./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe021_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/mutex-meet/safe021_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe021_tso.i ./goblint.2024-05-07_14-17-48.files/mutex-meet/safe021_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 10:40:08,917 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 10:40:08,989 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 10:40:08,998 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 10:40:08,998 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 10:40:09,029 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 10:40:09,031 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 10:40:09,031 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 10:40:09,032 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 10:40:09,036 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 10:40:09,036 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 10:40:09,037 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 10:40:09,037 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 10:40:09,037 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 10:40:09,038 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 10:40:09,038 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 10:40:09,038 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 10:40:09,039 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 10:40:09,039 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 10:40:09,039 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 10:40:09,039 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 10:40:09,040 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 10:40:09,040 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 10:40:09,040 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 10:40:09,041 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 10:40:09,041 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 10:40:09,041 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 10:40:09,042 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 10:40:09,042 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 10:40:09,042 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 10:40:09,043 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 10:40:09,044 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 10:40:09,044 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:40:09,044 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 10:40:09,044 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 10:40:09,044 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 10:40:09,045 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 10:40:09,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 10:40:09,045 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 10:40:09,045 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 10:40:09,045 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 10:40:09,046 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 10:40:09,046 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 10:40:09,046 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 10:40:09,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 10:40:09,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 10:40:09,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 10:40:09,330 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 10:40:09,330 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 10:40:09,331 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe021_tso.i [2024-05-12 10:40:10,456 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 10:40:10,685 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 10:40:10,686 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe021_tso.i [2024-05-12 10:40:10,702 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0043df369/3cf963a4531c4d3bb6aa097364226347/FLAG0e1e50691 [2024-05-12 10:40:10,713 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0043df369/3cf963a4531c4d3bb6aa097364226347 [2024-05-12 10:40:10,715 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 10:40:10,717 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 10:40:10,717 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/safe021_tso.yml/witness.yml [2024-05-12 10:40:10,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 10:40:10,874 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 10:40:10,877 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 10:40:10,877 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 10:40:10,881 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 10:40:10,882 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:40:10" (1/2) ... [2024-05-12 10:40:10,883 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dfe18a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:40:10, skipping insertion in model container [2024-05-12 10:40:10,883 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:40:10" (1/2) ... [2024-05-12 10:40:10,885 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2594cd8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:40:10, skipping insertion in model container [2024-05-12 10:40:10,885 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:40:10" (2/2) ... [2024-05-12 10:40:10,888 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dfe18a0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:10, skipping insertion in model container [2024-05-12 10:40:10,888 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:40:10" (2/2) ... [2024-05-12 10:40:10,888 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 10:40:10,950 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 10:40:10,951 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (1LL + (long long )x) - (long long )z >= 0LL) && (1LL + (long long )y) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && y <= 1) && z <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-05-12 10:40:10,951 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (1LL + (long long )x) - (long long )z >= 0LL) && (1LL + (long long )y) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && y <= 1) && z <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-05-12 10:40:10,952 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (1LL + (long long )x) - (long long )z >= 0LL) && (1LL + (long long )y) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )z >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && y <= 1) && z <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-05-12 10:40:10,952 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 10:40:10,952 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-05-12 10:40:10,996 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 10:40:11,168 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe021_tso.i[945,958] [2024-05-12 10:40:11,344 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:40:11,353 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 10:40:11,391 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe021_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 10:40:11,499 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:40:11,552 INFO L206 MainTranslator]: Completed translation [2024-05-12 10:40:11,553 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:11 WrapperNode [2024-05-12 10:40:11,553 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 10:40:11,554 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 10:40:11,555 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 10:40:11,555 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 10:40:11,561 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:11" (1/1) ... [2024-05-12 10:40:11,577 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:11" (1/1) ... [2024-05-12 10:40:11,608 INFO L138 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2024-05-12 10:40:11,609 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 10:40:11,609 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 10:40:11,610 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 10:40:11,610 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 10:40:11,619 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:11" (1/1) ... [2024-05-12 10:40:11,620 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:11" (1/1) ... [2024-05-12 10:40:11,623 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:11" (1/1) ... [2024-05-12 10:40:11,637 INFO L175 MemorySlicer]: Split 5 memory accesses to 4 slices as follows [2, 1, 1, 1]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-05-12 10:40:11,637 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:11" (1/1) ... [2024-05-12 10:40:11,637 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:11" (1/1) ... [2024-05-12 10:40:11,645 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:11" (1/1) ... [2024-05-12 10:40:11,646 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:11" (1/1) ... [2024-05-12 10:40:11,648 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:11" (1/1) ... [2024-05-12 10:40:11,650 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:11" (1/1) ... [2024-05-12 10:40:11,654 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 10:40:11,654 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 10:40:11,655 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 10:40:11,655 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 10:40:11,655 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:11" (1/1) ... [2024-05-12 10:40:11,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:40:11,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:40:11,685 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-05-12 10:40:11,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-05-12 10:40:11,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 10:40:11,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 10:40:11,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 10:40:11,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 10:40:11,724 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 10:40:11,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 10:40:11,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 10:40:11,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 10:40:11,724 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 10:40:11,724 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 10:40:11,725 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 10:40:11,725 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 10:40:11,726 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 10:40:11,726 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 10:40:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 10:40:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 10:40:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 10:40:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 10:40:11,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 10:40:11,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 10:40:11,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 10:40:11,730 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 10:40:11,887 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 10:40:11,889 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 10:40:12,302 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 10:40:12,302 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 10:40:12,379 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 10:40:12,380 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 10:40:12,380 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:40:12 BoogieIcfgContainer [2024-05-12 10:40:12,381 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 10:40:12,384 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 10:40:12,384 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 10:40:12,387 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 10:40:12,387 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 10:40:10" (1/4) ... [2024-05-12 10:40:12,388 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e169b12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:40:12, skipping insertion in model container [2024-05-12 10:40:12,388 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:40:10" (2/4) ... [2024-05-12 10:40:12,388 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e169b12 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:40:12, skipping insertion in model container [2024-05-12 10:40:12,389 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:40:11" (3/4) ... [2024-05-12 10:40:12,390 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e169b12 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:40:12, skipping insertion in model container [2024-05-12 10:40:12,390 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:40:12" (4/4) ... [2024-05-12 10:40:12,391 INFO L112 eAbstractionObserver]: Analyzing ICFG safe021_tso.i [2024-05-12 10:40:12,406 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 10:40:12,407 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-05-12 10:40:12,407 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 10:40:12,465 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 10:40:12,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 104 flow [2024-05-12 10:40:12,539 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2024-05-12 10:40:12,540 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:40:12,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 43 events. 1/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-05-12 10:40:12,543 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 104 flow [2024-05-12 10:40:12,547 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 40 transitions, 89 flow [2024-05-12 10:40:12,560 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 10:40:12,572 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;@b542146, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 10:40:12,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-05-12 10:40:12,577 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 10:40:12,577 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 10:40:12,577 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:40:12,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:12,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 10:40:12,579 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:12,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:12,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1708197830, now seen corresponding path program 1 times [2024-05-12 10:40:12,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:12,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685652514] [2024-05-12 10:40:12,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:12,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:13,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:13,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685652514] [2024-05-12 10:40:13,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685652514] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:13,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:13,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 10:40:13,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165152759] [2024-05-12 10:40:13,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:13,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 10:40:13,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:13,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 10:40:13,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 10:40:13,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 10:40:13,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:13,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:13,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 10:40:13,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:13,863 INFO L124 PetriNetUnfolderBase]: 946/1501 cut-off events. [2024-05-12 10:40:13,863 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-05-12 10:40:13,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3009 conditions, 1501 events. 946/1501 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8108 event pairs, 544 based on Foata normal form. 1/1445 useless extension candidates. Maximal degree in co-relation 2994. Up to 1429 conditions per place. [2024-05-12 10:40:13,881 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 34 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-05-12 10:40:13,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 195 flow [2024-05-12 10:40:13,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 10:40:13,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 10:40:13,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-05-12 10:40:13,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6884057971014492 [2024-05-12 10:40:13,894 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 89 flow. Second operand 3 states and 95 transitions. [2024-05-12 10:40:13,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 195 flow [2024-05-12 10:40:13,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 190 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 10:40:13,903 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 116 flow [2024-05-12 10:40:13,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-05-12 10:40:13,907 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-05-12 10:40:13,908 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 116 flow [2024-05-12 10:40:13,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:13,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:13,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:13,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 10:40:13,909 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:13,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:13,910 INFO L85 PathProgramCache]: Analyzing trace with hash -900565415, now seen corresponding path program 1 times [2024-05-12 10:40:13,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:13,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953199317] [2024-05-12 10:40:13,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:13,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:14,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:14,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953199317] [2024-05-12 10:40:14,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953199317] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:14,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:14,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:40:14,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454149530] [2024-05-12 10:40:14,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:14,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:40:14,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:14,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:40:14,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:40:14,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:40:14,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:14,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:14,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:40:14,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:14,609 INFO L124 PetriNetUnfolderBase]: 1237/2021 cut-off events. [2024-05-12 10:40:14,610 INFO L125 PetriNetUnfolderBase]: For 373/421 co-relation queries the response was YES. [2024-05-12 10:40:14,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4452 conditions, 2021 events. 1237/2021 cut-off events. For 373/421 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11345 event pairs, 640 based on Foata normal form. 3/1989 useless extension candidates. Maximal degree in co-relation 4437. Up to 1822 conditions per place. [2024-05-12 10:40:14,624 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 47 selfloop transitions, 7 changer transitions 0/67 dead transitions. [2024-05-12 10:40:14,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 67 transitions, 288 flow [2024-05-12 10:40:14,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:40:14,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:40:14,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-05-12 10:40:14,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-05-12 10:40:14,631 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 116 flow. Second operand 4 states and 122 transitions. [2024-05-12 10:40:14,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 67 transitions, 288 flow [2024-05-12 10:40:14,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 10:40:14,635 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 168 flow [2024-05-12 10:40:14,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-05-12 10:40:14,641 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2024-05-12 10:40:14,642 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 168 flow [2024-05-12 10:40:14,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:14,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:14,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:14,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 10:40:14,643 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:14,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:14,643 INFO L85 PathProgramCache]: Analyzing trace with hash 2147244585, now seen corresponding path program 1 times [2024-05-12 10:40:14,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:14,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032029888] [2024-05-12 10:40:14,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:14,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:14,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:14,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032029888] [2024-05-12 10:40:14,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032029888] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:14,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:14,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:40:14,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762025976] [2024-05-12 10:40:14,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:14,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:40:14,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:14,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:40:14,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:40:14,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:40:14,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:14,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:14,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:40:14,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:15,275 INFO L124 PetriNetUnfolderBase]: 1251/2069 cut-off events. [2024-05-12 10:40:15,276 INFO L125 PetriNetUnfolderBase]: For 969/972 co-relation queries the response was YES. [2024-05-12 10:40:15,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5028 conditions, 2069 events. 1251/2069 cut-off events. For 969/972 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11505 event pairs, 411 based on Foata normal form. 7/2071 useless extension candidates. Maximal degree in co-relation 5010. Up to 1754 conditions per place. [2024-05-12 10:40:15,292 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 62 selfloop transitions, 16 changer transitions 0/91 dead transitions. [2024-05-12 10:40:15,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 91 transitions, 450 flow [2024-05-12 10:40:15,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:40:15,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:40:15,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-05-12 10:40:15,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.691304347826087 [2024-05-12 10:40:15,297 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 168 flow. Second operand 5 states and 159 transitions. [2024-05-12 10:40:15,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 91 transitions, 450 flow [2024-05-12 10:40:15,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 91 transitions, 448 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-05-12 10:40:15,302 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 273 flow [2024-05-12 10:40:15,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2024-05-12 10:40:15,303 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 11 predicate places. [2024-05-12 10:40:15,304 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 273 flow [2024-05-12 10:40:15,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:15,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:15,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:15,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 10:40:15,305 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:15,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:15,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1917789224, now seen corresponding path program 1 times [2024-05-12 10:40:15,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:15,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299342385] [2024-05-12 10:40:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:15,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:15,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:15,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299342385] [2024-05-12 10:40:15,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299342385] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:15,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:15,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:40:15,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854644192] [2024-05-12 10:40:15,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:15,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:40:15,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:15,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:40:15,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:40:15,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:40:15,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 273 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:15,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:15,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:40:15,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:16,027 INFO L124 PetriNetUnfolderBase]: 1273/2101 cut-off events. [2024-05-12 10:40:16,027 INFO L125 PetriNetUnfolderBase]: For 2258/2271 co-relation queries the response was YES. [2024-05-12 10:40:16,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6079 conditions, 2101 events. 1273/2101 cut-off events. For 2258/2271 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11717 event pairs, 261 based on Foata normal form. 14/2110 useless extension candidates. Maximal degree in co-relation 6056. Up to 1720 conditions per place. [2024-05-12 10:40:16,043 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 68 selfloop transitions, 19 changer transitions 0/100 dead transitions. [2024-05-12 10:40:16,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 100 transitions, 571 flow [2024-05-12 10:40:16,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:16,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:16,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-05-12 10:40:16,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6702898550724637 [2024-05-12 10:40:16,045 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 273 flow. Second operand 6 states and 185 transitions. [2024-05-12 10:40:16,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 100 transitions, 571 flow [2024-05-12 10:40:16,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 100 transitions, 561 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-05-12 10:40:16,051 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 325 flow [2024-05-12 10:40:16,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=325, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-05-12 10:40:16,052 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 16 predicate places. [2024-05-12 10:40:16,052 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 325 flow [2024-05-12 10:40:16,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:16,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:16,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:16,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 10:40:16,053 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:16,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:16,053 INFO L85 PathProgramCache]: Analyzing trace with hash 903885866, now seen corresponding path program 1 times [2024-05-12 10:40:16,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:16,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167200568] [2024-05-12 10:40:16,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:16,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:16,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:16,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167200568] [2024-05-12 10:40:16,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167200568] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:16,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:16,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:40:16,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420480048] [2024-05-12 10:40:16,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:16,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:40:16,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:16,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:40:16,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:40:16,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 10:40:16,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 325 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:16,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:16,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 10:40:16,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:16,785 INFO L124 PetriNetUnfolderBase]: 1160/1943 cut-off events. [2024-05-12 10:40:16,789 INFO L125 PetriNetUnfolderBase]: For 3130/3143 co-relation queries the response was YES. [2024-05-12 10:40:16,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6008 conditions, 1943 events. 1160/1943 cut-off events. For 3130/3143 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11138 event pairs, 493 based on Foata normal form. 5/1884 useless extension candidates. Maximal degree in co-relation 5982. Up to 1667 conditions per place. [2024-05-12 10:40:16,804 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 49 selfloop transitions, 11 changer transitions 0/80 dead transitions. [2024-05-12 10:40:16,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 80 transitions, 497 flow [2024-05-12 10:40:16,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:40:16,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:40:16,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-05-12 10:40:16,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-05-12 10:40:16,807 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 325 flow. Second operand 4 states and 120 transitions. [2024-05-12 10:40:16,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 80 transitions, 497 flow [2024-05-12 10:40:16,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 80 transitions, 453 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 10:40:16,814 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 336 flow [2024-05-12 10:40:16,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-05-12 10:40:16,815 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 16 predicate places. [2024-05-12 10:40:16,815 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 336 flow [2024-05-12 10:40:16,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:16,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:16,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:16,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 10:40:16,816 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:16,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:16,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2044682512, now seen corresponding path program 1 times [2024-05-12 10:40:16,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:16,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782764264] [2024-05-12 10:40:16,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:16,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:17,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:17,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782764264] [2024-05-12 10:40:17,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782764264] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:17,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:17,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:40:17,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687933938] [2024-05-12 10:40:17,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:17,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:40:17,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:17,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:40:17,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:40:17,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:40:17,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 336 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:17,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:17,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:40:17,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:17,661 INFO L124 PetriNetUnfolderBase]: 1431/2345 cut-off events. [2024-05-12 10:40:17,661 INFO L125 PetriNetUnfolderBase]: For 4650/4668 co-relation queries the response was YES. [2024-05-12 10:40:17,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7507 conditions, 2345 events. 1431/2345 cut-off events. For 4650/4668 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13503 event pairs, 452 based on Foata normal form. 2/2306 useless extension candidates. Maximal degree in co-relation 7480. Up to 2041 conditions per place. [2024-05-12 10:40:17,679 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 66 selfloop transitions, 10 changer transitions 0/95 dead transitions. [2024-05-12 10:40:17,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 95 transitions, 597 flow [2024-05-12 10:40:17,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:40:17,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:40:17,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-05-12 10:40:17,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217391304347826 [2024-05-12 10:40:17,681 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 336 flow. Second operand 5 states and 143 transitions. [2024-05-12 10:40:17,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 95 transitions, 597 flow [2024-05-12 10:40:17,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 95 transitions, 567 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-05-12 10:40:17,688 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 415 flow [2024-05-12 10:40:17,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=415, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2024-05-12 10:40:17,691 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 21 predicate places. [2024-05-12 10:40:17,691 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 415 flow [2024-05-12 10:40:17,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:17,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:17,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:17,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 10:40:17,692 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:17,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:17,692 INFO L85 PathProgramCache]: Analyzing trace with hash 706670217, now seen corresponding path program 1 times [2024-05-12 10:40:17,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:17,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418348238] [2024-05-12 10:40:17,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:17,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:18,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:18,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418348238] [2024-05-12 10:40:18,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418348238] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:18,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:18,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:40:18,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627303307] [2024-05-12 10:40:18,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:18,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:40:18,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:18,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:40:18,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:40:18,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:40:18,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 415 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:18,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:18,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:40:18,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:18,474 INFO L124 PetriNetUnfolderBase]: 1497/2555 cut-off events. [2024-05-12 10:40:18,474 INFO L125 PetriNetUnfolderBase]: For 5388/5407 co-relation queries the response was YES. [2024-05-12 10:40:18,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8437 conditions, 2555 events. 