnfolderBase]: 2818/4804 cut-off events. [2024-06-04 16:16:24,085 INFO L125 PetriNetUnfolderBase]: For 377861/377861 co-relation queries the response was YES. [2024-06-04 16:16:24,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31388 conditions, 4804 events. 2818/4804 cut-off events. For 377861/377861 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 32032 event pairs, 535 based on Foata normal form. 12/4809 useless extension candidates. Maximal degree in co-relation 31234. Up to 3739 conditions per place. [2024-06-04 16:16:24,246 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 263 selfloop transitions, 180 changer transitions 0/450 dead transitions. [2024-06-04 16:16:24,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 450 transitions, 6304 flow [2024-06-04 16:16:24,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:16:24,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:16:24,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-04 16:16:24,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2024-06-04 16:16:24,247 INFO L175 Difference]: Start difference. First operand has 320 places, 418 transitions, 5266 flow. Second operand 10 states and 232 transitions. [2024-06-04 16:16:24,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 450 transitions, 6304 flow [2024-06-04 16:16:25,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 450 transitions, 5872 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-04 16:16:25,472 INFO L231 Difference]: Finished difference. Result has 322 places, 420 transitions, 5264 flow [2024-06-04 16:16:25,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4834, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5264, PETRI_PLACES=322, PETRI_TRANSITIONS=420} [2024-06-04 16:16:25,472 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-04 16:16:25,472 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 420 transitions, 5264 flow [2024-06-04 16:16:25,472 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 16:16:25,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:25,473 INFO 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 16:16:25,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 16:16:25,473 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 16:16:25,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:25,473 INFO L85 PathProgramCache]: Analyzing trace with hash -89670218, now seen corresponding path program 3 times [2024-06-04 16:16:25,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:25,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633972243] [2024-06-04 16:16:25,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:25,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:25,690 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 16:16:25,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:25,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633972243] [2024-06-04 16:16:25,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633972243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:25,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:25,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:25,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798734890] [2024-06-04 16:16:25,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:25,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:25,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:25,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:25,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:25,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:25,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 420 transitions, 5264 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 16:16:25,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:25,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:25,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:26,599 INFO L124 PetriNetUnfolderBase]: 2858/4889 cut-off events. [2024-06-04 16:16:26,600 INFO L125 PetriNetUnfolderBase]: For 375465/375465 co-relation queries the response was YES. [2024-06-04 16:16:26,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31554 conditions, 4889 events. 2858/4889 cut-off events. For 375465/375465 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 32773 event pairs, 476 based on Foata normal form. 12/4898 useless extension candidates. Maximal degree in co-relation 31401. Up to 4152 conditions per place. [2024-06-04 16:16:26,662 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 376 selfloop transitions, 69 changer transitions 0/452 dead transitions. [2024-06-04 16:16:26,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 452 transitions, 6312 flow [2024-06-04 16:16:26,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:16:26,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:16:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-04 16:16:26,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-04 16:16:26,663 INFO L175 Difference]: Start difference. First operand has 322 places, 420 transitions, 5264 flow. Second operand 7 states and 179 transitions. [2024-06-04 16:16:26,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 452 transitions, 6312 flow [2024-06-04 16:16:27,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 452 transitions, 5908 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-04 16:16:27,648 INFO L231 Difference]: Finished difference. Result has 321 places, 422 transitions, 5069 flow [2024-06-04 16:16:27,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4864, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5069, PETRI_PLACES=321, PETRI_TRANSITIONS=422} [2024-06-04 16:16:27,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-04 16:16:27,649 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 422 transitions, 5069 flow [2024-06-04 16:16:27,649 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 16:16:27,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:27,650 INFO 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 16:16:27,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 16:16:27,650 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 16:16:27,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:27,651 INFO L85 PathProgramCache]: Analyzing trace with hash -80473448, now seen corresponding path program 4 times [2024-06-04 16:16:27,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:27,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48056188] [2024-06-04 16:16:27,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:27,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:27,886 INFO 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 16:16:27,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:27,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48056188] [2024-06-04 16:16:27,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48056188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:27,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:27,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:27,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551727756] [2024-06-04 16:16:27,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:27,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:27,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:27,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:27,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:27,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:27,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 422 transitions, 5069 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 16:16:27,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:27,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:27,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:28,893 INFO L124 PetriNetUnfolderBase]: 2924/5001 cut-off events. [2024-06-04 16:16:28,894 INFO L125 PetriNetUnfolderBase]: For 392248/392248 co-relation queries the response was YES. [2024-06-04 16:16:28,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32280 conditions, 5001 events. 2924/5001 cut-off events. For 392248/392248 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 33667 event pairs, 457 based on Foata normal form. 12/5010 useless extension candidates. Maximal degree in co-relation 32126. Up to 3972 conditions per place. [2024-06-04 16:16:28,956 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 375 selfloop transitions, 72 changer transitions 0/454 dead transitions. [2024-06-04 16:16:28,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 454 transitions, 6315 flow [2024-06-04 16:16:28,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:16:28,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:16:28,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 16:16:28,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-04 16:16:28,957 INFO L175 Difference]: Start difference. First operand has 321 places, 422 transitions, 5069 flow. Second operand 7 states and 176 transitions. [2024-06-04 16:16:28,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 454 transitions, 6315 flow [2024-06-04 16:16:29,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 454 transitions, 6136 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-04 16:16:29,853 INFO L231 Difference]: Finished difference. Result has 324 places, 425 transitions, 5168 flow [2024-06-04 16:16:29,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4890, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5168, PETRI_PLACES=324, PETRI_TRANSITIONS=425} [2024-06-04 16:16:29,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-04 16:16:29,854 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 425 transitions, 5168 flow [2024-06-04 16:16:29,854 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 16:16:29,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:29,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:29,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 16:16:29,855 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 16:16:29,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:29,855 INFO L85 PathProgramCache]: Analyzing trace with hash -163199762, now seen corresponding path program 1 times [2024-06-04 16:16:29,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:29,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728270257] [2024-06-04 16:16:29,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:29,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:30,096 INFO 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 16:16:30,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:30,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728270257] [2024-06-04 16:16:30,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728270257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:30,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:30,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:16:30,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273026050] [2024-06-04 16:16:30,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:30,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:16:30,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:30,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:16:30,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:16:30,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:30,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 425 transitions, 5168 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 16:16:30,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:30,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:30,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:31,015 INFO L124 PetriNetUnfolderBase]: 2945/5027 cut-off events. [2024-06-04 16:16:31,016 INFO L125 PetriNetUnfolderBase]: For 367529/367535 co-relation queries the response was YES. [2024-06-04 16:16:31,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32786 conditions, 5027 events. 2945/5027 cut-off events. For 367529/367535 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 33880 event pairs, 587 based on Foata normal form. 1/5021 useless extension candidates. Maximal degree in co-relation 32630. Up to 4244 conditions per place. [2024-06-04 16:16:31,080 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 353 selfloop transitions, 114 changer transitions 0/474 dead transitions. [2024-06-04 16:16:31,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 474 transitions, 6860 flow [2024-06-04 16:16:31,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:16:31,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:16:31,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-04 16:16:31,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58994708994709 [2024-06-04 16:16:31,081 INFO L175 Difference]: Start difference. First operand has 324 places, 425 transitions, 5168 flow. Second operand 9 states and 223 transitions. [2024-06-04 16:16:31,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 474 transitions, 6860 flow [2024-06-04 16:16:32,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 474 transitions, 6732 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-04 16:16:32,227 INFO L231 Difference]: Finished difference. Result has 329 places, 437 transitions, 5424 flow [2024-06-04 16:16:32,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5040, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5424, PETRI_PLACES=329, PETRI_TRANSITIONS=437} [2024-06-04 16:16:32,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-04 16:16:32,228 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 437 transitions, 5424 flow [2024-06-04 16:16:32,228 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 16:16:32,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:32,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:32,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 16:16:32,228 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 16:16:32,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:32,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1040982994, now seen corresponding path program 2 times [2024-06-04 16:16:32,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:32,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861007356] [2024-06-04 16:16:32,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:32,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:32,503 INFO 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 16:16:32,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:32,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861007356] [2024-06-04 16:16:32,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861007356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:32,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:32,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:16:32,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922996710] [2024-06-04 16:16:32,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:32,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:16:32,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:32,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:16:32,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:16:32,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:32,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 437 transitions, 5424 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 16:16:32,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:32,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:32,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:33,426 INFO L124 PetriNetUnfolderBase]: 2955/5045 cut-off events. [2024-06-04 16:16:33,427 INFO L125 PetriNetUnfolderBase]: For 374209/374215 co-relation queries the response was YES. [2024-06-04 16:16:33,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33357 conditions, 5045 events. 2955/5045 cut-off events. For 374209/374215 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 34046 event pairs, 572 based on Foata normal form. 5/5045 useless extension candidates. Maximal degree in co-relation 33200. Up to 4442 conditions per place. [2024-06-04 16:16:33,497 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 403 selfloop transitions, 64 changer transitions 0/474 dead transitions. [2024-06-04 16:16:33,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 474 transitions, 6517 flow [2024-06-04 16:16:33,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:16:33,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:16:33,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-04 16:16:33,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608465608465608 [2024-06-04 16:16:33,498 INFO L175 Difference]: Start difference. First operand has 329 places, 437 transitions, 5424 flow. Second operand 9 states and 212 transitions. [2024-06-04 16:16:33,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 474 transitions, 6517 flow [2024-06-04 16:16:34,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 474 transitions, 6317 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-04 16:16:34,659 INFO L231 Difference]: Finished difference. Result has 335 places, 443 transitions, 5445 flow [2024-06-04 16:16:34,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5249, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5445, PETRI_PLACES=335, PETRI_TRANSITIONS=443} [2024-06-04 16:16:34,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-04 16:16:34,659 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 443 transitions, 5445 flow [2024-06-04 16:16:34,659 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 16:16:34,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:34,660 INFO L208 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 16:16:34,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 16:16:34,660 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 16:16:34,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:34,660 INFO L85 PathProgramCache]: Analyzing trace with hash -163079606, now seen corresponding path program 1 times [2024-06-04 16:16:34,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:34,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555129326] [2024-06-04 16:16:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:34,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:34,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:34,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:34,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555129326] [2024-06-04 16:16:34,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555129326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:34,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:34,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:16:34,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810713266] [2024-06-04 16:16:34,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:34,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:16:34,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:34,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:16:34,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:16:34,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:34,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 443 transitions, 5445 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 16:16:34,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:34,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:34,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:35,822 INFO L124 PetriNetUnfolderBase]: 2976/5078 cut-off events. [2024-06-04 16:16:35,822 INFO L125 PetriNetUnfolderBase]: For 381722/381728 co-relation queries the response was YES. [2024-06-04 16:16:35,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33756 conditions, 5078 events. 2976/5078 cut-off events. For 381722/381728 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 34278 event pairs, 580 based on Foata normal form. 5/5078 useless extension candidates. Maximal degree in co-relation 33597. Up to 4340 conditions per place. [2024-06-04 16:16:35,889 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 350 selfloop transitions, 129 changer transitions 0/486 dead transitions. [2024-06-04 16:16:35,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 486 transitions, 7111 flow [2024-06-04 16:16:35,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:16:35,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:16:35,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-04 16:16:35,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582010582010582 [2024-06-04 16:16:35,890 INFO L175 Difference]: Start difference. First operand has 335 places, 443 transitions, 5445 flow. Second operand 9 states and 220 transitions. [2024-06-04 16:16:35,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 486 transitions, 7111 flow [2024-06-04 16:16:37,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 486 transitions, 6975 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:37,170 INFO L231 Difference]: Finished difference. Result has 338 places, 452 transitions, 5669 flow [2024-06-04 16:16:37,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5309, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5669, PETRI_PLACES=338, PETRI_TRANSITIONS=452} [2024-06-04 16:16:37,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-04 16:16:37,171 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 452 transitions, 5669 flow [2024-06-04 16:16:37,171 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 16:16:37,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:37,171 INFO L208 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 16:16:37,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 16:16:37,171 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 16:16:37,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:37,172 INFO L85 PathProgramCache]: Analyzing trace with hash -275307424, now seen corresponding path program 2 times [2024-06-04 16:16:37,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:37,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209042955] [2024-06-04 16:16:37,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:37,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:37,445 INFO 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 16:16:37,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:37,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209042955] [2024-06-04 16:16:37,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209042955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:37,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:37,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:16:37,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593489312] [2024-06-04 16:16:37,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:37,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:16:37,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:37,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:16:37,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:16:37,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:37,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 452 transitions, 5669 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 16:16:37,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:37,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:37,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:38,371 INFO L124 PetriNetUnfolderBase]: 2994/5103 cut-off events. [2024-06-04 16:16:38,371 INFO L125 PetriNetUnfolderBase]: For 394068/394074 co-relation queries the response was YES. [2024-06-04 16:16:38,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34282 conditions, 5103 events. 2994/5103 cut-off events. For 394068/394074 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 34430 event pairs, 580 based on Foata normal form. 5/5103 useless extension candidates. Maximal degree in co-relation 34122. Up to 4359 conditions per place. [2024-06-04 16:16:38,440 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 353 selfloop transitions, 138 changer transitions 0/498 dead transitions. [2024-06-04 16:16:38,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 498 transitions, 7569 flow [2024-06-04 16:16:38,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:16:38,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:16:38,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 261 transitions. [2024-06-04 16:16:38,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564935064935065 [2024-06-04 16:16:38,441 INFO L175 Difference]: Start difference. First operand has 338 places, 452 transitions, 5669 flow. Second operand 11 states and 261 transitions. [2024-06-04 16:16:38,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 498 transitions, 7569 flow [2024-06-04 16:16:39,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 498 transitions, 7271 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:39,816 INFO L231 Difference]: Finished difference. Result has 344 places, 461 transitions, 5779 flow [2024-06-04 16:16:39,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5387, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5779, PETRI_PLACES=344, PETRI_TRANSITIONS=461} [2024-06-04 16:16:39,817 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-04 16:16:39,817 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 461 transitions, 5779 flow [2024-06-04 16:16:39,817 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 16:16:39,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:39,818 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 16:16:39,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 16:16:39,818 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 16:16:39,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:39,818 INFO L85 PathProgramCache]: Analyzing trace with hash -447790804, now seen corresponding path program 3 times [2024-06-04 16:16:39,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:39,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589064559] [2024-06-04 16:16:39,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:39,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:40,117 INFO 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 16:16:40,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:40,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589064559] [2024-06-04 16:16:40,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589064559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:40,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:40,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:16:40,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385216722] [2024-06-04 16:16:40,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:40,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:16:40,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:40,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:16:40,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:16:40,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:40,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 461 transitions, 5779 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 16:16:40,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:40,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:40,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:41,217 INFO L124 PetriNetUnfolderBase]: 2991/5101 cut-off events. [2024-06-04 16:16:41,218 INFO L125 PetriNetUnfolderBase]: For 398132/398138 co-relation queries the response was YES. [2024-06-04 16:16:41,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34262 conditions, 5101 events. 2991/5101 cut-off events. For 398132/398138 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 34500 event pairs, 580 based on Foata normal form. 5/5101 useless extension candidates. Maximal degree in co-relation 34100. Up to 4356 conditions per place. [2024-06-04 16:16:41,286 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 347 selfloop transitions, 137 changer transitions 0/491 dead transitions. [2024-06-04 16:16:41,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 491 transitions, 7181 flow [2024-06-04 16:16:41,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:16:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:16:41,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-04 16:16:41,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:16:41,288 INFO L175 Difference]: Start difference. First operand has 344 places, 461 transitions, 5779 flow. Second operand 9 states and 216 transitions. [2024-06-04 16:16:41,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 491 transitions, 7181 flow [2024-06-04 16:16:42,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 491 transitions, 6875 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-04 16:16:42,725 INFO L231 Difference]: Finished difference. Result has 345 places, 461 transitions, 5753 flow [2024-06-04 16:16:42,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5473, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5753, PETRI_PLACES=345, PETRI_TRANSITIONS=461} [2024-06-04 16:16:42,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-04 16:16:42,726 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 461 transitions, 5753 flow [2024-06-04 16:16:42,726 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 16:16:42,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:42,726 INFO L208 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 16:16:42,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 16:16:42,727 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 16:16:42,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:42,727 INFO L85 PathProgramCache]: Analyzing trace with hash -275307610, now seen corresponding path program 3 times [2024-06-04 16:16:42,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:42,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012549468] [2024-06-04 16:16:42,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:42,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:42,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:42,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012549468] [2024-06-04 16:16:42,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012549468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:42,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:42,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:16:42,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044587167] [2024-06-04 16:16:42,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:42,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:16:42,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:42,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:16:42,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:16:43,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:43,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 461 transitions, 5753 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 16:16:43,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:43,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:43,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:44,016 INFO L124 PetriNetUnfolderBase]: 3004/5121 cut-off events. [2024-06-04 16:16:44,016 INFO L125 PetriNetUnfolderBase]: For 410218/410224 co-relation queries the response was YES. [2024-06-04 16:16:44,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34510 conditions, 5121 events. 3004/5121 cut-off events. For 410218/410224 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 34608 event pairs, 571 based on Foata normal form. 5/5121 useless extension candidates. Maximal degree in co-relation 34347. Up to 4502 conditions per place. [2024-06-04 16:16:44,087 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 421 selfloop transitions, 74 changer transitions 0/502 dead transitions. [2024-06-04 16:16:44,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 502 transitions, 7065 flow [2024-06-04 16:16:44,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:16:44,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:16:44,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 268 transitions. [2024-06-04 16:16:44,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-04 16:16:44,089 INFO L175 Difference]: Start difference. First operand has 345 places, 461 transitions, 5753 flow. Second operand 12 states and 268 transitions. [2024-06-04 16:16:44,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 502 transitions, 7065 flow [2024-06-04 16:16:45,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 502 transitions, 6783 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 16:16:45,518 INFO L231 Difference]: Finished difference. Result has 351 places, 467 transitions, 5699 flow [2024-06-04 16:16:45,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5471, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5699, PETRI_PLACES=351, PETRI_TRANSITIONS=467} [2024-06-04 16:16:45,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-04 16:16:45,519 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 467 transitions, 5699 flow [2024-06-04 16:16:45,519 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 16:16:45,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:45,519 INFO L208 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 16:16:45,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 16:16:45,519 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 16:16:45,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:45,520 INFO L85 PathProgramCache]: Analyzing trace with hash 654435596, now seen corresponding path program 4 times [2024-06-04 16:16:45,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:45,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586597791] [2024-06-04 16:16:45,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:45,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:45,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:45,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:45,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586597791] [2024-06-04 16:16:45,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586597791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:45,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:45,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:16:45,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642678333] [2024-06-04 16:16:45,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:45,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:16:45,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:45,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:16:45,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:16:45,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:45,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 467 transitions, 5699 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 16:16:45,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:45,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:45,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:46,725 INFO L124 PetriNetUnfolderBase]: 3017/5125 cut-off events. [2024-06-04 16:16:46,726 INFO L125 PetriNetUnfolderBase]: For 421694/421694 co-relation queries the response was YES. [2024-06-04 16:16:46,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34621 conditions, 5125 events. 3017/5125 cut-off events. For 421694/421694 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 34582 event pairs, 590 based on Foata normal form. 1/5118 useless extension candidates. Maximal degree in co-relation 34456. Up to 4476 conditions per place. [2024-06-04 16:16:46,803 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 403 selfloop transitions, 93 changer transitions 0/503 dead transitions. [2024-06-04 16:16:46,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 503 transitions, 7185 flow [2024-06-04 16:16:46,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:16:46,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:16:46,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-04 16:16:46,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-04 16:16:46,817 INFO L175 Difference]: Start difference. First operand has 351 places, 467 transitions, 5699 flow. Second operand 9 states and 213 transitions. [2024-06-04 16:16:46,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 503 transitions, 7185 flow [2024-06-04 16:16:48,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 503 transitions, 7002 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-04 16:16:48,272 INFO L231 Difference]: Finished difference. Result has 350 places, 473 transitions, 5760 flow [2024-06-04 16:16:48,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5516, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5760, PETRI_PLACES=350, PETRI_TRANSITIONS=473} [2024-06-04 16:16:48,273 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-04 16:16:48,273 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 473 transitions, 5760 flow [2024-06-04 16:16:48,273 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 16:16:48,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:48,273 INFO L208 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 16:16:48,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 16:16:48,274 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 16:16:48,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:48,274 INFO L85 PathProgramCache]: Analyzing trace with hash 634300144, now seen corresponding path program 5 times [2024-06-04 16:16:48,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:48,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401772262] [2024-06-04 16:16:48,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:48,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:48,504 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 16:16:48,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:48,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401772262] [2024-06-04 16:16:48,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401772262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:48,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:48,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:16:48,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040705132] [2024-06-04 16:16:48,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:48,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:16:48,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:48,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:16:48,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:16:48,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:48,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 473 transitions, 5760 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 16:16:48,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:48,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:48,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:49,511 INFO L124 PetriNetUnfolderBase]: 3030/5149 cut-off events. [2024-06-04 16:16:49,512 INFO L125 PetriNetUnfolderBase]: For 434546/434546 co-relation queries the response was YES. [2024-06-04 16:16:49,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34922 conditions, 5149 events. 3030/5149 cut-off events. For 434546/434546 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 34793 event pairs, 590 based on Foata normal form. 1/5142 useless extension candidates. Maximal degree in co-relation 34757. Up to 4346 conditions per place. [2024-06-04 16:16:49,600 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 358 selfloop transitions, 150 changer transitions 0/515 dead transitions. [2024-06-04 16:16:49,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 515 transitions, 7486 flow [2024-06-04 16:16:49,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:16:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:16:49,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 256 transitions. [2024-06-04 16:16:49,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541125541125541 [2024-06-04 16:16:49,601 INFO L175 Difference]: Start difference. First operand has 350 places, 473 transitions, 5760 flow. Second operand 11 states and 256 transitions. [2024-06-04 16:16:49,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 515 transitions, 7486 flow [2024-06-04 16:16:51,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 515 transitions, 7247 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:51,278 INFO L231 Difference]: Finished difference. Result has 355 places, 479 transitions, 5891 flow [2024-06-04 16:16:51,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5545, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5891, PETRI_PLACES=355, PETRI_TRANSITIONS=479} [2024-06-04 16:16:51,278 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-04 16:16:51,278 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 479 transitions, 5891 flow [2024-06-04 16:16:51,278 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 16:16:51,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:51,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:51,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 16:16:51,279 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 16:16:51,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:51,279 INFO L85 PathProgramCache]: Analyzing trace with hash 738337384, now seen corresponding path program 6 times [2024-06-04 16:16:51,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:51,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694134763] [2024-06-04 16:16:51,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:51,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:51,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:51,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:51,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694134763] [2024-06-04 16:16:51,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694134763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:51,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:51,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:16:51,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033219734] [2024-06-04 16:16:51,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:51,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:16:51,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:51,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:16:51,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:16:51,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:51,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 479 transitions, 5891 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 16:16:51,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:51,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:51,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:52,473 INFO L124 PetriNetUnfolderBase]: 3027/5143 cut-off events. [2024-06-04 16:16:52,473 INFO L125 PetriNetUnfolderBase]: For 439098/439098 co-relation queries the response was YES. [2024-06-04 16:16:52,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35027 conditions, 5143 events. 3027/5143 cut-off events. For 439098/439098 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 34746 event pairs, 590 based on Foata normal form. 1/5136 useless extension candidates. Maximal degree in co-relation 34861. Up to 4343 conditions per place. [2024-06-04 16:16:52,551 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 368 selfloop transitions, 139 changer transitions 0/514 dead transitions. [2024-06-04 16:16:52,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 514 transitions, 7743 flow [2024-06-04 16:16:52,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:16:52,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:16:52,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-04 16:16:52,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 16:16:52,553 INFO L175 Difference]: Start difference. First operand has 355 places, 479 transitions, 5891 flow. Second operand 9 states and 222 transitions. [2024-06-04 16:16:52,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 514 transitions, 7743 flow [2024-06-04 16:16:54,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 514 transitions, 7477 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 16:16:54,276 INFO L231 Difference]: Finished difference. Result has 357 places, 479 transitions, 5909 flow [2024-06-04 16:16:54,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5625, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5909, PETRI_PLACES=357, PETRI_TRANSITIONS=479} [2024-06-04 16:16:54,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-04 16:16:54,276 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 479 transitions, 5909 flow [2024-06-04 16:16:54,277 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 16:16:54,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:54,277 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 16:16:54,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 16:16:54,277 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 16:16:54,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:54,277 INFO L85 PathProgramCache]: Analyzing trace with hash 424642990, now seen corresponding path program 4 times [2024-06-04 16:16:54,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:54,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934550326] [2024-06-04 16:16:54,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:54,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:54,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:54,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934550326] [2024-06-04 16:16:54,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934550326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:54,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:54,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:16:54,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356019467] [2024-06-04 16:16:54,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:54,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:16:54,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:54,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:16:54,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:16:54,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:54,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 479 transitions, 5909 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 16:16:54,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:54,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:54,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:55,557 INFO L124 PetriNetUnfolderBase]: 3037/5165 cut-off events. [2024-06-04 16:16:55,557 INFO L125 PetriNetUnfolderBase]: For 447929/447929 co-relation queries the response was YES. [2024-06-04 16:16:55,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35209 conditions, 5165 events. 3037/5165 cut-off events. For 447929/447929 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 34937 event pairs, 583 based on Foata normal form. 1/5159 useless extension candidates. Maximal degree in co-relation 35042. Up to 4416 conditions per place. [2024-06-04 16:16:55,626 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 367 selfloop transitions, 142 changer transitions 0/516 dead transitions. [2024-06-04 16:16:55,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 516 transitions, 7644 flow [2024-06-04 16:16:55,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:16:55,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:16:55,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-04 16:16:55,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-04 16:16:55,628 INFO L175 Difference]: Start difference. First operand has 357 places, 479 transitions, 5909 flow. Second operand 9 states and 217 transitions. [2024-06-04 16:16:55,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 516 transitions, 7644 flow [2024-06-04 16:16:57,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 516 transitions, 7350 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 16:16:57,293 INFO L231 Difference]: Finished difference. Result has 359 places, 485 transitions, 5982 flow [2024-06-04 16:16:57,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5621, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5982, PETRI_PLACES=359, PETRI_TRANSITIONS=485} [2024-06-04 16:16:57,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-04 16:16:57,293 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 485 transitions, 5982 flow [2024-06-04 16:16:57,294 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 16:16:57,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:57,294 INFO L208 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 16:16:57,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 16:16:57,294 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 16:16:57,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:57,294 INFO L85 PathProgramCache]: Analyzing trace with hash 424642804, now seen corresponding path program 7 times [2024-06-04 16:16:57,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:57,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939143196] [2024-06-04 16:16:57,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:57,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:57,544 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 16:16:57,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:57,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939143196] [2024-06-04 16:16:57,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939143196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:57,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:57,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:16:57,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625780028] [2024-06-04 16:16:57,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:57,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:16:57,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:57,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:16:57,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:16:57,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:57,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 485 transitions, 5982 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 16:16:57,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:57,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:57,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:58,528 INFO L124 PetriNetUnfolderBase]: 3042/5175 cut-off events. [2024-06-04 16:16:58,528 INFO L125 PetriNetUnfolderBase]: For 456335/456335 co-relation queries the response was YES. [2024-06-04 16:16:58,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35324 conditions, 5175 events. 