1497/2555 cut-off events. For 5388/5407 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14891 event pairs, 485 based on Foata normal form. 10/2547 useless extension candidates. Maximal degree in co-relation 8407. Up to 2062 conditions per place. [2024-05-12 10:40:18,494 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 66 selfloop transitions, 21 changer transitions 0/103 dead transitions. [2024-05-12 10:40:18,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 103 transitions, 695 flow [2024-05-12 10:40:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:40:18,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:40:18,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-05-12 10:40:18,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6608695652173913 [2024-05-12 10:40:18,497 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 415 flow. Second operand 5 states and 152 transitions. [2024-05-12 10:40:18,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 103 transitions, 695 flow [2024-05-12 10:40:18,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 103 transitions, 689 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-05-12 10:40:18,505 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 483 flow [2024-05-12 10:40:18,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=483, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2024-05-12 10:40:18,505 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 26 predicate places. [2024-05-12 10:40:18,506 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 483 flow [2024-05-12 10:40:18,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:18,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:18,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:18,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 10:40:18,507 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:18,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:18,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1050963657, now seen corresponding path program 2 times [2024-05-12 10:40:18,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:18,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667812577] [2024-05-12 10:40:18,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:18,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:18,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:18,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667812577] [2024-05-12 10:40:18,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667812577] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:18,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:18,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:40:18,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325007657] [2024-05-12 10:40:18,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:18,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:40:18,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:18,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:40:18,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:40:18,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:40:18,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 483 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:18,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:18,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:40:18,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:19,209 INFO L124 PetriNetUnfolderBase]: 1507/2435 cut-off events. [2024-05-12 10:40:19,210 INFO L125 PetriNetUnfolderBase]: For 6342/6377 co-relation queries the response was YES. [2024-05-12 10:40:19,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8669 conditions, 2435 events. 1507/2435 cut-off events. For 6342/6377 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 13858 event pairs, 428 based on Foata normal form. 23/2439 useless extension candidates. Maximal degree in co-relation 8636. Up to 2075 conditions per place. [2024-05-12 10:40:19,257 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 60 selfloop transitions, 22 changer transitions 0/98 dead transitions. [2024-05-12 10:40:19,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 98 transitions, 697 flow [2024-05-12 10:40:19,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:40:19,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:40:19,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-05-12 10:40:19,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6434782608695652 [2024-05-12 10:40:19,259 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 483 flow. Second operand 5 states and 148 transitions. [2024-05-12 10:40:19,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 98 transitions, 697 flow [2024-05-12 10:40:19,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 98 transitions, 670 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-05-12 10:40:19,268 INFO L231 Difference]: Finished difference. Result has 79 places, 77 transitions, 509 flow [2024-05-12 10:40:19,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=509, PETRI_PLACES=79, PETRI_TRANSITIONS=77} [2024-05-12 10:40:19,269 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 29 predicate places. [2024-05-12 10:40:19,269 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 77 transitions, 509 flow [2024-05-12 10:40:19,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:19,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:19,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:19,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 10:40:19,270 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:19,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:19,271 INFO L85 PathProgramCache]: Analyzing trace with hash -692223183, now seen corresponding path program 1 times [2024-05-12 10:40:19,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:19,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276055569] [2024-05-12 10:40:19,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:19,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:19,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:19,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276055569] [2024-05-12 10:40:19,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276055569] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:19,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:19,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:40:19,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016088884] [2024-05-12 10:40:19,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:19,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:40:19,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:19,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:40:19,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:40:19,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:19,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 77 transitions, 509 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:19,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:19,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:19,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:20,077 INFO L124 PetriNetUnfolderBase]: 1611/2739 cut-off events. [2024-05-12 10:40:20,077 INFO L125 PetriNetUnfolderBase]: For 7898/7898 co-relation queries the response was YES. [2024-05-12 10:40:20,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9391 conditions, 2739 events. 1611/2739 cut-off events. For 7898/7898 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15939 event pairs, 530 based on Foata normal form. 4/2735 useless extension candidates. Maximal degree in co-relation 9357. Up to 2170 conditions per place. [2024-05-12 10:40:20,101 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 94 selfloop transitions, 22 changer transitions 0/128 dead transitions. [2024-05-12 10:40:20,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 128 transitions, 988 flow [2024-05-12 10:40:20,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:20,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:20,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-05-12 10:40:20,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-05-12 10:40:20,103 INFO L175 Difference]: Start difference. First operand has 79 places, 77 transitions, 509 flow. Second operand 6 states and 176 transitions. [2024-05-12 10:40:20,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 128 transitions, 988 flow [2024-05-12 10:40:20,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 128 transitions, 890 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:20,115 INFO L231 Difference]: Finished difference. Result has 82 places, 91 transitions, 609 flow [2024-05-12 10:40:20,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=609, PETRI_PLACES=82, PETRI_TRANSITIONS=91} [2024-05-12 10:40:20,116 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 32 predicate places. [2024-05-12 10:40:20,116 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 91 transitions, 609 flow [2024-05-12 10:40:20,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:20,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:20,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:20,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 10:40:20,117 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:20,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:20,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1390789017, now seen corresponding path program 2 times [2024-05-12 10:40:20,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:20,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585026879] [2024-05-12 10:40:20,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:20,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:20,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:20,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585026879] [2024-05-12 10:40:20,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585026879] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:20,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:20,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:40:20,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839512719] [2024-05-12 10:40:20,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:20,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:40:20,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:20,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:40:20,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:40:20,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:20,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 91 transitions, 609 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:20,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:20,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:20,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:20,916 INFO L124 PetriNetUnfolderBase]: 1628/2622 cut-off events. [2024-05-12 10:40:20,917 INFO L125 PetriNetUnfolderBase]: For 9379/9383 co-relation queries the response was YES. [2024-05-12 10:40:20,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10003 conditions, 2622 events. 1628/2622 cut-off events. For 9379/9383 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14857 event pairs, 569 based on Foata normal form. 3/2607 useless extension candidates. Maximal degree in co-relation 9967. Up to 2181 conditions per place. [2024-05-12 10:40:20,938 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 90 selfloop transitions, 31 changer transitions 0/133 dead transitions. [2024-05-12 10:40:20,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 133 transitions, 1071 flow [2024-05-12 10:40:20,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:20,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:20,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-05-12 10:40:20,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-05-12 10:40:20,940 INFO L175 Difference]: Start difference. First operand has 82 places, 91 transitions, 609 flow. Second operand 6 states and 176 transitions. [2024-05-12 10:40:20,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 133 transitions, 1071 flow [2024-05-12 10:40:20,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 133 transitions, 1033 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-05-12 10:40:20,956 INFO L231 Difference]: Finished difference. Result has 87 places, 100 transitions, 723 flow [2024-05-12 10:40:20,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=723, PETRI_PLACES=87, PETRI_TRANSITIONS=100} [2024-05-12 10:40:20,958 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 37 predicate places. [2024-05-12 10:40:20,958 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 100 transitions, 723 flow [2024-05-12 10:40:20,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:20,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:20,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:20,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 10:40:20,959 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:20,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:20,959 INFO L85 PathProgramCache]: Analyzing trace with hash -2140036687, now seen corresponding path program 3 times [2024-05-12 10:40:20,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:20,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389053450] [2024-05-12 10:40:20,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:20,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:21,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:21,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389053450] [2024-05-12 10:40:21,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389053450] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:21,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:21,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:40:21,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584697606] [2024-05-12 10:40:21,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:21,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:40:21,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:21,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:40:21,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:40:21,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:21,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 100 transitions, 723 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:21,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:21,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:21,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:21,759 INFO L124 PetriNetUnfolderBase]: 1623/2682 cut-off events. [2024-05-12 10:40:21,760 INFO L125 PetriNetUnfolderBase]: For 11021/11025 co-relation queries the response was YES. [2024-05-12 10:40:21,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10367 conditions, 2682 events. 1623/2682 cut-off events. For 11021/11025 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15393 event pairs, 502 based on Foata normal form. 3/2670 useless extension candidates. Maximal degree in co-relation 10329. Up to 2178 conditions per place. [2024-05-12 10:40:21,784 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 89 selfloop transitions, 30 changer transitions 0/131 dead transitions. [2024-05-12 10:40:21,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 131 transitions, 1081 flow [2024-05-12 10:40:21,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:21,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:21,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-05-12 10:40:21,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 10:40:21,786 INFO L175 Difference]: Start difference. First operand has 87 places, 100 transitions, 723 flow. Second operand 6 states and 174 transitions. [2024-05-12 10:40:21,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 131 transitions, 1081 flow [2024-05-12 10:40:21,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 131 transitions, 1069 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-05-12 10:40:21,807 INFO L231 Difference]: Finished difference. Result has 93 places, 100 transitions, 779 flow [2024-05-12 10:40:21,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=711, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=779, PETRI_PLACES=93, PETRI_TRANSITIONS=100} [2024-05-12 10:40:21,808 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 43 predicate places. [2024-05-12 10:40:21,808 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 100 transitions, 779 flow [2024-05-12 10:40:21,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:21,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:21,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:21,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 10:40:21,809 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:21,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:21,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2139790609, now seen corresponding path program 1 times [2024-05-12 10:40:21,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:21,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235497316] [2024-05-12 10:40:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:21,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:22,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:22,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:22,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235497316] [2024-05-12 10:40:22,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235497316] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:22,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:22,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:40:22,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659402726] [2024-05-12 10:40:22,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:22,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:40:22,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:22,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:40:22,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:40:22,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:40:22,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 100 transitions, 779 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:22,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:22,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:40:22,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:22,623 INFO L124 PetriNetUnfolderBase]: 1474/2472 cut-off events. [2024-05-12 10:40:22,623 INFO L125 PetriNetUnfolderBase]: For 12560/12560 co-relation queries the response was YES. [2024-05-12 10:40:22,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10026 conditions, 2472 events. 1474/2472 cut-off events. For 12560/12560 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14421 event pairs, 560 based on Foata normal form. 4/2463 useless extension candidates. Maximal degree in co-relation 9985. Up to 2059 conditions per place. [2024-05-12 10:40:22,647 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 98 selfloop transitions, 12 changer transitions 0/130 dead transitions. [2024-05-12 10:40:22,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 130 transitions, 1079 flow [2024-05-12 10:40:22,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:22,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:22,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-05-12 10:40:22,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6123188405797102 [2024-05-12 10:40:22,649 INFO L175 Difference]: Start difference. First operand has 93 places, 100 transitions, 779 flow. Second operand 6 states and 169 transitions. [2024-05-12 10:40:22,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 130 transitions, 1079 flow [2024-05-12 10:40:22,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 130 transitions, 1014 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-05-12 10:40:22,672 INFO L231 Difference]: Finished difference. Result has 95 places, 102 transitions, 763 flow [2024-05-12 10:40:22,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=763, PETRI_PLACES=95, PETRI_TRANSITIONS=102} [2024-05-12 10:40:22,674 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 45 predicate places. [2024-05-12 10:40:22,674 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 102 transitions, 763 flow [2024-05-12 10:40:22,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:22,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:22,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:22,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 10:40:22,675 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:22,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:22,676 INFO L85 PathProgramCache]: Analyzing trace with hash -491514323, now seen corresponding path program 1 times [2024-05-12 10:40:22,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:22,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777398882] [2024-05-12 10:40:22,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:22,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:22,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:23,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:23,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:23,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777398882] [2024-05-12 10:40:23,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777398882] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:23,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:23,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:40:23,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285673644] [2024-05-12 10:40:23,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:23,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:40:23,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:23,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:40:23,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:40:23,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:23,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 102 transitions, 763 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:23,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:23,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:23,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:23,457 INFO L124 PetriNetUnfolderBase]: 1654/2731 cut-off events. [2024-05-12 10:40:23,457 INFO L125 PetriNetUnfolderBase]: For 13983/13983 co-relation queries the response was YES. [2024-05-12 10:40:23,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11032 conditions, 2731 events. 1654/2731 cut-off events. For 13983/13983 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15939 event pairs, 644 based on Foata normal form. 2/2704 useless extension candidates. Maximal degree in co-relation 10990. Up to 2207 conditions per place. [2024-05-12 10:40:23,483 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 99 selfloop transitions, 33 changer transitions 0/144 dead transitions. [2024-05-12 10:40:23,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 144 transitions, 1265 flow [2024-05-12 10:40:23,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:23,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:23,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-05-12 10:40:23,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-05-12 10:40:23,485 INFO L175 Difference]: Start difference. First operand has 95 places, 102 transitions, 763 flow. Second operand 6 states and 177 transitions. [2024-05-12 10:40:23,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 144 transitions, 1265 flow [2024-05-12 10:40:23,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 144 transitions, 1234 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 10:40:23,511 INFO L231 Difference]: Finished difference. Result has 98 places, 109 transitions, 879 flow [2024-05-12 10:40:23,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=879, PETRI_PLACES=98, PETRI_TRANSITIONS=109} [2024-05-12 10:40:23,512 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 48 predicate places. [2024-05-12 10:40:23,512 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 109 transitions, 879 flow [2024-05-12 10:40:23,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:23,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:23,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:23,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 10:40:23,513 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:23,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:23,513 INFO L85 PathProgramCache]: Analyzing trace with hash -491519903, now seen corresponding path program 2 times [2024-05-12 10:40:23,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:23,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200642583] [2024-05-12 10:40:23,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:23,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:23,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:23,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200642583] [2024-05-12 10:40:23,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200642583] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:23,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:23,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:40:23,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038689774] [2024-05-12 10:40:23,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:23,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:40:23,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:23,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:40:23,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:40:23,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:23,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 109 transitions, 879 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:23,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:23,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:23,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:24,298 INFO L124 PetriNetUnfolderBase]: 1649/2724 cut-off events. [2024-05-12 10:40:24,298 INFO L125 PetriNetUnfolderBase]: For 15523/15523 co-relation queries the response was YES. [2024-05-12 10:40:24,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11332 conditions, 2724 events. 1649/2724 cut-off events. For 15523/15523 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15923 event pairs, 644 based on Foata normal form. 2/2697 useless extension candidates. Maximal degree in co-relation 11288. Up to 2202 conditions per place. [2024-05-12 10:40:24,326 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 97 selfloop transitions, 37 changer transitions 0/146 dead transitions. [2024-05-12 10:40:24,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 146 transitions, 1300 flow [2024-05-12 10:40:24,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:24,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-05-12 10:40:24,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-05-12 10:40:24,328 INFO L175 Difference]: Start difference. First operand has 98 places, 109 transitions, 879 flow. Second operand 6 states and 179 transitions. [2024-05-12 10:40:24,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 146 transitions, 1300 flow [2024-05-12 10:40:24,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 146 transitions, 1258 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-05-12 10:40:24,359 INFO L231 Difference]: Finished difference. Result has 103 places, 111 transitions, 959 flow [2024-05-12 10:40:24,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=959, PETRI_PLACES=103, PETRI_TRANSITIONS=111} [2024-05-12 10:40:24,360 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 53 predicate places. [2024-05-12 10:40:24,360 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 111 transitions, 959 flow [2024-05-12 10:40:24,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:24,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:24,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:24,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 10:40:24,361 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:24,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:24,362 INFO L85 PathProgramCache]: Analyzing trace with hash 666159409, now seen corresponding path program 3 times [2024-05-12 10:40:24,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:24,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603522059] [2024-05-12 10:40:24,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:24,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:24,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:24,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603522059] [2024-05-12 10:40:24,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603522059] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:24,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:24,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:40:24,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394874054] [2024-05-12 10:40:24,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:24,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:40:24,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:24,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:40:24,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:40:24,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:24,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 111 transitions, 959 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:24,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:24,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:24,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:25,099 INFO L124 PetriNetUnfolderBase]: 1644/2655 cut-off events. [2024-05-12 10:40:25,099 INFO L125 PetriNetUnfolderBase]: For 18089/18096 co-relation queries the response was YES. [2024-05-12 10:40:25,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11513 conditions, 2655 events. 1644/2655 cut-off events. For 18089/18096 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 15100 event pairs, 468 based on Foata normal form. 5/2644 useless extension candidates. Maximal degree in co-relation 11467. Up to 2197 conditions per place. [2024-05-12 10:40:25,127 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 94 selfloop transitions, 33 changer transitions 0/139 dead transitions. [2024-05-12 10:40:25,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 139 transitions, 1288 flow [2024-05-12 10:40:25,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:25,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:25,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-05-12 10:40:25,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6123188405797102 [2024-05-12 10:40:25,129 INFO L175 Difference]: Start difference. First operand has 103 places, 111 transitions, 959 flow. Second operand 6 states and 169 transitions. [2024-05-12 10:40:25,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 139 transitions, 1288 flow [2024-05-12 10:40:25,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 139 transitions, 1238 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-05-12 10:40:25,162 INFO L231 Difference]: Finished difference. Result has 106 places, 112 transitions, 994 flow [2024-05-12 10:40:25,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=994, PETRI_PLACES=106, PETRI_TRANSITIONS=112} [2024-05-12 10:40:25,163 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 56 predicate places. [2024-05-12 10:40:25,163 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 112 transitions, 994 flow [2024-05-12 10:40:25,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:25,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:25,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:25,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 10:40:25,164 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:25,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:25,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1234637516, now seen corresponding path program 1 times [2024-05-12 10:40:25,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:25,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041458459] [2024-05-12 10:40:25,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:25,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:25,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:25,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041458459] [2024-05-12 10:40:25,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041458459] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:25,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:25,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:40:25,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241605053] [2024-05-12 10:40:25,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:25,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:40:25,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:25,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:40:25,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:40:25,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:40:25,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 112 transitions, 994 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-05-12 10:40:25,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:25,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:40:25,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:25,940 INFO L124 PetriNetUnfolderBase]: 1560/2527 cut-off events. [2024-05-12 10:40:25,940 INFO L125 PetriNetUnfolderBase]: For 20919/20933 co-relation queries the response was YES. [2024-05-12 10:40:25,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11429 conditions, 2527 events. 1560/2527 cut-off events. For 20919/20933 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 14457 event pairs, 218 based on Foata normal form. 14/2458 useless extension candidates. Maximal degree in co-relation 11382. Up to 1936 conditions per place. [2024-05-12 10:40:25,966 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 93 selfloop transitions, 30 changer transitions 0/150 dead transitions. [2024-05-12 10:40:25,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 150 transitions, 1408 flow [2024-05-12 10:40:25,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:25,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:25,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-05-12 10:40:25,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-05-12 10:40:25,967 INFO L175 Difference]: Start difference. First operand has 106 places, 112 transitions, 994 flow. Second operand 6 states and 178 transitions. [2024-05-12 10:40:25,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 150 transitions, 1408 flow [2024-05-12 10:40:25,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 150 transitions, 1357 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-05-12 10:40:25,999 INFO L231 Difference]: Finished difference. Result has 109 places, 116 transitions, 1042 flow [2024-05-12 10:40:26,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1042, PETRI_PLACES=109, PETRI_TRANSITIONS=116} [2024-05-12 10:40:26,000 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 59 predicate places. [2024-05-12 10:40:26,000 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 116 transitions, 1042 flow [2024-05-12 10:40:26,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-05-12 10:40:26,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:26,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:26,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 10:40:26,001 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:26,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:26,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1054950500, now seen corresponding path program 2 times [2024-05-12 10:40:26,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:26,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609942478] [2024-05-12 10:40:26,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:26,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:26,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:26,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609942478] [2024-05-12 10:40:26,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609942478] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:26,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:26,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:40:26,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265381172] [2024-05-12 10:40:26,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:26,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:40:26,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:26,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:40:26,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:40:26,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:40:26,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 116 transitions, 1042 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-05-12 10:40:26,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:26,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:40:26,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:26,803 INFO L124 PetriNetUnfolderBase]: 1548/2505 cut-off events. [2024-05-12 10:40:26,803 INFO L125 PetriNetUnfolderBase]: For 23287/23314 co-relation queries the response was YES. [2024-05-12 10:40:26,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11615 conditions, 2505 events. 1548/2505 cut-off events. For 23287/23314 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14350 event pairs, 323 based on Foata normal form. 10/2429 useless extension candidates. Maximal degree in co-relation 11566. Up to 2034 conditions per place. [2024-05-12 10:40:26,828 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 89 selfloop transitions, 31 changer transitions 0/147 dead transitions. [2024-05-12 10:40:26,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 147 transitions, 1356 flow [2024-05-12 10:40:26,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:26,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:26,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-05-12 10:40:26,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-05-12 10:40:26,830 INFO L175 Difference]: Start difference. First operand has 109 places, 116 transitions, 1042 flow. Second operand 6 states and 176 transitions. [2024-05-12 10:40:26,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 147 transitions, 1356 flow [2024-05-12 10:40:26,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 147 transitions, 1313 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-05-12 10:40:26,867 INFO L231 Difference]: Finished difference. Result has 113 places, 116 transitions, 1069 flow [2024-05-12 10:40:26,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=999, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1069, PETRI_PLACES=113, PETRI_TRANSITIONS=116} [2024-05-12 10:40:26,868 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 63 predicate places. [2024-05-12 10:40:26,868 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 116 transitions, 1069 flow [2024-05-12 10:40:26,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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) [2024-05-12 10:40:26,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:26,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:26,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 10:40:26,869 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:26,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:26,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1942933464, now seen corresponding path program 1 times [2024-05-12 10:40:26,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:26,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290481349] [2024-05-12 10:40:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:26,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:27,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:27,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290481349] [2024-05-12 10:40:27,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290481349] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:27,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:27,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:27,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146600646] [2024-05-12 10:40:27,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:27,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:27,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:27,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:27,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:27,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:27,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 116 transitions, 1069 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:27,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:27,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:27,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:27,782 INFO L124 PetriNetUnfolderBase]: 1797/2896 cut-off events. [2024-05-12 10:40:27,782 INFO L125 PetriNetUnfolderBase]: For 26028/26028 co-relation queries the response was YES. [2024-05-12 10:40:27,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12862 conditions, 2896 events. 1797/2896 cut-off events. For 26028/26028 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16693 event pairs, 443 based on Foata normal form. 20/2902 useless extension candidates. Maximal degree in co-relation 12811. Up to 2278 conditions per place. [2024-05-12 10:40:27,805 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 109 selfloop transitions, 37 changer transitions 0/158 dead transitions. [2024-05-12 10:40:27,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 158 transitions, 1479 flow [2024-05-12 10:40:27,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:27,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:27,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-05-12 10:40:27,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273291925465838 [2024-05-12 10:40:27,808 INFO L175 Difference]: Start difference. First operand has 113 places, 116 transitions, 1069 flow. Second operand 7 states and 202 transitions. [2024-05-12 10:40:27,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 158 transitions, 1479 flow [2024-05-12 10:40:27,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 158 transitions, 1408 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:27,849 INFO L231 Difference]: Finished difference. Result has 115 places, 118 transitions, 1100 flow [2024-05-12 10:40:27,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=998, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1100, PETRI_PLACES=115, PETRI_TRANSITIONS=118} [2024-05-12 10:40:27,850 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 65 predicate places. [2024-05-12 10:40:27,850 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 118 transitions, 1100 flow [2024-05-12 10:40:27,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:27,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:27,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:27,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 10:40:27,851 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:27,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:27,852 INFO L85 PathProgramCache]: Analyzing trace with hash -823886508, now seen corresponding path program 2 times [2024-05-12 10:40:27,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:27,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140399818] [2024-05-12 10:40:27,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:27,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:28,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:28,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140399818] [2024-05-12 10:40:28,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140399818] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:28,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:28,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:28,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036723828] [2024-05-12 10:40:28,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:28,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:28,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:28,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:28,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:28,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:28,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 118 transitions, 1100 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:28,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:28,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:28,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:28,715 INFO L124 PetriNetUnfolderBase]: 1824/2911 cut-off events. [2024-05-12 10:40:28,715 INFO L125 PetriNetUnfolderBase]: For 26483/26487 co-relation queries the response was YES. [2024-05-12 10:40:28,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13395 conditions, 2911 events. 1824/2911 cut-off events. For 26483/26487 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16601 event pairs, 433 based on Foata normal form. 5/2899 useless extension candidates. Maximal degree in co-relation 13343. Up to 2451 conditions per place. [2024-05-12 10:40:28,741 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 101 selfloop transitions, 41 changer transitions 0/154 dead transitions. [2024-05-12 10:40:28,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 154 transitions, 1484 flow [2024-05-12 10:40:28,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:28,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:28,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-05-12 10:40:28,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6118012422360248 [2024-05-12 10:40:28,744 INFO L175 Difference]: Start difference. First operand has 115 places, 118 transitions, 1100 flow. Second operand 7 states and 197 transitions. [2024-05-12 10:40:28,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 154 transitions, 1484 flow [2024-05-12 10:40:28,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 154 transitions, 1404 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:28,791 INFO L231 Difference]: Finished difference. Result has 117 places, 120 transitions, 1133 flow [2024-05-12 10:40:28,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1133, PETRI_PLACES=117, PETRI_TRANSITIONS=120} [2024-05-12 10:40:28,791 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 67 predicate places. [2024-05-12 10:40:28,792 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 120 transitions, 1133 flow [2024-05-12 10:40:28,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:28,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:28,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:28,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 10:40:28,792 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:28,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:28,793 INFO L85 PathProgramCache]: Analyzing trace with hash 714127728, now seen corresponding path program 3 times [2024-05-12 10:40:28,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:28,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969646319] [2024-05-12 10:40:28,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:28,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:29,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:29,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969646319] [2024-05-12 10:40:29,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969646319] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:29,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:29,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:29,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427516148] [2024-05-12 10:40:29,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:29,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:29,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:29,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:29,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:29,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:29,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 120 transitions, 1133 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:29,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:29,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:29,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:29,624 INFO L124 PetriNetUnfolderBase]: 1851/2952 cut-off events. [2024-05-12 10:40:29,625 INFO L125 PetriNetUnfolderBase]: For 29285/29289 co-relation queries the response was YES. [2024-05-12 10:40:29,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13836 conditions, 2952 events. 1851/2952 cut-off events. For 29285/29289 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 16832 event pairs, 440 based on Foata normal form. 5/2940 useless extension candidates. Maximal degree in co-relation 13783. Up to 2492 conditions per place. [2024-05-12 10:40:29,651 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 104 selfloop transitions, 40 changer transitions 0/156 dead transitions. [2024-05-12 10:40:29,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 156 transitions, 1525 flow [2024-05-12 10:40:29,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:29,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:29,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-05-12 10:40:29,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6118012422360248 [2024-05-12 10:40:29,653 INFO L175 Difference]: Start difference. First operand has 117 places, 120 transitions, 1133 flow. Second operand 7 states and 197 transitions. [2024-05-12 10:40:29,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 156 transitions, 1525 flow [2024-05-12 10:40:29,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 156 transitions, 1430 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:29,707 INFO L231 Difference]: Finished difference. Result has 119 places, 122 transitions, 1153 flow [2024-05-12 10:40:29,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1153, PETRI_PLACES=119, PETRI_TRANSITIONS=122} [2024-05-12 10:40:29,708 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 69 predicate places. [2024-05-12 10:40:29,708 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 122 transitions, 1153 flow [2024-05-12 10:40:29,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:29,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:29,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:29,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 10:40:29,709 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:29,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:29,710 INFO L85 PathProgramCache]: Analyzing trace with hash 950599758, now seen corresponding path program 4 times [2024-05-12 10:40:29,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:29,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691604586] [2024-05-12 10:40:29,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:29,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:30,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:30,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691604586] [2024-05-12 10:40:30,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691604586] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:30,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:30,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:30,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670651730] [2024-05-12 10:40:30,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:30,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:30,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:30,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:30,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:30,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:30,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 122 transitions, 1153 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:30,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:30,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:30,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:30,552 INFO L124 PetriNetUnfolderBase]: 1843/3028 cut-off events. [2024-05-12 10:40:30,553 INFO L125 PetriNetUnfolderBase]: For 31709/31713 co-relation queries the response was YES. [2024-05-12 10:40:30,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14002 conditions, 3028 events. 1843/3028 cut-off events. For 31709/31713 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17898 event pairs, 573 based on Foata normal form. 5/2995 useless extension candidates. Maximal degree in co-relation 13948. Up to 2237 conditions per place. [2024-05-12 10:40:30,580 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 102 selfloop transitions, 48 changer transitions 0/162 dead transitions. [2024-05-12 10:40:30,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 162 transitions, 1577 flow [2024-05-12 10:40:30,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:30,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-05-12 10:40:30,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242236024844721 [2024-05-12 10:40:30,582 INFO L175 Difference]: Start difference. First operand has 119 places, 122 transitions, 1153 flow. Second operand 7 states and 201 transitions. [2024-05-12 10:40:30,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 162 transitions, 1577 flow [2024-05-12 10:40:30,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 162 transitions, 1480 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:30,633 INFO L231 Difference]: Finished difference. Result has 121 places, 124 transitions, 1191 flow [2024-05-12 10:40:30,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1191, PETRI_PLACES=121, PETRI_TRANSITIONS=124} [2024-05-12 10:40:30,634 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 71 predicate places. [2024-05-12 10:40:30,634 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 124 transitions, 1191 flow [2024-05-12 10:40:30,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:30,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:30,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:30,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 10:40:30,635 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:30,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:30,635 INFO L85 PathProgramCache]: Analyzing trace with hash -380941164, now seen corresponding path program 1 times [2024-05-12 10:40:30,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:30,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526691072] [2024-05-12 10:40:30,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:30,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:31,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:31,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526691072] [2024-05-12 10:40:31,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526691072] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:31,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:31,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:31,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336926983] [2024-05-12 10:40:31,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:31,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:31,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:31,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:31,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:31,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:31,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 124 transitions, 1191 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:31,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:31,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:31,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:31,492 INFO L124 PetriNetUnfolderBase]: 1997/3244 cut-off events. [2024-05-12 10:40:31,492 INFO L125 PetriNetUnfolderBase]: For 39262/39262 co-relation queries the response was YES. [2024-05-12 10:40:31,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15439 conditions, 3244 events. 1997/3244 cut-off events. For 39262/39262 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19363 event pairs, 356 based on Foata normal form. 12/3240 useless extension candidates. Maximal degree in co-relation 15384. Up to 2058 conditions per place. [2024-05-12 10:40:31,511 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 127 selfloop transitions, 38 changer transitions 0/177 dead transitions. [2024-05-12 10:40:31,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 177 transitions, 1786 flow [2024-05-12 10:40:31,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:31,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-05-12 10:40:31,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-05-12 10:40:31,513 INFO L175 Difference]: Start difference. First operand has 121 places, 124 transitions, 1191 flow. Second operand 7 states and 205 transitions. [2024-05-12 10:40:31,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 177 transitions, 1786 flow [2024-05-12 10:40:31,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 177 transitions, 1669 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:31,563 INFO L231 Difference]: Finished difference. Result has 125 places, 129 transitions, 1235 flow [2024-05-12 10:40:31,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1235, PETRI_PLACES=125, PETRI_TRANSITIONS=129} [2024-05-12 10:40:31,563 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 75 predicate places. [2024-05-12 10:40:31,564 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 129 transitions, 1235 flow [2024-05-12 10:40:31,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:31,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:31,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:31,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 10:40:31,564 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:31,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:31,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1656274372, now seen corresponding path program 2 times [2024-05-12 10:40:31,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:31,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020050135] [2024-05-12 10:40:31,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:31,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:31,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:31,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020050135] [2024-05-12 10:40:31,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020050135] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:31,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:31,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:31,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464537034] [2024-05-12 10:40:31,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:31,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:31,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:31,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:31,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:31,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:31,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 129 transitions, 1235 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:31,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:31,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:31,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:32,383 INFO L124 PetriNetUnfolderBase]: 2064/3339 cut-off events. [2024-05-12 10:40:32,383 INFO L125 PetriNetUnfolderBase]: For 42957/42957 co-relation queries the response was YES. [2024-05-12 10:40:32,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16074 conditions, 3339 events. 2064/3339 cut-off events. For 42957/42957 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19875 event pairs, 430 based on Foata normal form. 12/3344 useless extension candidates. Maximal degree in co-relation 16016. Up to 2582 conditions per place. [2024-05-12 10:40:32,404 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 124 selfloop transitions, 39 changer transitions 0/175 dead transitions. [2024-05-12 10:40:32,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 175 transitions, 1712 flow [2024-05-12 10:40:32,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:32,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 10:40:32,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-05-12 10:40:32,406 INFO L175 Difference]: Start difference. First operand has 125 places, 129 transitions, 1235 flow. Second operand 7 states and 204 transitions. [2024-05-12 10:40:32,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 175 transitions, 1712 flow [2024-05-12 10:40:32,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 175 transitions, 1657 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-05-12 10:40:32,469 INFO L231 Difference]: Finished difference. Result has 131 places, 132 transitions, 1314 flow [2024-05-12 10:40:32,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1314, PETRI_PLACES=131, PETRI_TRANSITIONS=132} [2024-05-12 10:40:32,470 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 81 predicate places. [2024-05-12 10:40:32,470 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 132 transitions, 1314 flow [2024-05-12 10:40:32,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:32,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:32,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:32,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 10:40:32,470 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:32,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:32,471 INFO L85 PathProgramCache]: Analyzing trace with hash 250484772, now seen corresponding path program 3 times [2024-05-12 10:40:32,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:32,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254228799] [2024-05-12 10:40:32,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:32,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:32,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:32,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254228799] [2024-05-12 10:40:32,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254228799] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:32,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:32,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:32,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118649582] [2024-05-12 10:40:32,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:32,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:32,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:32,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:32,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:32,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:32,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 132 transitions, 1314 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:32,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:32,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:32,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:33,395 INFO L124 PetriNetUnfolderBase]: 2218/3715 cut-off events. [2024-05-12 10:40:33,396 INFO L125 PetriNetUnfolderBase]: For 51500/51500 co-relation queries the response was YES. [2024-05-12 10:40:33,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17965 conditions, 3715 events. 2218/3715 cut-off events. For 51500/51500 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 23427 event pairs, 617 based on Foata normal form. 12/3691 useless extension candidates. Maximal degree in co-relation 17904. Up to 2756 conditions per place. [2024-05-12 10:40:33,419 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 130 selfloop transitions, 41 changer transitions 0/183 dead transitions. [2024-05-12 10:40:33,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 183 transitions, 1915 flow [2024-05-12 10:40:33,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:33,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:33,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-05-12 10:40:33,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6490683229813664 [2024-05-12 10:40:33,421 INFO L175 Difference]: Start difference. First operand has 131 places, 132 transitions, 1314 flow. Second operand 7 states and 209 transitions. [2024-05-12 10:40:33,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 183 transitions, 1915 flow [2024-05-12 10:40:33,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 183 transitions, 1856 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-05-12 10:40:33,492 INFO L231 Difference]: Finished difference. Result has 136 places, 135 transitions, 1400 flow [2024-05-12 10:40:33,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1400, PETRI_PLACES=136, PETRI_TRANSITIONS=135} [2024-05-12 10:40:33,492 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 86 predicate places. [2024-05-12 10:40:33,493 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 135 transitions, 1400 flow [2024-05-12 10:40:33,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:33,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:33,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:33,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 10:40:33,493 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:33,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:33,494 INFO L85 PathProgramCache]: Analyzing trace with hash 95818976, now seen corresponding path program 4 times [2024-05-12 10:40:33,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:33,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128850959] [2024-05-12 10:40:33,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:33,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:33,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:33,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128850959] [2024-05-12 10:40:33,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128850959] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:33,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:33,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:33,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076561031] [2024-05-12 10:40:33,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:33,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:33,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:33,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:33,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:33,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:33,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 135 transitions, 1400 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:33,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:33,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:33,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:34,407 INFO L124 PetriNetUnfolderBase]: 2312/3889 cut-off events. [2024-05-12 10:40:34,407 INFO L125 PetriNetUnfolderBase]: For 57759/57759 co-relation queries the response was YES. [2024-05-12 10:40:34,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19142 conditions, 3889 events. 2312/3889 cut-off events. For 57759/57759 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 24821 event pairs, 822 based on Foata normal form. 16/3863 useless extension candidates. Maximal degree in co-relation 19078. Up to 3133 conditions per place. [2024-05-12 10:40:34,431 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 128 selfloop transitions, 39 changer transitions 0/179 dead transitions. [2024-05-12 10:40:34,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 179 transitions, 1866 flow [2024-05-12 10:40:34,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:34,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:34,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 10:40:34,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-05-12 10:40:34,432 INFO L175 Difference]: Start difference. First operand has 136 places, 135 transitions, 1400 flow. Second operand 7 states and 204 transitions. [2024-05-12 10:40:34,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 179 transitions, 1866 flow [2024-05-12 10:40:34,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 179 transitions, 1803 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-05-12 10:40:34,501 INFO L231 Difference]: Finished difference. Result has 140 places, 136 transitions, 1446 flow [2024-05-12 10:40:34,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1446, PETRI_PLACES=140, PETRI_TRANSITIONS=136} [2024-05-12 10:40:34,502 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 90 predicate places. [2024-05-12 10:40:34,502 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 136 transitions, 1446 flow [2024-05-12 10:40:34,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:34,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:34,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:34,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 10:40:34,502 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:34,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:34,503 INFO L85 PathProgramCache]: Analyzing trace with hash 101181356, now seen corresponding path program 5 times [2024-05-12 10:40:34,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:34,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904701582] [2024-05-12 10:40:34,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:34,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:34,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:34,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:34,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904701582] [2024-05-12 10:40:34,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904701582] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:34,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:34,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:34,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611578601] [2024-05-12 10:40:34,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:34,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:34,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:34,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:34,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:34,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:34,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 136 transitions, 1446 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:34,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:34,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:34,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:35,351 INFO L124 PetriNetUnfolderBase]: 2406/3931 cut-off events. [2024-05-12 10:40:35,351 INFO L125 PetriNetUnfolderBase]: For 61646/61646 co-relation queries the response was YES. [2024-05-12 10:40:35,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19955 conditions, 3931 events. 2406/3931 cut-off events. For 61646/61646 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24559 event pairs, 602 based on Foata normal form. 16/3932 useless extension candidates. Maximal degree in co-relation 19889. Up to 3283 conditions per place. [2024-05-12 10:40:35,380 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 129 selfloop transitions, 36 changer transitions 0/177 dead transitions. [2024-05-12 10:40:35,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 177 transitions, 1900 flow [2024-05-12 10:40:35,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:35,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-05-12 10:40:35,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6211180124223602 [2024-05-12 10:40:35,382 INFO L175 Difference]: Start difference. First operand has 140 places, 136 transitions, 1446 flow. Second operand 7 states and 200 transitions. [2024-05-12 10:40:35,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 177 transitions, 1900 flow [2024-05-12 10:40:35,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 177 transitions, 1815 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:35,487 INFO L231 Difference]: Finished difference. Result has 142 places, 137 transitions, 1464 flow [2024-05-12 10:40:35,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1361, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1464, PETRI_PLACES=142, PETRI_TRANSITIONS=137} [2024-05-12 10:40:35,487 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 92 predicate places. [2024-05-12 10:40:35,488 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 137 transitions, 1464 flow [2024-05-12 10:40:35,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:35,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:35,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:35,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 10:40:35,488 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:35,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:35,489 INFO L85 PathProgramCache]: Analyzing trace with hash 101396558, now seen corresponding path program 1 times [2024-05-12 10:40:35,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:35,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935271112] [2024-05-12 10:40:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:35,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:35,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:35,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935271112] [2024-05-12 10:40:35,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935271112] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:35,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:35,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:35,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810694797] [2024-05-12 10:40:35,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:35,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:35,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:35,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:35,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:35,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:35,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 137 transitions, 1464 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:35,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:35,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:35,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:36,431 INFO L124 PetriNetUnfolderBase]: 2473/4179 cut-off events. [2024-05-12 10:40:36,431 INFO L125 PetriNetUnfolderBase]: For 65096/65096 co-relation queries the response was YES. [2024-05-12 10:40:36,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20646 conditions, 4179 events. 2473/4179 cut-off events. For 65096/65096 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 26919 event pairs, 654 based on Foata normal form. 12/4181 useless extension candidates. Maximal degree in co-relation 20579. Up to 2963 conditions per place. [2024-05-12 10:40:36,460 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 129 selfloop transitions, 40 changer transitions 0/181 dead transitions. [2024-05-12 10:40:36,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 181 transitions, 1935 flow [2024-05-12 10:40:36,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:36,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:36,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-05-12 10:40:36,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273291925465838 [2024-05-12 10:40:36,461 INFO L175 Difference]: Start difference. First operand has 142 places, 137 transitions, 1464 flow. Second operand 7 states and 202 transitions. [2024-05-12 10:40:36,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 181 transitions, 1935 flow [2024-05-12 10:40:36,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 181 transitions, 1854 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:36,555 INFO L231 Difference]: Finished difference. Result has 144 places, 138 transitions, 1493 flow [2024-05-12 10:40:36,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1383, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1493, PETRI_PLACES=144, PETRI_TRANSITIONS=138} [2024-05-12 10:40:36,556 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 94 predicate places. [2024-05-12 10:40:36,556 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 138 transitions, 1493 flow [2024-05-12 10:40:36,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:36,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:36,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:36,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 10:40:36,558 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:36,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:36,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1237878470, now seen corresponding path program 1 times [2024-05-12 10:40:36,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:36,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709858309] [2024-05-12 10:40:36,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:36,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:37,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:37,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709858309] [2024-05-12 10:40:37,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709858309] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:37,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:37,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:37,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921944972] [2024-05-12 10:40:37,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:37,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:37,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:37,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:37,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:37,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:37,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 138 transitions, 1493 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 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) [2024-05-12 10:40:37,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:37,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:37,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:37,677 INFO L124 PetriNetUnfolderBase]: 2484/4165 cut-off events. [2024-05-12 10:40:37,677 INFO L125 PetriNetUnfolderBase]: For 64604/64604 co-relation queries the response was YES. [2024-05-12 10:40:37,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20826 conditions, 4165 events. 