3042/5175 cut-off events. For 456335/456335 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 35062 event pairs, 574 based on Foata normal form. 1/5169 useless extension candidates. Maximal degree in co-relation 35155. Up to 4561 conditions per place. [2024-06-04 16:16:58,615 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 439 selfloop transitions, 70 changer transitions 0/516 dead transitions. [2024-06-04 16:16:58,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 516 transitions, 7093 flow [2024-06-04 16:16:58,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:16:58,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:16:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-04 16:16:58,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5529100529100529 [2024-06-04 16:16:58,616 INFO L175 Difference]: Start difference. First operand has 359 places, 485 transitions, 5982 flow. Second operand 9 states and 209 transitions. [2024-06-04 16:16:58,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 516 transitions, 7093 flow [2024-06-04 16:17:00,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 516 transitions, 6791 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 16:17:00,569 INFO L231 Difference]: Finished difference. Result has 362 places, 488 transitions, 5855 flow [2024-06-04 16:17:00,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5680, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5855, PETRI_PLACES=362, PETRI_TRANSITIONS=488} [2024-06-04 16:17:00,570 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-04 16:17:00,570 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 488 transitions, 5855 flow [2024-06-04 16:17:00,570 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 16:17:00,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:00,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:00,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 16:17:00,571 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 16:17:00,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:00,571 INFO L85 PathProgramCache]: Analyzing trace with hash 749770060, now seen corresponding path program 5 times [2024-06-04 16:17:00,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:00,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234805270] [2024-06-04 16:17:00,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:00,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:00,815 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 16:17:00,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:00,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234805270] [2024-06-04 16:17:00,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234805270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:00,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:00,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:17:00,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868029598] [2024-06-04 16:17:00,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:00,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:17:00,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:00,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:17:00,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:17:00,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:00,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 488 transitions, 5855 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 16:17:00,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:00,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:00,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:01,818 INFO L124 PetriNetUnfolderBase]: 3060/5205 cut-off events. [2024-06-04 16:17:01,818 INFO L125 PetriNetUnfolderBase]: For 469505/469505 co-relation queries the response was YES. [2024-06-04 16:17:01,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35476 conditions, 5205 events. 3060/5205 cut-off events. For 469505/469505 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 35263 event pairs, 583 based on Foata normal form. 1/5199 useless extension candidates. Maximal degree in co-relation 35306. Up to 4442 conditions per place. [2024-06-04 16:17:01,894 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 365 selfloop transitions, 155 changer transitions 0/527 dead transitions. [2024-06-04 16:17:01,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 527 transitions, 7652 flow [2024-06-04 16:17:01,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:17:01,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:17:01,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-04 16:17:01,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5411255411255411 [2024-06-04 16:17:01,895 INFO L175 Difference]: Start difference. First operand has 362 places, 488 transitions, 5855 flow. Second operand 11 states and 250 transitions. [2024-06-04 16:17:01,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 527 transitions, 7652 flow [2024-06-04 16:17:03,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 527 transitions, 7492 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 16:17:03,889 INFO L231 Difference]: Finished difference. Result has 366 places, 497 transitions, 6128 flow [2024-06-04 16:17:03,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5703, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6128, PETRI_PLACES=366, PETRI_TRANSITIONS=497} [2024-06-04 16:17:03,890 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-04 16:17:03,890 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 497 transitions, 6128 flow [2024-06-04 16:17:03,890 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 16:17:03,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:03,890 INFO L208 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 16:17:03,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 16:17:03,891 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 16:17:03,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:03,891 INFO L85 PathProgramCache]: Analyzing trace with hash 749591314, now seen corresponding path program 8 times [2024-06-04 16:17:03,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:03,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335890633] [2024-06-04 16:17:03,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:03,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:04,144 INFO 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 16:17:04,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:04,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335890633] [2024-06-04 16:17:04,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335890633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:04,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:04,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:17:04,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159644976] [2024-06-04 16:17:04,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:04,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:17:04,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:04,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:17:04,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:17:04,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:04,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 497 transitions, 6128 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 16:17:04,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:04,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:04,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:05,273 INFO L124 PetriNetUnfolderBase]: 3073/5228 cut-off events. [2024-06-04 16:17:05,273 INFO L125 PetriNetUnfolderBase]: For 483654/483654 co-relation queries the response was YES. [2024-06-04 16:17:05,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35982 conditions, 5228 events. 3073/5228 cut-off events. For 483654/483654 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35427 event pairs, 574 based on Foata normal form. 1/5222 useless extension candidates. Maximal degree in co-relation 35811. Up to 4587 conditions per place. [2024-06-04 16:17:05,338 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 435 selfloop transitions, 88 changer transitions 0/530 dead transitions. [2024-06-04 16:17:05,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 530 transitions, 7488 flow [2024-06-04 16:17:05,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:17:05,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:17:05,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-04 16:17:05,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404761904761904 [2024-06-04 16:17:05,339 INFO L175 Difference]: Start difference. First operand has 366 places, 497 transitions, 6128 flow. Second operand 10 states and 227 transitions. [2024-06-04 16:17:05,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 530 transitions, 7488 flow [2024-06-04 16:17:06,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 530 transitions, 7219 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-04 16:17:06,805 INFO L231 Difference]: Finished difference. Result has 371 places, 503 transitions, 6122 flow [2024-06-04 16:17:06,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5859, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6122, PETRI_PLACES=371, PETRI_TRANSITIONS=503} [2024-06-04 16:17:06,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-04 16:17:06,806 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 503 transitions, 6122 flow [2024-06-04 16:17:06,806 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 16:17:06,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:06,806 INFO L208 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 16:17:06,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 16:17:06,806 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 16:17:06,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:06,807 INFO L85 PathProgramCache]: Analyzing trace with hash 749384110, now seen corresponding path program 6 times [2024-06-04 16:17:06,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:06,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894108267] [2024-06-04 16:17:06,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:06,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:07,062 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 16:17:07,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:07,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894108267] [2024-06-04 16:17:07,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894108267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:07,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:07,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:17:07,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913101993] [2024-06-04 16:17:07,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:07,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:17:07,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:07,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:17:07,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:17:07,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:07,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 503 transitions, 6122 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 16:17:07,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:07,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:07,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:08,053 INFO L124 PetriNetUnfolderBase]: 3070/5223 cut-off events. [2024-06-04 16:17:08,053 INFO L125 PetriNetUnfolderBase]: For 487804/487804 co-relation queries the response was YES. [2024-06-04 16:17:08,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35853 conditions, 5223 events. 3070/5223 cut-off events. For 487804/487804 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35398 event pairs, 583 based on Foata normal form. 1/5217 useless extension candidates. Maximal degree in co-relation 35680. Up to 4457 conditions per place. [2024-06-04 16:17:08,141 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 372 selfloop transitions, 152 changer transitions 0/531 dead transitions. [2024-06-04 16:17:08,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 531 transitions, 7634 flow [2024-06-04 16:17:08,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:17:08,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:17:08,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-04 16:17:08,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547619047619048 [2024-06-04 16:17:08,142 INFO L175 Difference]: Start difference. First operand has 371 places, 503 transitions, 6122 flow. Second operand 10 states and 233 transitions. [2024-06-04 16:17:08,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 531 transitions, 7634 flow [2024-06-04 16:17:09,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 531 transitions, 7469 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-04 16:17:09,904 INFO L231 Difference]: Finished difference. Result has 374 places, 503 transitions, 6267 flow [2024-06-04 16:17:09,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5957, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6267, PETRI_PLACES=374, PETRI_TRANSITIONS=503} [2024-06-04 16:17:09,906 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-04 16:17:09,906 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 503 transitions, 6267 flow [2024-06-04 16:17:09,906 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 16:17:09,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:09,906 INFO L208 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 16:17:09,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 16:17:09,906 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 16:17:09,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:09,907 INFO L85 PathProgramCache]: Analyzing trace with hash 749383924, now seen corresponding path program 9 times [2024-06-04 16:17:09,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:09,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616437762] [2024-06-04 16:17:09,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:09,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:10,160 INFO 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 16:17:10,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:10,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616437762] [2024-06-04 16:17:10,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616437762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:10,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:10,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:17:10,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674578663] [2024-06-04 16:17:10,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:10,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:17:10,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:10,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:17:10,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:17:10,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:10,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 503 transitions, 6267 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 16:17:10,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:10,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:10,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:11,256 INFO L124 PetriNetUnfolderBase]: 3067/5220 cut-off events. [2024-06-04 16:17:11,256 INFO L125 PetriNetUnfolderBase]: For 492564/492564 co-relation queries the response was YES. [2024-06-04 16:17:11,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35995 conditions, 5220 events. 3067/5220 cut-off events. For 492564/492564 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35470 event pairs, 574 based on Foata normal form. 1/5214 useless extension candidates. Maximal degree in co-relation 35822. Up to 4580 conditions per place. [2024-06-04 16:17:11,333 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 436 selfloop transitions, 88 changer transitions 0/531 dead transitions. [2024-06-04 16:17:11,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 531 transitions, 7383 flow [2024-06-04 16:17:11,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:17:11,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:17:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-06-04 16:17:11,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198412698412699 [2024-06-04 16:17:11,334 INFO L175 Difference]: Start difference. First operand has 374 places, 503 transitions, 6267 flow. Second operand 12 states and 262 transitions. [2024-06-04 16:17:11,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 531 transitions, 7383 flow [2024-06-04 16:17:13,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 531 transitions, 7075 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 16:17:13,181 INFO L231 Difference]: Finished difference. Result has 378 places, 503 transitions, 6141 flow [2024-06-04 16:17:13,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5959, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6141, PETRI_PLACES=378, PETRI_TRANSITIONS=503} [2024-06-04 16:17:13,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-04 16:17:13,182 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 503 transitions, 6141 flow [2024-06-04 16:17:13,182 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 16:17:13,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:13,182 INFO L208 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 16:17:13,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 16:17:13,182 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 16:17:13,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:13,183 INFO L85 PathProgramCache]: Analyzing trace with hash -61539774, now seen corresponding path program 7 times [2024-06-04 16:17:13,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:13,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827745135] [2024-06-04 16:17:13,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:13,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:13,434 INFO 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 16:17:13,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:13,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827745135] [2024-06-04 16:17:13,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827745135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:13,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:13,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:17:13,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546414833] [2024-06-04 16:17:13,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:13,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:17:13,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:13,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:17:13,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:17:13,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:13,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 503 transitions, 6141 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 16:17:13,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:13,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:13,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:14,488 INFO L124 PetriNetUnfolderBase]: 3080/5253 cut-off events. [2024-06-04 16:17:14,489 INFO L125 PetriNetUnfolderBase]: For 507550/507556 co-relation queries the response was YES. [2024-06-04 16:17:14,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36131 conditions, 5253 events. 3080/5253 cut-off events. For 507550/507556 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 35696 event pairs, 579 based on Foata normal form. 5/5253 useless extension candidates. Maximal degree in co-relation 35957. Up to 4547 conditions per place. [2024-06-04 16:17:14,564 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 416 selfloop transitions, 116 changer transitions 0/539 dead transitions. [2024-06-04 16:17:14,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 539 transitions, 7749 flow [2024-06-04 16:17:14,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:17:14,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:17:14,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 267 transitions. [2024-06-04 16:17:14,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-06-04 16:17:14,565 INFO L175 Difference]: Start difference. First operand has 378 places, 503 transitions, 6141 flow. Second operand 12 states and 267 transitions. [2024-06-04 16:17:14,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 539 transitions, 7749 flow [2024-06-04 16:17:16,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 539 transitions, 7538 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-04 16:17:16,380 INFO L231 Difference]: Finished difference. Result has 379 places, 509 transitions, 6257 flow [2024-06-04 16:17:16,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5930, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6257, PETRI_PLACES=379, PETRI_TRANSITIONS=509} [2024-06-04 16:17:16,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-04 16:17:16,381 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 509 transitions, 6257 flow [2024-06-04 16:17:16,381 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 16:17:16,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:16,381 INFO L208 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 16:17:16,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 16:17:16,382 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 16:17:16,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:16,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1814130350, now seen corresponding path program 8 times [2024-06-04 16:17:16,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:16,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746373791] [2024-06-04 16:17:16,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:16,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:16,630 INFO 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 16:17:16,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:16,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746373791] [2024-06-04 16:17:16,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746373791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:16,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:16,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:17:16,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835444450] [2024-06-04 16:17:16,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:16,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:17:16,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:16,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:17:16,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:17:16,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:16,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 509 transitions, 6257 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 16:17:16,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:16,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:16,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:17,695 INFO L124 PetriNetUnfolderBase]: 3090/5267 cut-off events. [2024-06-04 16:17:17,695 INFO L125 PetriNetUnfolderBase]: For 517219/517225 co-relation queries the response was YES. [2024-06-04 16:17:17,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36433 conditions, 5267 events. 3090/5267 cut-off events. For 517219/517225 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 35864 event pairs, 580 based on Foata normal form. 5/5267 useless extension candidates. Maximal degree in co-relation 36257. Up to 4478 conditions per place. [2024-06-04 16:17:17,776 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 379 selfloop transitions, 162 changer transitions 0/548 dead transitions. [2024-06-04 16:17:17,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 548 transitions, 8114 flow [2024-06-04 16:17:17,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:17:17,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:17:17,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 258 transitions. [2024-06-04 16:17:17,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-04 16:17:17,777 INFO L175 Difference]: Start difference. First operand has 379 places, 509 transitions, 6257 flow. Second operand 11 states and 258 transitions. [2024-06-04 16:17:17,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 548 transitions, 8114 flow [2024-06-04 16:17:20,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 548 transitions, 7863 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-04 16:17:20,015 INFO L231 Difference]: Finished difference. Result has 382 places, 515 transitions, 6430 flow [2024-06-04 16:17:20,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6006, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6430, PETRI_PLACES=382, PETRI_TRANSITIONS=515} [2024-06-04 16:17:20,015 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-04 16:17:20,016 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 515 transitions, 6430 flow [2024-06-04 16:17:20,016 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 16:17:20,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:20,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:20,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 16:17:20,016 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 16:17:20,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:20,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1360568612, now seen corresponding path program 9 times [2024-06-04 16:17:20,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:20,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104480622] [2024-06-04 16:17:20,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:20,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:20,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:20,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104480622] [2024-06-04 16:17:20,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104480622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:20,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:20,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:17:20,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133787121] [2024-06-04 16:17:20,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:20,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:17:20,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:20,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:17:20,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:17:20,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:20,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 515 transitions, 6430 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 16:17:20,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:20,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:20,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:21,514 INFO L124 PetriNetUnfolderBase]: 3095/5274 cut-off events. [2024-06-04 16:17:21,515 INFO L125 PetriNetUnfolderBase]: For 526969/526975 co-relation queries the response was YES. [2024-06-04 16:17:21,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36673 conditions, 5274 events. 3095/5274 cut-off events. For 526969/526975 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 35836 event pairs, 580 based on Foata normal form. 5/5274 useless extension candidates. Maximal degree in co-relation 36495. Up to 4484 conditions per place. [2024-06-04 16:17:21,601 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 377 selfloop transitions, 167 changer transitions 0/551 dead transitions. [2024-06-04 16:17:21,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 551 transitions, 8046 flow [2024-06-04 16:17:21,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:17:21,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:17:21,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 273 transitions. [2024-06-04 16:17:21,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-04 16:17:21,602 INFO L175 Difference]: Start difference. First operand has 382 places, 515 transitions, 6430 flow. Second operand 12 states and 273 transitions. [2024-06-04 16:17:21,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 551 transitions, 8046 flow [2024-06-04 16:17:23,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 551 transitions, 7767 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 16:17:23,713 INFO L231 Difference]: Finished difference. Result has 387 places, 518 transitions, 6527 flow [2024-06-04 16:17:23,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6154, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6527, PETRI_PLACES=387, PETRI_TRANSITIONS=518} [2024-06-04 16:17:23,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-04 16:17:23,713 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 518 transitions, 6527 flow [2024-06-04 16:17:23,713 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 16:17:23,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:23,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:23,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 16:17:23,714 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 16:17:23,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:23,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1442107224, now seen corresponding path program 10 times [2024-06-04 16:17:23,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:23,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727681170] [2024-06-04 16:17:23,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:23,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:23,969 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 16:17:23,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:23,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727681170] [2024-06-04 16:17:23,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727681170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:23,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:23,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:17:23,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114453093] [2024-06-04 16:17:23,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:23,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:17:23,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:23,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:17:23,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:17:24,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:24,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 518 transitions, 6527 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 16:17:24,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:24,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:24,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:25,053 INFO L124 PetriNetUnfolderBase]: 3092/5270 cut-off events. [2024-06-04 16:17:25,054 INFO L125 PetriNetUnfolderBase]: For 531383/531389 co-relation queries the response was YES. [2024-06-04 16:17:25,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36671 conditions, 5270 events. 3092/5270 cut-off events. For 531383/531389 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 35855 event pairs, 580 based on Foata normal form. 5/5270 useless extension candidates. Maximal degree in co-relation 36492. Up to 4481 conditions per place. [2024-06-04 16:17:25,141 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 378 selfloop transitions, 165 changer transitions 0/550 dead transitions. [2024-06-04 16:17:25,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 550 transitions, 8107 flow [2024-06-04 16:17:25,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:17:25,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:17:25,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 257 transitions. [2024-06-04 16:17:25,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5562770562770563 [2024-06-04 16:17:25,142 INFO L175 Difference]: Start difference. First operand has 387 places, 518 transitions, 6527 flow. Second operand 11 states and 257 transitions. [2024-06-04 16:17:25,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 550 transitions, 8107 flow [2024-06-04 16:17:27,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 550 transitions, 7840 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-04 16:17:27,423 INFO L231 Difference]: Finished difference. Result has 389 places, 518 transitions, 6596 flow [2024-06-04 16:17:27,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6260, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6596, PETRI_PLACES=389, PETRI_TRANSITIONS=518} [2024-06-04 16:17:27,424 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-04 16:17:27,424 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 518 transitions, 6596 flow [2024-06-04 16:17:27,424 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 16:17:27,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:27,424 INFO L208 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 16:17:27,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 16:17:27,424 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 16:17:27,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:27,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1731703898, now seen corresponding path program 10 times [2024-06-04 16:17:27,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:27,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437250808] [2024-06-04 16:17:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:27,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:27,686 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 16:17:27,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:27,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437250808] [2024-06-04 16:17:27,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437250808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:27,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:27,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:17:27,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865389845] [2024-06-04 16:17:27,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:27,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:17:27,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:27,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:17:27,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:17:27,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:27,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 518 transitions, 6596 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 16:17:27,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:27,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:27,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:28,798 INFO L124 PetriNetUnfolderBase]: 3105/5292 cut-off events. [2024-06-04 16:17:28,798 INFO L125 PetriNetUnfolderBase]: For 546924/546930 co-relation queries the response was YES. [2024-06-04 16:17:28,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37006 conditions, 5292 events. 3105/5292 cut-off events. For 546924/546930 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 35981 event pairs, 571 based on Foata normal form. 5/5292 useless extension candidates. Maximal degree in co-relation 36826. Up to 4634 conditions per place. [2024-06-04 16:17:28,884 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 465 selfloop transitions, 86 changer transitions 0/558 dead transitions. [2024-06-04 16:17:28,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 558 transitions, 8269 flow [2024-06-04 16:17:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:17:28,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:17:28,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 286 transitions. [2024-06-04 16:17:28,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-04 16:17:28,885 INFO L175 Difference]: Start difference. First operand has 389 places, 518 transitions, 6596 flow. Second operand 13 states and 286 transitions. [2024-06-04 16:17:28,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 558 transitions, 8269 flow [2024-06-04 16:17:31,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 558 transitions, 7856 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-04 16:17:31,454 INFO L231 Difference]: Finished difference. Result has 392 places, 524 transitions, 6447 flow [2024-06-04 16:17:31,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6183, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6447, PETRI_PLACES=392, PETRI_TRANSITIONS=524} [2024-06-04 16:17:31,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-04 16:17:31,454 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 524 transitions, 6447 flow [2024-06-04 16:17:31,454 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 16:17:31,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:31,455 INFO L208 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 16:17:31,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 16:17:31,455 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 16:17:31,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:31,455 INFO L85 PathProgramCache]: Analyzing trace with hash -666530376, now seen corresponding path program 11 times [2024-06-04 16:17:31,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:31,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739253782] [2024-06-04 16:17:31,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:31,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:31,702 INFO 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 16:17:31,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:31,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739253782] [2024-06-04 16:17:31,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739253782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:31,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:31,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:17:31,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042213084] [2024-06-04 16:17:31,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:31,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:17:31,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:31,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:17:31,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:17:31,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:31,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 524 transitions, 6447 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 16:17:31,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:31,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:31,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:32,788 INFO L124 PetriNetUnfolderBase]: 3110/5290 cut-off events. [2024-06-04 16:17:32,789 INFO L125 PetriNetUnfolderBase]: For 555066/555066 co-relation queries the response was YES. [2024-06-04 16:17:32,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36927 conditions, 5290 events. 3110/5290 cut-off events. For 555066/555066 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 36041 event pairs, 574 based on Foata normal form. 1/5284 useless extension candidates. Maximal degree in co-relation 36745. Up to 4484 conditions per place. [2024-06-04 16:17:32,869 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 410 selfloop transitions, 155 changer transitions 0/572 dead transitions. [2024-06-04 16:17:32,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 572 transitions, 8365 flow [2024-06-04 16:17:32,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:17:32,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:17:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-06-04 16:17:32,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577922077922078 [2024-06-04 16:17:32,871 INFO L175 Difference]: Start difference. First operand has 392 places, 524 transitions, 6447 flow. Second operand 11 states and 267 transitions. [2024-06-04 16:17:32,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 572 transitions, 8365 flow [2024-06-04 16:17:35,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 572 transitions, 8143 flow, removed 23 selfloop flow, removed 11 redundant places. [2024-06-04 16:17:35,278 INFO L231 Difference]: Finished difference. Result has 393 places, 527 transitions, 6642 flow [2024-06-04 16:17:35,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6225, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6642, PETRI_PLACES=393, PETRI_TRANSITIONS=527} [2024-06-04 16:17:35,278 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-04 16:17:35,278 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 527 transitions, 6642 flow [2024-06-04 16:17:35,279 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 16:17:35,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:35,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:35,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-04 16:17:35,279 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 16:17:35,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:35,279 INFO L85 PathProgramCache]: Analyzing trace with hash -2012927748, now seen corresponding path program 11 times [2024-06-04 16:17:35,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:35,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640611619] [2024-06-04 16:17:35,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:35,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:35,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:35,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640611619] [2024-06-04 16:17:35,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640611619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:35,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:35,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:17:35,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490944018] [2024-06-04 16:17:35,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:35,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:17:35,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:35,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:17:35,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:17:35,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:35,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 527 transitions, 6642 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 16:17:35,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:35,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:35,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:36,635 INFO L124 PetriNetUnfolderBase]: 3115/5298 cut-off events. [2024-06-04 16:17:36,635 INFO L125 PetriNetUnfolderBase]: For 565766/565766 co-relation queries the response was YES. [2024-06-04 16:17:36,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37317 conditions, 5298 events. 3115/5298 cut-off events. For 565766/565766 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 36036 event pairs, 583 based on Foata normal form. 1/5292 useless extension candidates. Maximal degree in co-relation 37135. Up to 4512 conditions per place. [2024-06-04 16:17:36,715 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 385 selfloop transitions, 168 changer transitions 0/560 dead transitions. [2024-06-04 16:17:36,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 560 transitions, 8506 flow [2024-06-04 16:17:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:36,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 16:17:36,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-04 16:17:36,716 INFO L175 Difference]: Start difference. First operand has 393 places, 527 transitions, 6642 flow. Second operand 8 states and 199 transitions. [2024-06-04 16:17:36,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 560 transitions, 8506 flow [2024-06-04 16:17:38,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 560 transitions, 8140 flow, removed 19 selfloop flow, removed 12 redundant places. [2024-06-04 16:17:38,909 INFO L231 Difference]: Finished difference. Result has 389 places, 530 transitions, 6686 flow [2024-06-04 16:17:38,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6294, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6686, PETRI_PLACES=389, PETRI_TRANSITIONS=530} [2024-06-04 16:17:38,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-04 16:17:38,910 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 530 transitions, 6686 flow [2024-06-04 16:17:38,910 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 16:17:38,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:38,911 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 16:17:38,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-04 16:17:38,911 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 16:17:38,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:38,911 INFO L85 PathProgramCache]: Analyzing trace with hash -289619670, now seen corresponding path program 12 times [2024-06-04 16:17:38,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:38,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523348426] [2024-06-04 16:17:38,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:38,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:39,135 INFO 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 16:17:39,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:39,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523348426] [2024-06-04 16:17:39,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523348426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:39,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:39,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:17:39,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887754841] [2024-06-04 16:17:39,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:39,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:17:39,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:39,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:17:39,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:17:39,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:39,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 530 transitions, 6686 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 16:17:39,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:39,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:39,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:40,322 INFO L124 PetriNetUnfolderBase]: 3112/5295 cut-off events. [2024-06-04 16:17:40,322 INFO L125 PetriNetUnfolderBase]: For 540561/540561 co-relation queries the response was YES. [2024-06-04 16:17:40,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36977 conditions, 5295 events. 3112/5295 cut-off events. For 540561/540561 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 36027 event pairs, 574 based on Foata normal form. 1/5289 useless extension candidates. Maximal degree in co-relation 36796. Up to 4488 conditions per place. [2024-06-04 16:17:40,398 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 404 selfloop transitions, 155 changer transitions 0/566 dead transitions. [2024-06-04 16:17:40,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 566 transitions, 8314 flow [2024-06-04 16:17:40,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:17:40,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:17:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-04 16:17:40,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 16:17:40,400 INFO L175 Difference]: Start difference. First operand has 389 places, 530 transitions, 6686 flow. Second operand 9 states and 222 transitions. [2024-06-04 16:17:40,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 566 transitions, 8314 flow [2024-06-04 16:17:42,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 566 transitions, 7964 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-04 16:17:42,886 INFO L231 Difference]: Finished difference. Result has 390 places, 530 transitions, 6669 flow [2024-06-04 16:17:42,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6344, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6669, PETRI_PLACES=390, PETRI_TRANSITIONS=530} [2024-06-04 16:17:42,887 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-04 16:17:42,887 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 530 transitions, 6669 flow [2024-06-04 16:17:42,887 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 16:17:42,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:42,887 INFO L208 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 16:17:42,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-04 16:17:42,887 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 16:17:42,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:42,887 INFO L85 PathProgramCache]: Analyzing trace with hash -289440924, now seen corresponding path program 12 times [2024-06-04 16:17:42,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:42,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223123655] [2024-06-04 16:17:42,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:42,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:43,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:43,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223123655] [2024-06-04 16:17:43,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223123655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:43,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:43,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:17:43,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281992578] [2024-06-04 16:17:43,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:43,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:17:43,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:43,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:17:43,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:17:43,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:43,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 530 transitions, 6669 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 16:17:43,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:43,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:43,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:44,208 INFO L124 PetriNetUnfolderBase]: 3125/5316 cut-off events. [2024-06-04 16:17:44,208 INFO L125 PetriNetUnfolderBase]: For 536979/536979 co-relation queries the response was YES. [2024-06-04 16:17:44,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37107 conditions, 5316 events. 