2484/4165 cut-off events. For 64604/64604 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 26882 event pairs, 948 based on Foata normal form. 1/4126 useless extension candidates. Maximal degree in co-relation 20758. Up to 3701 conditions per place. [2024-05-12 10:40:37,702 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 135 selfloop transitions, 19 changer transitions 0/166 dead transitions. [2024-05-12 10:40:37,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 166 transitions, 1975 flow [2024-05-12 10:40:37,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:40:37,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:40:37,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-05-12 10:40:37,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217391304347826 [2024-05-12 10:40:37,703 INFO L175 Difference]: Start difference. First operand has 144 places, 138 transitions, 1493 flow. Second operand 5 states and 143 transitions. [2024-05-12 10:40:37,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 166 transitions, 1975 flow [2024-05-12 10:40:37,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 166 transitions, 1884 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:37,797 INFO L231 Difference]: Finished difference. Result has 144 places, 144 transitions, 1520 flow [2024-05-12 10:40:37,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1520, PETRI_PLACES=144, PETRI_TRANSITIONS=144} [2024-05-12 10:40:37,798 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 94 predicate places. [2024-05-12 10:40:37,798 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 144 transitions, 1520 flow [2024-05-12 10:40:37,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 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) [2024-05-12 10:40:37,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:37,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:37,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 10:40:37,799 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:37,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:37,800 INFO L85 PathProgramCache]: Analyzing trace with hash -862089738, now seen corresponding path program 6 times [2024-05-12 10:40:37,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:37,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789662972] [2024-05-12 10:40:37,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:37,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:38,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:38,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789662972] [2024-05-12 10:40:38,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789662972] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:38,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:38,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:38,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962210409] [2024-05-12 10:40:38,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:38,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:38,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:38,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:38,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:38,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:38,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 144 transitions, 1520 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:38,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:38,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:38,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:38,781 INFO L124 PetriNetUnfolderBase]: 2456/4023 cut-off events. [2024-05-12 10:40:38,781 INFO L125 PetriNetUnfolderBase]: For 66360/66369 co-relation queries the response was YES. [2024-05-12 10:40:38,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20034 conditions, 4023 events. 2456/4023 cut-off events. For 66360/66369 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25329 event pairs, 580 based on Foata normal form. 20/4025 useless extension candidates. Maximal degree in co-relation 19965. Up to 3363 conditions per place. [2024-05-12 10:40:38,811 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 136 selfloop transitions, 34 changer transitions 0/182 dead transitions. [2024-05-12 10:40:38,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 182 transitions, 1978 flow [2024-05-12 10:40:38,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:38,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:38,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-05-12 10:40:38,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-05-12 10:40:38,813 INFO L175 Difference]: Start difference. First operand has 144 places, 144 transitions, 1520 flow. Second operand 7 states and 196 transitions. [2024-05-12 10:40:38,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 182 transitions, 1978 flow [2024-05-12 10:40:38,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 182 transitions, 1922 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-05-12 10:40:38,925 INFO L231 Difference]: Finished difference. Result has 150 places, 145 transitions, 1565 flow [2024-05-12 10:40:38,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1474, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1565, PETRI_PLACES=150, PETRI_TRANSITIONS=145} [2024-05-12 10:40:38,926 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 100 predicate places. [2024-05-12 10:40:38,926 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 145 transitions, 1565 flow [2024-05-12 10:40:38,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:38,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:38,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:38,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 10:40:38,927 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:38,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:38,928 INFO L85 PathProgramCache]: Analyzing trace with hash 555424064, now seen corresponding path program 2 times [2024-05-12 10:40:38,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:38,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273111408] [2024-05-12 10:40:38,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:38,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:39,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:39,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273111408] [2024-05-12 10:40:39,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273111408] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:39,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:39,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:39,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843207319] [2024-05-12 10:40:39,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:39,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:39,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:39,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:39,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:39,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:39,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 145 transitions, 1565 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:39,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:39,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:39,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:39,907 INFO L124 PetriNetUnfolderBase]: 2436/4131 cut-off events. [2024-05-12 10:40:39,907 INFO L125 PetriNetUnfolderBase]: For 63098/63107 co-relation queries the response was YES. [2024-05-12 10:40:39,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19813 conditions, 4131 events. 2436/4131 cut-off events. For 63098/63107 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 26929 event pairs, 853 based on Foata normal form. 16/4095 useless extension candidates. Maximal degree in co-relation 19742. Up to 3206 conditions per place. [2024-05-12 10:40:40,004 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 137 selfloop transitions, 36 changer transitions 0/185 dead transitions. [2024-05-12 10:40:40,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 185 transitions, 2015 flow [2024-05-12 10:40:40,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:40,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:40,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-05-12 10:40:40,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180124223602484 [2024-05-12 10:40:40,005 INFO L175 Difference]: Start difference. First operand has 150 places, 145 transitions, 1565 flow. Second operand 7 states and 199 transitions. [2024-05-12 10:40:40,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 185 transitions, 2015 flow [2024-05-12 10:40:40,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 185 transitions, 1942 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:40,123 INFO L231 Difference]: Finished difference. Result has 152 places, 145 transitions, 1570 flow [2024-05-12 10:40:40,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1492, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1570, PETRI_PLACES=152, PETRI_TRANSITIONS=145} [2024-05-12 10:40:40,124 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 102 predicate places. [2024-05-12 10:40:40,124 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 145 transitions, 1570 flow [2024-05-12 10:40:40,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:40,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:40,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:40,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 10:40:40,124 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:40,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:40,125 INFO L85 PathProgramCache]: Analyzing trace with hash 495020626, now seen corresponding path program 3 times [2024-05-12 10:40:40,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:40,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625180923] [2024-05-12 10:40:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:40,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:40,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:40,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625180923] [2024-05-12 10:40:40,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625180923] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:40,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:40,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:40,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050620283] [2024-05-12 10:40:40,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:40,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:40,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:40,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:40,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:40,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:40,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 145 transitions, 1570 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:40,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:40,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:40,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:41,087 INFO L124 PetriNetUnfolderBase]: 2416/4043 cut-off events. [2024-05-12 10:40:41,087 INFO L125 PetriNetUnfolderBase]: For 60603/60612 co-relation queries the response was YES. [2024-05-12 10:40:41,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19355 conditions, 4043 events. 2416/4043 cut-off events. For 60603/60612 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 25946 event pairs, 690 based on Foata normal form. 16/4017 useless extension candidates. Maximal degree in co-relation 19283. Up to 2455 conditions per place. [2024-05-12 10:40:41,126 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 129 selfloop transitions, 44 changer transitions 0/185 dead transitions. [2024-05-12 10:40:41,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 185 transitions, 1962 flow [2024-05-12 10:40:41,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:40:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:40:41,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-05-12 10:40:41,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6149068322981367 [2024-05-12 10:40:41,128 INFO L175 Difference]: Start difference. First operand has 152 places, 145 transitions, 1570 flow. Second operand 7 states and 198 transitions. [2024-05-12 10:40:41,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 185 transitions, 1962 flow [2024-05-12 10:40:41,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 185 transitions, 1801 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-05-12 10:40:41,264 INFO L231 Difference]: Finished difference. Result has 150 places, 144 transitions, 1441 flow [2024-05-12 10:40:41,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1441, PETRI_PLACES=150, PETRI_TRANSITIONS=144} [2024-05-12 10:40:41,265 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 100 predicate places. [2024-05-12 10:40:41,265 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 144 transitions, 1441 flow [2024-05-12 10:40:41,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:41,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:41,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:41,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 10:40:41,265 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:41,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:41,266 INFO L85 PathProgramCache]: Analyzing trace with hash 262472792, now seen corresponding path program 2 times [2024-05-12 10:40:41,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:41,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377429776] [2024-05-12 10:40:41,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:41,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:41,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:41,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:41,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377429776] [2024-05-12 10:40:41,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377429776] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:41,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:41,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:40:41,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405415218] [2024-05-12 10:40:41,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:41,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:40:41,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:41,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:40:41,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:40:41,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:41,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 144 transitions, 1441 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:41,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:41,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:41,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:42,200 INFO L124 PetriNetUnfolderBase]: 2413/3963 cut-off events. [2024-05-12 10:40:42,200 INFO L125 PetriNetUnfolderBase]: For 55149/55149 co-relation queries the response was YES. [2024-05-12 10:40:42,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18793 conditions, 3963 events. 2413/3963 cut-off events. For 55149/55149 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 24815 event pairs, 659 based on Foata normal form. 1/3958 useless extension candidates. Maximal degree in co-relation 18722. Up to 3597 conditions per place. [2024-05-12 10:40:42,229 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 134 selfloop transitions, 16 changer transitions 0/162 dead transitions. [2024-05-12 10:40:42,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 162 transitions, 1785 flow [2024-05-12 10:40:42,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:40:42,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:40:42,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-05-12 10:40:42,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6467391304347826 [2024-05-12 10:40:42,231 INFO L175 Difference]: Start difference. First operand has 150 places, 144 transitions, 1441 flow. Second operand 4 states and 119 transitions. [2024-05-12 10:40:42,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 162 transitions, 1785 flow [2024-05-12 10:40:42,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 162 transitions, 1638 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-05-12 10:40:42,339 INFO L231 Difference]: Finished difference. Result has 148 places, 144 transitions, 1339 flow [2024-05-12 10:40:42,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1294, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1339, PETRI_PLACES=148, PETRI_TRANSITIONS=144} [2024-05-12 10:40:42,339 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 98 predicate places. [2024-05-12 10:40:42,340 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 144 transitions, 1339 flow [2024-05-12 10:40:42,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:42,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:42,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:42,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 10:40:42,340 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:42,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:42,341 INFO L85 PathProgramCache]: Analyzing trace with hash 300267326, now seen corresponding path program 1 times [2024-05-12 10:40:42,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:42,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563000616] [2024-05-12 10:40:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:42,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:42,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:42,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563000616] [2024-05-12 10:40:42,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563000616] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:42,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:42,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:42,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292664541] [2024-05-12 10:40:42,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:42,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:42,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:42,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:42,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:42,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:40:42,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 144 transitions, 1339 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:42,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:42,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:40:42,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:43,250 INFO L124 PetriNetUnfolderBase]: 2276/3878 cut-off events. [2024-05-12 10:40:43,250 INFO L125 PetriNetUnfolderBase]: For 57116/57116 co-relation queries the response was YES. [2024-05-12 10:40:43,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17494 conditions, 3878 events. 2276/3878 cut-off events. For 57116/57116 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25239 event pairs, 794 based on Foata normal form. 2/3863 useless extension candidates. Maximal degree in co-relation 17423. Up to 3305 conditions per place. [2024-05-12 10:40:43,279 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 136 selfloop transitions, 26 changer transitions 0/184 dead transitions. [2024-05-12 10:40:43,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 184 transitions, 1855 flow [2024-05-12 10:40:43,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:40:43,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:40:43,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-05-12 10:40:43,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-05-12 10:40:43,281 INFO L175 Difference]: Start difference. First operand has 148 places, 144 transitions, 1339 flow. Second operand 9 states and 234 transitions. [2024-05-12 10:40:43,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 184 transitions, 1855 flow [2024-05-12 10:40:43,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 184 transitions, 1823 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 10:40:43,367 INFO L231 Difference]: Finished difference. Result has 154 places, 150 transitions, 1423 flow [2024-05-12 10:40:43,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1307, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1423, PETRI_PLACES=154, PETRI_TRANSITIONS=150} [2024-05-12 10:40:43,368 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 104 predicate places. [2024-05-12 10:40:43,368 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 150 transitions, 1423 flow [2024-05-12 10:40:43,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:43,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:43,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:43,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 10:40:43,368 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:43,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:43,369 INFO L85 PathProgramCache]: Analyzing trace with hash 85109888, now seen corresponding path program 2 times [2024-05-12 10:40:43,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:43,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773428742] [2024-05-12 10:40:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:43,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:43,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:43,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773428742] [2024-05-12 10:40:43,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773428742] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:43,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:43,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:43,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985495514] [2024-05-12 10:40:43,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:43,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:43,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:43,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:43,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:43,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:40:43,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 150 transitions, 1423 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:43,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:43,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:40:43,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:44,298 INFO L124 PetriNetUnfolderBase]: 2272/3870 cut-off events. [2024-05-12 10:40:44,299 INFO L125 PetriNetUnfolderBase]: For 59880/59880 co-relation queries the response was YES. [2024-05-12 10:40:44,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17884 conditions, 3870 events. 2272/3870 cut-off events. For 59880/59880 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 25030 event pairs, 498 based on Foata normal form. 2/3866 useless extension candidates. Maximal degree in co-relation 17812. Up to 3312 conditions per place. [2024-05-12 10:40:44,326 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 128 selfloop transitions, 21 changer transitions 0/171 dead transitions. [2024-05-12 10:40:44,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 171 transitions, 1771 flow [2024-05-12 10:40:44,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:40:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:40:44,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-05-12 10:40:44,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260869565217392 [2024-05-12 10:40:44,327 INFO L175 Difference]: Start difference. First operand has 154 places, 150 transitions, 1423 flow. Second operand 5 states and 144 transitions. [2024-05-12 10:40:44,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 171 transitions, 1771 flow [2024-05-12 10:40:44,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 171 transitions, 1683 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-05-12 10:40:44,413 INFO L231 Difference]: Finished difference. Result has 152 places, 150 transitions, 1388 flow [2024-05-12 10:40:44,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1388, PETRI_PLACES=152, PETRI_TRANSITIONS=150} [2024-05-12 10:40:44,414 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 102 predicate places. [2024-05-12 10:40:44,414 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 150 transitions, 1388 flow [2024-05-12 10:40:44,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:44,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:44,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:44,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 10:40:44,415 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:44,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:44,415 INFO L85 PathProgramCache]: Analyzing trace with hash -2014725802, now seen corresponding path program 1 times [2024-05-12 10:40:44,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:44,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516594866] [2024-05-12 10:40:44,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:44,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:44,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:44,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516594866] [2024-05-12 10:40:44,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516594866] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:44,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:44,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:40:44,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465812818] [2024-05-12 10:40:44,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:44,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:40:44,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:44,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:40:44,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:40:44,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:44,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 150 transitions, 1388 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:44,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:44,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:44,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:45,321 INFO L124 PetriNetUnfolderBase]: 2424/3960 cut-off events. [2024-05-12 10:40:45,321 INFO L125 PetriNetUnfolderBase]: For 60953/60953 co-relation queries the response was YES. [2024-05-12 10:40:45,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18368 conditions, 3960 events. 2424/3960 cut-off events. For 60953/60953 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24793 event pairs, 913 based on Foata normal form. 2/3951 useless extension candidates. Maximal degree in co-relation 18297. Up to 3635 conditions per place. [2024-05-12 10:40:45,346 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 143 selfloop transitions, 10 changer transitions 0/165 dead transitions. [2024-05-12 10:40:45,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 165 transitions, 1748 flow [2024-05-12 10:40:45,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:40:45,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:40:45,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-05-12 10:40:45,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6032608695652174 [2024-05-12 10:40:45,347 INFO L175 Difference]: Start difference. First operand has 152 places, 150 transitions, 1388 flow. Second operand 4 states and 111 transitions. [2024-05-12 10:40:45,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 165 transitions, 1748 flow [2024-05-12 10:40:45,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 165 transitions, 1706 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 10:40:45,423 INFO L231 Difference]: Finished difference. Result has 152 places, 152 transitions, 1399 flow [2024-05-12 10:40:45,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1399, PETRI_PLACES=152, PETRI_TRANSITIONS=152} [2024-05-12 10:40:45,424 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 102 predicate places. [2024-05-12 10:40:45,424 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 152 transitions, 1399 flow [2024-05-12 10:40:45,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:45,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:45,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:45,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 10:40:45,425 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:45,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:45,425 INFO L85 PathProgramCache]: Analyzing trace with hash -289737936, now seen corresponding path program 1 times [2024-05-12 10:40:45,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:45,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060110310] [2024-05-12 10:40:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:45,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:45,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:45,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:45,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060110310] [2024-05-12 10:40:45,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060110310] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:45,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:45,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:40:45,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051366275] [2024-05-12 10:40:45,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:45,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:40:45,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:45,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:40:45,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:40:45,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:45,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 152 transitions, 1399 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:45,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:45,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:45,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:46,300 INFO L124 PetriNetUnfolderBase]: 2460/4022 cut-off events. [2024-05-12 10:40:46,300 INFO L125 PetriNetUnfolderBase]: For 64613/64616 co-relation queries the response was YES. [2024-05-12 10:40:46,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18811 conditions, 4022 events. 2460/4022 cut-off events. For 64613/64616 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25280 event pairs, 516 based on Foata normal form. 4/4018 useless extension candidates. Maximal degree in co-relation 18739. Up to 3406 conditions per place. [2024-05-12 10:40:46,331 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 137 selfloop transitions, 47 changer transitions 0/196 dead transitions. [2024-05-12 10:40:46,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 196 transitions, 2109 flow [2024-05-12 10:40:46,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:46,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:46,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-05-12 10:40:46,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-05-12 10:40:46,332 INFO L175 Difference]: Start difference. First operand has 152 places, 152 transitions, 1399 flow. Second operand 6 states and 178 transitions. [2024-05-12 10:40:46,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 196 transitions, 2109 flow [2024-05-12 10:40:46,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 196 transitions, 2072 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-05-12 10:40:46,425 INFO L231 Difference]: Finished difference. Result has 157 places, 164 transitions, 1629 flow [2024-05-12 10:40:46,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1362, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1629, PETRI_PLACES=157, PETRI_TRANSITIONS=164} [2024-05-12 10:40:46,426 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 107 predicate places. [2024-05-12 10:40:46,426 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 164 transitions, 1629 flow [2024-05-12 10:40:46,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:46,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:46,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:46,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 10:40:46,427 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:46,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:46,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1436583346, now seen corresponding path program 2 times [2024-05-12 10:40:46,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:46,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924901319] [2024-05-12 10:40:46,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:46,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:46,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:46,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:46,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924901319] [2024-05-12 10:40:46,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924901319] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:46,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:46,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:40:46,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018904533] [2024-05-12 10:40:46,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:46,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:40:46,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:46,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:40:46,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=38, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:40:46,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:46,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 164 transitions, 1629 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:46,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:46,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:46,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:47,397 INFO L124 PetriNetUnfolderBase]: 2512/4118 cut-off events. [2024-05-12 10:40:47,397 INFO L125 PetriNetUnfolderBase]: For 71884/71887 co-relation queries the response was YES. [2024-05-12 10:40:47,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20226 conditions, 4118 events. 2512/4118 cut-off events. For 71884/71887 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 26041 event pairs, 544 based on Foata normal form. 4/4108 useless extension candidates. Maximal degree in co-relation 20152. Up to 3454 conditions per place. [2024-05-12 10:40:47,431 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 140 selfloop transitions, 46 changer transitions 0/198 dead transitions. [2024-05-12 10:40:47,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 198 transitions, 2312 flow [2024-05-12 10:40:47,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:47,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:47,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-05-12 10:40:47,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-05-12 10:40:47,432 INFO L175 Difference]: Start difference. First operand has 157 places, 164 transitions, 1629 flow. Second operand 6 states and 171 transitions. [2024-05-12 10:40:47,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 198 transitions, 2312 flow [2024-05-12 10:40:47,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 198 transitions, 2250 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-05-12 10:40:47,548 INFO L231 Difference]: Finished difference. Result has 163 places, 172 transitions, 1792 flow [2024-05-12 10:40:47,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1575, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1792, PETRI_PLACES=163, PETRI_TRANSITIONS=172} [2024-05-12 10:40:47,548 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 113 predicate places. [2024-05-12 10:40:47,548 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 172 transitions, 1792 flow [2024-05-12 10:40:47,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:47,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:47,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:47,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 10:40:47,549 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:47,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:47,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1967549046, now seen corresponding path program 3 times [2024-05-12 10:40:47,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:47,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947658803] [2024-05-12 10:40:47,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:47,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:47,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:47,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:47,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947658803] [2024-05-12 10:40:47,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947658803] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:47,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:47,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:47,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491098231] [2024-05-12 10:40:47,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:47,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:47,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:47,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:47,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:48,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:48,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 172 transitions, 1792 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:48,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:48,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:48,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:48,514 INFO L124 PetriNetUnfolderBase]: 2508/4098 cut-off events. [2024-05-12 10:40:48,514 INFO L125 PetriNetUnfolderBase]: For 73572/73575 co-relation queries the response was YES. [2024-05-12 10:40:48,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20360 conditions, 4098 events. 2508/4098 cut-off events. For 73572/73575 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25784 event pairs, 518 based on Foata normal form. 4/4094 useless extension candidates. Maximal degree in co-relation 20283. Up to 3520 conditions per place. [2024-05-12 10:40:48,544 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 144 selfloop transitions, 44 changer transitions 0/200 dead transitions. [2024-05-12 10:40:48,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 200 transitions, 2310 flow [2024-05-12 10:40:48,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:40:48,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:40:48,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-05-12 10:40:48,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6695652173913044 [2024-05-12 10:40:48,545 INFO L175 Difference]: Start difference. First operand has 163 places, 172 transitions, 1792 flow. Second operand 5 states and 154 transitions. [2024-05-12 10:40:48,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 200 transitions, 2310 flow [2024-05-12 10:40:48,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 200 transitions, 2211 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-05-12 10:40:48,692 INFO L231 Difference]: Finished difference. Result has 166 places, 172 transitions, 1802 flow [2024-05-12 10:40:48,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1693, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1802, PETRI_PLACES=166, PETRI_TRANSITIONS=172} [2024-05-12 10:40:48,692 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 116 predicate places. [2024-05-12 10:40:48,692 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 172 transitions, 1802 flow [2024-05-12 10:40:48,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:48,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:48,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:48,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 10:40:48,693 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:48,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:48,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1406926687, now seen corresponding path program 1 times [2024-05-12 10:40:48,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:48,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255480061] [2024-05-12 10:40:48,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:48,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:49,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:49,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255480061] [2024-05-12 10:40:49,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255480061] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:49,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:49,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:40:49,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988436924] [2024-05-12 10:40:49,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:49,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:40:49,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:49,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:40:49,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:40:49,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:49,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 172 transitions, 1802 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:49,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:49,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:49,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:49,714 INFO L124 PetriNetUnfolderBase]: 2558/4394 cut-off events. [2024-05-12 10:40:49,714 INFO L125 PetriNetUnfolderBase]: For 80192/80192 co-relation queries the response was YES. [2024-05-12 10:40:49,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21068 conditions, 4394 events. 2558/4394 cut-off events. For 80192/80192 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 28780 event pairs, 658 based on Foata normal form. 2/4388 useless extension candidates. Maximal degree in co-relation 20990. Up to 3435 conditions per place. [2024-05-12 10:40:49,751 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 159 selfloop transitions, 65 changer transitions 0/236 dead transitions. [2024-05-12 10:40:49,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 236 transitions, 2668 flow [2024-05-12 10:40:49,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:40:49,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:40:49,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 292 transitions. [2024-05-12 10:40:49,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5770750988142292 [2024-05-12 10:40:49,753 INFO L175 Difference]: Start difference. First operand has 166 places, 172 transitions, 1802 flow. Second operand 11 states and 292 transitions. [2024-05-12 10:40:49,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 236 transitions, 2668 flow [2024-05-12 10:40:49,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 236 transitions, 2559 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:49,878 INFO L231 Difference]: Finished difference. Result has 174 places, 188 transitions, 2005 flow [2024-05-12 10:40:49,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1693, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2005, PETRI_PLACES=174, PETRI_TRANSITIONS=188} [2024-05-12 10:40:49,879 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 124 predicate places. [2024-05-12 10:40:49,879 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 188 transitions, 2005 flow [2024-05-12 10:40:49,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:49,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:49,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:49,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 10:40:49,880 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:49,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:49,880 INFO L85 PathProgramCache]: Analyzing trace with hash -282072243, now seen corresponding path program 2 times [2024-05-12 10:40:49,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:49,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531797676] [2024-05-12 10:40:49,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:49,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:50,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:50,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531797676] [2024-05-12 10:40:50,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531797676] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:50,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:50,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:50,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6220297] [2024-05-12 10:40:50,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:50,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:50,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:50,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:50,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:50,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:50,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 188 transitions, 2005 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:50,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:50,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:50,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:50,881 INFO L124 PetriNetUnfolderBase]: 2552/4174 cut-off events. [2024-05-12 10:40:50,881 INFO L125 PetriNetUnfolderBase]: For 83580/83583 co-relation queries the response was YES. [2024-05-12 10:40:50,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21575 conditions, 4174 events. 2552/4174 cut-off events. For 83580/83583 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 26422 event pairs, 522 based on Foata normal form. 4/4169 useless extension candidates. Maximal degree in co-relation 21495. Up to 3600 conditions per place. [2024-05-12 10:40:50,917 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 169 selfloop transitions, 37 changer transitions 0/218 dead transitions. [2024-05-12 10:40:50,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 218 transitions, 2489 flow [2024-05-12 10:40:50,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:50,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:50,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-05-12 10:40:50,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 10:40:50,918 INFO L175 Difference]: Start difference. First operand has 174 places, 188 transitions, 2005 flow. Second operand 6 states and 174 transitions. [2024-05-12 10:40:50,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 218 transitions, 2489 flow [2024-05-12 10:40:51,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 218 transitions, 2313 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-05-12 10:40:51,092 INFO L231 Difference]: Finished difference. Result has 173 places, 188 transitions, 1915 flow [2024-05-12 10:40:51,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1829, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1915, PETRI_PLACES=173, PETRI_TRANSITIONS=188} [2024-05-12 10:40:51,092 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 123 predicate places. [2024-05-12 10:40:51,092 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 188 transitions, 1915 flow [2024-05-12 10:40:51,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:51,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:51,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:51,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 10:40:51,093 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:51,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:51,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1407046843, now seen corresponding path program 1 times [2024-05-12 10:40:51,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:51,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749485191] [2024-05-12 10:40:51,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:51,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:51,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:51,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749485191] [2024-05-12 10:40:51,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749485191] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:51,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:51,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:51,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81733950] [2024-05-12 10:40:51,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:51,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:51,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:51,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:51,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:51,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:51,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 188 transitions, 1915 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:51,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:51,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:51,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:52,082 INFO L124 PetriNetUnfolderBase]: 2602/4254 cut-off events. [2024-05-12 10:40:52,082 INFO L125 PetriNetUnfolderBase]: For 88869/88872 co-relation queries the response was YES. [2024-05-12 10:40:52,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22000 conditions, 4254 events. 2602/4254 cut-off events. For 88869/88872 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 26926 event pairs, 542 based on Foata normal form. 4/4245 useless extension candidates. Maximal degree in co-relation 21920. Up to 3552 conditions per place. [2024-05-12 10:40:52,120 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 154 selfloop transitions, 61 changer transitions 0/227 dead transitions. [2024-05-12 10:40:52,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 227 transitions, 2716 flow [2024-05-12 10:40:52,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:52,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:52,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-05-12 10:40:52,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340579710144928 [2024-05-12 10:40:52,121 INFO L175 Difference]: Start difference. First operand has 173 places, 188 transitions, 1915 flow. Second operand 6 states and 175 transitions. [2024-05-12 10:40:52,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 227 transitions, 2716 flow [2024-05-12 10:40:52,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 227 transitions, 2642 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:52,350 INFO L231 Difference]: Finished difference. Result has 175 places, 198 transitions, 2141 flow [2024-05-12 10:40:52,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1841, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2141, PETRI_PLACES=175, PETRI_TRANSITIONS=198} [2024-05-12 10:40:52,350 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 125 predicate places. [2024-05-12 10:40:52,350 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 198 transitions, 2141 flow [2024-05-12 10:40:52,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:52,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:52,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:52,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 10:40:52,351 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:52,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:52,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1584415513, now seen corresponding path program 2 times [2024-05-12 10:40:52,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:52,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297973547] [2024-05-12 10:40:52,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:52,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:52,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:52,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:52,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297973547] [2024-05-12 10:40:52,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297973547] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:52,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:52,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:40:52,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960563493] [2024-05-12 10:40:52,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:52,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:40:52,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:52,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:40:52,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=38, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:40:52,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:52,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 198 transitions, 2141 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:52,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:52,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:52,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:53,227 INFO L124 PetriNetUnfolderBase]: 2596/4246 cut-off events. [2024-05-12 10:40:53,228 INFO L125 PetriNetUnfolderBase]: For 91163/91166 co-relation queries the response was YES. [2024-05-12 10:40:53,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22229 conditions, 4246 events. 2596/4246 cut-off events. For 91163/91166 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 26907 event pairs, 542 based on Foata normal form. 4/4235 useless extension candidates. Maximal degree in co-relation 22147. Up to 3547 conditions per place. [2024-05-12 10:40:53,267 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 158 selfloop transitions, 54 changer transitions 0/224 dead transitions. [2024-05-12 10:40:53,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 224 transitions, 2789 flow [2024-05-12 10:40:53,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:53,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:53,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-05-12 10:40:53,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-05-12 10:40:53,272 INFO L175 Difference]: Start difference. First operand has 175 places, 198 transitions, 2141 flow. Second operand 6 states and 171 transitions. [2024-05-12 10:40:53,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 224 transitions, 2789 flow [2024-05-12 10:40:53,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 224 transitions, 2705 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-05-12 10:40:53,454 INFO L231 Difference]: Finished difference. Result has 179 places, 198 transitions, 2174 flow [2024-05-12 10:40:53,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2174, PETRI_PLACES=179, PETRI_TRANSITIONS=198} [2024-05-12 10:40:53,454 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 129 predicate places. [2024-05-12 10:40:53,454 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 198 transitions, 2174 flow [2024-05-12 10:40:53,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:53,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:53,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:53,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 10:40:53,455 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:53,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:53,455 INFO L85 PathProgramCache]: Analyzing trace with hash -104694459, now seen corresponding path program 1 times [2024-05-12 10:40:53,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:53,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278150556] [2024-05-12 10:40:53,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:53,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:53,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:53,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278150556] [2024-05-12 10:40:53,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278150556] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:53,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:53,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:40:53,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598826578] [2024-05-12 10:40:53,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:53,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:40:53,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:53,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:40:53,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:40:53,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:53,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 198 transitions, 2174 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:53,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:53,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:53,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:54,334 INFO L124 PetriNetUnfolderBase]: 2614/4259 cut-off events. [2024-05-12 10:40:54,334 INFO L125 PetriNetUnfolderBase]: For 95635/95635 co-relation queries the response was YES. [2024-05-12 10:40:54,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22499 conditions, 4259 events. 2614/4259 cut-off events. For 95635/95635 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 26844 event pairs, 618 based on Foata normal form. 2/4249 useless extension candidates. Maximal degree in co-relation 22416. Up to 3852 conditions per place. [2024-05-12 10:40:54,370 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 192 selfloop transitions, 21 changer transitions 0/225 dead transitions. [2024-05-12 10:40:54,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 225 transitions, 2698 flow [2024-05-12 10:40:54,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:54,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:54,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-05-12 10:40:54,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5905797101449275 [2024-05-12 10:40:54,372 INFO L175 Difference]: Start difference. First operand has 179 places, 198 transitions, 2174 flow. Second operand 6 states and 163 transitions. [2024-05-12 10:40:54,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 225 transitions, 2698 flow [2024-05-12 10:40:54,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 225 transitions, 2597 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-05-12 10:40:54,539 INFO L231 Difference]: Finished difference. Result has 182 places, 200 transitions, 2164 flow [2024-05-12 10:40:54,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2073, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2164, PETRI_PLACES=182, PETRI_TRANSITIONS=200} [2024-05-12 10:40:54,540 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 132 predicate places. [2024-05-12 10:40:54,540 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 200 transitions, 2164 flow [2024-05-12 10:40:54,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:54,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:54,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:54,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 10:40:54,541 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:54,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:54,541 INFO L85 PathProgramCache]: Analyzing trace with hash 59526717, now seen corresponding path program 3 times [2024-05-12 10:40:54,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:54,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258134606] [2024-05-12 10:40:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:54,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:54,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:54,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258134606] [2024-05-12 10:40:54,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258134606] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:54,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:54,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:40:54,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393077750] [2024-05-12 10:40:54,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:54,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:40:54,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:54,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:40:54,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:40:54,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:54,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 200 transitions, 2164 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:54,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:54,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:54,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:55,488 INFO L124 PetriNetUnfolderBase]: 2639/4303 cut-off events. [2024-05-12 10:40:55,488 INFO L125 PetriNetUnfolderBase]: For 101268/101274 co-relation queries the response was YES. [2024-05-12 10:40:55,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22768 conditions, 4303 events. 2639/4303 cut-off events. For 101268/101274 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 27242 event pairs, 538 based on Foata normal form. 3/4288 useless extension candidates. Maximal degree in co-relation 22684. Up to 3534 conditions per place. [2024-05-12 10:40:55,527 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 162 selfloop transitions, 80 changer transitions 0/254 dead transitions. [2024-05-12 10:40:55,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 254 transitions, 3132 flow [2024-05-12 10:40:55,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:40:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:40:55,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 291 transitions. [2024-05-12 10:40:55,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575098814229249 [2024-05-12 10:40:55,529 INFO L175 Difference]: Start difference. First operand has 182 places, 200 transitions, 2164 flow. Second operand 11 states and 291 transitions. [2024-05-12 10:40:55,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 254 transitions, 3132 flow [2024-05-12 10:40:55,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 254 transitions, 3057 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-05-12 10:40:55,731 INFO L231 Difference]: Finished difference. Result has 189 places, 209 transitions, 2383 flow [2024-05-12 10:40:55,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2089, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2383, PETRI_PLACES=189, PETRI_TRANSITIONS=209} [2024-05-12 10:40:55,731 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 139 predicate places. [2024-05-12 10:40:55,731 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 209 transitions, 2383 flow [2024-05-12 10:40:55,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:55,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:55,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:55,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 10:40:55,732 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:55,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:55,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1349310623, now seen corresponding path program 4 times [2024-05-12 10:40:55,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:55,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19282395] [2024-05-12 10:40:55,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:55,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:56,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:56,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:56,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19282395] [2024-05-12 10:40:56,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19282395] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:56,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:56,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:40:56,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331810397] [2024-05-12 10:40:56,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:56,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:40:56,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:56,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:40:56,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:40:56,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:56,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 209 transitions, 2383 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:56,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:56,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:56,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:56,695 INFO L124 PetriNetUnfolderBase]: 2650/4322 cut-off events. [2024-05-12 10:40:56,695 INFO L125 PetriNetUnfolderBase]: For 106143/106149 co-relation queries the response was YES. [2024-05-12 10:40:56,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23285 conditions, 4322 events. 2650/4322 cut-off events. For 106143/106149 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 27400 event pairs, 538 based on Foata normal form. 3/4307 useless extension candidates. Maximal degree in co-relation 23200. Up to 3542 conditions per place. [2024-05-12 10:40:56,735 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 164 selfloop transitions, 81 changer transitions 0/257 dead transitions. [2024-05-12 10:40:56,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 257 transitions, 3285 flow [2024-05-12 10:40:56,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:40:56,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:40:56,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 291 transitions. [2024-05-12 10:40:56,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575098814229249 [2024-05-12 10:40:56,737 INFO L175 Difference]: Start difference. First operand has 189 places, 209 transitions, 2383 flow. Second operand 11 states and 291 transitions. [2024-05-12 10:40:56,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 257 transitions, 3285 flow [2024-05-12 10:40:56,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 257 transitions, 3148 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-05-12 10:40:56,994 INFO L231 Difference]: Finished difference. Result has 195 places, 212 transitions, 2462 flow [2024-05-12 10:40:56,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2256, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2462, PETRI_PLACES=195, PETRI_TRANSITIONS=212} [2024-05-12 10:40:56,994 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 145 predicate places. [2024-05-12 10:40:56,994 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 212 transitions, 2462 flow [2024-05-12 10:40:56,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:56,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:56,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:56,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 10:40:56,995 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:56,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:56,996 INFO L85 PathProgramCache]: Analyzing trace with hash -168254277, now seen corresponding path program 3 times [2024-05-12 10:40:56,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:56,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644669337] [2024-05-12 10:40:56,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:56,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:57,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:57,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644669337] [2024-05-12 10:40:57,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644669337] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:57,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:57,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:40:57,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298261052] [2024-05-12 10:40:57,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:57,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:40:57,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:57,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:40:57,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:40:57,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:57,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 212 transitions, 2462 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:57,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:57,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:57,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:57,880 INFO L124 PetriNetUnfolderBase]: 2645/4450 cut-off events. [2024-05-12 10:40:57,880 INFO L125 PetriNetUnfolderBase]: For 108352/108358 co-relation queries the response was YES. [2024-05-12 10:40:57,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23502 conditions, 4450 events. 2645/4450 cut-off events. For 108352/108358 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 28875 event pairs, 671 based on Foata normal form. 3/4431 useless extension candidates. Maximal degree in co-relation 23416. Up to 3617 conditions per place. [2024-05-12 10:40:57,916 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 161 selfloop transitions, 65 changer transitions 0/238 dead transitions. [2024-05-12 10:40:57,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 238 transitions, 3154 flow [2024-05-12 10:40:57,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:40:57,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:40:57,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-05-12 10:40:57,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231884057971014 [2024-05-12 10:40:57,917 INFO L175 Difference]: Start difference. First operand has 195 places, 212 transitions, 2462 flow. Second operand 6 states and 172 transitions. [2024-05-12 10:40:57,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 238 transitions, 3154 flow [2024-05-12 10:40:58,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 238 transitions, 2990 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-05-12 10:40:58,122 INFO L231 Difference]: Finished difference. Result has 194 places, 212 transitions, 2434 flow [2024-05-12 10:40:58,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2298, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2434, PETRI_PLACES=194, PETRI_TRANSITIONS=212} [2024-05-12 10:40:58,123 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 144 predicate places. [2024-05-12 10:40:58,123 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 212 transitions, 2434 flow [2024-05-12 10:40:58,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:58,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:58,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:58,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 10:40:58,123 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:58,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:58,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1018055059, now seen corresponding path program 5 times [2024-05-12 10:40:58,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:58,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325262885] [2024-05-12 10:40:58,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:58,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:58,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:58,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325262885] [2024-05-12 10:40:58,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325262885] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:58,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:58,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:40:58,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625727414] [2024-05-12 10:40:58,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:58,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:40:58,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:58,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:40:58,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:40:58,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:58,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 212 transitions, 2434 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:58,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:58,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:58,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:59,026 INFO L124 PetriNetUnfolderBase]: 2656/4366 cut-off events. [2024-05-12 10:40:59,026 INFO L125 PetriNetUnfolderBase]: For 111816/111822 co-relation queries the response was YES. [2024-05-12 10:40:59,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23455 conditions, 4366 events. 2656/4366 cut-off events. For 111816/111822 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 27993 event pairs, 549 based on Foata normal form. 3/4351 useless extension candidates. Maximal degree in co-relation 23369. Up to 3543 conditions per place. [2024-05-12 10:40:59,067 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 157 selfloop transitions, 85 changer transitions 0/254 dead transitions. [2024-05-12 10:40:59,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 254 transitions, 3233 flow [2024-05-12 10:40:59,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:40:59,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:40:59,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 267 transitions. [2024-05-12 10:40:59,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804347826086956 [2024-05-12 10:40:59,068 INFO L175 Difference]: Start difference. First operand has 194 places, 212 transitions, 2434 flow. Second operand 10 states and 267 transitions. [2024-05-12 10:40:59,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 254 transitions, 3233 flow [2024-05-12 10:40:59,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 254 transitions, 2955 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-05-12 10:40:59,323 INFO L231 Difference]: Finished difference. Result has 196 places, 216 transitions, 2379 flow [2024-05-12 10:40:59,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2156, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2379, PETRI_PLACES=196, PETRI_TRANSITIONS=216} [2024-05-12 10:40:59,324 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 146 predicate places. [2024-05-12 10:40:59,324 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 216 transitions, 2379 flow [2024-05-12 10:40:59,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:59,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:59,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:59,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 10:40:59,325 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:59,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:59,326 INFO L85 PathProgramCache]: Analyzing trace with hash 554904417, now seen corresponding path program 6 times [2024-05-12 10:40:59,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:59,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743729854] [2024-05-12 10:40:59,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:59,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:59,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:59,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743729854] [2024-05-12 10:40:59,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743729854] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:59,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:59,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:40:59,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251480735] [2024-05-12 10:40:59,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:59,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:40:59,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:59,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:40:59,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:40:59,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:59,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 216 transitions, 2379 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:59,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:59,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:59,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:00,276 INFO L124 PetriNetUnfolderBase]: 2653/4327 cut-off events. [2024-05-12 10:41:00,276 INFO L125 PetriNetUnfolderBase]: For 111730/111736 co-relation queries the response was YES. [2024-05-12 10:41:00,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23268 conditions, 4327 events. 