3125/5316 cut-off events. For 536979/536979 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 36191 event pairs, 583 based on Foata normal form. 1/5310 useless extension candidates. Maximal degree in co-relation 36928. Up to 4523 conditions per place. [2024-06-04 16:17:44,288 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 376 selfloop transitions, 181 changer transitions 0/564 dead transitions. [2024-06-04 16:17:44,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 564 transitions, 8564 flow [2024-06-04 16:17:44,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:17:44,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:17:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-04 16:17:44,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-04 16:17:44,289 INFO L175 Difference]: Start difference. First operand has 390 places, 530 transitions, 6669 flow. Second operand 9 states and 213 transitions. [2024-06-04 16:17:44,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 564 transitions, 8564 flow [2024-06-04 16:17:46,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 564 transitions, 8234 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-04 16:17:46,419 INFO L231 Difference]: Finished difference. Result has 390 places, 536 transitions, 6812 flow [2024-06-04 16:17:46,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6351, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6812, PETRI_PLACES=390, PETRI_TRANSITIONS=536} [2024-06-04 16:17:46,420 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-04 16:17:46,420 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 536 transitions, 6812 flow [2024-06-04 16:17:46,420 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 16:17:46,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:46,420 INFO L208 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 16:17:46,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-04 16:17:46,420 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 16:17:46,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:46,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1193173496, now seen corresponding path program 1 times [2024-06-04 16:17:46,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:46,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817454728] [2024-06-04 16:17:46,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:46,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:46,696 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 16:17:46,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:46,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817454728] [2024-06-04 16:17:46,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817454728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:46,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:46,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:17:46,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445975507] [2024-06-04 16:17:46,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:46,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:17:46,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:46,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:17:46,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:17:46,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:46,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 536 transitions, 6812 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 16:17:46,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:46,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:46,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:47,864 INFO L124 PetriNetUnfolderBase]: 3260/5545 cut-off events. [2024-06-04 16:17:47,864 INFO L125 PetriNetUnfolderBase]: For 664055/664061 co-relation queries the response was YES. [2024-06-04 16:17:47,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39765 conditions, 5545 events. 3260/5545 cut-off events. For 664055/664061 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 37890 event pairs, 517 based on Foata normal form. 16/5556 useless extension candidates. Maximal degree in co-relation 39586. Up to 4545 conditions per place. [2024-06-04 16:17:47,956 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 459 selfloop transitions, 114 changer transitions 0/580 dead transitions. [2024-06-04 16:17:47,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 580 transitions, 8594 flow [2024-06-04 16:17:47,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:47,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:47,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-04 16:17:47,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-04 16:17:47,958 INFO L175 Difference]: Start difference. First operand has 390 places, 536 transitions, 6812 flow. Second operand 8 states and 202 transitions. [2024-06-04 16:17:47,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 580 transitions, 8594 flow [2024-06-04 16:17:50,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 580 transitions, 8280 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-04 16:17:50,526 INFO L231 Difference]: Finished difference. Result has 393 places, 543 transitions, 6857 flow [2024-06-04 16:17:50,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6502, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6857, PETRI_PLACES=393, PETRI_TRANSITIONS=543} [2024-06-04 16:17:50,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-04 16:17:50,527 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 543 transitions, 6857 flow [2024-06-04 16:17:50,527 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 16:17:50,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:50,527 INFO L208 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 16:17:50,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-04 16:17:50,528 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 16:17:50,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:50,528 INFO L85 PathProgramCache]: Analyzing trace with hash 14286088, now seen corresponding path program 2 times [2024-06-04 16:17:50,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:50,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756080772] [2024-06-04 16:17:50,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:50,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:50,774 INFO 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 16:17:50,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:50,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756080772] [2024-06-04 16:17:50,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756080772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:50,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:50,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:17:50,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13955678] [2024-06-04 16:17:50,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:50,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:17:50,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:50,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:17:50,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:17:50,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:50,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 543 transitions, 6857 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 16:17:50,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:50,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:50,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:52,114 INFO L124 PetriNetUnfolderBase]: 3316/5641 cut-off events. [2024-06-04 16:17:52,114 INFO L125 PetriNetUnfolderBase]: For 688503/688509 co-relation queries the response was YES. [2024-06-04 16:17:52,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40414 conditions, 5641 events. 3316/5641 cut-off events. For 688503/688509 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 38669 event pairs, 627 based on Foata normal form. 20/5656 useless extension candidates. Maximal degree in co-relation 40234. Up to 4756 conditions per place. [2024-06-04 16:17:52,206 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 397 selfloop transitions, 175 changer transitions 0/579 dead transitions. [2024-06-04 16:17:52,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 579 transitions, 8561 flow [2024-06-04 16:17:52,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:17:52,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:17:52,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-04 16:17:52,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-04 16:17:52,207 INFO L175 Difference]: Start difference. First operand has 393 places, 543 transitions, 6857 flow. Second operand 9 states and 219 transitions. [2024-06-04 16:17:52,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 579 transitions, 8561 flow [2024-06-04 16:17:54,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 579 transitions, 8389 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-04 16:17:54,981 INFO L231 Difference]: Finished difference. Result has 399 places, 545 transitions, 7095 flow [2024-06-04 16:17:54,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6689, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7095, PETRI_PLACES=399, PETRI_TRANSITIONS=545} [2024-06-04 16:17:54,982 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-04 16:17:54,982 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 545 transitions, 7095 flow [2024-06-04 16:17:54,982 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 16:17:54,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:54,982 INFO L208 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 16:17:54,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-04 16:17:54,982 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 16:17:54,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:54,983 INFO L85 PathProgramCache]: Analyzing trace with hash -275399680, now seen corresponding path program 3 times [2024-06-04 16:17:54,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:54,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213414191] [2024-06-04 16:17:54,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:54,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:55,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:55,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213414191] [2024-06-04 16:17:55,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213414191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:55,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:55,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:17:55,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746351251] [2024-06-04 16:17:55,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:55,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:17:55,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:55,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:17:55,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:17:55,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:55,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 545 transitions, 7095 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 16:17:55,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:55,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:55,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:56,444 INFO L124 PetriNetUnfolderBase]: 3372/5729 cut-off events. [2024-06-04 16:17:56,444 INFO L125 PetriNetUnfolderBase]: For 680257/680263 co-relation queries the response was YES. [2024-06-04 16:17:56,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41299 conditions, 5729 events. 3372/5729 cut-off events. For 680257/680263 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 39328 event pairs, 623 based on Foata normal form. 16/5740 useless extension candidates. Maximal degree in co-relation 41117. Up to 4784 conditions per place. [2024-06-04 16:17:56,533 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 401 selfloop transitions, 179 changer transitions 0/587 dead transitions. [2024-06-04 16:17:56,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 587 transitions, 8859 flow [2024-06-04 16:17:56,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:17:56,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:17:56,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-04 16:17:56,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 16:17:56,534 INFO L175 Difference]: Start difference. First operand has 399 places, 545 transitions, 7095 flow. Second operand 9 states and 222 transitions. [2024-06-04 16:17:56,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 587 transitions, 8859 flow [2024-06-04 16:17:59,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 587 transitions, 8487 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-04 16:17:59,078 INFO L231 Difference]: Finished difference. Result has 402 places, 550 transitions, 7180 flow [2024-06-04 16:17:59,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6723, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7180, PETRI_PLACES=402, PETRI_TRANSITIONS=550} [2024-06-04 16:17:59,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-04 16:17:59,079 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 550 transitions, 7180 flow [2024-06-04 16:17:59,079 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 16:17:59,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:59,079 INFO L208 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 16:17:59,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-04 16:17:59,079 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 16:17:59,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:59,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1071212250, now seen corresponding path program 4 times [2024-06-04 16:17:59,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:59,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387145743] [2024-06-04 16:17:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:59,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:59,325 INFO 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 16:17:59,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:59,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387145743] [2024-06-04 16:17:59,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387145743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:59,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:59,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:17:59,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144575239] [2024-06-04 16:17:59,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:59,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:17:59,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:59,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:17:59,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:17:59,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:17:59,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 550 transitions, 7180 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 16:17:59,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:59,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:17:59,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:00,677 INFO L124 PetriNetUnfolderBase]: 3428/5817 cut-off events. [2024-06-04 16:18:00,678 INFO L125 PetriNetUnfolderBase]: For 717078/717084 co-relation queries the response was YES. [2024-06-04 16:18:00,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42019 conditions, 5817 events. 3428/5817 cut-off events. For 717078/717084 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 39994 event pairs, 643 based on Foata normal form. 20/5832 useless extension candidates. Maximal degree in co-relation 41835. Up to 4932 conditions per place. [2024-06-04 16:18:00,762 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 404 selfloop transitions, 178 changer transitions 0/589 dead transitions. [2024-06-04 16:18:00,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 589 transitions, 8922 flow [2024-06-04 16:18:00,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:18:00,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:18:00,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 276 transitions. [2024-06-04 16:18:00,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:18:00,764 INFO L175 Difference]: Start difference. First operand has 402 places, 550 transitions, 7180 flow. Second operand 12 states and 276 transitions. [2024-06-04 16:18:00,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 589 transitions, 8922 flow [2024-06-04 16:18:03,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 589 transitions, 8537 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-04 16:18:03,306 INFO L231 Difference]: Finished difference. Result has 408 places, 552 transitions, 7215 flow [2024-06-04 16:18:03,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6795, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7215, PETRI_PLACES=408, PETRI_TRANSITIONS=552} [2024-06-04 16:18:03,306 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-04 16:18:03,306 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 552 transitions, 7215 flow [2024-06-04 16:18:03,306 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 16:18:03,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:03,307 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] [2024-06-04 16:18:03,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-04 16:18:03,307 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 16:18:03,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:03,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1442110200, now seen corresponding path program 5 times [2024-06-04 16:18:03,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:03,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315357305] [2024-06-04 16:18:03,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:03,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:03,563 INFO 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 16:18:03,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:03,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315357305] [2024-06-04 16:18:03,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315357305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:03,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:03,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:18:03,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81764912] [2024-06-04 16:18:03,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:03,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:18:03,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:03,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:18:03,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:18:03,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:03,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 552 transitions, 7215 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 16:18:03,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:03,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:03,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:04,811 INFO L124 PetriNetUnfolderBase]: 3484/5913 cut-off events. [2024-06-04 16:18:04,812 INFO L125 PetriNetUnfolderBase]: For 731073/731079 co-relation queries the response was YES. [2024-06-04 16:18:04,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42674 conditions, 5913 events. 3484/5913 cut-off events. For 731073/731079 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 40769 event pairs, 655 based on Foata normal form. 20/5928 useless extension candidates. Maximal degree in co-relation 42489. Up to 5020 conditions per place. [2024-06-04 16:18:04,903 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 407 selfloop transitions, 176 changer transitions 0/590 dead transitions. [2024-06-04 16:18:04,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 590 transitions, 8965 flow [2024-06-04 16:18:04,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:18:04,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:18:04,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 260 transitions. [2024-06-04 16:18:04,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5627705627705628 [2024-06-04 16:18:04,905 INFO L175 Difference]: Start difference. First operand has 408 places, 552 transitions, 7215 flow. Second operand 11 states and 260 transitions. [2024-06-04 16:18:04,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 590 transitions, 8965 flow [2024-06-04 16:18:08,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 590 transitions, 8579 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-04 16:18:08,197 INFO L231 Difference]: Finished difference. Result has 409 places, 554 transitions, 7249 flow [2024-06-04 16:18:08,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6829, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7249, PETRI_PLACES=409, PETRI_TRANSITIONS=554} [2024-06-04 16:18:08,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-04 16:18:08,198 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 554 transitions, 7249 flow [2024-06-04 16:18:08,198 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 16:18:08,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:08,198 INFO L208 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 16:18:08,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-04 16:18:08,198 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 16:18:08,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:08,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1442436630, now seen corresponding path program 6 times [2024-06-04 16:18:08,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:08,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871816813] [2024-06-04 16:18:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:08,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:08,465 INFO 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 16:18:08,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:08,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871816813] [2024-06-04 16:18:08,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871816813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:08,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:08,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:18:08,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476823247] [2024-06-04 16:18:08,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:08,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:18:08,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:08,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:18:08,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:18:08,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:08,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 554 transitions, 7249 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 16:18:08,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:08,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:08,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:09,718 INFO L124 PetriNetUnfolderBase]: 3540/6001 cut-off events. [2024-06-04 16:18:09,718 INFO L125 PetriNetUnfolderBase]: For 722274/722280 co-relation queries the response was YES. [2024-06-04 16:18:09,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43217 conditions, 6001 events. 3540/6001 cut-off events. For 722274/722280 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 41378 event pairs, 651 based on Foata normal form. 16/6012 useless extension candidates. Maximal degree in co-relation 43031. Up to 4984 conditions per place. [2024-06-04 16:18:09,810 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 409 selfloop transitions, 182 changer transitions 0/598 dead transitions. [2024-06-04 16:18:09,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 598 transitions, 9069 flow [2024-06-04 16:18:09,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:18:09,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:18:09,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 262 transitions. [2024-06-04 16:18:09,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670995670995671 [2024-06-04 16:18:09,812 INFO L175 Difference]: Start difference. First operand has 409 places, 554 transitions, 7249 flow. Second operand 11 states and 262 transitions. [2024-06-04 16:18:09,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 598 transitions, 9069 flow [2024-06-04 16:18:13,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 598 transitions, 8683 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-04 16:18:13,053 INFO L231 Difference]: Finished difference. Result has 412 places, 559 transitions, 7348 flow [2024-06-04 16:18:13,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6863, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7348, PETRI_PLACES=412, PETRI_TRANSITIONS=559} [2024-06-04 16:18:13,053 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-04 16:18:13,053 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 559 transitions, 7348 flow [2024-06-04 16:18:13,054 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 16:18:13,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:13,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:13,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-04 16:18:13,054 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 16:18:13,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:13,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1057867866, now seen corresponding path program 1 times [2024-06-04 16:18:13,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:13,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029437059] [2024-06-04 16:18:13,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:13,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:13,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:13,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029437059] [2024-06-04 16:18:13,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029437059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:13,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:13,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:18:13,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219131771] [2024-06-04 16:18:13,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:13,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:18:13,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:13,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:18:13,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:18:13,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:13,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 559 transitions, 7348 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 16:18:13,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:13,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:13,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:14,715 INFO L124 PetriNetUnfolderBase]: 3580/6073 cut-off events. [2024-06-04 16:18:14,715 INFO L125 PetriNetUnfolderBase]: For 735497/735503 co-relation queries the response was YES. [2024-06-04 16:18:14,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43709 conditions, 6073 events. 3580/6073 cut-off events. For 735497/735503 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 41985 event pairs, 663 based on Foata normal form. 16/6084 useless extension candidates. Maximal degree in co-relation 43521. Up to 4984 conditions per place. [2024-06-04 16:18:14,798 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 407 selfloop transitions, 187 changer transitions 0/601 dead transitions. [2024-06-04 16:18:14,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 601 transitions, 9136 flow [2024-06-04 16:18:14,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:18:14,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:18:14,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 278 transitions. [2024-06-04 16:18:14,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5515873015873016 [2024-06-04 16:18:14,800 INFO L175 Difference]: Start difference. First operand has 412 places, 559 transitions, 7348 flow. Second operand 12 states and 278 transitions. [2024-06-04 16:18:14,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 601 transitions, 9136 flow [2024-06-04 16:18:17,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 601 transitions, 8731 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-04 16:18:17,813 INFO L231 Difference]: Finished difference. Result has 416 places, 561 transitions, 7376 flow [2024-06-04 16:18:17,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6943, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7376, PETRI_PLACES=416, PETRI_TRANSITIONS=561} [2024-06-04 16:18:17,814 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-04 16:18:17,814 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 561 transitions, 7376 flow [2024-06-04 16:18:17,814 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 16:18:17,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:17,814 INFO L208 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 16:18:17,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-04 16:18:17,814 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 16:18:17,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:17,815 INFO L85 PathProgramCache]: Analyzing trace with hash 657589674, now seen corresponding path program 1 times [2024-06-04 16:18:17,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:17,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957386414] [2024-06-04 16:18:17,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:17,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:18,045 INFO 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 16:18:18,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:18,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957386414] [2024-06-04 16:18:18,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957386414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:18,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:18,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:18,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717488559] [2024-06-04 16:18:18,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:18,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:18,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:18,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:18,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:18,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:18,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 561 transitions, 7376 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 16:18:18,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:18,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:18,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:19,294 INFO L124 PetriNetUnfolderBase]: 3588/6083 cut-off events. [2024-06-04 16:18:19,294 INFO L125 PetriNetUnfolderBase]: For 688527/688533 co-relation queries the response was YES. [2024-06-04 16:18:19,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43810 conditions, 6083 events. 3588/6083 cut-off events. For 688527/688533 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 42045 event pairs, 674 based on Foata normal form. 6/6084 useless extension candidates. Maximal degree in co-relation 43621. Up to 5427 conditions per place. [2024-06-04 16:18:19,389 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 508 selfloop transitions, 67 changer transitions 0/582 dead transitions. [2024-06-04 16:18:19,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 582 transitions, 8638 flow [2024-06-04 16:18:19,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:18:19,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:18:19,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-04 16:18:19,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-04 16:18:19,390 INFO L175 Difference]: Start difference. First operand has 416 places, 561 transitions, 7376 flow. Second operand 8 states and 182 transitions. [2024-06-04 16:18:19,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 582 transitions, 8638 flow [2024-06-04 16:18:22,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 582 transitions, 8227 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-04 16:18:22,676 INFO L231 Difference]: Finished difference. Result has 414 places, 563 transitions, 7174 flow [2024-06-04 16:18:22,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6965, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7174, PETRI_PLACES=414, PETRI_TRANSITIONS=563} [2024-06-04 16:18:22,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-04 16:18:22,677 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 563 transitions, 7174 flow [2024-06-04 16:18:22,677 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 16:18:22,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:22,677 INFO L208 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 16:18:22,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-04 16:18:22,677 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 16:18:22,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:22,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1057862906, now seen corresponding path program 2 times [2024-06-04 16:18:22,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:22,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696330808] [2024-06-04 16:18:22,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:22,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:22,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:22,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696330808] [2024-06-04 16:18:22,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696330808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:22,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:22,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:22,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011468477] [2024-06-04 16:18:22,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:22,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:22,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:22,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:22,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:22,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:22,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 563 transitions, 7174 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 16:18:22,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:22,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:22,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:24,107 INFO L124 PetriNetUnfolderBase]: 3596/6091 cut-off events. [2024-06-04 16:18:24,107 INFO L125 PetriNetUnfolderBase]: For 699087/699093 co-relation queries the response was YES. [2024-06-04 16:18:24,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43478 conditions, 6091 events. 3596/6091 cut-off events. For 699087/699093 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 42084 event pairs, 666 based on Foata normal form. 6/6092 useless extension candidates. Maximal degree in co-relation 43288. Up to 5419 conditions per place. [2024-06-04 16:18:24,202 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 507 selfloop transitions, 72 changer transitions 0/586 dead transitions. [2024-06-04 16:18:24,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 586 transitions, 8452 flow [2024-06-04 16:18:24,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:18:24,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:18:24,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-04 16:18:24,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-04 16:18:24,204 INFO L175 Difference]: Start difference. First operand has 414 places, 563 transitions, 7174 flow. Second operand 9 states and 201 transitions. [2024-06-04 16:18:24,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 586 transitions, 8452 flow [2024-06-04 16:18:27,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 586 transitions, 8259 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-04 16:18:27,159 INFO L231 Difference]: Finished difference. Result has 417 places, 565 transitions, 7204 flow [2024-06-04 16:18:27,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6981, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7204, PETRI_PLACES=417, PETRI_TRANSITIONS=565} [2024-06-04 16:18:27,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-04 16:18:27,160 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 565 transitions, 7204 flow [2024-06-04 16:18:27,160 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 16:18:27,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:27,160 INFO L208 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 16:18:27,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-04 16:18:27,161 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 16:18:27,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:27,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2023236468, now seen corresponding path program 13 times [2024-06-04 16:18:27,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:27,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166068244] [2024-06-04 16:18:27,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:27,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:27,386 INFO 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 16:18:27,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:27,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166068244] [2024-06-04 16:18:27,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166068244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:27,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:27,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:18:27,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680225484] [2024-06-04 16:18:27,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:27,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:18:27,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:27,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:18:27,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:18:27,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:27,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 565 transitions, 7204 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 16:18:27,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:27,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:27,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:28,788 INFO L124 PetriNetUnfolderBase]: 3617/6128 cut-off events. [2024-06-04 16:18:28,788 INFO L125 PetriNetUnfolderBase]: For 717513/717519 co-relation queries the response was YES. [2024-06-04 16:18:28,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43964 conditions, 6128 events. 3617/6128 cut-off events. For 717513/717519 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 42371 event pairs, 683 based on Foata normal form. 1/6122 useless extension candidates. Maximal degree in co-relation 43773. Up to 5226 conditions per place. [2024-06-04 16:18:28,872 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 426 selfloop transitions, 174 changer transitions 0/607 dead transitions. [2024-06-04 16:18:28,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 607 transitions, 9258 flow [2024-06-04 16:18:28,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:18:28,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:18:28,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-04 16:18:28,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-04 16:18:28,873 INFO L175 Difference]: Start difference. First operand has 417 places, 565 transitions, 7204 flow. Second operand 8 states and 201 transitions. [2024-06-04 16:18:28,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 607 transitions, 9258 flow [2024-06-04 16:18:31,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 607 transitions, 9051 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-04 16:18:31,896 INFO L231 Difference]: Finished difference. Result has 418 places, 574 transitions, 7457 flow [2024-06-04 16:18:31,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6997, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7457, PETRI_PLACES=418, PETRI_TRANSITIONS=574} [2024-06-04 16:18:31,897 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-04 16:18:31,897 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 574 transitions, 7457 flow [2024-06-04 16:18:31,897 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 16:18:31,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:31,897 INFO L208 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 16:18:31,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-04 16:18:31,898 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 16:18:31,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:31,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2023356438, now seen corresponding path program 14 times [2024-06-04 16:18:31,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:31,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956402020] [2024-06-04 16:18:31,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:31,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:32,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:32,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:32,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956402020] [2024-06-04 16:18:32,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956402020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:32,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:32,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:18:32,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866476282] [2024-06-04 16:18:32,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:32,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:18:32,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:32,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:18:32,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:18:32,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:32,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 574 transitions, 7457 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 16:18:32,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:32,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:32,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:33,510 INFO L124 PetriNetUnfolderBase]: 3614/6126 cut-off events. [2024-06-04 16:18:33,511 INFO L125 PetriNetUnfolderBase]: For 723398/723404 co-relation queries the response was YES. [2024-06-04 16:18:33,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44100 conditions, 6126 events. 3614/6126 cut-off events. For 723398/723404 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 42377 event pairs, 668 based on Foata normal form. 5/6126 useless extension candidates. Maximal degree in co-relation 43908. Up to 5437 conditions per place. [2024-06-04 16:18:33,609 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 518 selfloop transitions, 76 changer transitions 0/601 dead transitions. [2024-06-04 16:18:33,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 601 transitions, 8713 flow [2024-06-04 16:18:33,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:18:33,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:18:33,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 16:18:33,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-04 16:18:33,610 INFO L175 Difference]: Start difference. First operand has 418 places, 574 transitions, 7457 flow. Second operand 8 states and 191 transitions. [2024-06-04 16:18:33,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 601 transitions, 8713 flow [2024-06-04 16:18:37,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 601 transitions, 8331 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-04 16:18:37,015 INFO L231 Difference]: Finished difference. Result has 421 places, 574 transitions, 7233 flow [2024-06-04 16:18:37,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7075, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7233, PETRI_PLACES=421, PETRI_TRANSITIONS=574} [2024-06-04 16:18:37,015 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-04 16:18:37,015 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 574 transitions, 7233 flow [2024-06-04 16:18:37,016 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 16:18:37,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:37,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:37,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-04 16:18:37,016 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 16:18:37,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:37,016 INFO L85 PathProgramCache]: Analyzing trace with hash -2072429038, now seen corresponding path program 15 times [2024-06-04 16:18:37,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:37,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989014271] [2024-06-04 16:18:37,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:37,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:37,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:37,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:37,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989014271] [2024-06-04 16:18:37,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989014271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:37,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:37,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:18:37,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507276958] [2024-06-04 16:18:37,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:37,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:18:37,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:37,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:18:37,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:18:37,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:37,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 574 transitions, 7233 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 16:18:37,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:37,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:37,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:38,583 INFO L124 PetriNetUnfolderBase]: 3635/6157 cut-off events. [2024-06-04 16:18:38,584 INFO L125 PetriNetUnfolderBase]: For 747653/747659 co-relation queries the response was YES. [2024-06-04 16:18:38,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44307 conditions, 6157 events. 3635/6157 cut-off events. For 747653/747659 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 42585 event pairs, 681 based on Foata normal form. 1/6151 useless extension candidates. Maximal degree in co-relation 44114. Up to 5247 conditions per place. [2024-06-04 16:18:38,685 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 431 selfloop transitions, 187 changer transitions 0/625 dead transitions. [2024-06-04 16:18:38,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 625 transitions, 9577 flow [2024-06-04 16:18:38,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:18:38,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:18:38,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-04 16:18:38,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-04 16:18:38,686 INFO L175 Difference]: Start difference. First operand has 421 places, 574 transitions, 7233 flow. Second operand 10 states and 246 transitions. [2024-06-04 16:18:38,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 625 transitions, 9577 flow [2024-06-04 16:18:42,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 625 transitions, 9413 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 16:18:42,833 INFO L231 Difference]: Finished difference. Result has 423 places, 583 transitions, 7549 flow [2024-06-04 16:18:42,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7069, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7549, PETRI_PLACES=423, PETRI_TRANSITIONS=583} [2024-06-04 16:18:42,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-04 16:18:42,834 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 583 transitions, 7549 flow [2024-06-04 16:18:42,834 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 16:18:42,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:42,834 INFO L208 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 16:18:42,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-04 16:18:42,834 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 16:18:42,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:42,835 INFO L85 PathProgramCache]: Analyzing trace with hash -2061953518, now seen corresponding path program 16 times [2024-06-04 16:18:42,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:42,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034399470] [2024-06-04 16:18:42,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:42,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:43,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:43,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034399470] [2024-06-04 16:18:43,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034399470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:43,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:43,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:18:43,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951575110] [2024-06-04 16:18:43,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:43,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:18:43,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:43,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:18:43,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:18:43,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:43,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 583 transitions, 7549 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 16:18:43,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:43,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:43,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:44,477 INFO L124 PetriNetUnfolderBase]: 3632/6153 cut-off events. [2024-06-04 16:18:44,477 INFO L125 PetriNetUnfolderBase]: For 754345/754351 co-relation queries the response was YES. [2024-06-04 16:18:44,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44578 conditions, 6153 events. 3632/6153 cut-off events. For 754345/754351 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 42602 event pairs, 683 based on Foata normal form. 1/6147 useless extension candidates. Maximal degree in co-relation 44384. Up to 5244 conditions per place. [2024-06-04 16:18:44,564 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 426 selfloop transitions, 189 changer transitions 0/622 dead transitions. [2024-06-04 16:18:44,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 622 transitions, 9559 flow [2024-06-04 16:18:44,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:18:44,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:18:44,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-06-04 16:18:44,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-06-04 16:18:44,565 INFO L175 Difference]: Start difference. First operand has 423 places, 583 transitions, 7549 flow. Second operand 11 states and 259 transitions. [2024-06-04 16:18:44,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 622 transitions, 9559 flow [2024-06-04 16:18:48,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 622 transitions, 9151 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-04 16:18:48,338 INFO L231 Difference]: Finished difference. Result has 427 places, 583 transitions, 7525 flow [2024-06-04 16:18:48,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7141, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7525, PETRI_PLACES=427, PETRI_TRANSITIONS=583} [2024-06-04 16:18:48,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-04 16:18:48,339 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 583 transitions, 7525 flow [2024-06-04 16:18:48,339 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 16:18:48,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:48,339 INFO L208 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 16:18:48,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-04 16:18:48,340 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 16:18:48,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:48,340 INFO L85 PathProgramCache]: Analyzing trace with hash 410945750, now seen corresponding path program 17 times [2024-06-04 16:18:48,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:48,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106335728] [2024-06-04 16:18:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:48,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:48,565 INFO 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 16:18:48,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:48,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106335728] [2024-06-04 16:18:48,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106335728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:48,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:48,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:18:48,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477104718] [2024-06-04 16:18:48,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:48,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:18:48,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:48,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:18:48,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:18:48,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:48,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 583 transitions, 7525 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 16:18:48,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:48,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:48,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:49,825 INFO L124 PetriNetUnfolderBase]: 3637/6158 cut-off events. [2024-06-04 16:18:49,826 INFO L125 PetriNetUnfolderBase]: For 767418/767424 co-relation queries the response was YES. [2024-06-04 16:18:49,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44706 conditions, 6158 events. 3637/6158 cut-off events. For 767418/767424 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42642 event pairs, 682 based on Foata normal form. 5/6155 useless extension candidates. Maximal degree in co-relation 44511. Up to 5250 conditions per place. [2024-06-04 16:18:49,923 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 421 selfloop transitions, 191 changer transitions 0/619 dead transitions. [2024-06-04 16:18:49,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 619 transitions, 9331 flow [2024-06-04 16:18:49,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:18:49,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:18:49,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-04 16:18:49,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-04 16:18:49,924 INFO L175 Difference]: Start difference. First operand has 427 places, 583 transitions, 7525 flow. Second operand 9 states and 215 transitions. [2024-06-04 16:18:49,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 619 transitions, 9331 flow [2024-06-04 16:18:53,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 619 transitions, 8966 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-04 16:18:53,238 INFO L231 Difference]: Finished difference. Result has 428 places, 586 transitions, 7588 flow [2024-06-04 16:18:53,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7166, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7588, PETRI_PLACES=428, PETRI_TRANSITIONS=586} [2024-06-04 16:18:53,239 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-04 16:18:53,239 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 586 transitions, 7588 flow [2024-06-04 16:18:53,239 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 16:18:53,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:53,239 INFO L208 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 16:18:53,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-04 16:18:53,240 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 16:18:53,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:53,240 INFO L85 PathProgramCache]: Analyzing trace with hash -365294612, now seen corresponding path program 18 times [2024-06-04 16:18:53,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:53,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146073403] [2024-06-04 16:18:53,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:53,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:53,478 INFO 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 16:18:53,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:53,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146073403] [2024-06-04 16:18:53,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146073403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:53,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:53,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:18:53,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258254980] [2024-06-04 16:18:53,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:53,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:18:53,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:53,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:18:53,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:18:53,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:53,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 586 transitions, 7588 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 16:18:53,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:53,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:53,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:54,763 INFO L124 PetriNetUnfolderBase]: 3634/6160 cut-off events. [2024-06-04 16:18:54,763 INFO L125 PetriNetUnfolderBase]: For 772678/772684 co-relation queries the response was YES. [2024-06-04 16:18:54,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44700 conditions, 6160 events. 3634/6160 cut-off events. For 772678/772684 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42682 event pairs, 668 based on Foata normal form. 5/6160 useless extension candidates. Maximal degree in co-relation 44504. Up to 5455 conditions per place. [2024-06-04 16:18:54,859 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 525 selfloop transitions, 86 changer transitions 0/618 dead transitions. [2024-06-04 16:18:54,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 618 transitions, 9120 flow [2024-06-04 16:18:54,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:18:54,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:18:54,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 267 transitions. [2024-06-04 16:18:54,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-06-04 16:18:54,860 INFO L175 Difference]: Start difference. First operand has 428 places, 586 transitions, 7588 flow. Second operand 12 states and 267 transitions. [2024-06-04 16:18:54,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 618 transitions, 9120 flow [2024-06-04 16:18:58,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 618 transitions, 8691 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 16:18:58,507 INFO L231 Difference]: Finished difference. Result has 433 places, 586 transitions, 7337 flow [2024-06-04 16:18:58,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7159, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7337, PETRI_PLACES=433, PETRI_TRANSITIONS=586} [2024-06-04 16:18:58,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-04 16:18:58,508 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 586 transitions, 7337 flow [2024-06-04 16:18:58,508 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 16:18:58,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:58,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:58,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-04 16:18:58,509 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 16:18:58,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:58,509 INFO L85 PathProgramCache]: Analyzing trace with hash -209721332, now seen corresponding path program 19 times [2024-06-04 16:18:58,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:58,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231148579] [2024-06-04 16:18:58,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:58,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:58,750 INFO 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 16:18:58,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:58,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231148579] [2024-06-04 16:18:58,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231148579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:58,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:58,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:18:58,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764049320] [2024-06-04 16:18:58,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:58,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:18:58,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:58,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:18:58,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:18:58,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:18:58,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 586 transitions, 7337 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 16:18:58,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:58,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:18:58,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:00,153 INFO L124 PetriNetUnfolderBase]: 3639/6163 cut-off events. [2024-06-04 16:19:00,153 INFO L125 PetriNetUnfolderBase]: For 784970/784976 co-relation queries the response was YES. [2024-06-04 16:19:00,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44509 conditions, 6163 events. 3639/6163 cut-off events. For 784970/784976 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42774 event pairs, 682 based on Foata normal form. 5/6160 useless extension candidates. Maximal degree in co-relation 44312. Up to 5253 conditions per place. [2024-06-04 16:19:00,259 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 422 selfloop transitions, 195 changer transitions 0/624 dead transitions. [2024-06-04 16:19:00,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 624 transitions, 9151 flow [2024-06-04 16:19:00,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:19:00,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:19:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 251 transitions. [2024-06-04 16:19:00,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432900432900433 [2024-06-04 16:19:00,261 INFO L175 Difference]: Start difference. First operand has 433 places, 586 transitions, 7337 flow. Second operand 11 states and 251 transitions. [2024-06-04 16:19:00,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 624 transitions, 9151 flow [2024-06-04 16:19:03,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 624 transitions, 8975 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-04 16:19:03,113 INFO L231 Difference]: Finished difference. Result has 434 places, 589 transitions, 7583 flow [2024-06-04 16:19:03,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7161, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7583, PETRI_PLACES=434, PETRI_TRANSITIONS=589} [2024-06-04 16:19:03,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-04 16:19:03,113 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 589 transitions, 7583 flow [2024-06-04 16:19:03,113 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 16:19:03,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:03,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:03,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-04 16:19:03,114 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 16:19:03,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:03,114 INFO L85 PathProgramCache]: Analyzing trace with hash -291835144, now seen corresponding path program 20 times [2024-06-04 16:19:03,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:03,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835790954] [2024-06-04 16:19:03,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:03,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:03,359 INFO 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 16:19:03,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:03,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835790954] [2024-06-04 16:19:03,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835790954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:03,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:03,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:19:03,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743179939] [2024-06-04 16:19:03,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:03,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:19:03,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:03,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:19:03,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:19:03,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:03,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 589 transitions, 7583 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 16:19:03,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:03,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:03,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:04,655 INFO L124 PetriNetUnfolderBase]: 3636/6165 cut-off events. [2024-06-04 16:19:04,655 INFO L125 PetriNetUnfolderBase]: For 790887/790893 co-relation queries the response was YES. [2024-06-04 16:19:04,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44773 conditions, 6165 events. 3636/6165 cut-off events. For 790887/790893 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42732 event pairs, 666 based on Foata normal form. 5/6165 useless extension candidates. Maximal degree in co-relation 44575. Up to 5459 conditions per place. [2024-06-04 16:19:04,757 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 525 selfloop transitions, 86 changer transitions 0/618 dead transitions. [2024-06-04 16:19:04,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 618 transitions, 8877 flow [2024-06-04 16:19:04,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:19:04,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:19:04,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-04 16:19:04,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452380952380952 [2024-06-04 16:19:04,758 INFO L175 Difference]: Start difference. First operand has 434 places, 589 transitions, 7583 flow. Second operand 10 states and 229 transitions. [2024-06-04 16:19:04,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 618 transitions, 8877 flow [2024-06-04 16:19:08,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 618 transitions, 8469 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-04 16:19:08,455 INFO L231 Difference]: Finished difference. Result has 435 places, 589 transitions, 7353 flow [2024-06-04 16:19:08,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7175, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7353, PETRI_PLACES=435, PETRI_TRANSITIONS=589} [2024-06-04 16:19:08,456 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-04 16:19:08,456 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 589 transitions, 7353 flow [2024-06-04 16:19:08,456 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 16:19:08,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:08,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:08,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-04 16:19:08,457 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 16:19:08,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:08,457 INFO L85 PathProgramCache]: Analyzing trace with hash 144541708, now seen corresponding path program 21 times [2024-06-04 16:19:08,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:08,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965791850] [2024-06-04 16:19:08,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:08,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:08,686 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 16:19:08,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:08,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965791850] [2024-06-04 16:19:08,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965791850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:08,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:08,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:19:08,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274365237] [2024-06-04 16:19:08,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:08,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:19:08,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:08,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:19:08,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:19:08,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:08,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 589 transitions, 7353 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 16:19:08,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:08,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:08,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:10,022 INFO L124 PetriNetUnfolderBase]: 3633/6155 cut-off events. [2024-06-04 16:19:10,023 INFO L125 PetriNetUnfolderBase]: For 796130/796136 co-relation queries the response was YES. [2024-06-04 16:19:10,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44437 conditions, 6155 events. 3633/6155 cut-off events. For 796130/796136 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 42699 event pairs, 684 based on Foata normal form. 5/6152 useless extension candidates. Maximal degree in co-relation 44238. Up to 5247 conditions per place. [2024-06-04 16:19:10,137 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 410 selfloop transitions, 199 changer transitions 0/616 dead transitions. [2024-06-04 16:19:10,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 616 transitions, 8875 flow [2024-06-04 16:19:10,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:19:10,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:19:10,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-04 16:19:10,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-04 16:19:10,139 INFO L175 Difference]: Start difference. First operand has 435 places, 589 transitions, 7353 flow. Second operand 10 states and 225 transitions. [2024-06-04 16:19:10,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 616 transitions, 8875 flow [2024-06-04 16:19:12,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 616 transitions, 8703 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-04 16:19:12,889 INFO L231 Difference]: Finished difference. Result has 436 places, 589 transitions, 7585 flow [2024-06-04 16:19:12,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7181, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7585, PETRI_PLACES=436, PETRI_TRANSITIONS=589} [2024-06-04 16:19:12,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-04 16:19:12,889 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 589 transitions, 7585 flow [2024-06-04 16:19:12,889 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 16:19:12,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:12,890 INFO L208 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 16:19:12,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-04 16:19:12,890 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 16:19:12,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:12,890 INFO L85 PathProgramCache]: Analyzing trace with hash 56670884, now seen corresponding path program 13 times [2024-06-04 16:19:12,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:12,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927602644] [2024-06-04 16:19:12,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:12,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:13,168 INFO 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 16:19:13,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:13,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927602644] [2024-06-04 16:19:13,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927602644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:13,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:13,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:19:13,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084895898] [2024-06-04 16:19:13,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:13,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:19:13,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:13,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:19:13,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:19:13,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:13,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 589 transitions, 7585 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 16:19:13,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:13,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:13,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:14,512 INFO L124 PetriNetUnfolderBase]: 3638/6159 cut-off events. [2024-06-04 16:19:14,513 INFO L125 PetriNetUnfolderBase]: For 808175/808175 co-relation queries the response was YES. [2024-06-04 16:19:14,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44884 conditions, 6159 events. 3638/6159 cut-off events. For 808175/808175 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42695 event pairs, 677 based on Foata normal form. 1/6153 useless extension candidates. Maximal degree in co-relation 44684. Up to 5455 conditions per place. [2024-06-04 16:19:14,623 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 504 selfloop transitions, 103 changer transitions 0/614 dead transitions. [2024-06-04 16:19:14,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 614 transitions, 9129 flow [2024-06-04 16:19:14,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:19:14,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:19:14,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-04 16:19:14,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173160173160173 [2024-06-04 16:19:14,625 INFO L175 Difference]: Start difference. First operand has 436 places, 589 transitions, 7585 flow. Second operand 11 states and 239 transitions. [2024-06-04 16:19:14,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 614 transitions, 9129 flow [2024-06-04 16:19:17,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 614 transitions, 8756 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-04 16:19:17,557 INFO L231 Difference]: Finished difference. Result has 439 places, 592 transitions, 7468 flow [2024-06-04 16:19:17,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7212, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7468, PETRI_PLACES=439, PETRI_TRANSITIONS=592} [2024-06-04 16:19:17,557 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-04 16:19:17,557 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 592 transitions, 7468 flow [2024-06-04 16:19:17,558 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 16:19:17,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:17,558 INFO L208 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 16:19:17,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-04 16:19:17,558 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 16:19:17,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:17,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1016739006, now seen corresponding path program 22 times [2024-06-04 16:19:17,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:17,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466937031] [2024-06-04 16:19:17,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:17,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:17,816 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 16:19:17,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:17,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466937031] [2024-06-04 16:19:17,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466937031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:17,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:17,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:19:17,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152846014] [2024-06-04 16:19:17,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:17,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:19:17,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:17,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:19:17,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:19:17,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:17,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 592 transitions, 7468 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 16:19:17,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:17,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:17,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:19,231 INFO L124 PetriNetUnfolderBase]: 3635/6166 cut-off events. [2024-06-04 16:19:19,231 INFO L125 PetriNetUnfolderBase]: For 813871/813877 co-relation queries the response was YES. [2024-06-04 16:19:19,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44541 conditions, 6166 events. 3635/6166 cut-off events. For 813871/813877 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42774 event pairs, 666 based on Foata normal form. 5/6166 useless extension candidates. Maximal degree in co-relation 44341. Up to 5296 conditions per place. [2024-06-04 16:19:19,323 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 465 selfloop transitions, 164 changer transitions 0/636 dead transitions. [2024-06-04 16:19:19,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 636 transitions, 9562 flow [2024-06-04 16:19:19,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:19:19,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:19:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2024-06-04 16:19:19,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-04 16:19:19,325 INFO L175 Difference]: Start difference. First operand has 439 places, 592 transitions, 7468 flow. Second operand 10 states and 249 transitions. [2024-06-04 16:19:19,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 636 transitions, 9562 flow [2024-06-04 16:19:22,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 636 transitions, 9256 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-04 16:19:22,850 INFO L231 Difference]: Finished difference. Result has 439 places, 592 transitions, 7505 flow [2024-06-04 16:19:22,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7162, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7505, PETRI_PLACES=439, PETRI_TRANSITIONS=592} [2024-06-04 16:19:22,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-04 16:19:22,850 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 592 transitions, 7505 flow [2024-06-04 16:19:22,850 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 16:19:22,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:22,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:22,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-04 16:19:22,851 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 16:19:22,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:22,851 INFO L85 PathProgramCache]: Analyzing trace with hash -115104022, now seen corresponding path program 23 times [2024-06-04 16:19:22,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:22,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000327708] [2024-06-04 16:19:22,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:22,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:23,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:23,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000327708] [2024-06-04 16:19:23,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000327708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:23,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:23,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:19:23,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958645481] [2024-06-04 16:19:23,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:23,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:19:23,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:23,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:19:23,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:19:23,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:23,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 592 transitions, 7505 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 16:19:23,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:23,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:23,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:24,364 INFO L124 PetriNetUnfolderBase]: 3632/6156 cut-off events. [2024-06-04 16:19:24,364 INFO L125 PetriNetUnfolderBase]: For 820388/820394 co-relation queries the response was YES. [2024-06-04 16:19:24,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44667 conditions, 6156 events. 3632/6156 cut-off events. For 820388/820394 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 42726 event pairs, 682 based on Foata normal form. 5/6153 useless extension candidates. Maximal degree in co-relation 44466. Up to 5293 conditions per place. [2024-06-04 16:19:24,463 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 461 selfloop transitions, 151 changer transitions 0/619 dead transitions. [2024-06-04 16:19:24,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 619 transitions, 9041 flow [2024-06-04 16:19:24,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:19:24,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:19:24,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-04 16:19:24,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 16:19:24,465 INFO L175 Difference]: Start difference. First operand has 439 places, 592 transitions, 7505 flow. Second operand 7 states and 175 transitions. [2024-06-04 16:19:24,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 619 transitions, 9041 flow [2024-06-04 16:19:28,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 619 transitions, 8623 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-04 16:19:28,332 INFO L231 Difference]: Finished difference. Result has 434 places, 592 transitions, 7404 flow [2024-06-04 16:19:28,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7091, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7404, PETRI_PLACES=434, PETRI_TRANSITIONS=592} [2024-06-04 16:19:28,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-04 16:19:28,333 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 592 transitions, 7404 flow [2024-06-04 16:19:28,333 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 16:19:28,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:28,333 INFO L208 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 16:19:28,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-04 16:19:28,333 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 16:19:28,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:28,334 INFO L85 PathProgramCache]: Analyzing trace with hash -371811922, now seen corresponding path program 24 times [2024-06-04 16:19:28,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:28,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826766241] [2024-06-04 16:19:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:28,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:28,586 INFO 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 16:19:28,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:28,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826766241] [2024-06-04 16:19:28,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826766241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:28,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:28,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:19:28,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566582509] [2024-06-04 16:19:28,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:28,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:19:28,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:28,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:19:28,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:19:28,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:28,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 592 transitions, 7404 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 16:19:28,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:28,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:28,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:29,916 INFO L124 PetriNetUnfolderBase]: 3629/6158 cut-off events. [2024-06-04 16:19:29,916 INFO L125 PetriNetUnfolderBase]: For 799484/799490 co-relation queries the response was YES. [2024-06-04 16:19:29,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44333 conditions, 6158 events. 3629/6158 cut-off events. For 799484/799490 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42755 event pairs, 666 based on Foata normal form. 5/6158 useless extension candidates. Maximal degree in co-relation 44133. Up to 5290 conditions per place. [2024-06-04 16:19:30,021 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 460 selfloop transitions, 167 changer transitions 0/634 dead transitions. [2024-06-04 16:19:30,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 634 transitions, 9006 flow [2024-06-04 16:19:30,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:19:30,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:19:30,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-04 16:19:30,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:19:30,022 INFO L175 Difference]: Start difference. First operand has 434 places, 592 transitions, 7404 flow. Second operand 10 states and 245 transitions. [2024-06-04 16:19:30,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 634 transitions, 9006 flow [2024-06-04 16:19:33,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 634 transitions, 8586 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-04 16:19:33,546 INFO L231 Difference]: Finished difference. Result has 435 places, 592 transitions, 7338 flow [2024-06-04 16:19:33,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6986, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7338, PETRI_PLACES=435, PETRI_TRANSITIONS=592} [2024-06-04 16:19:33,547 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-04 16:19:33,547 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 592 transitions, 7338 flow [2024-06-04 16:19:33,547 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 16:19:33,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:33,548 INFO L208 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 16:19:33,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-04 16:19:33,548 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 16:19:33,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:33,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1982507884, now seen corresponding path program 14 times [2024-06-04 16:19:33,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:33,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931586025] [2024-06-04 16:19:33,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:33,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:33,791 INFO 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 16:19:33,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:33,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931586025] [2024-06-04 16:19:33,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931586025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:33,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:33,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:19:33,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092235620] [2024-06-04 16:19:33,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:33,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:19:33,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:33,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:19:33,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:19:33,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:33,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 592 transitions, 7338 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 16:19:33,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:33,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:33,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:35,108 INFO L124 PetriNetUnfolderBase]: 3626/6154 cut-off events. [2024-06-04 16:19:35,109 INFO L125 PetriNetUnfolderBase]: For 791802/791808 co-relation queries the response was YES. [2024-06-04 16:19:35,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44176 conditions, 6154 events. 3626/6154 cut-off events. For 791802/791808 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42707 event pairs, 673 based on Foata normal form. 5/6154 useless extension candidates. Maximal degree in co-relation 43976. Up to 5303 conditions per place. [2024-06-04 16:19:35,205 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 438 selfloop transitions, 180 changer transitions 0/625 dead transitions. [2024-06-04 16:19:35,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 625 transitions, 9380 flow [2024-06-04 16:19:35,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:19:35,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:19:35,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-04 16:19:35,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:19:35,206 INFO L175 Difference]: Start difference. First operand has 435 places, 592 transitions, 7338 flow. Second operand 11 states and 253 transitions. [2024-06-04 16:19:35,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 625 transitions, 9380 flow [2024-06-04 16:19:39,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 625 transitions, 9010 flow, removed 12 selfloop flow, removed 12 redundant places. [2024-06-04 16:19:39,120 INFO L231 Difference]: Finished difference. Result has 434 places, 592 transitions, 7356 flow [2024-06-04 16:19:39,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6986, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7356, PETRI_PLACES=434, PETRI_TRANSITIONS=592} [2024-06-04 16:19:39,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-04 16:19:39,121 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 592 transitions, 7356 flow [2024-06-04 16:19:39,121 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 16:19:39,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:39,121 INFO L208 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 16:19:39,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-04 16:19:39,121 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 16:19:39,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:39,122 INFO L85 PathProgramCache]: Analyzing trace with hash 938260132, now seen corresponding path program 15 times [2024-06-04 16:19:39,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:39,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475100778] [2024-06-04 16:19:39,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:39,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:39,373 INFO 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 16:19:39,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:39,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475100778] [2024-06-04 16:19:39,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475100778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:39,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:39,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:19:39,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160786948] [2024-06-04 16:19:39,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:39,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:19:39,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:39,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:19:39,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:19:39,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:39,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 592 transitions, 7356 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 16:19:39,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:39,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:39,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:40,831 INFO L124 PetriNetUnfolderBase]: 3631/6161 cut-off events. [2024-06-04 16:19:40,831 INFO L125 PetriNetUnfolderBase]: For 767434/767440 co-relation queries the response was YES. [2024-06-04 16:19:40,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44025 conditions, 6161 events. 3631/6161 cut-off events. For 767434/767440 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 42779 event pairs, 675 based on Foata normal form. 5/6161 useless extension candidates. Maximal degree in co-relation 43827. Up to 5309 conditions per place. [2024-06-04 16:19:40,922 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 436 selfloop transitions, 183 changer transitions 0/626 dead transitions. [2024-06-04 16:19:40,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 626 transitions, 9196 flow [2024-06-04 16:19:40,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:19:40,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:19:40,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-04 16:19:40,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:19:40,923 INFO L175 Difference]: Start difference. First operand has 434 places, 592 transitions, 7356 flow. Second operand 10 states and 235 transitions. [2024-06-04 16:19:40,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 626 transitions, 9196 flow [2024-06-04 16:19:43,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 626 transitions, 8813 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-04 16:19:43,849 INFO L231 Difference]: Finished difference. Result has 436 places, 595 transitions, 7403 flow [2024-06-04 16:19:43,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6994, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7403, PETRI_PLACES=436, PETRI_TRANSITIONS=595} [2024-06-04 16:19:43,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-04 16:19:43,849 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 595 transitions, 7403 flow [2024-06-04 16:19:43,849 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 16:19:43,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:43,850 INFO L208 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 16:19:43,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-04 16:19:43,850 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 16:19:43,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:43,850 INFO L85 PathProgramCache]: Analyzing trace with hash 595585804, now seen corresponding path program 16 times [2024-06-04 16:19:43,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:43,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608786233] [2024-06-04 16:19:43,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:43,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:44,097 INFO 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 16:19:44,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:44,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608786233] [2024-06-04 16:19:44,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608786233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:44,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:44,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:19:44,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397395091] [2024-06-04 16:19:44,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:44,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:19:44,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:44,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:19:44,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:19:44,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:44,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 595 transitions, 7403 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 16:19:44,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:44,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:44,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:45,393 INFO L124 PetriNetUnfolderBase]: 3628/6146 cut-off events. [2024-06-04 16:19:45,394 INFO L125 PetriNetUnfolderBase]: For 759531/759531 co-relation queries the response was YES. [2024-06-04 16:19:45,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43739 conditions, 6146 events. 3628/6146 cut-off events. For 759531/759531 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 42595 event pairs, 676 based on Foata normal form. 1/6140 useless extension candidates. Maximal degree in co-relation 43541. Up to 5306 conditions per place. [2024-06-04 16:19:45,493 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 429 selfloop transitions, 187 changer transitions 0/623 dead transitions. [2024-06-04 16:19:45,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 623 transitions, 9179 flow [2024-06-04 16:19:45,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:19:45,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:19:45,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-04 16:19:45,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:19:45,494 INFO L175 Difference]: Start difference. First operand has 436 places, 595 transitions, 7403 flow. Second operand 10 states and 230 transitions. [2024-06-04 16:19:45,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 623 transitions, 9179 flow [2024-06-04 16:19:48,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 623 transitions, 8882 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-04 16:19:48,164 INFO L231 Difference]: Finished difference. Result has 438 places, 595 transitions, 7494 flow [2024-06-04 16:19:48,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7110, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7494, PETRI_PLACES=438, PETRI_TRANSITIONS=595} [2024-06-04 16:19:48,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-04 16:19:48,165 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 595 transitions, 7494 flow [2024-06-04 16:19:48,165 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 16:19:48,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:48,165 INFO L208 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 16:19:48,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-04 16:19:48,166 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 16:19:48,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:48,166 INFO L85 PathProgramCache]: Analyzing trace with hash 567124846, now seen corresponding path program 25 times [2024-06-04 16:19:48,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:48,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747677758] [2024-06-04 16:19:48,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:48,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:48,435 INFO 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 16:19:48,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:48,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747677758] [2024-06-04 16:19:48,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747677758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:48,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:48,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:19:48,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237958298] [2024-06-04 16:19:48,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:48,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:19:48,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:48,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:19:48,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:19:48,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:48,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 595 transitions, 7494 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 16:19:48,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:48,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:48,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:49,786 INFO L124 PetriNetUnfolderBase]: 3625/6153 cut-off events. [2024-06-04 16:19:49,786 INFO L125 PetriNetUnfolderBase]: For 753642/753648 co-relation queries the response was YES. [2024-06-04 16:19:49,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43644 conditions, 6153 events. 