2653/4327 cut-off events. For 111730/111736 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 27493 event pairs, 532 based on Foata normal form. 3/4320 useless extension candidates. Maximal degree in co-relation 23182. Up to 3759 conditions per place. [2024-05-12 10:41:00,316 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 194 selfloop transitions, 37 changer transitions 0/243 dead transitions. [2024-05-12 10:41:00,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 243 transitions, 2905 flow [2024-05-12 10:41:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:00,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-05-12 10:41:00,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-05-12 10:41:00,317 INFO L175 Difference]: Start difference. First operand has 196 places, 216 transitions, 2379 flow. Second operand 6 states and 171 transitions. [2024-05-12 10:41:00,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 243 transitions, 2905 flow [2024-05-12 10:41:00,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 243 transitions, 2731 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-05-12 10:41:00,528 INFO L231 Difference]: Finished difference. Result has 196 places, 216 transitions, 2289 flow [2024-05-12 10:41:00,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2205, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2289, PETRI_PLACES=196, PETRI_TRANSITIONS=216} [2024-05-12 10:41:00,528 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 146 predicate places. [2024-05-12 10:41:00,529 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 216 transitions, 2289 flow [2024-05-12 10:41:00,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:00,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:00,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:00,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 10:41:00,529 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:00,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:00,529 INFO L85 PathProgramCache]: Analyzing trace with hash 909404607, now seen corresponding path program 7 times [2024-05-12 10:41:00,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:00,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332264328] [2024-05-12 10:41:00,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:00,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:00,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:00,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332264328] [2024-05-12 10:41:00,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332264328] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:00,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:00,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:00,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958882708] [2024-05-12 10:41:00,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:00,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:00,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:00,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:00,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:00,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:00,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 216 transitions, 2289 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:00,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:00,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:00,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:01,517 INFO L124 PetriNetUnfolderBase]: 2650/4323 cut-off events. [2024-05-12 10:41:01,518 INFO L125 PetriNetUnfolderBase]: For 114083/114089 co-relation queries the response was YES. [2024-05-12 10:41:01,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23008 conditions, 4323 events. 2650/4323 cut-off events. For 114083/114089 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 27443 event pairs, 532 based on Foata normal form. 3/4316 useless extension candidates. Maximal degree in co-relation 22921. Up to 3675 conditions per place. [2024-05-12 10:41:01,552 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 176 selfloop transitions, 55 changer transitions 0/243 dead transitions. [2024-05-12 10:41:01,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 243 transitions, 2815 flow [2024-05-12 10:41:01,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:01,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:01,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-05-12 10:41:01,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6268115942028986 [2024-05-12 10:41:01,553 INFO L175 Difference]: Start difference. First operand has 196 places, 216 transitions, 2289 flow. Second operand 6 states and 173 transitions. [2024-05-12 10:41:01,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 243 transitions, 2815 flow [2024-05-12 10:41:01,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 243 transitions, 2715 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-05-12 10:41:01,897 INFO L231 Difference]: Finished difference. Result has 196 places, 216 transitions, 2309 flow [2024-05-12 10:41:01,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2189, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2309, PETRI_PLACES=196, PETRI_TRANSITIONS=216} [2024-05-12 10:41:01,898 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 146 predicate places. [2024-05-12 10:41:01,898 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 216 transitions, 2309 flow [2024-05-12 10:41:01,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:01,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:01,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:01,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 10:41:01,898 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:01,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:01,899 INFO L85 PathProgramCache]: Analyzing trace with hash 909583353, now seen corresponding path program 4 times [2024-05-12 10:41:01,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:01,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129029052] [2024-05-12 10:41:01,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:01,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:02,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:02,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129029052] [2024-05-12 10:41:02,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129029052] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:02,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:02,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:02,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887649168] [2024-05-12 10:41:02,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:02,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:02,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:02,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:02,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:02,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:02,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 216 transitions, 2309 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:02,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:02,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:02,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:02,800 INFO L124 PetriNetUnfolderBase]: 2672/4423 cut-off events. [2024-05-12 10:41:02,800 INFO L125 PetriNetUnfolderBase]: For 114261/114261 co-relation queries the response was YES. [2024-05-12 10:41:02,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23347 conditions, 4423 events. 2672/4423 cut-off events. For 114261/114261 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 28503 event pairs, 938 based on Foata normal form. 1/4396 useless extension candidates. Maximal degree in co-relation 23260. Up to 3944 conditions per place. [2024-05-12 10:41:02,839 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 209 selfloop transitions, 22 changer transitions 0/243 dead transitions. [2024-05-12 10:41:02,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 243 transitions, 2891 flow [2024-05-12 10:41:02,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:02,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:02,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-05-12 10:41:02,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797101449275363 [2024-05-12 10:41:02,840 INFO L175 Difference]: Start difference. First operand has 196 places, 216 transitions, 2309 flow. Second operand 6 states and 160 transitions. [2024-05-12 10:41:02,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 243 transitions, 2891 flow [2024-05-12 10:41:03,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 243 transitions, 2809 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-05-12 10:41:03,094 INFO L231 Difference]: Finished difference. Result has 198 places, 222 transitions, 2355 flow [2024-05-12 10:41:03,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2227, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2355, PETRI_PLACES=198, PETRI_TRANSITIONS=222} [2024-05-12 10:41:03,094 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 148 predicate places. [2024-05-12 10:41:03,094 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 222 transitions, 2355 flow [2024-05-12 10:41:03,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:03,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:03,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:03,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 10:41:03,095 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:03,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:03,095 INFO L85 PathProgramCache]: Analyzing trace with hash 864483029, now seen corresponding path program 5 times [2024-05-12 10:41:03,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:03,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390089010] [2024-05-12 10:41:03,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:03,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:03,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:03,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390089010] [2024-05-12 10:41:03,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390089010] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:03,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:03,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:41:03,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799014909] [2024-05-12 10:41:03,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:03,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:41:03,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:03,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:41:03,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:41:03,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:03,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 222 transitions, 2355 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:03,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:03,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:03,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:04,125 INFO L124 PetriNetUnfolderBase]: 2666/4330 cut-off events. [2024-05-12 10:41:04,125 INFO L125 PetriNetUnfolderBase]: For 112143/112146 co-relation queries the response was YES. [2024-05-12 10:41:04,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22951 conditions, 4330 events. 2666/4330 cut-off events. For 112143/112146 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 27312 event pairs, 517 based on Foata normal form. 4/4326 useless extension candidates. Maximal degree in co-relation 22864. Up to 3717 conditions per place. [2024-05-12 10:41:04,170 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 186 selfloop transitions, 49 changer transitions 0/247 dead transitions. [2024-05-12 10:41:04,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 247 transitions, 2981 flow [2024-05-12 10:41:04,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:41:04,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:41:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-05-12 10:41:04,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6565217391304348 [2024-05-12 10:41:04,172 INFO L175 Difference]: Start difference. First operand has 198 places, 222 transitions, 2355 flow. Second operand 5 states and 151 transitions. [2024-05-12 10:41:04,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 247 transitions, 2981 flow [2024-05-12 10:41:04,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 247 transitions, 2904 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-05-12 10:41:04,428 INFO L231 Difference]: Finished difference. Result has 201 places, 222 transitions, 2395 flow [2024-05-12 10:41:04,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2278, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2395, PETRI_PLACES=201, PETRI_TRANSITIONS=222} [2024-05-12 10:41:04,428 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 151 predicate places. [2024-05-12 10:41:04,428 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 222 transitions, 2395 flow [2024-05-12 10:41:04,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:04,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:04,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:04,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 10:41:04,429 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:04,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:04,429 INFO L85 PathProgramCache]: Analyzing trace with hash 870196949, now seen corresponding path program 6 times [2024-05-12 10:41:04,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:04,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480453419] [2024-05-12 10:41:04,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:04,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:04,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:04,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480453419] [2024-05-12 10:41:04,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480453419] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:04,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:04,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:04,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912448323] [2024-05-12 10:41:04,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:04,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:04,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:04,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:04,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:04,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:04,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 222 transitions, 2395 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:04,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:04,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:04,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:05,379 INFO L124 PetriNetUnfolderBase]: 2661/4532 cut-off events. [2024-05-12 10:41:05,379 INFO L125 PetriNetUnfolderBase]: For 114624/114624 co-relation queries the response was YES. [2024-05-12 10:41:05,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23302 conditions, 4532 events. 2661/4532 cut-off events. For 114624/114624 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 29620 event pairs, 652 based on Foata normal form. 1/4526 useless extension candidates. Maximal degree in co-relation 23214. Up to 3712 conditions per place. [2024-05-12 10:41:05,426 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 190 selfloop transitions, 56 changer transitions 0/258 dead transitions. [2024-05-12 10:41:05,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 258 transitions, 2973 flow [2024-05-12 10:41:05,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:05,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:05,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-05-12 10:41:05,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 10:41:05,427 INFO L175 Difference]: Start difference. First operand has 201 places, 222 transitions, 2395 flow. Second operand 7 states and 203 transitions. [2024-05-12 10:41:05,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 258 transitions, 2973 flow [2024-05-12 10:41:05,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 258 transitions, 2798 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-05-12 10:41:05,671 INFO L231 Difference]: Finished difference. Result has 202 places, 222 transitions, 2349 flow [2024-05-12 10:41:05,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2220, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2349, PETRI_PLACES=202, PETRI_TRANSITIONS=222} [2024-05-12 10:41:05,672 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 152 predicate places. [2024-05-12 10:41:05,672 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 222 transitions, 2349 flow [2024-05-12 10:41:05,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:05,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:05,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:05,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 10:41:05,673 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:05,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:05,673 INFO L85 PathProgramCache]: Analyzing trace with hash 864491957, now seen corresponding path program 2 times [2024-05-12 10:41:05,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:05,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407615244] [2024-05-12 10:41:05,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:05,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:06,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:06,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407615244] [2024-05-12 10:41:06,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407615244] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:06,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:06,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:06,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134004259] [2024-05-12 10:41:06,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:06,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:06,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:06,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:06,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:06,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:06,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 222 transitions, 2349 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:06,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:06,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:06,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:06,562 INFO L124 PetriNetUnfolderBase]: 2679/4335 cut-off events. [2024-05-12 10:41:06,563 INFO L125 PetriNetUnfolderBase]: For 115113/115113 co-relation queries the response was YES. [2024-05-12 10:41:06,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23219 conditions, 4335 events. 2679/4335 cut-off events. For 115113/115113 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 27267 event pairs, 506 based on Foata normal form. 2/4333 useless extension candidates. Maximal degree in co-relation 23131. Up to 3949 conditions per place. [2024-05-12 10:41:06,604 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 216 selfloop transitions, 18 changer transitions 0/246 dead transitions. [2024-05-12 10:41:06,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 246 transitions, 2913 flow [2024-05-12 10:41:06,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:41:06,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:41:06,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-05-12 10:41:06,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130434782608696 [2024-05-12 10:41:06,605 INFO L175 Difference]: Start difference. First operand has 202 places, 222 transitions, 2349 flow. Second operand 5 states and 141 transitions. [2024-05-12 10:41:06,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 246 transitions, 2913 flow [2024-05-12 10:41:06,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 246 transitions, 2790 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-05-12 10:41:06,818 INFO L231 Difference]: Finished difference. Result has 200 places, 224 transitions, 2315 flow [2024-05-12 10:41:06,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2226, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2315, PETRI_PLACES=200, PETRI_TRANSITIONS=224} [2024-05-12 10:41:06,819 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 150 predicate places. [2024-05-12 10:41:06,819 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 224 transitions, 2315 flow [2024-05-12 10:41:06,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:06,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:06,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:06,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 10:41:06,820 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:06,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:06,821 INFO L85 PathProgramCache]: Analyzing trace with hash 878776757, now seen corresponding path program 3 times [2024-05-12 10:41:06,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:06,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744549502] [2024-05-12 10:41:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:06,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:07,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:07,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744549502] [2024-05-12 10:41:07,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744549502] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:07,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:07,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:07,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780172179] [2024-05-12 10:41:07,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:07,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:07,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:07,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:07,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:07,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:07,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 224 transitions, 2315 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:07,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:07,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:07,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:07,746 INFO L124 PetriNetUnfolderBase]: 2674/4328 cut-off events. [2024-05-12 10:41:07,746 INFO L125 PetriNetUnfolderBase]: For 109393/109393 co-relation queries the response was YES. [2024-05-12 10:41:07,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22884 conditions, 4328 events. 2674/4328 cut-off events. For 109393/109393 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 27248 event pairs, 501 based on Foata normal form. 2/4326 useless extension candidates. Maximal degree in co-relation 22796. Up to 3910 conditions per place. [2024-05-12 10:41:07,787 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 218 selfloop transitions, 22 changer transitions 0/252 dead transitions. [2024-05-12 10:41:07,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 252 transitions, 2903 flow [2024-05-12 10:41:07,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:07,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:07,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-05-12 10:41:07,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942028985507246 [2024-05-12 10:41:07,789 INFO L175 Difference]: Start difference. First operand has 200 places, 224 transitions, 2315 flow. Second operand 6 states and 164 transitions. [2024-05-12 10:41:07,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 252 transitions, 2903 flow [2024-05-12 10:41:08,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 252 transitions, 2830 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-05-12 10:41:08,058 INFO L231 Difference]: Finished difference. Result has 203 places, 226 transitions, 2343 flow [2024-05-12 10:41:08,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2343, PETRI_PLACES=203, PETRI_TRANSITIONS=226} [2024-05-12 10:41:08,058 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 153 predicate places. [2024-05-12 10:41:08,058 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 226 transitions, 2343 flow [2024-05-12 10:41:08,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:08,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:08,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:08,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 10:41:08,059 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:08,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:08,059 INFO L85 PathProgramCache]: Analyzing trace with hash 68106525, now seen corresponding path program 1 times [2024-05-12 10:41:08,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:08,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363024958] [2024-05-12 10:41:08,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:08,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:08,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:08,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:08,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363024958] [2024-05-12 10:41:08,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363024958] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:08,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:08,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:08,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899150060] [2024-05-12 10:41:08,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:08,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:08,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:08,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:08,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:08,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:41:08,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 226 transitions, 2343 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:08,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:08,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:41:08,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:09,063 INFO L124 PetriNetUnfolderBase]: 2637/4428 cut-off events. [2024-05-12 10:41:09,063 INFO L125 PetriNetUnfolderBase]: For 129846/129846 co-relation queries the response was YES. [2024-05-12 10:41:09,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23443 conditions, 4428 events. 2637/4428 cut-off events. For 129846/129846 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 29072 event pairs, 816 based on Foata normal form. 8/4407 useless extension candidates. Maximal degree in co-relation 23354. Up to 3590 conditions per place. [2024-05-12 10:41:09,104 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 206 selfloop transitions, 37 changer transitions 0/275 dead transitions. [2024-05-12 10:41:09,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 275 transitions, 3087 flow [2024-05-12 10:41:09,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:41:09,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:41:09,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 264 transitions. [2024-05-12 10:41:09,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5739130434782609 [2024-05-12 10:41:09,105 INFO L175 Difference]: Start difference. First operand has 203 places, 226 transitions, 2343 flow. Second operand 10 states and 264 transitions. [2024-05-12 10:41:09,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 275 transitions, 3087 flow [2024-05-12 10:41:09,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 275 transitions, 3002 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-05-12 10:41:09,368 INFO L231 Difference]: Finished difference. Result has 209 places, 228 transitions, 2366 flow [2024-05-12 10:41:09,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2258, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2366, PETRI_PLACES=209, PETRI_TRANSITIONS=228} [2024-05-12 10:41:09,369 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 159 predicate places. [2024-05-12 10:41:09,369 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 228 transitions, 2366 flow [2024-05-12 10:41:09,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:09,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:09,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:09,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 10:41:09,370 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:09,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:09,370 INFO L85 PathProgramCache]: Analyzing trace with hash 794122365, now seen corresponding path program 2 times [2024-05-12 10:41:09,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:09,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402940823] [2024-05-12 10:41:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:09,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:09,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:09,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402940823] [2024-05-12 10:41:09,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402940823] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:09,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:09,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:09,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057350864] [2024-05-12 10:41:09,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:09,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:09,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:09,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:09,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:09,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:41:09,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 228 transitions, 2366 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:09,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:09,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:41:09,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:10,412 INFO L124 PetriNetUnfolderBase]: 2734/4492 cut-off events. [2024-05-12 10:41:10,412 INFO L125 PetriNetUnfolderBase]: For 136793/136793 co-relation queries the response was YES. [2024-05-12 10:41:10,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24173 conditions, 4492 events. 2734/4492 cut-off events. For 136793/136793 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 29005 event pairs, 494 based on Foata normal form. 10/4500 useless extension candidates. Maximal degree in co-relation 24083. Up to 3826 conditions per place. [2024-05-12 10:41:10,454 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 203 selfloop transitions, 34 changer transitions 0/269 dead transitions. [2024-05-12 10:41:10,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 269 transitions, 2962 flow [2024-05-12 10:41:10,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:41:10,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:41:10,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-05-12 10:41:10,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608695652173913 [2024-05-12 10:41:10,455 INFO L175 Difference]: Start difference. First operand has 209 places, 228 transitions, 2366 flow. Second operand 10 states and 258 transitions. [2024-05-12 10:41:10,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 269 transitions, 2962 flow [2024-05-12 10:41:10,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 269 transitions, 2913 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-05-12 10:41:10,671 INFO L231 Difference]: Finished difference. Result has 213 places, 229 transitions, 2409 flow [2024-05-12 10:41:10,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2317, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2409, PETRI_PLACES=213, PETRI_TRANSITIONS=229} [2024-05-12 10:41:10,672 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 163 predicate places. [2024-05-12 10:41:10,672 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 229 transitions, 2409 flow [2024-05-12 10:41:10,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:10,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:10,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:10,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 10:41:10,673 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:10,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:10,674 INFO L85 PathProgramCache]: Analyzing trace with hash 909413535, now seen corresponding path program 3 times [2024-05-12 10:41:10,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:10,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766834483] [2024-05-12 10:41:10,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:10,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:11,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:11,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766834483] [2024-05-12 10:41:11,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766834483] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:11,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:11,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:11,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428840922] [2024-05-12 10:41:11,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:11,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:11,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:11,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:11,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:11,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:41:11,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 229 transitions, 2409 flow. Second operand has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:11,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:11,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:41:11,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:11,653 INFO L124 PetriNetUnfolderBase]: 2694/4560 cut-off events. [2024-05-12 10:41:11,654 INFO L125 PetriNetUnfolderBase]: For 129444/129444 co-relation queries the response was YES. [2024-05-12 10:41:11,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23735 conditions, 4560 events. 2694/4560 cut-off events. For 129444/129444 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 30100 event pairs, 793 based on Foata normal form. 10/4553 useless extension candidates. Maximal degree in co-relation 23643. Up to 3763 conditions per place. [2024-05-12 10:41:11,697 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 199 selfloop transitions, 29 changer transitions 0/260 dead transitions. [2024-05-12 10:41:11,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 260 transitions, 2955 flow [2024-05-12 10:41:11,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:11,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:11,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-05-12 10:41:11,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6268115942028986 [2024-05-12 10:41:11,698 INFO L175 Difference]: Start difference. First operand has 213 places, 229 transitions, 2409 flow. Second operand 6 states and 173 transitions. [2024-05-12 10:41:11,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 260 transitions, 2955 flow [2024-05-12 10:41:11,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 260 transitions, 2885 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-05-12 10:41:11,981 INFO L231 Difference]: Finished difference. Result has 211 places, 229 transitions, 2406 flow [2024-05-12 10:41:11,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2339, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2406, PETRI_PLACES=211, PETRI_TRANSITIONS=229} [2024-05-12 10:41:11,982 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 161 predicate places. [2024-05-12 10:41:11,982 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 229 transitions, 2406 flow [2024-05-12 10:41:11,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.77777777777778) internal successors, (169), 9 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:11,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:11,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:11,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-05-12 10:41:11,983 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:11,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:11,983 INFO L85 PathProgramCache]: Analyzing trace with hash 186439353, now seen corresponding path program 1 times [2024-05-12 10:41:11,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:11,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465759716] [2024-05-12 10:41:11,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:11,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:12,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:12,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465759716] [2024-05-12 10:41:12,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465759716] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:12,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:12,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:12,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168080797] [2024-05-12 10:41:12,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:12,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:12,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:12,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:12,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:12,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:12,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 229 transitions, 2406 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:12,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:12,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:12,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:12,961 INFO L124 PetriNetUnfolderBase]: 2874/4752 cut-off events. [2024-05-12 10:41:12,962 INFO L125 PetriNetUnfolderBase]: For 123178/123178 co-relation queries the response was YES. [2024-05-12 10:41:13,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24684 conditions, 4752 events. 