3625/6153 cut-off events. For 753642/753648 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 42711 event pairs, 666 based on Foata normal form. 5/6153 useless extension candidates. Maximal degree in co-relation 43446. Up to 5286 conditions per place. [2024-06-04 16:19:49,884 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 167 changer transitions 0/640 dead transitions. [2024-06-04 16:19:49,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 640 transitions, 8874 flow [2024-06-04 16:19:49,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:19:49,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:19:49,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-06-04 16:19:49,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-06-04 16:19:49,893 INFO L175 Difference]: Start difference. First operand has 438 places, 595 transitions, 7494 flow. Second operand 11 states and 266 transitions. [2024-06-04 16:19:49,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 640 transitions, 8874 flow [2024-06-04 16:19:53,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 640 transitions, 8456 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-04 16:19:53,026 INFO L231 Difference]: Finished difference. Result has 440 places, 595 transitions, 7432 flow [2024-06-04 16:19:53,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7076, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7432, PETRI_PLACES=440, PETRI_TRANSITIONS=595} [2024-06-04 16:19:53,030 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-04 16:19:53,030 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 595 transitions, 7432 flow [2024-06-04 16:19:53,030 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 16:19:53,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:53,031 INFO L208 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 16:19:53,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-04 16:19:53,031 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 16:19:53,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:53,031 INFO L85 PathProgramCache]: Analyzing trace with hash 567362182, now seen corresponding path program 17 times [2024-06-04 16:19:53,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:53,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193060937] [2024-06-04 16:19:53,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:53,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:53,288 INFO 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 16:19:53,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:53,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193060937] [2024-06-04 16:19:53,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193060937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:53,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:53,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:19:53,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553896023] [2024-06-04 16:19:53,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:53,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:19:53,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:53,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:19:53,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:19:53,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:53,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 595 transitions, 7432 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 16:19:53,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:53,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:53,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:54,650 INFO L124 PetriNetUnfolderBase]: 3622/6149 cut-off events. [2024-06-04 16:19:54,651 INFO L125 PetriNetUnfolderBase]: For 746541/746547 co-relation queries the response was YES. [2024-06-04 16:19:54,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43482 conditions, 6149 events. 3622/6149 cut-off events. For 746541/746547 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 42664 event pairs, 675 based on Foata normal form. 5/6149 useless extension candidates. Maximal degree in co-relation 43283. Up to 5299 conditions per place. [2024-06-04 16:19:54,743 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 436 selfloop transitions, 180 changer transitions 0/623 dead transitions. [2024-06-04 16:19:54,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 623 transitions, 8972 flow [2024-06-04 16:19:54,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:19:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:19:54,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 16:19:54,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:19:54,744 INFO L175 Difference]: Start difference. First operand has 440 places, 595 transitions, 7432 flow. Second operand 8 states and 196 transitions. [2024-06-04 16:19:54,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 623 transitions, 8972 flow [2024-06-04 16:19:57,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 623 transitions, 8612 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-04 16:19:57,937 INFO L231 Difference]: Finished difference. Result has 437 places, 595 transitions, 7454 flow [2024-06-04 16:19:57,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7080, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7454, PETRI_PLACES=437, PETRI_TRANSITIONS=595} [2024-06-04 16:19:57,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-04 16:19:57,937 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 595 transitions, 7454 flow [2024-06-04 16:19:57,938 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 16:19:57,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:57,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:57,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-04 16:19:57,938 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 16:19:57,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:57,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1606611184, now seen corresponding path program 18 times [2024-06-04 16:19:57,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:57,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986489426] [2024-06-04 16:19:57,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:57,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:58,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:58,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986489426] [2024-06-04 16:19:58,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986489426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:58,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:58,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:19:58,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660306759] [2024-06-04 16:19:58,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:58,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:19:58,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:58,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:19:58,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:19:58,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:19:58,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 595 transitions, 7454 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 16:19:58,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:58,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:19:58,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:59,520 INFO L124 PetriNetUnfolderBase]: 3619/6145 cut-off events. [2024-06-04 16:19:59,520 INFO L125 PetriNetUnfolderBase]: For 705086/705092 co-relation queries the response was YES. [2024-06-04 16:19:59,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43061 conditions, 6145 events. 3619/6145 cut-off events. For 705086/705092 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 42671 event pairs, 675 based on Foata normal form. 5/6145 useless extension candidates. Maximal degree in co-relation 42862. Up to 5296 conditions per place. [2024-06-04 16:19:59,622 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 439 selfloop transitions, 181 changer transitions 0/627 dead transitions. [2024-06-04 16:19:59,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 627 transitions, 9238 flow [2024-06-04 16:19:59,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:19:59,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:19:59,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-04 16:19:59,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-04 16:19:59,623 INFO L175 Difference]: Start difference. First operand has 437 places, 595 transitions, 7454 flow. Second operand 8 states and 201 transitions. [2024-06-04 16:19:59,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 627 transitions, 9238 flow [2024-06-04 16:20:02,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 627 transitions, 8761 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-04 16:20:02,562 INFO L231 Difference]: Finished difference. Result has 435 places, 595 transitions, 7365 flow [2024-06-04 16:20:02,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6985, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7365, PETRI_PLACES=435, PETRI_TRANSITIONS=595} [2024-06-04 16:20:02,563 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-04 16:20:02,563 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 595 transitions, 7365 flow [2024-06-04 16:20:02,563 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 16:20:02,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:02,564 INFO L208 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 16:20:02,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-04 16:20:02,564 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 16:20:02,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:02,564 INFO L85 PathProgramCache]: Analyzing trace with hash 27061186, now seen corresponding path program 19 times [2024-06-04 16:20:02,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:02,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925182642] [2024-06-04 16:20:02,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:02,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:02,802 INFO 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 16:20:02,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:02,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925182642] [2024-06-04 16:20:02,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925182642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:02,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:02,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:20:02,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591339187] [2024-06-04 16:20:02,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:02,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:20:02,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:02,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:20:02,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:20:02,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:02,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 595 transitions, 7365 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 16:20:02,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:02,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:02,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:04,044 INFO L124 PetriNetUnfolderBase]: 3616/6139 cut-off events. [2024-06-04 16:20:04,044 INFO L125 PetriNetUnfolderBase]: For 684532/684532 co-relation queries the response was YES. [2024-06-04 16:20:04,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42784 conditions, 6139 events. 3616/6139 cut-off events. For 684532/684532 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 42631 event pairs, 654 based on Foata normal form. 1/6137 useless extension candidates. Maximal degree in co-relation 42586. Up to 5417 conditions per place. [2024-06-04 16:20:04,151 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 522 selfloop transitions, 89 changer transitions 0/618 dead transitions. [2024-06-04 16:20:04,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 618 transitions, 8875 flow [2024-06-04 16:20:04,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:20:04,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:20:04,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-04 16:20:04,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-04 16:20:04,153 INFO L175 Difference]: Start difference. First operand has 435 places, 595 transitions, 7365 flow. Second operand 6 states and 156 transitions. [2024-06-04 16:20:04,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 618 transitions, 8875 flow [2024-06-04 16:20:07,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 618 transitions, 8513 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-04 16:20:07,492 INFO L231 Difference]: Finished difference. Result has 432 places, 595 transitions, 7208 flow [2024-06-04 16:20:07,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7009, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7208, PETRI_PLACES=432, PETRI_TRANSITIONS=595} [2024-06-04 16:20:07,493 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-04 16:20:07,493 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 595 transitions, 7208 flow [2024-06-04 16:20:07,493 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 16:20:07,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:07,493 INFO L208 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 16:20:07,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-04 16:20:07,494 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 16:20:07,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:07,494 INFO L85 PathProgramCache]: Analyzing trace with hash 861435064, now seen corresponding path program 20 times [2024-06-04 16:20:07,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:07,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39216922] [2024-06-04 16:20:07,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:07,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:07,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:07,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39216922] [2024-06-04 16:20:07,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39216922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:07,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:07,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:20:07,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197018006] [2024-06-04 16:20:07,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:07,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:20:07,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:07,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:20:07,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:20:07,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:07,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 595 transitions, 7208 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 16:20:07,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:07,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:07,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:09,101 INFO L124 PetriNetUnfolderBase]: 3613/6135 cut-off events. [2024-06-04 16:20:09,101 INFO L125 PetriNetUnfolderBase]: For 655358/655358 co-relation queries the response was YES. [2024-06-04 16:20:09,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42263 conditions, 6135 events. 3613/6135 cut-off events. For 655358/655358 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 42576 event pairs, 654 based on Foata normal form. 1/6133 useless extension candidates. Maximal degree in co-relation 42067. Up to 5414 conditions per place. [2024-06-04 16:20:09,208 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 528 selfloop transitions, 89 changer transitions 0/624 dead transitions. [2024-06-04 16:20:09,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 624 transitions, 8516 flow [2024-06-04 16:20:09,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:20:09,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:20:09,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-04 16:20:09,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-04 16:20:09,209 INFO L175 Difference]: Start difference. First operand has 432 places, 595 transitions, 7208 flow. Second operand 7 states and 181 transitions. [2024-06-04 16:20:09,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 624 transitions, 8516 flow [2024-06-04 16:20:12,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 624 transitions, 8221 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 16:20:12,166 INFO L231 Difference]: Finished difference. Result has 432 places, 595 transitions, 7115 flow [2024-06-04 16:20:12,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6913, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7115, PETRI_PLACES=432, PETRI_TRANSITIONS=595} [2024-06-04 16:20:12,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-04 16:20:12,167 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 595 transitions, 7115 flow [2024-06-04 16:20:12,167 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 16:20:12,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:12,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:12,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-04 16:20:12,167 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 16:20:12,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:12,168 INFO L85 PathProgramCache]: Analyzing trace with hash 22296610, now seen corresponding path program 7 times [2024-06-04 16:20:12,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:12,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722643136] [2024-06-04 16:20:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:12,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:12,436 INFO 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 16:20:12,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:12,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722643136] [2024-06-04 16:20:12,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722643136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:12,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:12,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:20:12,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677151040] [2024-06-04 16:20:12,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:12,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:20:12,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:12,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:20:12,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:20:12,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:12,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 595 transitions, 7115 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 16:20:12,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:12,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:12,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:13,712 INFO L124 PetriNetUnfolderBase]: 3669/6227 cut-off events. [2024-06-04 16:20:13,713 INFO L125 PetriNetUnfolderBase]: For 754603/754603 co-relation queries the response was YES. [2024-06-04 16:20:13,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42975 conditions, 6227 events. 3669/6227 cut-off events. For 754603/754603 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 43257 event pairs, 536 based on Foata normal form. 16/6240 useless extension candidates. Maximal degree in co-relation 42779. Up to 5338 conditions per place. [2024-06-04 16:20:13,810 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 518 selfloop transitions, 105 changer transitions 0/630 dead transitions. [2024-06-04 16:20:13,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 630 transitions, 8525 flow [2024-06-04 16:20:13,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:20:13,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:20:13,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-04 16:20:13,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-04 16:20:13,811 INFO L175 Difference]: Start difference. First operand has 432 places, 595 transitions, 7115 flow. Second operand 7 states and 184 transitions. [2024-06-04 16:20:13,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 630 transitions, 8525 flow [2024-06-04 16:20:17,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 630 transitions, 8197 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-04 16:20:17,057 INFO L231 Difference]: Finished difference. Result has 430 places, 597 transitions, 7091 flow [2024-06-04 16:20:17,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6787, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7091, PETRI_PLACES=430, PETRI_TRANSITIONS=597} [2024-06-04 16:20:17,058 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-04 16:20:17,058 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 597 transitions, 7091 flow [2024-06-04 16:20:17,058 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 16:20:17,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:17,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:17,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-04 16:20:17,059 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 16:20:17,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:17,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1977743308, now seen corresponding path program 8 times [2024-06-04 16:20:17,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:17,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309177400] [2024-06-04 16:20:17,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:17,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:17,315 INFO 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 16:20:17,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:17,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309177400] [2024-06-04 16:20:17,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309177400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:17,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:17,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:20:17,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198374216] [2024-06-04 16:20:17,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:17,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:20:17,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:17,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:20:17,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:20:17,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:17,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 597 transitions, 7091 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 16:20:17,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:17,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:17,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:18,660 INFO L124 PetriNetUnfolderBase]: 3725/6313 cut-off events. [2024-06-04 16:20:18,661 INFO L125 PetriNetUnfolderBase]: For 762152/762158 co-relation queries the response was YES. [2024-06-04 16:20:18,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43914 conditions, 6313 events. 3725/6313 cut-off events. For 762152/762158 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 43929 event pairs, 691 based on Foata normal form. 20/6328 useless extension candidates. Maximal degree in co-relation 43718. Up to 5338 conditions per place. [2024-06-04 16:20:18,765 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 438 selfloop transitions, 187 changer transitions 0/632 dead transitions. [2024-06-04 16:20:18,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 632 transitions, 8507 flow [2024-06-04 16:20:18,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:20:18,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:20:18,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-04 16:20:18,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-06-04 16:20:18,766 INFO L175 Difference]: Start difference. First operand has 430 places, 597 transitions, 7091 flow. Second operand 10 states and 236 transitions. [2024-06-04 16:20:18,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 632 transitions, 8507 flow [2024-06-04 16:20:21,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 632 transitions, 8279 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-04 16:20:21,518 INFO L231 Difference]: Finished difference. Result has 435 places, 599 transitions, 7321 flow [2024-06-04 16:20:21,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6863, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7321, PETRI_PLACES=435, PETRI_TRANSITIONS=599} [2024-06-04 16:20:21,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-04 16:20:21,519 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 599 transitions, 7321 flow [2024-06-04 16:20:21,519 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 16:20:21,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:21,519 INFO L208 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 16:20:21,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-04 16:20:21,520 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 16:20:21,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:21,520 INFO L85 PathProgramCache]: Analyzing trace with hash 567359206, now seen corresponding path program 9 times [2024-06-04 16:20:21,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:21,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443015470] [2024-06-04 16:20:21,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:21,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:21,801 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 16:20:21,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:21,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443015470] [2024-06-04 16:20:21,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443015470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:21,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:21,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:20:21,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028979485] [2024-06-04 16:20:21,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:21,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:20:21,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:21,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:20:21,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:20:21,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:21,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 599 transitions, 7321 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 16:20:21,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:21,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:21,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:23,131 INFO L124 PetriNetUnfolderBase]: 3768/6386 cut-off events. [2024-06-04 16:20:23,131 INFO L125 PetriNetUnfolderBase]: For 763121/763127 co-relation queries the response was YES. [2024-06-04 16:20:23,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44409 conditions, 6386 events. 3768/6386 cut-off events. For 763121/763127 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 44528 event pairs, 700 based on Foata normal form. 20/6401 useless extension candidates. Maximal degree in co-relation 44212. Up to 5343 conditions per place. [2024-06-04 16:20:23,254 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 439 selfloop transitions, 186 changer transitions 0/632 dead transitions. [2024-06-04 16:20:23,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 632 transitions, 8737 flow [2024-06-04 16:20:23,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:20:23,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:20:23,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-04 16:20:23,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-04 16:20:23,255 INFO L175 Difference]: Start difference. First operand has 435 places, 599 transitions, 7321 flow. Second operand 8 states and 198 transitions. [2024-06-04 16:20:23,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 632 transitions, 8737 flow [2024-06-04 16:20:26,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 632 transitions, 8315 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-04 16:20:26,018 INFO L231 Difference]: Finished difference. Result has 435 places, 601 transitions, 7363 flow [2024-06-04 16:20:26,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6903, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7363, PETRI_PLACES=435, PETRI_TRANSITIONS=601} [2024-06-04 16:20:26,019 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-04 16:20:26,019 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 601 transitions, 7363 flow [2024-06-04 16:20:26,019 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 16:20:26,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:26,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:26,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-04 16:20:26,019 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 16:20:26,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:26,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1606518928, now seen corresponding path program 10 times [2024-06-04 16:20:26,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:26,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967979476] [2024-06-04 16:20:26,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:26,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:26,259 INFO 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 16:20:26,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:26,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967979476] [2024-06-04 16:20:26,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967979476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:26,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:26,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:20:26,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675890777] [2024-06-04 16:20:26,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:26,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:20:26,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:26,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:20:26,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:20:26,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:26,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 601 transitions, 7363 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 16:20:26,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:26,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:26,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:27,725 INFO L124 PetriNetUnfolderBase]: 3775/6403 cut-off events. [2024-06-04 16:20:27,725 INFO L125 PetriNetUnfolderBase]: For 694791/694797 co-relation queries the response was YES. [2024-06-04 16:20:27,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43594 conditions, 6403 events. 3775/6403 cut-off events. For 694791/694797 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 44639 event pairs, 569 based on Foata normal form. 16/6414 useless extension candidates. Maximal degree in co-relation 43396. Up to 4818 conditions per place. [2024-06-04 16:20:27,818 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 421 selfloop transitions, 212 changer transitions 0/640 dead transitions. [2024-06-04 16:20:27,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 640 transitions, 9009 flow [2024-06-04 16:20:27,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:20:27,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:20:27,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-04 16:20:27,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-04 16:20:27,819 INFO L175 Difference]: Start difference. First operand has 435 places, 601 transitions, 7363 flow. Second operand 8 states and 205 transitions. [2024-06-04 16:20:27,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 640 transitions, 9009 flow [2024-06-04 16:20:30,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 640 transitions, 8587 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-04 16:20:30,590 INFO L231 Difference]: Finished difference. Result has 437 places, 602 transitions, 7419 flow [2024-06-04 16:20:30,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6949, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7419, PETRI_PLACES=437, PETRI_TRANSITIONS=602} [2024-06-04 16:20:30,590 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-04 16:20:30,591 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 602 transitions, 7419 flow [2024-06-04 16:20:30,591 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 16:20:30,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:30,591 INFO L208 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 16:20:30,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-04 16:20:30,591 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 16:20:30,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:30,591 INFO L85 PathProgramCache]: Analyzing trace with hash 874776472, now seen corresponding path program 2 times [2024-06-04 16:20:30,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:30,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396884327] [2024-06-04 16:20:30,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:30,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:30,844 INFO 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 16:20:30,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:30,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396884327] [2024-06-04 16:20:30,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396884327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:30,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:30,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:20:30,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953189083] [2024-06-04 16:20:30,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:30,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:20:30,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:30,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:20:30,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:20:30,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:30,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 602 transitions, 7419 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 16:20:30,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:30,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:30,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:32,217 INFO L124 PetriNetUnfolderBase]: 3815/6471 cut-off events. [2024-06-04 16:20:32,218 INFO L125 PetriNetUnfolderBase]: For 682659/682659 co-relation queries the response was YES. [2024-06-04 16:20:32,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43972 conditions, 6471 events. 3815/6471 cut-off events. For 682659/682659 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 45205 event pairs, 544 based on Foata normal form. 12/6480 useless extension candidates. Maximal degree in co-relation 43773. Up to 5512 conditions per place. [2024-06-04 16:20:32,317 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 522 selfloop transitions, 105 changer transitions 0/634 dead transitions. [2024-06-04 16:20:32,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 634 transitions, 8827 flow [2024-06-04 16:20:32,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:20:32,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:20:32,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-04 16:20:32,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-04 16:20:32,318 INFO L175 Difference]: Start difference. First operand has 437 places, 602 transitions, 7419 flow. Second operand 7 states and 179 transitions. [2024-06-04 16:20:32,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 634 transitions, 8827 flow [2024-06-04 16:20:35,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 634 transitions, 8417 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 16:20:35,337 INFO L231 Difference]: Finished difference. Result has 438 places, 604 transitions, 7286 flow [2024-06-04 16:20:35,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7009, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7286, PETRI_PLACES=438, PETRI_TRANSITIONS=604} [2024-06-04 16:20:35,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-04 16:20:35,338 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 604 transitions, 7286 flow [2024-06-04 16:20:35,338 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 16:20:35,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:35,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:35,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-04 16:20:35,338 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 16:20:35,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:35,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1991087692, now seen corresponding path program 3 times [2024-06-04 16:20:35,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:35,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866491575] [2024-06-04 16:20:35,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:35,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:35,610 INFO 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 16:20:35,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:35,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866491575] [2024-06-04 16:20:35,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866491575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:35,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:35,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:20:35,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042830123] [2024-06-04 16:20:35,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:35,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:20:35,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:35,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:20:35,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:20:35,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:35,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 604 transitions, 7286 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 16:20:35,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:35,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:35,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:37,189 INFO L124 PetriNetUnfolderBase]: 3855/6547 cut-off events. [2024-06-04 16:20:37,189 INFO L125 PetriNetUnfolderBase]: For 684704/684710 co-relation queries the response was YES. [2024-06-04 16:20:37,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43948 conditions, 6547 events. 3855/6547 cut-off events. For 684704/684710 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 45837 event pairs, 697 based on Foata normal form. 16/6558 useless extension candidates. Maximal degree in co-relation 43749. Up to 5236 conditions per place. [2024-06-04 16:20:37,294 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 432 selfloop transitions, 203 changer transitions 0/642 dead transitions. [2024-06-04 16:20:37,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 642 transitions, 8728 flow [2024-06-04 16:20:37,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:20:37,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:20:37,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-04 16:20:37,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-04 16:20:37,295 INFO L175 Difference]: Start difference. First operand has 438 places, 604 transitions, 7286 flow. Second operand 10 states and 238 transitions. [2024-06-04 16:20:37,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 642 transitions, 8728 flow [2024-06-04 16:20:39,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 642 transitions, 8473 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-04 16:20:39,993 INFO L231 Difference]: Finished difference. Result has 443 places, 606 transitions, 7511 flow [2024-06-04 16:20:39,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7031, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7511, PETRI_PLACES=443, PETRI_TRANSITIONS=606} [2024-06-04 16:20:39,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-04 16:20:39,994 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 606 transitions, 7511 flow [2024-06-04 16:20:39,994 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 16:20:39,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:39,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:39,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-04 16:20:39,994 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 16:20:39,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:39,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1793611426, now seen corresponding path program 4 times [2024-06-04 16:20:39,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:39,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858874810] [2024-06-04 16:20:39,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:39,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:40,316 INFO 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 16:20:40,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:40,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858874810] [2024-06-04 16:20:40,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858874810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:40,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:40,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:20:40,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896232186] [2024-06-04 16:20:40,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:40,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:20:40,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:40,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:20:40,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:20:40,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:40,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 606 transitions, 7511 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 16:20:40,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:40,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:40,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:41,712 INFO L124 PetriNetUnfolderBase]: 3908/6632 cut-off events. [2024-06-04 16:20:41,712 INFO L125 PetriNetUnfolderBase]: For 711943/711943 co-relation queries the response was YES. [2024-06-04 16:20:41,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45163 conditions, 6632 events. 3908/6632 cut-off events. For 711943/711943 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 46524 event pairs, 513 based on Foata normal form. 12/6641 useless extension candidates. Maximal degree in co-relation 44963. Up to 5338 conditions per place. [2024-06-04 16:20:41,812 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 527 selfloop transitions, 103 changer transitions 0/637 dead transitions. [2024-06-04 16:20:41,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 637 transitions, 9163 flow [2024-06-04 16:20:41,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:20:41,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:20:41,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 16:20:41,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-04 16:20:41,813 INFO L175 Difference]: Start difference. First operand has 443 places, 606 transitions, 7511 flow. Second operand 7 states and 176 transitions. [2024-06-04 16:20:41,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 637 transitions, 9163 flow [2024-06-04 16:20:44,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 637 transitions, 8703 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-04 16:20:44,856 INFO L231 Difference]: Finished difference. Result has 442 places, 608 transitions, 7338 flow [2024-06-04 16:20:44,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7057, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7338, PETRI_PLACES=442, PETRI_TRANSITIONS=608} [2024-06-04 16:20:44,856 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-04 16:20:44,856 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 608 transitions, 7338 flow [2024-06-04 16:20:44,856 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 16:20:44,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:44,857 INFO L208 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 16:20:44,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-04 16:20:44,857 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 16:20:44,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:44,857 INFO L85 PathProgramCache]: Analyzing trace with hash 2082397836, now seen corresponding path program 1 times [2024-06-04 16:20:44,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:44,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666882195] [2024-06-04 16:20:44,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:44,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:45,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:45,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666882195] [2024-06-04 16:20:45,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666882195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:45,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:45,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:20:45,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695748193] [2024-06-04 16:20:45,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:45,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:20:45,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:45,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:20:45,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:20:45,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:45,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 608 transitions, 7338 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 16:20:45,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:45,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:45,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:46,565 INFO L124 PetriNetUnfolderBase]: 3942/6679 cut-off events. [2024-06-04 16:20:46,565 INFO L125 PetriNetUnfolderBase]: For 672307/672313 co-relation queries the response was YES. [2024-06-04 16:20:46,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45569 conditions, 6679 events. 3942/6679 cut-off events. For 672307/672313 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 46889 event pairs, 735 based on Foata normal form. 2/6672 useless extension candidates. Maximal degree in co-relation 45368. Up to 5916 conditions per place. [2024-06-04 16:20:46,662 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 551 selfloop transitions, 82 changer transitions 0/640 dead transitions. [2024-06-04 16:20:46,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 640 transitions, 9070 flow [2024-06-04 16:20:46,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:20:46,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:20:46,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 16:20:46,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-04 16:20:46,664 INFO L175 Difference]: Start difference. First operand has 442 places, 608 transitions, 7338 flow. Second operand 7 states and 171 transitions. [2024-06-04 16:20:46,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 640 transitions, 9070 flow [2024-06-04 16:20:49,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 640 transitions, 8933 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-04 16:20:49,821 INFO L231 Difference]: Finished difference. Result has 447 places, 614 transitions, 7563 flow [2024-06-04 16:20:49,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7201, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7563, PETRI_PLACES=447, PETRI_TRANSITIONS=614} [2024-06-04 16:20:49,821 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-04 16:20:49,821 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 614 transitions, 7563 flow [2024-06-04 16:20:49,821 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 16:20:49,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:49,822 INFO L208 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 16:20:49,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-04 16:20:49,822 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 16:20:49,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:49,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1883390644, now seen corresponding path program 2 times [2024-06-04 16:20:49,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:49,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891890731] [2024-06-04 16:20:49,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:49,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:50,031 INFO 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 16:20:50,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:50,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891890731] [2024-06-04 16:20:50,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891890731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:50,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:50,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:20:50,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020952408] [2024-06-04 16:20:50,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:50,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:20:50,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:50,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:20:50,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:20:50,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:50,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 614 transitions, 7563 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 16:20:50,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:50,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:50,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:51,422 INFO L124 PetriNetUnfolderBase]: 3950/6698 cut-off events. [2024-06-04 16:20:51,423 INFO L125 PetriNetUnfolderBase]: For 682356/682362 co-relation queries the response was YES. [2024-06-04 16:20:51,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45878 conditions, 6698 events. 3950/6698 cut-off events. For 682356/682362 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 47103 event pairs, 746 based on Foata normal form. 2/6693 useless extension candidates. Maximal degree in co-relation 45674. Up to 5970 conditions per place. [2024-06-04 16:20:51,532 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 553 selfloop transitions, 77 changer transitions 0/637 dead transitions. [2024-06-04 16:20:51,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 637 transitions, 8943 flow [2024-06-04 16:20:51,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:20:51,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:20:51,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 16:20:51,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-04 16:20:51,533 INFO L175 Difference]: Start difference. First operand has 447 places, 614 transitions, 7563 flow. Second operand 7 states and 166 transitions. [2024-06-04 16:20:51,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 637 transitions, 8943 flow [2024-06-04 16:20:54,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 637 transitions, 8717 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-04 16:20:54,706 INFO L231 Difference]: Finished difference. Result has 451 places, 616 transitions, 7568 flow [2024-06-04 16:20:54,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7365, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7568, PETRI_PLACES=451, PETRI_TRANSITIONS=616} [2024-06-04 16:20:54,706 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-04 16:20:54,706 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 616 transitions, 7568 flow [2024-06-04 16:20:54,706 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 16:20:54,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:54,707 INFO L208 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 16:20:54,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-04 16:20:54,707 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 16:20:54,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:54,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1050519324, now seen corresponding path program 3 times [2024-06-04 16:20:54,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:54,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750325608] [2024-06-04 16:20:54,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:54,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:54,915 INFO 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 16:20:54,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:54,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750325608] [2024-06-04 16:20:54,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750325608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:54,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:54,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:20:54,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685118336] [2024-06-04 16:20:54,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:54,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:20:54,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:54,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:20:54,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:20:54,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:54,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 616 transitions, 7568 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 16:20:54,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:54,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:54,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:56,448 INFO L124 PetriNetUnfolderBase]: 3984/6743 cut-off events. [2024-06-04 16:20:56,448 INFO L125 PetriNetUnfolderBase]: For 698317/698323 co-relation queries the response was YES. [2024-06-04 16:20:56,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46699 conditions, 6743 events. 3984/6743 cut-off events. For 698317/698323 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 47431 event pairs, 744 based on Foata normal form. 6/6741 useless extension candidates. Maximal degree in co-relation 46493. Up to 5978 conditions per place. [2024-06-04 16:20:56,558 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 560 selfloop transitions, 78 changer transitions 0/645 dead transitions. [2024-06-04 16:20:56,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 645 transitions, 9314 flow [2024-06-04 16:20:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:20:56,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:20:56,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 16:20:56,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-04 16:20:56,559 INFO L175 Difference]: Start difference. First operand has 451 places, 616 transitions, 7568 flow. Second operand 7 states and 166 transitions. [2024-06-04 16:20:56,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 645 transitions, 9314 flow [2024-06-04 16:20:59,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 645 transitions, 9133 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 16:20:59,598 INFO L231 Difference]: Finished difference. Result has 454 places, 622 transitions, 7753 flow [2024-06-04 16:20:59,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7387, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7753, PETRI_PLACES=454, PETRI_TRANSITIONS=622} [2024-06-04 16:20:59,598 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-04 16:20:59,598 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 622 transitions, 7753 flow [2024-06-04 16:20:59,598 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 16:20:59,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:59,599 INFO L208 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 16:20:59,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-04 16:20:59,599 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 16:20:59,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:59,599 INFO L85 PathProgramCache]: Analyzing trace with hash 852961804, now seen corresponding path program 4 times [2024-06-04 16:20:59,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:59,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409629123] [2024-06-04 16:20:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:59,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:59,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:59,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409629123] [2024-06-04 16:20:59,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409629123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:59,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:59,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:20:59,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370251926] [2024-06-04 16:20:59,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:59,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:20:59,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:59,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:20:59,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:20:59,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:20:59,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 622 transitions, 7753 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 16:20:59,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:59,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:20:59,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:01,293 INFO L124 PetriNetUnfolderBase]: 3992/6766 cut-off events. [2024-06-04 16:21:01,293 INFO L125 PetriNetUnfolderBase]: For 710862/710868 co-relation queries the response was YES. [2024-06-04 16:21:01,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47035 conditions, 6766 events. 3992/6766 cut-off events. For 710862/710868 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 47606 event pairs, 735 based on Foata normal form. 6/6767 useless extension candidates. Maximal degree in co-relation 46827. Up to 6110 conditions per place. [2024-06-04 16:21:01,409 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 597 selfloop transitions, 38 changer transitions 0/642 dead transitions. [2024-06-04 16:21:01,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 642 transitions, 9111 flow [2024-06-04 16:21:01,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:21:01,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:21:01,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-04 16:21:01,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:21:01,410 INFO L175 Difference]: Start difference. First operand has 454 places, 622 transitions, 7753 flow. Second operand 7 states and 161 transitions. [2024-06-04 16:21:01,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 642 transitions, 9111 flow [2024-06-04 16:21:05,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 642 transitions, 8913 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-04 16:21:05,135 INFO L231 Difference]: Finished difference. Result has 458 places, 624 transitions, 7684 flow [2024-06-04 16:21:05,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7555, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7684, PETRI_PLACES=458, PETRI_TRANSITIONS=624} [2024-06-04 16:21:05,136 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-04 16:21:05,136 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 624 transitions, 7684 flow [2024-06-04 16:21:05,136 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 16:21:05,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:05,136 INFO L208 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 16:21:05,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-04 16:21:05,137 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 16:21:05,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:05,137 INFO L85 PathProgramCache]: Analyzing trace with hash -199536406, now seen corresponding path program 5 times [2024-06-04 16:21:05,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:05,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545623960] [2024-06-04 16:21:05,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:05,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:05,344 INFO 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 16:21:05,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:05,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545623960] [2024-06-04 16:21:05,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545623960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:05,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:05,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:21:05,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670456511] [2024-06-04 16:21:05,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:05,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:21:05,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:05,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:21:05,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:21:05,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:21:05,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 624 transitions, 7684 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 16:21:05,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:05,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:21:05,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:06,908 INFO L124 PetriNetUnfolderBase]: 4000/6772 cut-off events. [2024-06-04 16:21:06,908 INFO L125 PetriNetUnfolderBase]: For 720872/720878 co-relation queries the response was YES. [2024-06-04 16:21:06,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47053 conditions, 6772 events. 4000/6772 cut-off events. For 720872/720878 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 47664 event pairs, 751 based on Foata normal form. 6/6770 useless extension candidates. Maximal degree in co-relation 46843. Up to 6044 conditions per place. [2024-06-04 16:21:07,011 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 564 selfloop transitions, 73 changer transitions 0/644 dead transitions. [2024-06-04 16:21:07,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 644 transitions, 9042 flow [2024-06-04 16:21:07,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:21:07,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:21:07,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-04 16:21:07,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:21:07,012 INFO L175 Difference]: Start difference. First operand has 458 places, 624 transitions, 7684 flow. Second operand 7 states and 161 transitions. [2024-06-04 16:21:07,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 644 transitions, 9042 flow [2024-06-04 16:21:09,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 644 transitions, 8935 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-04 16:21:09,621 INFO L231 Difference]: Finished difference. Result has 460 places, 626 transitions, 7772 flow [2024-06-04 16:21:09,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7577, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7772, PETRI_PLACES=460, PETRI_TRANSITIONS=626} [2024-06-04 16:21:09,622 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-04 16:21:09,622 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 626 transitions, 7772 flow [2024-06-04 16:21:09,622 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 16:21:09,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:09,622 INFO L208 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 16:21:09,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-04 16:21:09,622 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 16:21:09,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:09,623 INFO L85 PathProgramCache]: Analyzing trace with hash 842766450, now seen corresponding path program 6 times [2024-06-04 16:21:09,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:09,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927679357] [2024-06-04 16:21:09,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:09,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:09,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:09,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927679357] [2024-06-04 16:21:09,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927679357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:09,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:09,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:21:09,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346741661] [2024-06-04 16:21:09,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:09,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:21:09,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:09,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:21:09,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:21:09,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:21:09,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 626 transitions, 7772 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 16:21:09,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:09,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:21:09,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:11,302 INFO L124 PetriNetUnfolderBase]: 4008/6806 cut-off events. [2024-06-04 16:21:11,302 INFO L125 PetriNetUnfolderBase]: For 733330/733336 co-relation queries the response was YES. [2024-06-04 16:21:11,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47377 conditions, 6806 events. 4008/6806 cut-off events. For 733330/733336 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 47949 event pairs, 629 based on Foata normal form. 6/6804 useless extension candidates. Maximal degree in co-relation 47166. Up to 5799 conditions per place. [2024-06-04 16:21:11,417 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 539 selfloop transitions, 110 changer transitions 0/656 dead transitions. [2024-06-04 16:21:11,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 656 transitions, 9779 flow [2024-06-04 16:21:11,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:21:11,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:21:11,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-04 16:21:11,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:21:11,418 INFO L175 Difference]: Start difference. First operand has 460 places, 626 transitions, 7772 flow. Second operand 7 states and 168 transitions. [2024-06-04 16:21:11,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 656 transitions, 9779 flow [2024-06-04 16:21:14,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 656 transitions, 9606 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-04 16:21:14,499 INFO L231 Difference]: Finished difference. Result has 463 places, 631 transitions, 8022 flow [2024-06-04 16:21:14,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7599, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8022, PETRI_PLACES=463, PETRI_TRANSITIONS=631} [2024-06-04 16:21:14,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-04 16:21:14,500 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 631 transitions, 8022 flow [2024-06-04 16:21:14,500 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 16:21:14,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:14,500 INFO L208 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 16:21:14,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-04 16:21:14,500 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 16:21:14,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:14,501 INFO L85 PathProgramCache]: Analyzing trace with hash 371847402, now seen corresponding path program 7 times [2024-06-04 16:21:14,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:14,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019699093] [2024-06-04 16:21:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:14,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:14,710 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 16:21:14,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:14,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019699093] [2024-06-04 16:21:14,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019699093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:14,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:14,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:21:14,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966929072] [2024-06-04 16:21:14,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:14,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:21:14,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:14,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:21:14,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:21:14,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:21:14,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 631 transitions, 8022 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 16:21:14,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:14,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:21:14,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:16,211 INFO L124 PetriNetUnfolderBase]: 4016/6817 cut-off events. [2024-06-04 16:21:16,212 INFO L125 PetriNetUnfolderBase]: For 747942/747948 co-relation queries the response was YES. [2024-06-04 16:21:16,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47938 conditions, 6817 events. 4016/6817 cut-off events. For 747942/747948 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 48093 event pairs, 632 based on Foata normal form. 6/6815 useless extension candidates. Maximal degree in co-relation 47725. Up to 5807 conditions per place. [2024-06-04 16:21:16,321 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 536 selfloop transitions, 111 changer transitions 0/654 dead transitions. [2024-06-04 16:21:16,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 654 transitions, 9678 flow [2024-06-04 16:21:16,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:21:16,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:21:16,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 16:21:16,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-04 16:21:16,322 INFO L175 Difference]: Start difference. First operand has 463 places, 631 transitions, 8022 flow. Second operand 7 states and 164 transitions. [2024-06-04 16:21:16,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 654 transitions, 9678 flow [2024-06-04 16:21:19,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 654 transitions, 9255 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-04 16:21:19,307 INFO L231 Difference]: Finished difference. Result has 465 places, 633 transitions, 7902 flow [2024-06-04 16:21:19,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7635, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7902, PETRI_PLACES=465, PETRI_TRANSITIONS=633} [2024-06-04 16:21:19,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-04 16:21:19,307 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 633 transitions, 7902 flow [2024-06-04 16:21:19,308 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 16:21:19,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:19,308 INFO L208 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 16:21:19,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-04 16:21:19,308 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 16:21:19,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:19,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1177581334, now seen corresponding path program 8 times [2024-06-04 16:21:19,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:19,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547803988] [2024-06-04 16:21:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:19,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:19,516 INFO 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 16:21:19,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:19,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547803988] [2024-06-04 16:21:19,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547803988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:19,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:19,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:21:19,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326768601] [2024-06-04 16:21:19,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:19,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:21:19,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:19,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:21:19,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:21:19,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:21:19,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 633 transitions, 7902 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 16:21:19,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:19,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:21:19,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:20,938 INFO L124 PetriNetUnfolderBase]: 4037/6843 cut-off events. [2024-06-04 16:21:20,938 INFO L125 PetriNetUnfolderBase]: For 769623/769629 co-relation queries the response was YES. [2024-06-04 16:21:21,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48003 conditions, 6843 events. 4037/6843 cut-off events. For 769623/769629 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48364 event pairs, 752 based on Foata normal form. 6/6837 useless extension candidates. Maximal degree in co-relation 47790. Up to 6064 conditions per place. [2024-06-04 16:21:21,069 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 567 selfloop transitions, 80 changer transitions 0/654 dead transitions. [2024-06-04 16:21:21,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 654 transitions, 9566 flow [2024-06-04 16:21:21,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:21:21,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:21:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-04 16:21:21,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-06-04 16:21:21,070 INFO L175 Difference]: Start difference. First operand has 465 places, 633 transitions, 7902 flow. Second operand 7 states and 160 transitions. [2024-06-04 16:21:21,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 654 transitions, 9566 flow [2024-06-04 16:21:23,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 654 transitions, 9362 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-04 16:21:23,787 INFO L231 Difference]: Finished difference. Result has 469 places, 637 transitions, 7976 flow [2024-06-04 16:21:23,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7702, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7976, PETRI_PLACES=469, PETRI_TRANSITIONS=637} [2024-06-04 16:21:23,788 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-04 16:21:23,788 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 637 transitions, 7976 flow [2024-06-04 16:21:23,788 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 16:21:23,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:23,788 INFO L208 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 16:21:23,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-04 16:21:23,789 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 16:21:23,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:23,789 INFO L85 PathProgramCache]: Analyzing trace with hash 931421490, now seen corresponding path program 9 times [2024-06-04 16:21:23,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:23,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512170488] [2024-06-04 16:21:23,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:23,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:24,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:24,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512170488] [2024-06-04 16:21:24,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512170488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:24,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:24,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:21:24,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992177842] [2024-06-04 16:21:24,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:24,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:21:24,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:24,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:21:24,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:21:24,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:21:24,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 637 transitions, 7976 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 16:21:24,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:24,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:21:24,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:25,507 INFO L124 PetriNetUnfolderBase]: 4032/6840 cut-off events. [2024-06-04 16:21:25,507 INFO L125 PetriNetUnfolderBase]: For 767264/767270 co-relation queries the response was YES. [2024-06-04 16:21:25,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47666 conditions, 6840 events. 4032/6840 cut-off events. For 767264/767270 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48335 event pairs, 757 based on Foata normal form. 6/6838 useless extension candidates. Maximal degree in co-relation 47451. Up to 6092 conditions per place. [2024-06-04 16:21:25,613 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 573 selfloop transitions, 72 changer transitions 0/652 dead transitions. [2024-06-04 16:21:25,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 652 transitions, 9302 flow [2024-06-04 16:21:25,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:21:25,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:21:25,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-04 16:21:25,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374149659863946 [2024-06-04 16:21:25,614 INFO L175 Difference]: Start difference. First operand has 469 places, 637 transitions, 7976 flow. Second operand 7 states and 158 transitions. [2024-06-04 16:21:25,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 652 transitions, 9302 flow [2024-06-04 16:21:28,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 652 transitions, 9098 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-04 16:21:28,661 INFO L231 Difference]: Finished difference. Result has 472 places, 637 transitions, 7921 flow [2024-06-04 16:21:28,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7772, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7921, PETRI_PLACES=472, PETRI_TRANSITIONS=637} [2024-06-04 16:21:28,661 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-04 16:21:28,661 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 637 transitions, 7921 flow [2024-06-04 16:21:28,662 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 16:21:28,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:28,662 INFO L208 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 16:21:28,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-04 16:21:28,662 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 16:21:28,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:28,662 INFO L85 PathProgramCache]: Analyzing trace with hash -115096086, now seen corresponding path program 10 times [2024-06-04 16:21:28,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:28,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116186474] [2024-06-04 16:21:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:28,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:28,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:28,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116186474] [2024-06-04 16:21:28,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116186474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:28,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:28,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:21:28,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421397257] [2024-06-04 16:21:28,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:28,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:21:28,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:28,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:21:28,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:21:28,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:21:28,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 637 transitions, 7921 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 16:21:28,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:28,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:21:28,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:30,552 INFO L124 PetriNetUnfolderBase]: 4022/6821 cut-off events. [2024-06-04 16:21:30,552 INFO L125 PetriNetUnfolderBase]: For 763519/763525 co-relation queries the response was YES. [2024-06-04 16:21:30,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47027 conditions, 6821 events. 4022/6821 cut-off events. For 763519/763525 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48206 event pairs, 748 based on Foata normal form. 8/6821 useless extension candidates. Maximal degree in co-relation 46811. Up to 6069 conditions per place. [2024-06-04 16:21:30,653 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 584 selfloop transitions, 66 changer transitions 0/657 dead transitions. [2024-06-04 16:21:30,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 657 transitions, 9271 flow [2024-06-04 16:21:30,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:21:30,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:21:30,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 16:21:30,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:21:30,655 INFO L175 Difference]: Start difference. First operand has 472 places, 637 transitions, 7921 flow. Second operand 6 states and 147 transitions. [2024-06-04 16:21:30,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 657 transitions, 9271 flow [2024-06-04 16:21:33,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 657 transitions, 9069 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-04 16:21:33,458 INFO L231 Difference]: Finished difference. Result has 472 places, 637 transitions, 7862 flow [2024-06-04 16:21:33,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7719, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7862, PETRI_PLACES=472, PETRI_TRANSITIONS=637} [2024-06-04 16:21:33,458 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-04 16:21:33,458 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 637 transitions, 7862 flow [2024-06-04 16:21:33,458 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 16:21:33,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:33,459 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 16:21:33,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-04 16:21:33,459 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 16:21:33,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:33,459 INFO L85 PathProgramCache]: Analyzing trace with hash -105572886, now seen corresponding path program 11 times [2024-06-04 16:21:33,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:33,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413329241] [2024-06-04 16:21:33,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:33,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:33,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:33,670 INFO 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 16:21:33,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:33,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413329241] [2024-06-04 16:21:33,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413329241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:33,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:33,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:21:33,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395097125] [2024-06-04 16:21:33,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:33,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:21:33,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:33,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:21:33,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:21:33,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:21:33,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 637 transitions, 7862 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 16:21:33,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:33,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:21:33,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:35,165 INFO L124 PetriNetUnfolderBase]: 4012/6822 cut-off events. [2024-06-04 16:21:35,165 INFO L125 PetriNetUnfolderBase]: For 744828/744834 co-relation queries the response was YES. [2024-06-04 16:21:35,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46467 conditions, 6822 events. 4012/6822 cut-off events. For 744828/744834 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48218 event pairs, 633 based on Foata normal form. 8/6822 useless extension candidates. Maximal degree in co-relation 46250. Up to 5908 conditions per place. [2024-06-04 16:21:35,278 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 564 selfloop transitions, 88 changer transitions 0/659 dead transitions. [2024-06-04 16:21:35,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 659 transitions, 9464 flow [2024-06-04 16:21:35,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:21:35,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:21:35,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 16:21:35,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-04 16:21:35,279 INFO L175 Difference]: Start difference. First operand has 472 places, 637 transitions, 7862 flow. Second operand 6 states and 149 transitions. [2024-06-04 16:21:35,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 659 transitions, 9464 flow [2024-06-04 16:21:38,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 659 transitions, 9261 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 16:21:38,419 INFO L231 Difference]: Finished difference. Result has 472 places, 637 transitions, 7846 flow [2024-06-04 16:21:38,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7659, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7846, PETRI_PLACES=472, PETRI_TRANSITIONS=637} [2024-06-04 16:21:38,420 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-04 16:21:38,420 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 637 transitions, 7846 flow [2024-06-04 16:21:38,420 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 16:21:38,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:38,420 INFO L208 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 16:21:38,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-04 16:21:38,421 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 16:21:38,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:38,422 INFO L85 PathProgramCache]: Analyzing trace with hash -371596596, now seen corresponding path program 12 times [2024-06-04 16:21:38,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:38,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611486568] [2024-06-04 16:21:38,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:38,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:38,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:38,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:38,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611486568] [2024-06-04 16:21:38,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611486568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:38,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:38,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:21:38,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473586638] [2024-06-04 16:21:38,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:38,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:21:38,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:38,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:21:38,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:21:38,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:21:38,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 637 transitions, 7846 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 16:21:38,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:38,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:21:38,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:40,174 INFO L124 PetriNetUnfolderBase]: 4002/6799 cut-off events. [2024-06-04 16:21:40,174 INFO L125 PetriNetUnfolderBase]: For 725937/725943 co-relation queries the response was YES. [2024-06-04 16:21:40,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45952 conditions, 6799 events. 4002/6799 cut-off events. For 725937/725943 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48087 event pairs, 728 based on Foata normal form. 8/6802 useless extension candidates. Maximal degree in co-relation 45735. Up to 6035 conditions per place. [2024-06-04 16:21:40,297 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 585 selfloop transitions, 76 changer transitions 0/668 dead transitions. [2024-06-04 16:21:40,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 668 transitions, 9246 flow [2024-06-04 16:21:40,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:21:40,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:21:40,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-04 16:21:40,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-04 16:21:40,298 INFO L175 Difference]: Start difference. First operand has 472 places, 637 transitions, 7846 flow. Second operand 8 states and 195 transitions. [2024-06-04 16:21:40,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 668 transitions, 9246 flow [2024-06-04 16:21:44,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 668 transitions, 8995 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-04 16:21:44,017 INFO L231 Difference]: Finished difference. Result has 475 places, 637 transitions, 7761 flow [2024-06-04 16:21:44,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7595, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7761, PETRI_PLACES=475, PETRI_TRANSITIONS=637} [2024-06-04 16:21:44,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-04 16:21:44,018 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 637 transitions, 7761 flow [2024-06-04 16:21:44,018 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 16:21:44,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:44,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:21:44,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-04 16:21:44,018 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 16:21:44,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:44,019 INFO L85 PathProgramCache]: Analyzing trace with hash 71416902, now seen corresponding path program 3 times [2024-06-04 16:21:44,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:44,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814779126] [2024-06-04 16:21:44,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:44,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:44,325 INFO 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 16:21:44,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:44,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814779126] [2024-06-04 16:21:44,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814779126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:44,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:44,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:21:44,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648144129] [2024-06-04 16:21:44,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:44,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:21:44,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:44,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:21:44,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:21:44,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:21:44,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 637 transitions, 7761 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 16:21:44,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:44,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:21:44,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:45,869 INFO L124 PetriNetUnfolderBase]: 4010/6809 cut-off events. [2024-06-04 16:21:45,869 INFO L125 PetriNetUnfolderBase]: For 721004/721004 co-relation queries the response was YES. [2024-06-04 16:21:45,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46037 conditions, 6809 events. 4010/6809 cut-off events. For 721004/721004 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 48192 event pairs, 748 based on Foata normal form. 2/6804 useless extension candidates. Maximal degree in co-relation 45819. Up to 6088 conditions per place. [2024-06-04 16:21:45,993 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 581 selfloop transitions, 67 changer transitions 0/655 dead transitions. [2024-06-04 16:21:45,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 655 transitions, 9175 flow [2024-06-04 16:21:45,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:21:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:21:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-04 16:21:45,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5327380952380952 [2024-06-04 16:21:45,994 INFO L175 Difference]: Start difference. First operand has 475 places, 637 transitions, 7761 flow. Second operand 8 states and 179 transitions. [2024-06-04 16:21:45,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 655 transitions, 9175 flow [2024-06-04 16:21:49,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 655 transitions, 8982 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-04 16:21:49,885 INFO L231 Difference]: Finished difference. Result has 475 places, 639 transitions, 7791 flow [2024-06-04 16:21:49,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7568, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7791, PETRI_PLACES=475, PETRI_TRANSITIONS=639} [2024-06-04 16:21:49,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-04 16:21:49,886 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 639 transitions, 7791 flow [2024-06-04 16:21:49,886 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 16:21:49,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:49,887 INFO L208 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 16:21:49,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-04 16:21:49,887 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 16:21:49,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:49,887 INFO L85 PathProgramCache]: Analyzing trace with hash 2094223558, now seen corresponding path program 4 times [2024-06-04 16:21:49,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:49,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988254656] [2024-06-04 16:21:49,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:49,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:50,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:50,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:50,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988254656] [2024-06-04 16:21:50,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988254656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:50,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:50,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:21:50,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859205223] [2024-06-04 16:21:50,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:50,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:21:50,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:50,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:21:50,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:21:50,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:21:50,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 639 transitions, 7791 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 16:21:50,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:50,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:21:50,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:51,710 INFO L124 PetriNetUnfolderBase]: 4018/6817 cut-off events. [2024-06-04 16:21:51,711 INFO L125 PetriNetUnfolderBase]: For 722666/722666 co-relation queries the response was YES. [2024-06-04 16:21:51,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46189 conditions, 6817 events. 4018/6817 cut-off events. For 722666/722666 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 48147 event pairs, 742 based on Foata normal form. 2/6812 useless extension candidates. Maximal degree in co-relation 45970. Up to 6080 conditions per place. [2024-06-04 16:21:51,821 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 580 selfloop transitions, 72 changer transitions 0/659 dead transitions. [2024-06-04 16:21:51,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 659 transitions, 9221 flow [2024-06-04 16:21:51,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:21:51,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:21:51,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-04 16:21:51,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-04 16:21:51,822 INFO L175 Difference]: Start difference. First operand has 475 places, 639 transitions, 7791 flow. Second operand 9 states and 198 transitions. [2024-06-04 16:21:51,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 659 transitions, 9221 flow [2024-06-04 16:21:54,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 659 transitions, 9014 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-04 16:21:54,747 INFO L231 Difference]: Finished difference. Result has 478 places, 641 transitions, 7821 flow [2024-06-04 16:21:54,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7584, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7821, PETRI_PLACES=478, PETRI_TRANSITIONS=641} [2024-06-04 16:21:54,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-04 16:21:54,748 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 641 transitions, 7821 flow [2024-06-04 16:21:54,748 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 16:21:54,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:54,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:21:54,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-04 16:21:54,748 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 16:21:54,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:54,749 INFO L85 PathProgramCache]: Analyzing trace with hash 943035620, now seen corresponding path program 5 times [2024-06-04 16:21:54,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:54,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229232309] [2024-06-04 16:21:54,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:54,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:21:54,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:21:54,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:21:54,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229232309] [2024-06-04 16:21:54,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229232309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:21:54,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:21:54,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:21:54,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140363046] [2024-06-04 16:21:54,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:21:54,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:21:54,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:21:54,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:21:54,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:21:55,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:21:55,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 641 transitions, 7821 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 16:21:55,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:21:55,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:21:55,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:21:56,678 INFO L124 PetriNetUnfolderBase]: 4026/6842 cut-off events. [2024-06-04 16:21:56,679 INFO L125 PetriNetUnfolderBase]: For 735751/735757 co-relation queries the response was YES. [2024-06-04 16:21:56,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46422 conditions, 6842 events. 