2874/4752 cut-off events. For 123178/123178 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 31105 event pairs, 1009 based on Foata normal form. 2/4721 useless extension candidates. Maximal degree in co-relation 24591. Up to 4241 conditions per place. [2024-05-12 10:41:13,099 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 220 selfloop transitions, 21 changer transitions 0/253 dead transitions. [2024-05-12 10:41:13,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 253 transitions, 2966 flow [2024-05-12 10:41:13,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:13,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:13,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-05-12 10:41:13,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797101449275363 [2024-05-12 10:41:13,100 INFO L175 Difference]: Start difference. First operand has 211 places, 229 transitions, 2406 flow. Second operand 6 states and 160 transitions. [2024-05-12 10:41:13,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 253 transitions, 2966 flow [2024-05-12 10:41:13,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 253 transitions, 2902 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-05-12 10:41:13,361 INFO L231 Difference]: Finished difference. Result has 212 places, 231 transitions, 2421 flow [2024-05-12 10:41:13,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2342, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2421, PETRI_PLACES=212, PETRI_TRANSITIONS=231} [2024-05-12 10:41:13,361 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 162 predicate places. [2024-05-12 10:41:13,362 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 231 transitions, 2421 flow [2024-05-12 10:41:13,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:13,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:13,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:13,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-05-12 10:41:13,362 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:13,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:13,363 INFO L85 PathProgramCache]: Analyzing trace with hash 870211829, now seen corresponding path program 2 times [2024-05-12 10:41:13,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:13,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973934149] [2024-05-12 10:41:13,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:13,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:13,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:13,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973934149] [2024-05-12 10:41:13,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973934149] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:13,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:13,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:13,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699549691] [2024-05-12 10:41:13,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:13,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:13,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:13,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:13,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:13,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:13,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 231 transitions, 2421 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:13,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:13,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:13,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:14,352 INFO L124 PetriNetUnfolderBase]: 2892/4772 cut-off events. [2024-05-12 10:41:14,352 INFO L125 PetriNetUnfolderBase]: For 127127/127127 co-relation queries the response was YES. [2024-05-12 10:41:14,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24900 conditions, 4772 events. 2892/4772 cut-off events. For 127127/127127 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 31087 event pairs, 1021 based on Foata normal form. 2/4740 useless extension candidates. Maximal degree in co-relation 24806. Up to 4253 conditions per place. [2024-05-12 10:41:14,397 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 218 selfloop transitions, 22 changer transitions 0/252 dead transitions. [2024-05-12 10:41:14,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 252 transitions, 2977 flow [2024-05-12 10:41:14,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:41:14,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:41:14,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-05-12 10:41:14,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-05-12 10:41:14,398 INFO L175 Difference]: Start difference. First operand has 212 places, 231 transitions, 2421 flow. Second operand 5 states and 138 transitions. [2024-05-12 10:41:14,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 252 transitions, 2977 flow [2024-05-12 10:41:14,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 252 transitions, 2914 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-05-12 10:41:14,646 INFO L231 Difference]: Finished difference. Result has 213 places, 233 transitions, 2446 flow [2024-05-12 10:41:14,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2358, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2446, PETRI_PLACES=213, PETRI_TRANSITIONS=233} [2024-05-12 10:41:14,647 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 163 predicate places. [2024-05-12 10:41:14,647 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 233 transitions, 2446 flow [2024-05-12 10:41:14,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:14,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:14,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:14,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-05-12 10:41:14,648 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:14,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:14,648 INFO L85 PathProgramCache]: Analyzing trace with hash 878782709, now seen corresponding path program 3 times [2024-05-12 10:41:14,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:14,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690671902] [2024-05-12 10:41:14,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:14,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:15,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:15,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690671902] [2024-05-12 10:41:15,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690671902] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:15,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:15,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:15,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752100356] [2024-05-12 10:41:15,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:15,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:15,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:15,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:15,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:15,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:15,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 233 transitions, 2446 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:15,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:15,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:15,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:15,634 INFO L124 PetriNetUnfolderBase]: 2887/4668 cut-off events. [2024-05-12 10:41:15,634 INFO L125 PetriNetUnfolderBase]: For 127832/127835 co-relation queries the response was YES. [2024-05-12 10:41:15,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24775 conditions, 4668 events. 2887/4668 cut-off events. For 127832/127835 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 29819 event pairs, 524 based on Foata normal form. 4/4662 useless extension candidates. Maximal degree in co-relation 24680. Up to 4214 conditions per place. [2024-05-12 10:41:15,674 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 217 selfloop transitions, 23 changer transitions 0/252 dead transitions. [2024-05-12 10:41:15,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 252 transitions, 3000 flow [2024-05-12 10:41:15,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:41:15,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:41:15,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-05-12 10:41:15,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-05-12 10:41:15,676 INFO L175 Difference]: Start difference. First operand has 213 places, 233 transitions, 2446 flow. Second operand 5 states and 135 transitions. [2024-05-12 10:41:15,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 252 transitions, 3000 flow [2024-05-12 10:41:15,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 252 transitions, 2928 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-05-12 10:41:15,892 INFO L231 Difference]: Finished difference. Result has 215 places, 235 transitions, 2465 flow [2024-05-12 10:41:15,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2378, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2465, PETRI_PLACES=215, PETRI_TRANSITIONS=235} [2024-05-12 10:41:15,893 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 165 predicate places. [2024-05-12 10:41:15,893 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 235 transitions, 2465 flow [2024-05-12 10:41:15,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:15,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:15,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:15,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-05-12 10:41:15,894 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:15,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:15,895 INFO L85 PathProgramCache]: Analyzing trace with hash 228208726, now seen corresponding path program 1 times [2024-05-12 10:41:15,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:15,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901805542] [2024-05-12 10:41:15,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:15,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:15,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:16,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:16,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:16,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901805542] [2024-05-12 10:41:16,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901805542] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:16,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:16,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:41:16,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084600932] [2024-05-12 10:41:16,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:16,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:41:16,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:16,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:41:16,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:41:16,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 46 [2024-05-12 10:41:16,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 235 transitions, 2465 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:16,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:16,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 46 [2024-05-12 10:41:16,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:16,500 INFO L124 PetriNetUnfolderBase]: 1817/3982 cut-off events. [2024-05-12 10:41:16,500 INFO L125 PetriNetUnfolderBase]: For 49015/49346 co-relation queries the response was YES. [2024-05-12 10:41:16,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14501 conditions, 3982 events. 1817/3982 cut-off events. For 49015/49346 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 32693 event pairs, 248 based on Foata normal form. 176/3892 useless extension candidates. Maximal degree in co-relation 14405. Up to 1604 conditions per place. [2024-05-12 10:41:16,540 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 32 selfloop transitions, 57 changer transitions 0/252 dead transitions. [2024-05-12 10:41:16,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 252 transitions, 2733 flow [2024-05-12 10:41:16,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:41:16,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:41:16,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-05-12 10:41:16,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7336956521739131 [2024-05-12 10:41:16,541 INFO L175 Difference]: Start difference. First operand has 215 places, 235 transitions, 2465 flow. Second operand 4 states and 135 transitions. [2024-05-12 10:41:16,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 252 transitions, 2733 flow [2024-05-12 10:41:16,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 252 transitions, 2662 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-05-12 10:41:16,679 INFO L231 Difference]: Finished difference. Result has 217 places, 239 transitions, 2666 flow [2024-05-12 10:41:16,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2394, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2666, PETRI_PLACES=217, PETRI_TRANSITIONS=239} [2024-05-12 10:41:16,680 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 167 predicate places. [2024-05-12 10:41:16,680 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 239 transitions, 2666 flow [2024-05-12 10:41:16,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:16,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:16,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:16,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-05-12 10:41:16,680 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:16,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:16,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1299883487, now seen corresponding path program 1 times [2024-05-12 10:41:16,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:16,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185275318] [2024-05-12 10:41:16,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:16,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:17,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:17,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185275318] [2024-05-12 10:41:17,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185275318] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:17,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:17,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:41:17,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110279267] [2024-05-12 10:41:17,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:17,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:41:17,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:17,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:41:17,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:41:17,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:17,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 239 transitions, 2666 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:17,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:17,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:17,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:17,999 INFO L124 PetriNetUnfolderBase]: 3118/5273 cut-off events. [2024-05-12 10:41:17,999 INFO L125 PetriNetUnfolderBase]: For 173487/173515 co-relation queries the response was YES. [2024-05-12 10:41:18,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29200 conditions, 5273 events. 3118/5273 cut-off events. For 173487/173515 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 35621 event pairs, 782 based on Foata normal form. 19/5103 useless extension candidates. Maximal degree in co-relation 29102. Up to 4139 conditions per place. [2024-05-12 10:41:18,045 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 189 selfloop transitions, 79 changer transitions 0/281 dead transitions. [2024-05-12 10:41:18,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 281 transitions, 3518 flow [2024-05-12 10:41:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:18,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:18,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-05-12 10:41:18,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273291925465838 [2024-05-12 10:41:18,046 INFO L175 Difference]: Start difference. First operand has 217 places, 239 transitions, 2666 flow. Second operand 7 states and 202 transitions. [2024-05-12 10:41:18,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 281 transitions, 3518 flow [2024-05-12 10:41:18,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 281 transitions, 3516 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 10:41:18,381 INFO L231 Difference]: Finished difference. Result has 223 places, 243 transitions, 2907 flow [2024-05-12 10:41:18,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2664, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2907, PETRI_PLACES=223, PETRI_TRANSITIONS=243} [2024-05-12 10:41:18,382 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 173 predicate places. [2024-05-12 10:41:18,382 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 243 transitions, 2907 flow [2024-05-12 10:41:18,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:18,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:18,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:18,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-05-12 10:41:18,383 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:18,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:18,383 INFO L85 PathProgramCache]: Analyzing trace with hash 734742703, now seen corresponding path program 2 times [2024-05-12 10:41:18,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:18,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320115609] [2024-05-12 10:41:18,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:18,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:18,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:18,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:18,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320115609] [2024-05-12 10:41:18,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320115609] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:18,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:18,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:41:18,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963999419] [2024-05-12 10:41:18,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:18,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:41:18,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:18,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:41:18,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:41:18,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:18,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 243 transitions, 2907 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:18,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:18,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:18,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:19,676 INFO L124 PetriNetUnfolderBase]: 3266/5521 cut-off events. [2024-05-12 10:41:19,676 INFO L125 PetriNetUnfolderBase]: For 192359/192393 co-relation queries the response was YES. [2024-05-12 10:41:19,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31385 conditions, 5521 events. 3266/5521 cut-off events. For 192359/192393 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 37719 event pairs, 1123 based on Foata normal form. 23/5338 useless extension candidates. Maximal degree in co-relation 31285. Up to 4665 conditions per place. [2024-05-12 10:41:19,729 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 188 selfloop transitions, 73 changer transitions 0/274 dead transitions. [2024-05-12 10:41:19,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 274 transitions, 3567 flow [2024-05-12 10:41:19,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:19,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:19,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-05-12 10:41:19,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993788819875776 [2024-05-12 10:41:19,730 INFO L175 Difference]: Start difference. First operand has 223 places, 243 transitions, 2907 flow. Second operand 7 states and 193 transitions. [2024-05-12 10:41:19,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 274 transitions, 3567 flow [2024-05-12 10:41:20,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 274 transitions, 3447 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-05-12 10:41:20,133 INFO L231 Difference]: Finished difference. Result has 227 places, 245 transitions, 2985 flow [2024-05-12 10:41:20,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2787, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2985, PETRI_PLACES=227, PETRI_TRANSITIONS=245} [2024-05-12 10:41:20,134 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 177 predicate places. [2024-05-12 10:41:20,134 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 245 transitions, 2985 flow [2024-05-12 10:41:20,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:20,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:20,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:20,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-05-12 10:41:20,134 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:20,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:20,135 INFO L85 PathProgramCache]: Analyzing trace with hash 842176481, now seen corresponding path program 1 times [2024-05-12 10:41:20,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:20,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680829686] [2024-05-12 10:41:20,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:20,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:20,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:20,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680829686] [2024-05-12 10:41:20,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680829686] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:20,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:20,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:20,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696758675] [2024-05-12 10:41:20,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:20,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:20,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:20,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:20,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:20,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:20,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 245 transitions, 2985 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:20,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:20,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:20,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:21,189 INFO L124 PetriNetUnfolderBase]: 3283/5542 cut-off events. [2024-05-12 10:41:21,189 INFO L125 PetriNetUnfolderBase]: For 176155/176194 co-relation queries the response was YES. [2024-05-12 10:41:21,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31752 conditions, 5542 events. 3283/5542 cut-off events. For 176155/176194 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 37967 event pairs, 1122 based on Foata normal form. 10/5339 useless extension candidates. Maximal degree in co-relation 31650. Up to 4780 conditions per place. [2024-05-12 10:41:21,242 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 179 selfloop transitions, 91 changer transitions 0/283 dead transitions. [2024-05-12 10:41:21,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 283 transitions, 3903 flow [2024-05-12 10:41:21,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:41:21,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:41:21,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 276 transitions. [2024-05-12 10:41:21,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-05-12 10:41:21,243 INFO L175 Difference]: Start difference. First operand has 227 places, 245 transitions, 2985 flow. Second operand 11 states and 276 transitions. [2024-05-12 10:41:21,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 283 transitions, 3903 flow [2024-05-12 10:41:21,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 283 transitions, 3739 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-05-12 10:41:21,727 INFO L231 Difference]: Finished difference. Result has 233 places, 251 transitions, 3085 flow [2024-05-12 10:41:21,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2821, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3085, PETRI_PLACES=233, PETRI_TRANSITIONS=251} [2024-05-12 10:41:21,727 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 183 predicate places. [2024-05-12 10:41:21,728 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 251 transitions, 3085 flow [2024-05-12 10:41:21,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:21,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:21,728 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] [2024-05-12 10:41:21,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-05-12 10:41:21,729 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:21,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:21,729 INFO L85 PathProgramCache]: Analyzing trace with hash -158321793, now seen corresponding path program 2 times [2024-05-12 10:41:21,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:21,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074463489] [2024-05-12 10:41:21,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:21,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:22,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:22,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074463489] [2024-05-12 10:41:22,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074463489] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:22,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:22,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:22,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394880214] [2024-05-12 10:41:22,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:22,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:22,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:22,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:22,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:22,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:22,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 251 transitions, 3085 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:22,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:22,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:22,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:22,878 INFO L124 PetriNetUnfolderBase]: 3300/5566 cut-off events. [2024-05-12 10:41:22,878 INFO L125 PetriNetUnfolderBase]: For 179683/179722 co-relation queries the response was YES. [2024-05-12 10:41:22,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31637 conditions, 5566 events. 3300/5566 cut-off events. For 179683/179722 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 37957 event pairs, 1122 based on Foata normal form. 10/5359 useless extension candidates. Maximal degree in co-relation 31534. Up to 4799 conditions per place. [2024-05-12 10:41:22,935 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 185 selfloop transitions, 89 changer transitions 0/287 dead transitions. [2024-05-12 10:41:22,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 287 transitions, 4135 flow [2024-05-12 10:41:22,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:41:22,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:41:22,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 272 transitions. [2024-05-12 10:41:22,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375494071146245 [2024-05-12 10:41:22,937 INFO L175 Difference]: Start difference. First operand has 233 places, 251 transitions, 3085 flow. Second operand 11 states and 272 transitions. [2024-05-12 10:41:22,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 287 transitions, 4135 flow [2024-05-12 10:41:23,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 287 transitions, 3970 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-05-12 10:41:23,543 INFO L231 Difference]: Finished difference. Result has 237 places, 257 transitions, 3192 flow [2024-05-12 10:41:23,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2926, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3192, PETRI_PLACES=237, PETRI_TRANSITIONS=257} [2024-05-12 10:41:23,544 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 187 predicate places. [2024-05-12 10:41:23,544 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 257 transitions, 3192 flow [2024-05-12 10:41:23,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:23,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:23,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:23,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-05-12 10:41:23,544 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:23,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:23,545 INFO L85 PathProgramCache]: Analyzing trace with hash -158023263, now seen corresponding path program 3 times [2024-05-12 10:41:23,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:23,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111979811] [2024-05-12 10:41:23,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:23,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:23,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:23,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111979811] [2024-05-12 10:41:23,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111979811] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:23,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:23,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:23,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926526125] [2024-05-12 10:41:23,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:23,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:23,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:23,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:23,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:23,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:23,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 257 transitions, 3192 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:23,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:23,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:23,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:24,790 INFO L124 PetriNetUnfolderBase]: 3307/5582 cut-off events. [2024-05-12 10:41:24,791 INFO L125 PetriNetUnfolderBase]: For 185058/185097 co-relation queries the response was YES. [2024-05-12 10:41:24,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31683 conditions, 5582 events. 3307/5582 cut-off events. For 185058/185097 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 38220 event pairs, 1129 based on Foata normal form. 10/5372 useless extension candidates. Maximal degree in co-relation 31581. Up to 4807 conditions per place. [2024-05-12 10:41:24,843 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 184 selfloop transitions, 88 changer transitions 0/285 dead transitions. [2024-05-12 10:41:24,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 285 transitions, 4075 flow [2024-05-12 10:41:24,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:41:24,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:41:24,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2024-05-12 10:41:24,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5413043478260869 [2024-05-12 10:41:24,844 INFO L175 Difference]: Start difference. First operand has 237 places, 257 transitions, 3192 flow. Second operand 10 states and 249 transitions. [2024-05-12 10:41:24,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 285 transitions, 4075 flow [2024-05-12 10:41:25,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 285 transitions, 3905 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-05-12 10:41:25,324 INFO L231 Difference]: Finished difference. Result has 240 places, 260 transitions, 3252 flow [2024-05-12 10:41:25,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3033, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3252, PETRI_PLACES=240, PETRI_TRANSITIONS=260} [2024-05-12 10:41:25,325 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 190 predicate places. [2024-05-12 10:41:25,325 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 260 transitions, 3252 flow [2024-05-12 10:41:25,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:25,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:25,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:25,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-05-12 10:41:25,325 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:25,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:25,326 INFO L85 PathProgramCache]: Analyzing trace with hash 659514145, now seen corresponding path program 4 times [2024-05-12 10:41:25,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:25,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087661291] [2024-05-12 10:41:25,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:25,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:25,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:25,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087661291] [2024-05-12 10:41:25,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087661291] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:25,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:25,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:25,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999586804] [2024-05-12 10:41:25,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:25,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:25,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:25,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:25,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:25,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:25,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 260 transitions, 3252 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:25,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:25,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:25,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:26,536 INFO L124 PetriNetUnfolderBase]: 3304/5581 cut-off events. [2024-05-12 10:41:26,536 INFO L125 PetriNetUnfolderBase]: For 188399/188439 co-relation queries the response was YES. [2024-05-12 10:41:26,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31682 conditions, 5581 events. 3304/5581 cut-off events. For 188399/188439 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 38243 event pairs, 1127 based on Foata normal form. 8/5370 useless extension candidates. Maximal degree in co-relation 31579. Up to 4932 conditions per place. [2024-05-12 10:41:26,593 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 235 selfloop transitions, 37 changer transitions 0/285 dead transitions. [2024-05-12 10:41:26,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 285 transitions, 3860 flow [2024-05-12 10:41:26,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:26,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:26,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-05-12 10:41:26,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-05-12 10:41:26,595 INFO L175 Difference]: Start difference. First operand has 240 places, 260 transitions, 3252 flow. Second operand 6 states and 168 transitions. [2024-05-12 10:41:26,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 285 transitions, 3860 flow [2024-05-12 10:41:27,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 285 transitions, 3695 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-05-12 10:41:27,055 INFO L231 Difference]: Finished difference. Result has 239 places, 260 transitions, 3171 flow [2024-05-12 10:41:27,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3087, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3171, PETRI_PLACES=239, PETRI_TRANSITIONS=260} [2024-05-12 10:41:27,055 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 189 predicate places. [2024-05-12 10:41:27,055 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 260 transitions, 3171 flow [2024-05-12 10:41:27,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:27,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:27,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:27,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-05-12 10:41:27,056 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:27,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:27,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1665438411, now seen corresponding path program 1 times [2024-05-12 10:41:27,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:27,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859504111] [2024-05-12 10:41:27,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:27,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:27,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:27,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859504111] [2024-05-12 10:41:27,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859504111] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:27,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:27,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:41:27,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864278850] [2024-05-12 10:41:27,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:27,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:41:27,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:27,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:41:27,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:41:27,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:27,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 260 transitions, 3171 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:27,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:27,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:27,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:28,250 INFO L124 PetriNetUnfolderBase]: 3340/5632 cut-off events. [2024-05-12 10:41:28,251 INFO L125 PetriNetUnfolderBase]: For 199516/199555 co-relation queries the response was YES. [2024-05-12 10:41:28,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32131 conditions, 5632 events. 