4026/6842 cut-off events. For 735751/735757 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 48449 event pairs, 744 based on Foata normal form. 6/6843 useless extension candidates. Maximal degree in co-relation 46202. Up to 6106 conditions per place. [2024-06-04 16:21:56,779 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 584 selfloop transitions, 70 changer transitions 0/661 dead transitions. [2024-06-04 16:21:56,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 661 transitions, 9261 flow [2024-06-04 16:21:56,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:21:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:21:56,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 16:21:56,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-04 16:21:56,780 INFO L175 Difference]: Start difference. First operand has 478 places, 641 transitions, 7821 flow. Second operand 7 states and 163 transitions. [2024-06-04 16:21:56,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 661 transitions, 9261 flow [2024-06-04 16:21:59,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 661 transitions, 9040 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-04 16:21:59,967 INFO L231 Difference]: Finished difference. Result has 478 places, 643 transitions, 7840 flow [2024-06-04 16:21:59,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7600, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7840, PETRI_PLACES=478, PETRI_TRANSITIONS=643} [2024-06-04 16:21:59,968 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-04 16:21:59,968 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 643 transitions, 7840 flow [2024-06-04 16:21:59,968 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 16:21:59,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:21:59,968 INFO L208 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 16:21:59,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-04 16:21:59,968 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 16:21:59,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:21:59,968 INFO L85 PathProgramCache]: Analyzing trace with hash 951606500, now seen corresponding path program 6 times [2024-06-04 16:21:59,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:21:59,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419442461] [2024-06-04 16:21:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:21:59,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:21:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:00,197 INFO 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 16:22:00,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:00,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419442461] [2024-06-04 16:22:00,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419442461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:00,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:00,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:22:00,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336431006] [2024-06-04 16:22:00,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:00,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:22:00,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:00,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:22:00,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:22:00,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:22:00,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 643 transitions, 7840 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 16:22:00,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:00,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:22:00,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:01,677 INFO L124 PetriNetUnfolderBase]: 4034/6846 cut-off events. [2024-06-04 16:22:01,677 INFO L125 PetriNetUnfolderBase]: For 747535/747541 co-relation queries the response was YES. [2024-06-04 16:22:01,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46609 conditions, 6846 events. 4034/6846 cut-off events. For 747535/747541 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 48396 event pairs, 732 based on Foata normal form. 6/6847 useless extension candidates. Maximal degree in co-relation 46388. Up to 6078 conditions per place. [2024-06-04 16:22:01,802 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 578 selfloop transitions, 80 changer transitions 0/665 dead transitions. [2024-06-04 16:22:01,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 665 transitions, 9296 flow [2024-06-04 16:22:01,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:22:01,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:22:01,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-04 16:22:01,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-04 16:22:01,803 INFO L175 Difference]: Start difference. First operand has 478 places, 643 transitions, 7840 flow. Second operand 8 states and 182 transitions. [2024-06-04 16:22:01,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 665 transitions, 9296 flow [2024-06-04 16:22:05,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 665 transitions, 9082 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-04 16:22:05,302 INFO L231 Difference]: Finished difference. Result has 481 places, 645 transitions, 7890 flow [2024-06-04 16:22:05,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7626, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7890, PETRI_PLACES=481, PETRI_TRANSITIONS=645} [2024-06-04 16:22:05,303 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 438 predicate places. [2024-06-04 16:22:05,303 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 645 transitions, 7890 flow [2024-06-04 16:22:05,303 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 16:22:05,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:05,303 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 16:22:05,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-04 16:22:05,303 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 16:22:05,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:05,304 INFO L85 PathProgramCache]: Analyzing trace with hash -2126275932, now seen corresponding path program 7 times [2024-06-04 16:22:05,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:05,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806371735] [2024-06-04 16:22:05,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:05,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:05,596 INFO 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 16:22:05,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:05,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806371735] [2024-06-04 16:22:05,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806371735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:05,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:05,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:22:05,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390775742] [2024-06-04 16:22:05,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:05,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:22:05,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:05,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:22:05,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:22:05,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:22:05,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 645 transitions, 7890 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 16:22:05,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:05,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:22:05,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:07,508 INFO L124 PetriNetUnfolderBase]: 4042/6861 cut-off events. [2024-06-04 16:22:07,508 INFO L125 PetriNetUnfolderBase]: For 758689/758689 co-relation queries the response was YES. [2024-06-04 16:22:07,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46874 conditions, 6861 events. 4042/6861 cut-off events. For 758689/758689 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 48598 event pairs, 751 based on Foata normal form. 2/6856 useless extension candidates. Maximal degree in co-relation 46652. Up to 6130 conditions per place. [2024-06-04 16:22:07,634 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 585 selfloop transitions, 70 changer transitions 0/662 dead transitions. [2024-06-04 16:22:07,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 662 transitions, 9332 flow [2024-06-04 16:22:07,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:22:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:22:07,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-04 16:22:07,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-06-04 16:22:07,635 INFO L175 Difference]: Start difference. First operand has 481 places, 645 transitions, 7890 flow. Second operand 7 states and 160 transitions. [2024-06-04 16:22:07,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 662 transitions, 9332 flow [2024-06-04 16:22:10,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 662 transitions, 9094 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-04 16:22:10,879 INFO L231 Difference]: Finished difference. Result has 482 places, 647 transitions, 7900 flow [2024-06-04 16:22:10,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7652, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7900, PETRI_PLACES=482, PETRI_TRANSITIONS=647} [2024-06-04 16:22:10,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 439 predicate places. [2024-06-04 16:22:10,880 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 647 transitions, 7900 flow [2024-06-04 16:22:10,880 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 16:22:10,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:10,880 INFO L208 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 16:22:10,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-04 16:22:10,881 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 16:22:10,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:10,881 INFO L85 PathProgramCache]: Analyzing trace with hash -2125828602, now seen corresponding path program 8 times [2024-06-04 16:22:10,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:10,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591924076] [2024-06-04 16:22:10,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:10,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:10,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:11,151 INFO 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 16:22:11,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:11,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591924076] [2024-06-04 16:22:11,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591924076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:11,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:11,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:22:11,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102918687] [2024-06-04 16:22:11,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:11,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:22:11,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:11,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:22:11,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:22:11,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:22:11,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 647 transitions, 7900 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 16:22:11,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:11,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:22:11,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:12,707 INFO L124 PetriNetUnfolderBase]: 4037/6838 cut-off events. [2024-06-04 16:22:12,708 INFO L125 PetriNetUnfolderBase]: For 752344/752344 co-relation queries the response was YES. [2024-06-04 16:22:12,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46443 conditions, 6838 events. 4037/6838 cut-off events. For 752344/752344 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 48309 event pairs, 738 based on Foata normal form. 2/6833 useless extension candidates. Maximal degree in co-relation 46220. Up to 6083 conditions per place. [2024-06-04 16:22:12,833 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 579 selfloop transitions, 80 changer transitions 0/666 dead transitions. [2024-06-04 16:22:12,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 666 transitions, 9358 flow [2024-06-04 16:22:12,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:22:12,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:22:12,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-04 16:22:12,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5327380952380952 [2024-06-04 16:22:12,835 INFO L175 Difference]: Start difference. First operand has 482 places, 647 transitions, 7900 flow. Second operand 8 states and 179 transitions. [2024-06-04 16:22:12,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 666 transitions, 9358 flow [2024-06-04 16:22:16,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 666 transitions, 9126 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-04 16:22:16,732 INFO L231 Difference]: Finished difference. Result has 485 places, 649 transitions, 7940 flow [2024-06-04 16:22:16,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7672, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7940, PETRI_PLACES=485, PETRI_TRANSITIONS=649} [2024-06-04 16:22:16,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 442 predicate places. [2024-06-04 16:22:16,733 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 649 transitions, 7940 flow [2024-06-04 16:22:16,733 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 16:22:16,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:16,733 INFO L208 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 16:22:16,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-04 16:22:16,734 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 16:22:16,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:16,734 INFO L85 PathProgramCache]: Analyzing trace with hash 760878703, now seen corresponding path program 1 times [2024-06-04 16:22:16,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:16,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010695572] [2024-06-04 16:22:16,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:16,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:16,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:16,996 INFO 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 16:22:16,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:16,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010695572] [2024-06-04 16:22:16,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010695572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:16,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:16,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:16,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934128471] [2024-06-04 16:22:16,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:16,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:16,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:16,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:16,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:17,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:22:17,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 649 transitions, 7940 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 16:22:17,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:17,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:22:17,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:18,650 INFO L124 PetriNetUnfolderBase]: 4058/6890 cut-off events. [2024-06-04 16:22:18,651 INFO L125 PetriNetUnfolderBase]: For 759490/759496 co-relation queries the response was YES. [2024-06-04 16:22:18,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46769 conditions, 6890 events. 4058/6890 cut-off events. For 759490/759496 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 48835 event pairs, 777 based on Foata normal form. 1/6884 useless extension candidates. Maximal degree in co-relation 46545. Up to 5647 conditions per place. [2024-06-04 16:22:18,780 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 401 selfloop transitions, 283 changer transitions 0/691 dead transitions. [2024-06-04 16:22:18,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 691 transitions, 9998 flow [2024-06-04 16:22:18,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:22:18,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:22:18,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-04 16:22:18,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 16:22:18,785 INFO L175 Difference]: Start difference. First operand has 485 places, 649 transitions, 7940 flow. Second operand 9 states and 222 transitions. [2024-06-04 16:22:18,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 691 transitions, 9998 flow [2024-06-04 16:22:23,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 691 transitions, 9746 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-04 16:22:23,082 INFO L231 Difference]: Finished difference. Result has 488 places, 658 transitions, 8366 flow [2024-06-04 16:22:23,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7692, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8366, PETRI_PLACES=488, PETRI_TRANSITIONS=658} [2024-06-04 16:22:23,083 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-04 16:22:23,083 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 658 transitions, 8366 flow [2024-06-04 16:22:23,083 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 16:22:23,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:23,083 INFO L208 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 16:22:23,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-04 16:22:23,084 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:23,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:23,084 INFO L85 PathProgramCache]: Analyzing trace with hash -760499375, now seen corresponding path program 2 times [2024-06-04 16:22:23,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:23,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284671349] [2024-06-04 16:22:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:23,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:23,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:23,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284671349] [2024-06-04 16:22:23,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284671349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:23,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:23,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:23,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388089951] [2024-06-04 16:22:23,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:23,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:23,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:23,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:23,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:23,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:22:23,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 658 transitions, 8366 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 16:22:23,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:23,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:22:23,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:25,172 INFO L124 PetriNetUnfolderBase]: 4071/6914 cut-off events. [2024-06-04 16:22:25,172 INFO L125 PetriNetUnfolderBase]: For 768888/768894 co-relation queries the response was YES. [2024-06-04 16:22:25,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47979 conditions, 6914 events. 4071/6914 cut-off events. For 768888/768894 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 49097 event pairs, 748 based on Foata normal form. 5/6914 useless extension candidates. Maximal degree in co-relation 47754. Up to 5991 conditions per place. [2024-06-04 16:22:25,297 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 504 selfloop transitions, 188 changer transitions 0/699 dead transitions. [2024-06-04 16:22:25,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 699 transitions, 10168 flow [2024-06-04 16:22:25,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:22:25,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:22:25,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 272 transitions. [2024-06-04 16:22:25,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-04 16:22:25,299 INFO L175 Difference]: Start difference. First operand has 488 places, 658 transitions, 8366 flow. Second operand 12 states and 272 transitions. [2024-06-04 16:22:25,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 699 transitions, 10168 flow [2024-06-04 16:22:29,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 699 transitions, 9845 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-04 16:22:29,765 INFO L231 Difference]: Finished difference. Result has 496 places, 664 transitions, 8507 flow [2024-06-04 16:22:29,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8075, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8507, PETRI_PLACES=496, PETRI_TRANSITIONS=664} [2024-06-04 16:22:29,765 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 453 predicate places. [2024-06-04 16:22:29,765 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 664 transitions, 8507 flow [2024-06-04 16:22:29,765 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 16:22:29,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:29,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:29,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-04 16:22:29,766 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:29,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:29,766 INFO L85 PathProgramCache]: Analyzing trace with hash -760504955, now seen corresponding path program 3 times [2024-06-04 16:22:29,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:29,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114303435] [2024-06-04 16:22:29,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:29,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:30,048 INFO 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 16:22:30,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:30,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114303435] [2024-06-04 16:22:30,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114303435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:30,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:30,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:30,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680283485] [2024-06-04 16:22:30,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:30,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:30,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:30,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:30,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:30,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:22:30,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 664 transitions, 8507 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 16:22:30,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:30,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:22:30,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:31,911 INFO L124 PetriNetUnfolderBase]: 4068/6910 cut-off events. [2024-06-04 16:22:31,911 INFO L125 PetriNetUnfolderBase]: For 771643/771649 co-relation queries the response was YES. [2024-06-04 16:22:32,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48244 conditions, 6910 events. 4068/6910 cut-off events. For 771643/771649 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 49005 event pairs, 748 based on Foata normal form. 5/6910 useless extension candidates. Maximal degree in co-relation 48017. Up to 5988 conditions per place. [2024-06-04 16:22:32,025 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 502 selfloop transitions, 187 changer transitions 0/696 dead transitions. [2024-06-04 16:22:32,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 696 transitions, 9965 flow [2024-06-04 16:22:32,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:22:32,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:22:32,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-04 16:22:32,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-04 16:22:32,026 INFO L175 Difference]: Start difference. First operand has 496 places, 664 transitions, 8507 flow. Second operand 10 states and 237 transitions. [2024-06-04 16:22:32,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 696 transitions, 9965 flow [2024-06-04 16:22:36,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 696 transitions, 9717 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-04 16:22:36,542 INFO L231 Difference]: Finished difference. Result has 498 places, 664 transitions, 8639 flow [2024-06-04 16:22:36,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8259, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8639, PETRI_PLACES=498, PETRI_TRANSITIONS=664} [2024-06-04 16:22:36,542 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 455 predicate places. [2024-06-04 16:22:36,542 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 664 transitions, 8639 flow [2024-06-04 16:22:36,542 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 16:22:36,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:36,543 INFO L208 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 16:22:36,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-04 16:22:36,543 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:36,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:36,543 INFO L85 PathProgramCache]: Analyzing trace with hash 55399983, now seen corresponding path program 4 times [2024-06-04 16:22:36,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:36,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193484020] [2024-06-04 16:22:36,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:36,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:36,822 INFO 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 16:22:36,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:36,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193484020] [2024-06-04 16:22:36,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193484020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:36,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:36,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:36,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625191289] [2024-06-04 16:22:36,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:36,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:36,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:36,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:36,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:36,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:22:36,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 664 transitions, 8639 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 16:22:36,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:36,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:22:36,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:38,791 INFO L124 PetriNetUnfolderBase]: 4089/6945 cut-off events. [2024-06-04 16:22:38,791 INFO L125 PetriNetUnfolderBase]: For 799664/799670 co-relation queries the response was YES. [2024-06-04 16:22:38,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49098 conditions, 6945 events. 4089/6945 cut-off events. For 799664/799670 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 49282 event pairs, 748 based on Foata normal form. 5/6945 useless extension candidates. Maximal degree in co-relation 48869. Up to 5996 conditions per place. [2024-06-04 16:22:38,912 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 502 selfloop transitions, 201 changer transitions 0/710 dead transitions. [2024-06-04 16:22:38,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 710 transitions, 10739 flow [2024-06-04 16:22:38,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:22:38,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:22:38,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 297 transitions. [2024-06-04 16:22:38,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439560439560439 [2024-06-04 16:22:38,913 INFO L175 Difference]: Start difference. First operand has 498 places, 664 transitions, 8639 flow. Second operand 13 states and 297 transitions. [2024-06-04 16:22:38,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 710 transitions, 10739 flow [2024-06-04 16:22:42,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 710 transitions, 10365 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-04 16:22:42,809 INFO L231 Difference]: Finished difference. Result has 503 places, 673 transitions, 8786 flow [2024-06-04 16:22:42,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8265, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8786, PETRI_PLACES=503, PETRI_TRANSITIONS=673} [2024-06-04 16:22:42,810 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 460 predicate places. [2024-06-04 16:22:42,810 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 673 transitions, 8786 flow [2024-06-04 16:22:42,824 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 16:22:42,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:42,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:22:42,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-04 16:22:42,824 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:42,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:42,825 INFO L85 PathProgramCache]: Analyzing trace with hash 435610449, now seen corresponding path program 5 times [2024-06-04 16:22:42,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:42,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922289141] [2024-06-04 16:22:42,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:42,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:43,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:43,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922289141] [2024-06-04 16:22:43,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922289141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:43,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:43,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:43,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464246686] [2024-06-04 16:22:43,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:43,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:43,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:43,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:43,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:43,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:22:43,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 673 transitions, 8786 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 16:22:43,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:43,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:22:43,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:45,102 INFO L124 PetriNetUnfolderBase]: 4094/6954 cut-off events. [2024-06-04 16:22:45,102 INFO L125 PetriNetUnfolderBase]: For 811304/811310 co-relation queries the response was YES. [2024-06-04 16:22:45,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49320 conditions, 6954 events. 4094/6954 cut-off events. For 811304/811310 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 49393 event pairs, 748 based on Foata normal form. 5/6954 useless extension candidates. Maximal degree in co-relation 49089. Up to 6002 conditions per place. [2024-06-04 16:22:45,673 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 503 selfloop transitions, 205 changer transitions 0/715 dead transitions. [2024-06-04 16:22:45,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 715 transitions, 10854 flow [2024-06-04 16:22:45,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-04 16:22:45,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-04 16:22:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 333 transitions. [2024-06-04 16:22:45,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-04 16:22:45,675 INFO L175 Difference]: Start difference. First operand has 503 places, 673 transitions, 8786 flow. Second operand 15 states and 333 transitions. [2024-06-04 16:22:45,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 715 transitions, 10854 flow [2024-06-04 16:22:49,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 715 transitions, 10438 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-04 16:22:49,880 INFO L231 Difference]: Finished difference. Result has 509 places, 676 transitions, 8820 flow [2024-06-04 16:22:49,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8380, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8820, PETRI_PLACES=509, PETRI_TRANSITIONS=676} [2024-06-04 16:22:49,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 466 predicate places. [2024-06-04 16:22:49,880 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 676 transitions, 8820 flow [2024-06-04 16:22:49,881 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 16:22:49,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:49,881 INFO L208 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 16:22:49,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-04 16:22:49,881 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:49,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:49,881 INFO L85 PathProgramCache]: Analyzing trace with hash 442962099, now seen corresponding path program 6 times [2024-06-04 16:22:49,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:49,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590242028] [2024-06-04 16:22:49,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:49,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:22:50,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:50,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590242028] [2024-06-04 16:22:50,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590242028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:50,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:50,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:22:50,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050956649] [2024-06-04 16:22:50,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:50,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:22:50,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:50,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:22:50,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:22:50,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:22:50,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 676 transitions, 8820 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 16:22:50,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:50,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:22:50,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:52,562 INFO L124 PetriNetUnfolderBase]: 4091/6950 cut-off events. [2024-06-04 16:22:52,563 INFO L125 PetriNetUnfolderBase]: For 814128/814134 co-relation queries the response was YES. [2024-06-04 16:22:52,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49243 conditions, 6950 events. 4091/6950 cut-off events. For 814128/814134 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 49328 event pairs, 748 based on Foata normal form. 5/6950 useless extension candidates. Maximal degree in co-relation 49011. Up to 6017 conditions per place. [2024-06-04 16:22:52,677 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 513 selfloop transitions, 188 changer transitions 0/708 dead transitions. [2024-06-04 16:22:52,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 708 transitions, 10564 flow [2024-06-04 16:22:52,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:22:52,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:22:52,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 269 transitions. [2024-06-04 16:22:52,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5337301587301587 [2024-06-04 16:22:52,678 INFO L175 Difference]: Start difference. First operand has 509 places, 676 transitions, 8820 flow. Second operand 12 states and 269 transitions. [2024-06-04 16:22:52,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 708 transitions, 10564 flow [2024-06-04 16:22:56,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 708 transitions, 10146 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-04 16:22:56,995 INFO L231 Difference]: Finished difference. Result has 508 places, 676 transitions, 8784 flow [2024-06-04 16:22:56,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8402, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8784, PETRI_PLACES=508, PETRI_TRANSITIONS=676} [2024-06-04 16:22:56,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 465 predicate places. [2024-06-04 16:22:56,995 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 676 transitions, 8784 flow [2024-06-04 16:22:56,995 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 16:22:56,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:22:56,995 INFO L208 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 16:22:56,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-04 16:22:56,996 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:22:56,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:22:56,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1522218733, now seen corresponding path program 7 times [2024-06-04 16:22:56,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:22:56,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139956360] [2024-06-04 16:22:56,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:22:56,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:22:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:22:57,252 INFO 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 16:22:57,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:22:57,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139956360] [2024-06-04 16:22:57,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139956360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:22:57,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:22:57,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:22:57,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581724367] [2024-06-04 16:22:57,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:22:57,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:22:57,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:22:57,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:22:57,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:22:57,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:22:57,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 676 transitions, 8784 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 16:22:57,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:22:57,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:22:57,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:22:59,446 INFO L124 PetriNetUnfolderBase]: 4104/6952 cut-off events. [2024-06-04 16:22:59,446 INFO L125 PetriNetUnfolderBase]: For 834080/834080 co-relation queries the response was YES. [2024-06-04 16:22:59,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49529 conditions, 6952 events. 4104/6952 cut-off events. For 834080/834080 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 49269 event pairs, 784 based on Foata normal form. 1/6945 useless extension candidates. Maximal degree in co-relation 49296. Up to 5907 conditions per place. [2024-06-04 16:22:59,570 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 477 selfloop transitions, 232 changer transitions 0/716 dead transitions. [2024-06-04 16:22:59,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 716 transitions, 10924 flow [2024-06-04 16:22:59,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:22:59,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:22:59,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-04 16:22:59,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-04 16:22:59,574 INFO L175 Difference]: Start difference. First operand has 508 places, 676 transitions, 8784 flow. Second operand 10 states and 237 transitions. [2024-06-04 16:22:59,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 716 transitions, 10924 flow [2024-06-04 16:23:04,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 716 transitions, 10524 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-04 16:23:04,364 INFO L231 Difference]: Finished difference. Result has 507 places, 685 transitions, 8974 flow [2024-06-04 16:23:04,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8384, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8974, PETRI_PLACES=507, PETRI_TRANSITIONS=685} [2024-06-04 16:23:04,365 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 464 predicate places. [2024-06-04 16:23:04,365 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 685 transitions, 8974 flow [2024-06-04 16:23:04,365 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 16:23:04,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:04,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:04,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-04 16:23:04,365 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:04,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:04,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1811144765, now seen corresponding path program 8 times [2024-06-04 16:23:04,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:04,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232248278] [2024-06-04 16:23:04,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:04,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:04,659 INFO 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 16:23:04,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:04,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232248278] [2024-06-04 16:23:04,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232248278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:04,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:04,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:23:04,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441541190] [2024-06-04 16:23:04,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:04,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:23:04,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:04,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:23:04,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:23:04,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:23:04,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 685 transitions, 8974 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 16:23:04,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:04,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:23:04,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:06,942 INFO L124 PetriNetUnfolderBase]: 4125/6987 cut-off events. [2024-06-04 16:23:06,943 INFO L125 PetriNetUnfolderBase]: For 867633/867633 co-relation queries the response was YES. [2024-06-04 16:23:07,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50863 conditions, 6987 events. 4125/6987 cut-off events. For 867633/867633 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 49640 event pairs, 784 based on Foata normal form. 1/6980 useless extension candidates. Maximal degree in co-relation 50629. Up to 5587 conditions per place. [2024-06-04 16:23:07,073 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 338 selfloop transitions, 387 changer transitions 0/732 dead transitions. [2024-06-04 16:23:07,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 732 transitions, 11452 flow [2024-06-04 16:23:07,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:23:07,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:23:07,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 299 transitions. [2024-06-04 16:23:07,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:23:07,078 INFO L175 Difference]: Start difference. First operand has 507 places, 685 transitions, 8974 flow. Second operand 13 states and 299 transitions. [2024-06-04 16:23:07,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 732 transitions, 11452 flow [2024-06-04 16:23:12,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 732 transitions, 11062 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-04 16:23:12,959 INFO L231 Difference]: Finished difference. Result has 515 places, 694 transitions, 9496 flow [2024-06-04 16:23:12,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8650, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9496, PETRI_PLACES=515, PETRI_TRANSITIONS=694} [2024-06-04 16:23:12,960 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 472 predicate places. [2024-06-04 16:23:12,960 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 694 transitions, 9496 flow [2024-06-04 16:23:12,960 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 16:23:12,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:12,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:12,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-04 16:23:12,960 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:12,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:12,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2127017405, now seen corresponding path program 9 times [2024-06-04 16:23:12,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:12,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543806258] [2024-06-04 16:23:12,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:12,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:13,232 INFO 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 16:23:13,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:13,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543806258] [2024-06-04 16:23:13,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543806258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:13,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:13,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:23:13,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676253074] [2024-06-04 16:23:13,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:13,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:23:13,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:13,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:23:13,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:23:13,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:23:13,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 694 transitions, 9496 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 16:23:13,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:13,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:23:13,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:15,325 INFO L124 PetriNetUnfolderBase]: 4122/6983 cut-off events. [2024-06-04 16:23:15,325 INFO L125 PetriNetUnfolderBase]: For 871205/871205 co-relation queries the response was YES. [2024-06-04 16:23:15,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51507 conditions, 6983 events. 4122/6983 cut-off events. For 871205/871205 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 49629 event pairs, 784 based on Foata normal form. 1/6976 useless extension candidates. Maximal degree in co-relation 51271. Up to 5584 conditions per place. [2024-06-04 16:23:15,592 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 341 selfloop transitions, 383 changer transitions 0/731 dead transitions. [2024-06-04 16:23:15,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 731 transitions, 11844 flow [2024-06-04 16:23:15,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:23:15,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:23:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 283 transitions. [2024-06-04 16:23:15,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615079365079365 [2024-06-04 16:23:15,593 INFO L175 Difference]: Start difference. First operand has 515 places, 694 transitions, 9496 flow. Second operand 12 states and 283 transitions. [2024-06-04 16:23:15,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 731 transitions, 11844 flow [2024-06-04 16:23:21,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 731 transitions, 11153 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-04 16:23:21,115 INFO L231 Difference]: Finished difference. Result has 518 places, 694 transitions, 9577 flow [2024-06-04 16:23:21,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8805, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9577, PETRI_PLACES=518, PETRI_TRANSITIONS=694} [2024-06-04 16:23:21,115 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 475 predicate places. [2024-06-04 16:23:21,115 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 694 transitions, 9577 flow [2024-06-04 16:23:21,116 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 16:23:21,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:21,116 INFO L208 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 16:23:21,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-04 16:23:21,116 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:21,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:21,116 INFO L85 PathProgramCache]: Analyzing trace with hash 275307267, now seen corresponding path program 10 times [2024-06-04 16:23:21,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:21,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856361627] [2024-06-04 16:23:21,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:21,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:21,414 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 16:23:21,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:21,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856361627] [2024-06-04 16:23:21,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856361627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:21,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:21,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:23:21,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696515894] [2024-06-04 16:23:21,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:21,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:23:21,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:21,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:23:21,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:23:21,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:23:21,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 694 transitions, 9577 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 16:23:21,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:21,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:23:21,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:23,576 INFO L124 PetriNetUnfolderBase]: 4119/6979 cut-off events. [2024-06-04 16:23:23,577 INFO L125 PetriNetUnfolderBase]: For 874428/874428 co-relation queries the response was YES. [2024-06-04 16:23:23,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51506 conditions, 6979 events. 