3340/5632 cut-off events. For 199516/199555 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 38507 event pairs, 1127 based on Foata normal form. 11/5413 useless extension candidates. Maximal degree in co-relation 32027. Up to 4692 conditions per place. [2024-05-12 10:41:28,306 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 164 selfloop transitions, 122 changer transitions 0/299 dead transitions. [2024-05-12 10:41:28,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 299 transitions, 4233 flow [2024-05-12 10:41:28,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:41:28,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:41:28,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 299 transitions. [2024-05-12 10:41:28,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-05-12 10:41:28,308 INFO L175 Difference]: Start difference. First operand has 239 places, 260 transitions, 3171 flow. Second operand 12 states and 299 transitions. [2024-05-12 10:41:28,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 299 transitions, 4233 flow [2024-05-12 10:41:28,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 299 transitions, 4149 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-05-12 10:41:28,826 INFO L231 Difference]: Finished difference. Result has 246 places, 268 transitions, 3505 flow [2024-05-12 10:41:28,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3091, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3505, PETRI_PLACES=246, PETRI_TRANSITIONS=268} [2024-05-12 10:41:28,827 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 196 predicate places. [2024-05-12 10:41:28,827 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 268 transitions, 3505 flow [2024-05-12 10:41:28,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:28,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:28,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:28,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-05-12 10:41:28,828 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:28,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:28,828 INFO L85 PathProgramCache]: Analyzing trace with hash 668780107, now seen corresponding path program 2 times [2024-05-12 10:41:28,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:28,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788172767] [2024-05-12 10:41:28,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:28,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:29,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:29,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788172767] [2024-05-12 10:41:29,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788172767] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:29,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:29,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:41:29,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673003106] [2024-05-12 10:41:29,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:29,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:41:29,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:29,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:41:29,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:41:29,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:29,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 268 transitions, 3505 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:29,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:29,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:29,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:30,005 INFO L124 PetriNetUnfolderBase]: 3376/5689 cut-off events. [2024-05-12 10:41:30,006 INFO L125 PetriNetUnfolderBase]: For 207059/207099 co-relation queries the response was YES. [2024-05-12 10:41:30,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33250 conditions, 5689 events. 3376/5689 cut-off events. For 207059/207099 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 38924 event pairs, 1128 based on Foata normal form. 9/5459 useless extension candidates. Maximal degree in co-relation 33145. Up to 4916 conditions per place. [2024-05-12 10:41:30,061 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 204 selfloop transitions, 86 changer transitions 0/303 dead transitions. [2024-05-12 10:41:30,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 303 transitions, 4563 flow [2024-05-12 10:41:30,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:41:30,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:41:30,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-05-12 10:41:30,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5676328502415459 [2024-05-12 10:41:30,062 INFO L175 Difference]: Start difference. First operand has 246 places, 268 transitions, 3505 flow. Second operand 9 states and 235 transitions. [2024-05-12 10:41:30,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 303 transitions, 4563 flow [2024-05-12 10:41:30,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 303 transitions, 4210 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-05-12 10:41:30,634 INFO L231 Difference]: Finished difference. Result has 248 places, 276 transitions, 3503 flow [2024-05-12 10:41:30,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3208, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3503, PETRI_PLACES=248, PETRI_TRANSITIONS=276} [2024-05-12 10:41:30,635 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 198 predicate places. [2024-05-12 10:41:30,635 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 276 transitions, 3503 flow [2024-05-12 10:41:30,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:30,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:30,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:30,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-05-12 10:41:30,635 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:30,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:30,635 INFO L85 PathProgramCache]: Analyzing trace with hash 668774155, now seen corresponding path program 5 times [2024-05-12 10:41:30,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:30,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613629488] [2024-05-12 10:41:30,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:30,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:30,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:30,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:30,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613629488] [2024-05-12 10:41:30,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613629488] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:30,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:30,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:30,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267601662] [2024-05-12 10:41:30,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:30,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:30,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:30,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:30,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:31,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:31,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 276 transitions, 3503 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:31,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:31,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:31,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:31,754 INFO L124 PetriNetUnfolderBase]: 3373/5680 cut-off events. [2024-05-12 10:41:31,755 INFO L125 PetriNetUnfolderBase]: For 206139/206179 co-relation queries the response was YES. [2024-05-12 10:41:31,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32903 conditions, 5680 events. 3373/5680 cut-off events. For 206139/206179 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 38748 event pairs, 1118 based on Foata normal form. 8/5450 useless extension candidates. Maximal degree in co-relation 32798. Up to 4965 conditions per place. [2024-05-12 10:41:31,812 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 236 selfloop transitions, 49 changer transitions 0/298 dead transitions. [2024-05-12 10:41:31,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 298 transitions, 4129 flow [2024-05-12 10:41:31,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:41:31,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:41:31,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-05-12 10:41:31,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-05-12 10:41:31,813 INFO L175 Difference]: Start difference. First operand has 248 places, 276 transitions, 3503 flow. Second operand 6 states and 165 transitions. [2024-05-12 10:41:31,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 298 transitions, 4129 flow [2024-05-12 10:41:32,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 298 transitions, 3941 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-05-12 10:41:32,373 INFO L231 Difference]: Finished difference. Result has 249 places, 276 transitions, 3425 flow [2024-05-12 10:41:32,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3315, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3425, PETRI_PLACES=249, PETRI_TRANSITIONS=276} [2024-05-12 10:41:32,373 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 199 predicate places. [2024-05-12 10:41:32,373 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 276 transitions, 3425 flow [2024-05-12 10:41:32,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:32,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:32,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:32,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-05-12 10:41:32,374 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:32,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:32,374 INFO L85 PathProgramCache]: Analyzing trace with hash 668774527, now seen corresponding path program 3 times [2024-05-12 10:41:32,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:32,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504654376] [2024-05-12 10:41:32,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:32,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:32,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:32,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504654376] [2024-05-12 10:41:32,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504654376] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:32,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:32,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:41:32,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150269685] [2024-05-12 10:41:32,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:32,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:41:32,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:32,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:41:32,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:41:32,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:32,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 276 transitions, 3425 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:32,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:32,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:32,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:33,579 INFO L124 PetriNetUnfolderBase]: 3367/5672 cut-off events. [2024-05-12 10:41:33,580 INFO L125 PetriNetUnfolderBase]: For 209652/209692 co-relation queries the response was YES. [2024-05-12 10:41:33,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32658 conditions, 5672 events. 3367/5672 cut-off events. For 209652/209692 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 38801 event pairs, 1121 based on Foata normal form. 9/5443 useless extension candidates. Maximal degree in co-relation 32552. Up to 4906 conditions per place. [2024-05-12 10:41:33,633 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 202 selfloop transitions, 85 changer transitions 0/300 dead transitions. [2024-05-12 10:41:33,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 300 transitions, 4183 flow [2024-05-12 10:41:33,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:33,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-05-12 10:41:33,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5962732919254659 [2024-05-12 10:41:33,634 INFO L175 Difference]: Start difference. First operand has 249 places, 276 transitions, 3425 flow. Second operand 7 states and 192 transitions. [2024-05-12 10:41:33,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 300 transitions, 4183 flow [2024-05-12 10:41:34,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 300 transitions, 4060 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-05-12 10:41:34,186 INFO L231 Difference]: Finished difference. Result has 251 places, 276 transitions, 3481 flow [2024-05-12 10:41:34,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3304, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3481, PETRI_PLACES=251, PETRI_TRANSITIONS=276} [2024-05-12 10:41:34,187 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 201 predicate places. [2024-05-12 10:41:34,187 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 276 transitions, 3481 flow [2024-05-12 10:41:34,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:34,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:34,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:34,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-05-12 10:41:34,188 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:34,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:34,188 INFO L85 PathProgramCache]: Analyzing trace with hash 615269457, now seen corresponding path program 4 times [2024-05-12 10:41:34,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:34,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386321261] [2024-05-12 10:41:34,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:34,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:34,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:34,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386321261] [2024-05-12 10:41:34,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386321261] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:34,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:34,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:34,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926498389] [2024-05-12 10:41:34,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:34,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:34,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:34,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:34,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:34,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:34,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 276 transitions, 3481 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:34,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:34,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:34,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:35,439 INFO L124 PetriNetUnfolderBase]: 3424/5757 cut-off events. [2024-05-12 10:41:35,439 INFO L125 PetriNetUnfolderBase]: For 217943/217983 co-relation queries the response was YES. [2024-05-12 10:41:35,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33589 conditions, 5757 events. 3424/5757 cut-off events. For 217943/217983 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 39380 event pairs, 1122 based on Foata normal form. 9/5513 useless extension candidates. Maximal degree in co-relation 33483. Up to 4893 conditions per place. [2024-05-12 10:41:35,493 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 199 selfloop transitions, 100 changer transitions 0/312 dead transitions. [2024-05-12 10:41:35,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 312 transitions, 4595 flow [2024-05-12 10:41:35,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:41:35,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:41:35,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-05-12 10:41:35,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579710144927537 [2024-05-12 10:41:35,494 INFO L175 Difference]: Start difference. First operand has 251 places, 276 transitions, 3481 flow. Second operand 9 states and 231 transitions. [2024-05-12 10:41:35,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 312 transitions, 4595 flow [2024-05-12 10:41:36,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 312 transitions, 4417 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 10:41:36,220 INFO L231 Difference]: Finished difference. Result has 254 places, 286 transitions, 3660 flow [2024-05-12 10:41:36,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3311, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3660, PETRI_PLACES=254, PETRI_TRANSITIONS=286} [2024-05-12 10:41:36,221 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 204 predicate places. [2024-05-12 10:41:36,221 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 286 transitions, 3660 flow [2024-05-12 10:41:36,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:36,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:36,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:36,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-05-12 10:41:36,224 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:36,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:36,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1872118449, now seen corresponding path program 3 times [2024-05-12 10:41:36,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:36,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751622214] [2024-05-12 10:41:36,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:36,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:36,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:36,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751622214] [2024-05-12 10:41:36,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751622214] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:36,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:36,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:41:36,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940544554] [2024-05-12 10:41:36,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:36,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:41:36,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:36,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:41:36,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:41:36,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:36,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 286 transitions, 3660 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:36,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:36,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:36,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:37,427 INFO L124 PetriNetUnfolderBase]: 3572/6005 cut-off events. [2024-05-12 10:41:37,428 INFO L125 PetriNetUnfolderBase]: For 257392/257438 co-relation queries the response was YES. [2024-05-12 10:41:37,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35359 conditions, 6005 events. 3572/6005 cut-off events. For 257392/257438 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 41478 event pairs, 1166 based on Foata normal form. 23/5763 useless extension candidates. Maximal degree in co-relation 35252. Up to 5095 conditions per place. [2024-05-12 10:41:37,489 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 236 selfloop transitions, 62 changer transitions 0/311 dead transitions. [2024-05-12 10:41:37,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 311 transitions, 4382 flow [2024-05-12 10:41:37,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:37,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:37,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-05-12 10:41:37,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577639751552795 [2024-05-12 10:41:37,490 INFO L175 Difference]: Start difference. First operand has 254 places, 286 transitions, 3660 flow. Second operand 7 states and 186 transitions. [2024-05-12 10:41:37,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 311 transitions, 4382 flow [2024-05-12 10:41:38,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 311 transitions, 4260 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-05-12 10:41:38,117 INFO L231 Difference]: Finished difference. Result has 257 places, 288 transitions, 3718 flow [2024-05-12 10:41:38,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3718, PETRI_PLACES=257, PETRI_TRANSITIONS=288} [2024-05-12 10:41:38,117 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 207 predicate places. [2024-05-12 10:41:38,117 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 288 transitions, 3718 flow [2024-05-12 10:41:38,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:38,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:38,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:38,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-05-12 10:41:38,118 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:38,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:38,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1872518163, now seen corresponding path program 1 times [2024-05-12 10:41:38,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:38,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411618787] [2024-05-12 10:41:38,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:38,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:38,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:38,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:38,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411618787] [2024-05-12 10:41:38,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411618787] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:38,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:38,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:41:38,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650812605] [2024-05-12 10:41:38,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:38,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:41:38,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:38,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:41:38,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:41:38,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:38,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 288 transitions, 3718 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:38,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:38,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:38,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:39,404 INFO L124 PetriNetUnfolderBase]: 3803/6444 cut-off events. [2024-05-12 10:41:39,405 INFO L125 PetriNetUnfolderBase]: For 282126/282166 co-relation queries the response was YES. [2024-05-12 10:41:39,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38811 conditions, 6444 events. 3803/6444 cut-off events. For 282126/282166 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 45247 event pairs, 1223 based on Foata normal form. 19/6192 useless extension candidates. Maximal degree in co-relation 38702. Up to 4896 conditions per place. [2024-05-12 10:41:39,473 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 246 selfloop transitions, 62 changer transitions 0/321 dead transitions. [2024-05-12 10:41:39,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 321 transitions, 4662 flow [2024-05-12 10:41:39,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:39,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:39,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-05-12 10:41:39,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.593167701863354 [2024-05-12 10:41:39,475 INFO L175 Difference]: Start difference. First operand has 257 places, 288 transitions, 3718 flow. Second operand 7 states and 191 transitions. [2024-05-12 10:41:39,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 321 transitions, 4662 flow [2024-05-12 10:41:40,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 321 transitions, 4516 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-05-12 10:41:40,253 INFO L231 Difference]: Finished difference. Result has 260 places, 292 transitions, 3818 flow [2024-05-12 10:41:40,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3572, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3818, PETRI_PLACES=260, PETRI_TRANSITIONS=292} [2024-05-12 10:41:40,254 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 210 predicate places. [2024-05-12 10:41:40,254 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 292 transitions, 3818 flow [2024-05-12 10:41:40,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:40,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:40,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:40,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-05-12 10:41:40,254 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:40,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:40,254 INFO L85 PathProgramCache]: Analyzing trace with hash -872118943, now seen corresponding path program 5 times [2024-05-12 10:41:40,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:40,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667016812] [2024-05-12 10:41:40,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:40,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:40,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:40,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667016812] [2024-05-12 10:41:40,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667016812] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:40,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:40,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:40,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977169846] [2024-05-12 10:41:40,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:40,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:40,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:40,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:40,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:40,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:40,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 292 transitions, 3818 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:40,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:40,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:40,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:41,547 INFO L124 PetriNetUnfolderBase]: 3960/6636 cut-off events. [2024-05-12 10:41:41,547 INFO L125 PetriNetUnfolderBase]: For 277102/277174 co-relation queries the response was YES. [2024-05-12 10:41:41,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40855 conditions, 6636 events. 3960/6636 cut-off events. For 277102/277174 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 46532 event pairs, 1285 based on Foata normal form. 25/6353 useless extension candidates. Maximal degree in co-relation 40744. Up to 5738 conditions per place. [2024-05-12 10:41:41,615 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 259 selfloop transitions, 104 changer transitions 0/376 dead transitions. [2024-05-12 10:41:41,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 376 transitions, 5777 flow [2024-05-12 10:41:41,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:41:41,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:41:41,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 271 transitions. [2024-05-12 10:41:41,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5355731225296443 [2024-05-12 10:41:41,616 INFO L175 Difference]: Start difference. First operand has 260 places, 292 transitions, 3818 flow. Second operand 11 states and 271 transitions. [2024-05-12 10:41:41,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 376 transitions, 5777 flow [2024-05-12 10:41:42,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 376 transitions, 5648 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-05-12 10:41:42,206 INFO L231 Difference]: Finished difference. Result has 271 places, 339 transitions, 4802 flow [2024-05-12 10:41:42,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3710, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4802, PETRI_PLACES=271, PETRI_TRANSITIONS=339} [2024-05-12 10:41:42,206 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 221 predicate places. [2024-05-12 10:41:42,206 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 339 transitions, 4802 flow [2024-05-12 10:41:42,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:42,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:42,207 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] [2024-05-12 10:41:42,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-05-12 10:41:42,207 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:42,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:42,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1120898377, now seen corresponding path program 6 times [2024-05-12 10:41:42,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:42,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452217675] [2024-05-12 10:41:42,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:42,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:42,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:42,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452217675] [2024-05-12 10:41:42,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452217675] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:42,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:42,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:41:42,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957276552] [2024-05-12 10:41:42,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:42,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:41:42,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:42,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:41:42,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:41:42,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:42,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 339 transitions, 4802 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:42,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:42,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:42,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:43,738 INFO L124 PetriNetUnfolderBase]: 3974/6669 cut-off events. [2024-05-12 10:41:43,738 INFO L125 PetriNetUnfolderBase]: For 285053/285142 co-relation queries the response was YES. [2024-05-12 10:41:43,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41329 conditions, 6669 events. 3974/6669 cut-off events. For 285053/285142 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46823 event pairs, 1286 based on Foata normal form. 33/6398 useless extension candidates. Maximal degree in co-relation 41213. Up to 5766 conditions per place. [2024-05-12 10:41:43,803 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 248 selfloop transitions, 110 changer transitions 0/371 dead transitions. [2024-05-12 10:41:43,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 371 transitions, 5933 flow [2024-05-12 10:41:43,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:41:43,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:41:43,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-05-12 10:41:43,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5838509316770186 [2024-05-12 10:41:43,805 INFO L175 Difference]: Start difference. First operand has 271 places, 339 transitions, 4802 flow. Second operand 7 states and 188 transitions. [2024-05-12 10:41:43,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 371 transitions, 5933 flow [2024-05-12 10:41:44,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 371 transitions, 5794 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-05-12 10:41:44,603 INFO L231 Difference]: Finished difference. Result has 274 places, 350 transitions, 5159 flow [2024-05-12 10:41:44,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4675, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5159, PETRI_PLACES=274, PETRI_TRANSITIONS=350} [2024-05-12 10:41:44,604 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 224 predicate places. [2024-05-12 10:41:44,604 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 350 transitions, 5159 flow [2024-05-12 10:41:44,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:44,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:44,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:44,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-05-12 10:41:44,604 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:44,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:44,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1845030445, now seen corresponding path program 6 times [2024-05-12 10:41:44,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:44,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784008062] [2024-05-12 10:41:44,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:44,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:44,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:44,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784008062] [2024-05-12 10:41:44,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784008062] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:44,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:44,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:44,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492542029] [2024-05-12 10:41:44,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:44,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:44,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:44,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:44,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:44,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:44,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 350 transitions, 5159 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:44,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:44,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:44,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:45,947 INFO L124 PetriNetUnfolderBase]: 3981/6682 cut-off events. [2024-05-12 10:41:45,947 INFO L125 PetriNetUnfolderBase]: For 291497/291659 co-relation queries the response was YES. [2024-05-12 10:41:45,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41884 conditions, 6682 events. 3981/6682 cut-off events. For 291497/291659 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46903 event pairs, 1289 based on Foata normal form. 52/6420 useless extension candidates. Maximal degree in co-relation 41765. Up to 5744 conditions per place. [2024-05-12 10:41:46,022 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 265 selfloop transitions, 100 changer transitions 0/378 dead transitions. [2024-05-12 10:41:46,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 378 transitions, 6127 flow [2024-05-12 10:41:46,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:41:46,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:41:46,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 265 transitions. [2024-05-12 10:41:46,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5237154150197628 [2024-05-12 10:41:46,023 INFO L175 Difference]: Start difference. First operand has 274 places, 350 transitions, 5159 flow. Second operand 11 states and 265 transitions. [2024-05-12 10:41:46,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 378 transitions, 6127 flow [2024-05-12 10:41:46,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 378 transitions, 5924 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-05-12 10:41:46,801 INFO L231 Difference]: Finished difference. Result has 282 places, 353 transitions, 5206 flow [2024-05-12 10:41:46,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4956, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5206, PETRI_PLACES=282, PETRI_TRANSITIONS=353} [2024-05-12 10:41:46,802 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 232 predicate places. [2024-05-12 10:41:46,802 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 353 transitions, 5206 flow [2024-05-12 10:41:46,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:46,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:46,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:46,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-05-12 10:41:46,802 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:46,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:46,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1897849411, now seen corresponding path program 7 times [2024-05-12 10:41:46,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:46,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125215087] [2024-05-12 10:41:46,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:46,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:47,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:47,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:47,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125215087] [2024-05-12 10:41:47,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125215087] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:47,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:47,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:47,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871720154] [2024-05-12 10:41:47,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:47,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:47,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:47,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:47,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:47,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:47,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 353 transitions, 5206 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:47,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:47,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:47,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:48,182 INFO L124 PetriNetUnfolderBase]: 3988/6677 cut-off events. [2024-05-12 10:41:48,182 INFO L125 PetriNetUnfolderBase]: For 297859/297925 co-relation queries the response was YES. [2024-05-12 10:41:48,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42257 conditions, 6677 events. 3988/6677 cut-off events. For 297859/297925 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46751 event pairs, 