4119/6979 cut-off events. For 874428/874428 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 49601 event pairs, 784 based on Foata normal form. 1/6972 useless extension candidates. Maximal degree in co-relation 51269. Up to 5581 conditions per place. [2024-06-04 16:23:23,730 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 367 selfloop transitions, 356 changer transitions 0/730 dead transitions. [2024-06-04 16:23:23,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 730 transitions, 12199 flow [2024-06-04 16:23:23,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:23:23,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:23:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-04 16:23:23,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-04 16:23:23,732 INFO L175 Difference]: Start difference. First operand has 518 places, 694 transitions, 9577 flow. Second operand 10 states and 246 transitions. [2024-06-04 16:23:23,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 730 transitions, 12199 flow [2024-06-04 16:23:29,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 730 transitions, 11451 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 16:23:29,467 INFO L231 Difference]: Finished difference. Result has 519 places, 694 transitions, 9547 flow [2024-06-04 16:23:29,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8829, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9547, PETRI_PLACES=519, PETRI_TRANSITIONS=694} [2024-06-04 16:23:29,468 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 476 predicate places. [2024-06-04 16:23:29,468 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 694 transitions, 9547 flow [2024-06-04 16:23:29,468 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 16:23:29,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:29,468 INFO L208 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 16:23:29,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-04 16:23:29,468 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:29,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:29,468 INFO L85 PathProgramCache]: Analyzing trace with hash 279031917, now seen corresponding path program 11 times [2024-06-04 16:23:29,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:29,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707415997] [2024-06-04 16:23:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:29,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:23:29,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:29,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707415997] [2024-06-04 16:23:29,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707415997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:29,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:29,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:23:29,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076914907] [2024-06-04 16:23:29,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:29,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:23:29,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:29,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:23:29,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:23:29,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:23:29,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 694 transitions, 9547 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 16:23:29,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:29,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:23:29,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:31,737 INFO L124 PetriNetUnfolderBase]: 4132/7009 cut-off events. [2024-06-04 16:23:31,738 INFO L125 PetriNetUnfolderBase]: For 895717/895717 co-relation queries the response was YES. [2024-06-04 16:23:31,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51767 conditions, 7009 events. 4132/7009 cut-off events. For 895717/895717 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 49849 event pairs, 751 based on Foata normal form. 1/7003 useless extension candidates. Maximal degree in co-relation 51529. Up to 6076 conditions per place. [2024-06-04 16:23:31,857 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 537 selfloop transitions, 188 changer transitions 0/732 dead transitions. [2024-06-04 16:23:31,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 732 transitions, 11411 flow [2024-06-04 16:23:31,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:23:31,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:23:31,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 269 transitions. [2024-06-04 16:23:31,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5337301587301587 [2024-06-04 16:23:31,858 INFO L175 Difference]: Start difference. First operand has 519 places, 694 transitions, 9547 flow. Second operand 12 states and 269 transitions. [2024-06-04 16:23:31,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 732 transitions, 11411 flow [2024-06-04 16:23:37,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 732 transitions, 10653 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-04 16:23:37,346 INFO L231 Difference]: Finished difference. Result has 521 places, 700 transitions, 9239 flow [2024-06-04 16:23:37,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8801, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9239, PETRI_PLACES=521, PETRI_TRANSITIONS=700} [2024-06-04 16:23:37,347 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 478 predicate places. [2024-06-04 16:23:37,347 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 700 transitions, 9239 flow [2024-06-04 16:23:37,347 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 16:23:37,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:37,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:23:37,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-04 16:23:37,347 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:37,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:37,348 INFO L85 PathProgramCache]: Analyzing trace with hash 279026337, now seen corresponding path program 12 times [2024-06-04 16:23:37,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:37,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183919935] [2024-06-04 16:23:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:37,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:37,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:23:37,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:37,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183919935] [2024-06-04 16:23:37,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183919935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:37,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:37,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:23:37,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500903627] [2024-06-04 16:23:37,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:37,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:23:37,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:37,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:23:37,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:23:37,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:23:37,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 700 transitions, 9239 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 16:23:37,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:37,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:23:37,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:39,720 INFO L124 PetriNetUnfolderBase]: 4129/7005 cut-off events. [2024-06-04 16:23:39,721 INFO L125 PetriNetUnfolderBase]: For 896885/896885 co-relation queries the response was YES. [2024-06-04 16:23:39,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51274 conditions, 7005 events. 4129/7005 cut-off events. For 896885/896885 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 49836 event pairs, 751 based on Foata normal form. 1/6999 useless extension candidates. Maximal degree in co-relation 51035. Up to 6073 conditions per place. [2024-06-04 16:23:39,834 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 535 selfloop transitions, 187 changer transitions 0/729 dead transitions. [2024-06-04 16:23:39,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 729 transitions, 10755 flow [2024-06-04 16:23:39,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:23:39,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:23:39,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 234 transitions. [2024-06-04 16:23:39,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-04 16:23:39,835 INFO L175 Difference]: Start difference. First operand has 521 places, 700 transitions, 9239 flow. Second operand 10 states and 234 transitions. [2024-06-04 16:23:39,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 729 transitions, 10755 flow [2024-06-04 16:23:44,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 729 transitions, 10507 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-04 16:23:44,814 INFO L231 Difference]: Finished difference. Result has 523 places, 700 transitions, 9371 flow [2024-06-04 16:23:44,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8991, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9371, PETRI_PLACES=523, PETRI_TRANSITIONS=700} [2024-06-04 16:23:44,815 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 480 predicate places. [2024-06-04 16:23:44,815 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 700 transitions, 9371 flow [2024-06-04 16:23:44,815 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 16:23:44,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:44,815 INFO L208 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 16:23:44,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-04 16:23:44,816 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:44,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:44,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1000054067, now seen corresponding path program 13 times [2024-06-04 16:23:44,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:44,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201168258] [2024-06-04 16:23:44,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:44,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:45,111 INFO 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 16:23:45,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:45,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201168258] [2024-06-04 16:23:45,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201168258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:45,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:45,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:23:45,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861925542] [2024-06-04 16:23:45,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:45,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:23:45,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:45,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:23:45,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:23:45,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:23:45,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 700 transitions, 9371 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 16:23:45,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:45,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:23:45,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:47,108 INFO L124 PetriNetUnfolderBase]: 4158/7053 cut-off events. [2024-06-04 16:23:47,109 INFO L125 PetriNetUnfolderBase]: For 938061/938061 co-relation queries the response was YES. [2024-06-04 16:23:47,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52329 conditions, 7053 events. 4158/7053 cut-off events. For 938061/938061 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 50281 event pairs, 751 based on Foata normal form. 1/7047 useless extension candidates. Maximal degree in co-relation 52088. Up to 6061 conditions per place. [2024-06-04 16:23:47,229 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 507 selfloop transitions, 230 changer transitions 0/744 dead transitions. [2024-06-04 16:23:47,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 744 transitions, 11589 flow [2024-06-04 16:23:47,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 16:23:47,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 16:23:47,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 309 transitions. [2024-06-04 16:23:47,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5255102040816326 [2024-06-04 16:23:47,230 INFO L175 Difference]: Start difference. First operand has 523 places, 700 transitions, 9371 flow. Second operand 14 states and 309 transitions. [2024-06-04 16:23:47,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 744 transitions, 11589 flow [2024-06-04 16:23:53,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 744 transitions, 11215 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-04 16:23:53,760 INFO L231 Difference]: Finished difference. Result has 528 places, 712 transitions, 9587 flow [2024-06-04 16:23:53,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8997, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9587, PETRI_PLACES=528, PETRI_TRANSITIONS=712} [2024-06-04 16:23:53,761 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 485 predicate places. [2024-06-04 16:23:53,761 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 712 transitions, 9587 flow [2024-06-04 16:23:53,761 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 16:23:53,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:23:53,762 INFO L208 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 16:23:53,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-04 16:23:53,762 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:23:53,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:23:53,762 INFO L85 PathProgramCache]: Analyzing trace with hash 999846677, now seen corresponding path program 14 times [2024-06-04 16:23:53,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:23:53,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278831892] [2024-06-04 16:23:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:23:53,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:23:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:23:54,018 INFO 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 16:23:54,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:23:54,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278831892] [2024-06-04 16:23:54,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278831892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:23:54,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:23:54,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:23:54,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61680894] [2024-06-04 16:23:54,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:23:54,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:23:54,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:23:54,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:23:54,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:23:54,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:23:54,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 712 transitions, 9587 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 16:23:54,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:23:54,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:23:54,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:23:56,082 INFO L124 PetriNetUnfolderBase]: 4171/7075 cut-off events. [2024-06-04 16:23:56,082 INFO L125 PetriNetUnfolderBase]: For 960734/960734 co-relation queries the response was YES. [2024-06-04 16:23:56,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52796 conditions, 7075 events. 4171/7075 cut-off events. For 960734/960734 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 50487 event pairs, 751 based on Foata normal form. 1/7069 useless extension candidates. Maximal degree in co-relation 52554. Up to 6076 conditions per place. [2024-06-04 16:23:56,206 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 507 selfloop transitions, 237 changer transitions 0/751 dead transitions. [2024-06-04 16:23:56,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 751 transitions, 11781 flow [2024-06-04 16:23:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-04 16:23:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-04 16:23:56,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 325 transitions. [2024-06-04 16:23:56,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-04 16:23:56,208 INFO L175 Difference]: Start difference. First operand has 528 places, 712 transitions, 9587 flow. Second operand 15 states and 325 transitions. [2024-06-04 16:23:56,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 751 transitions, 11781 flow [2024-06-04 16:24:02,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 751 transitions, 11472 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-04 16:24:02,672 INFO L231 Difference]: Finished difference. Result has 534 places, 718 transitions, 9826 flow [2024-06-04 16:24:02,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9294, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9826, PETRI_PLACES=534, PETRI_TRANSITIONS=718} [2024-06-04 16:24:02,672 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 491 predicate places. [2024-06-04 16:24:02,673 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 718 transitions, 9826 flow [2024-06-04 16:24:02,673 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 16:24:02,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:24:02,673 INFO L208 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 16:24:02,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-04 16:24:02,673 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:24:02,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:24:02,673 INFO L85 PathProgramCache]: Analyzing trace with hash 994691687, now seen corresponding path program 15 times [2024-06-04 16:24:02,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:24:02,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604112395] [2024-06-04 16:24:02,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:24:02,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:24:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:24:02,915 INFO 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 16:24:02,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:24:02,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604112395] [2024-06-04 16:24:02,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604112395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:24:02,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:24:02,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:24:02,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147294751] [2024-06-04 16:24:02,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:24:02,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:24:02,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:24:02,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:24:02,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:24:02,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:24:02,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 718 transitions, 9826 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 16:24:02,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:24:02,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:24:02,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:24:04,866 INFO L124 PetriNetUnfolderBase]: 4168/7071 cut-off events. [2024-06-04 16:24:04,866 INFO L125 PetriNetUnfolderBase]: For 963690/963690 co-relation queries the response was YES. [2024-06-04 16:24:04,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53136 conditions, 7071 events. 4168/7071 cut-off events. For 963690/963690 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 50419 event pairs, 751 based on Foata normal form. 1/7065 useless extension candidates. Maximal degree in co-relation 52892. Up to 6073 conditions per place. [2024-06-04 16:24:05,202 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 508 selfloop transitions, 232 changer transitions 0/747 dead transitions. [2024-06-04 16:24:05,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 747 transitions, 11940 flow [2024-06-04 16:24:05,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:24:05,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:24:05,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-04 16:24:05,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2024-06-04 16:24:05,216 INFO L175 Difference]: Start difference. First operand has 534 places, 718 transitions, 9826 flow. Second operand 11 states and 255 transitions. [2024-06-04 16:24:05,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 747 transitions, 11940 flow [2024-06-04 16:24:11,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 747 transitions, 11506 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-04 16:24:11,713 INFO L231 Difference]: Finished difference. Result has 534 places, 718 transitions, 9862 flow [2024-06-04 16:24:11,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9392, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9862, PETRI_PLACES=534, PETRI_TRANSITIONS=718} [2024-06-04 16:24:11,714 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 491 predicate places. [2024-06-04 16:24:11,714 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 718 transitions, 9862 flow [2024-06-04 16:24:11,715 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 16:24:11,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:24:11,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:24:11,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-04 16:24:11,715 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:24:11,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:24:11,715 INFO L85 PathProgramCache]: Analyzing trace with hash 994305737, now seen corresponding path program 16 times [2024-06-04 16:24:11,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:24:11,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579186074] [2024-06-04 16:24:11,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:24:11,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:24:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:24:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:24:12,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:24:12,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579186074] [2024-06-04 16:24:12,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579186074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:24:12,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:24:12,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:24:12,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596414292] [2024-06-04 16:24:12,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:24:12,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:24:12,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:24:12,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:24:12,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:24:12,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:24:12,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 718 transitions, 9862 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 16:24:12,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:24:12,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:24:12,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:24:14,028 INFO L124 PetriNetUnfolderBase]: 4165/7067 cut-off events. [2024-06-04 16:24:14,029 INFO L125 PetriNetUnfolderBase]: For 966752/966752 co-relation queries the response was YES. [2024-06-04 16:24:14,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53079 conditions, 7067 events. 4165/7067 cut-off events. For 966752/966752 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 50395 event pairs, 751 based on Foata normal form. 1/7061 useless extension candidates. Maximal degree in co-relation 52834. Up to 6070 conditions per place. [2024-06-04 16:24:14,150 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 509 selfloop transitions, 230 changer transitions 0/746 dead transitions. [2024-06-04 16:24:14,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 746 transitions, 11692 flow [2024-06-04 16:24:14,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:24:14,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:24:14,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-04 16:24:14,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:24:14,151 INFO L175 Difference]: Start difference. First operand has 534 places, 718 transitions, 9862 flow. Second operand 11 states and 253 transitions. [2024-06-04 16:24:14,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 746 transitions, 11692 flow [2024-06-04 16:24:20,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 746 transitions, 11222 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-04 16:24:20,909 INFO L231 Difference]: Finished difference. Result has 535 places, 718 transitions, 9858 flow [2024-06-04 16:24:20,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9392, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9858, PETRI_PLACES=535, PETRI_TRANSITIONS=718} [2024-06-04 16:24:20,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 492 predicate places. [2024-06-04 16:24:20,910 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 718 transitions, 9858 flow [2024-06-04 16:24:20,910 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 16:24:20,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:24:20,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:24:20,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-04 16:24:20,911 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:24:20,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:24:20,911 INFO L85 PathProgramCache]: Analyzing trace with hash 177155357, now seen corresponding path program 17 times [2024-06-04 16:24:20,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:24:20,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743193393] [2024-06-04 16:24:20,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:24:20,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:24:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:24:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:24:21,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:24:21,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743193393] [2024-06-04 16:24:21,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743193393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:24:21,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:24:21,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:24:21,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415862614] [2024-06-04 16:24:21,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:24:21,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:24:21,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:24:21,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:24:21,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:24:21,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:24:21,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 718 transitions, 9858 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 16:24:21,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:24:21,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:24:21,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:24:23,276 INFO L124 PetriNetUnfolderBase]: 4162/7063 cut-off events. [2024-06-04 16:24:23,276 INFO L125 PetriNetUnfolderBase]: For 969372/969372 co-relation queries the response was YES. [2024-06-04 16:24:23,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53003 conditions, 7063 events. 4162/7063 cut-off events. For 969372/969372 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 50413 event pairs, 751 based on Foata normal form. 1/7057 useless extension candidates. Maximal degree in co-relation 52757. Up to 6067 conditions per place. [2024-06-04 16:24:23,401 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 510 selfloop transitions, 232 changer transitions 0/749 dead transitions. [2024-06-04 16:24:23,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 749 transitions, 11702 flow [2024-06-04 16:24:23,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 16:24:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 16:24:23,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 308 transitions. [2024-06-04 16:24:23,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-04 16:24:23,402 INFO L175 Difference]: Start difference. First operand has 535 places, 718 transitions, 9858 flow. Second operand 14 states and 308 transitions. [2024-06-04 16:24:23,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 749 transitions, 11702 flow [2024-06-04 16:24:30,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 749 transitions, 11289 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-04 16:24:30,034 INFO L231 Difference]: Finished difference. Result has 541 places, 718 transitions, 9915 flow [2024-06-04 16:24:30,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9445, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9915, PETRI_PLACES=541, PETRI_TRANSITIONS=718} [2024-06-04 16:24:30,035 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 498 predicate places. [2024-06-04 16:24:30,035 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 718 transitions, 9915 flow [2024-06-04 16:24:30,035 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 16:24:30,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:24:30,035 INFO L208 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 16:24:30,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-04 16:24:30,035 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:24:30,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:24:30,036 INFO L85 PathProgramCache]: Analyzing trace with hash 177149777, now seen corresponding path program 18 times [2024-06-04 16:24:30,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:24:30,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876482361] [2024-06-04 16:24:30,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:24:30,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:24:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:24:30,326 INFO 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 16:24:30,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:24:30,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876482361] [2024-06-04 16:24:30,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876482361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:24:30,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:24:30,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:24:30,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984972550] [2024-06-04 16:24:30,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:24:30,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:24:30,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:24:30,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:24:30,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:24:30,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:24:30,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 718 transitions, 9915 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 16:24:30,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:24:30,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:24:30,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:24:32,267 INFO L124 PetriNetUnfolderBase]: 4159/7059 cut-off events. [2024-06-04 16:24:32,267 INFO L125 PetriNetUnfolderBase]: For 972034/972034 co-relation queries the response was YES. [2024-06-04 16:24:32,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52957 conditions, 7059 events. 4159/7059 cut-off events. For 972034/972034 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 50304 event pairs, 751 based on Foata normal form. 1/7053 useless extension candidates. Maximal degree in co-relation 52710. Up to 6064 conditions per place. [2024-06-04 16:24:32,598 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 510 selfloop transitions, 230 changer transitions 0/747 dead transitions. [2024-06-04 16:24:32,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 747 transitions, 11465 flow [2024-06-04 16:24:32,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:24:32,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:24:32,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 290 transitions. [2024-06-04 16:24:32,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311355311355311 [2024-06-04 16:24:32,600 INFO L175 Difference]: Start difference. First operand has 541 places, 718 transitions, 9915 flow. Second operand 13 states and 290 transitions. [2024-06-04 16:24:32,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 747 transitions, 11465 flow [2024-06-04 16:24:37,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 747 transitions, 10779 flow, removed 7 selfloop flow, removed 15 redundant places. [2024-06-04 16:24:37,513 INFO L231 Difference]: Finished difference. Result has 539 places, 718 transitions, 9695 flow [2024-06-04 16:24:37,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9229, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9695, PETRI_PLACES=539, PETRI_TRANSITIONS=718} [2024-06-04 16:24:37,514 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 496 predicate places. [2024-06-04 16:24:37,514 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 718 transitions, 9695 flow [2024-06-04 16:24:37,514 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 16:24:37,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:24:37,514 INFO L208 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 16:24:37,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-04 16:24:37,515 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:24:37,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:24:37,515 INFO L85 PathProgramCache]: Analyzing trace with hash -2055341479, now seen corresponding path program 19 times [2024-06-04 16:24:37,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:24:37,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769607576] [2024-06-04 16:24:37,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:24:37,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:24:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:24:37,801 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 16:24:37,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:24:37,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769607576] [2024-06-04 16:24:37,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769607576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:24:37,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:24:37,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:24:37,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709518230] [2024-06-04 16:24:37,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:24:37,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:24:37,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:24:37,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:24:37,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:24:37,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:24:37,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 718 transitions, 9695 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 16:24:37,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:24:37,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:24:37,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:24:39,961 INFO L124 PetriNetUnfolderBase]: 4180/7106 cut-off events. [2024-06-04 16:24:39,962 INFO L125 PetriNetUnfolderBase]: For 1006465/1006471 co-relation queries the response was YES. [2024-06-04 16:24:40,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53097 conditions, 7106 events. 4180/7106 cut-off events. For 1006465/1006471 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 50816 event pairs, 748 based on Foata normal form. 5/7106 useless extension candidates. Maximal degree in co-relation 52850. Up to 6202 conditions per place. [2024-06-04 16:24:40,106 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 611 selfloop transitions, 142 changer transitions 0/760 dead transitions. [2024-06-04 16:24:40,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 760 transitions, 11958 flow [2024-06-04 16:24:40,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-04 16:24:40,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-04 16:24:40,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 324 transitions. [2024-06-04 16:24:40,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-04 16:24:40,108 INFO L175 Difference]: Start difference. First operand has 539 places, 718 transitions, 9695 flow. Second operand 15 states and 324 transitions. [2024-06-04 16:24:40,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 760 transitions, 11958 flow [2024-06-04 16:24:46,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 760 transitions, 11447 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-04 16:24:46,554 INFO L231 Difference]: Finished difference. Result has 541 places, 727 transitions, 9585 flow [2024-06-04 16:24:46,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9184, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9585, PETRI_PLACES=541, PETRI_TRANSITIONS=727} [2024-06-04 16:24:46,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 498 predicate places. [2024-06-04 16:24:46,555 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 727 transitions, 9585 flow [2024-06-04 16:24:46,555 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 16:24:46,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:24:46,555 INFO L208 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 16:24:46,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-04 16:24:46,555 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:24:46,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:24:46,556 INFO L85 PathProgramCache]: Analyzing trace with hash -2143211985, now seen corresponding path program 20 times [2024-06-04 16:24:46,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:24:46,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796232188] [2024-06-04 16:24:46,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:24:46,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:24:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:24:46,848 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 16:24:46,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:24:46,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796232188] [2024-06-04 16:24:46,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796232188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:24:46,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:24:46,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:24:46,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579006644] [2024-06-04 16:24:46,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:24:46,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:24:46,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:24:46,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:24:46,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:24:46,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:24:46,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 727 transitions, 9585 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 16:24:46,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:24:46,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:24:46,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:24:48,997 INFO L124 PetriNetUnfolderBase]: 4193/7128 cut-off events. [2024-06-04 16:24:48,998 INFO L125 PetriNetUnfolderBase]: For 1029593/1029599 co-relation queries the response was YES. [2024-06-04 16:24:49,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53265 conditions, 7128 events. 4193/7128 cut-off events. For 1029593/1029599 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 51000 event pairs, 748 based on Foata normal form. 5/7128 useless extension candidates. Maximal degree in co-relation 53017. Up to 6116 conditions per place. [2024-06-04 16:24:49,123 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 548 selfloop transitions, 214 changer transitions 0/769 dead transitions. [2024-06-04 16:24:49,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 769 transitions, 12145 flow [2024-06-04 16:24:49,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 16:24:49,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 16:24:49,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 316 transitions. [2024-06-04 16:24:49,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374149659863946 [2024-06-04 16:24:49,124 INFO L175 Difference]: Start difference. First operand has 541 places, 727 transitions, 9585 flow. Second operand 14 states and 316 transitions. [2024-06-04 16:24:49,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 769 transitions, 12145 flow [2024-06-04 16:24:56,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 769 transitions, 11938 flow, removed 25 selfloop flow, removed 10 redundant places. [2024-06-04 16:24:56,124 INFO L231 Difference]: Finished difference. Result has 545 places, 733 transitions, 9892 flow [2024-06-04 16:24:56,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9378, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9892, PETRI_PLACES=545, PETRI_TRANSITIONS=733} [2024-06-04 16:24:56,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 502 predicate places. [2024-06-04 16:24:56,124 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 733 transitions, 9892 flow [2024-06-04 16:24:56,124 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 16:24:56,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:24:56,125 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, 1] [2024-06-04 16:24:56,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-04 16:24:56,125 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:24:56,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:24:56,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1089778609, now seen corresponding path program 21 times [2024-06-04 16:24:56,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:24:56,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157809033] [2024-06-04 16:24:56,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:24:56,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:24:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:24:56,452 INFO 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 16:24:56,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:24:56,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157809033] [2024-06-04 16:24:56,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157809033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:24:56,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:24:56,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:24:56,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581840716] [2024-06-04 16:24:56,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:24:56,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:24:56,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:24:56,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:24:56,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:24:56,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:24:56,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 733 transitions, 9892 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 16:24:56,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:24:56,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:24:56,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:24:58,547 INFO L124 PetriNetUnfolderBase]: 4214/7163 cut-off events. [2024-06-04 16:24:58,547 INFO L125 PetriNetUnfolderBase]: For 1064937/1064943 co-relation queries the response was YES. [2024-06-04 16:24:58,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54230 conditions, 7163 events. 4214/7163 cut-off events. For 1064937/1064943 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 51275 event pairs, 747 based on Foata normal form. 5/7163 useless extension candidates. Maximal degree in co-relation 53980. Up to 6140 conditions per place. [2024-06-04 16:24:58,685 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 548 selfloop transitions, 224 changer transitions 0/779 dead transitions. [2024-06-04 16:24:58,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 779 transitions, 12217 flow [2024-06-04 16:24:58,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-04 16:24:58,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-04 16:24:58,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 347 transitions. [2024-06-04 16:24:58,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163690476190477 [2024-06-04 16:24:58,686 INFO L175 Difference]: Start difference. First operand has 545 places, 733 transitions, 9892 flow. Second operand 16 states and 347 transitions. [2024-06-04 16:24:58,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 779 transitions, 12217 flow [2024-06-04 16:25:05,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 779 transitions, 11928 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-04 16:25:05,727 INFO L231 Difference]: Finished difference. Result has 553 places, 742 transitions, 10200 flow [2024-06-04 16:25:05,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9613, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10200, PETRI_PLACES=553, PETRI_TRANSITIONS=742} [2024-06-04 16:25:05,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 510 predicate places. [2024-06-04 16:25:05,727 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 742 transitions, 10200 flow [2024-06-04 16:25:05,727 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 16:25:05,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:25:05,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:25:05,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-04 16:25:05,728 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:25:05,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:25:05,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1599965915, now seen corresponding path program 22 times [2024-06-04 16:25:05,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:25:05,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138824274] [2024-06-04 16:25:05,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:25:05,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:25:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:25:06,035 INFO 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 16:25:06,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:25:06,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138824274] [2024-06-04 16:25:06,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138824274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:25:06,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:25:06,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:25:06,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114213383] [2024-06-04 16:25:06,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:25:06,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:25:06,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:25:06,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:25:06,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:25:06,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:25:06,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 742 transitions, 10200 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 16:25:06,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:25:06,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:25:06,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:25:08,275 INFO L124 PetriNetUnfolderBase]: 4211/7159 cut-off events. [2024-06-04 16:25:08,275 INFO L125 PetriNetUnfolderBase]: For 1067666/1067672 co-relation queries the response was YES. [2024-06-04 16:25:08,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54618 conditions, 7159 events. 4211/7159 cut-off events. For 1067666/1067672 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 51276 event pairs, 747 based on Foata normal form. 5/7159 useless extension candidates. Maximal degree in co-relation 54365. Up to 6137 conditions per place. [2024-06-04 16:25:08,401 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 550 selfloop transitions, 224 changer transitions 0/781 dead transitions. [2024-06-04 16:25:08,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 781 transitions, 12432 flow [2024-06-04 16:25:08,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-04 16:25:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-04 16:25:08,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 383 transitions. [2024-06-04 16:25:08,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066137566137566 [2024-06-04 16:25:08,405 INFO L175 Difference]: Start difference. First operand has 553 places, 742 transitions, 10200 flow. Second operand 18 states and 383 transitions. [2024-06-04 16:25:08,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 781 transitions, 12432 flow [2024-06-04 16:25:14,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 781 transitions, 12015 flow, removed 26 selfloop flow, removed 14 redundant places. [2024-06-04 16:25:14,815 INFO L231 Difference]: Finished difference. Result has 557 places, 742 transitions, 10237 flow [2024-06-04 16:25:14,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9783, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10237, PETRI_PLACES=557, PETRI_TRANSITIONS=742} [2024-06-04 16:25:14,815 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 514 predicate places. [2024-06-04 16:25:14,815 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 742 transitions, 10237 flow [2024-06-04 16:25:14,816 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 16:25:14,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:25:14,816 INFO L208 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 16:25:14,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-04 16:25:14,816 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:25:14,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:25:14,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1763001519, now seen corresponding path program 23 times [2024-06-04 16:25:14,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:25:14,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839241376] [2024-06-04 16:25:14,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:25:14,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:25:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:25:15,096 INFO 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 16:25:15,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:25:15,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839241376] [2024-06-04 16:25:15,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839241376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:25:15,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:25:15,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 16:25:15,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860472972] [2024-06-04 16:25:15,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:25:15,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 16:25:15,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:25:15,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 16:25:15,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 16:25:15,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:25:15,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 742 transitions, 10237 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 16:25:15,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:25:15,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:25:15,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand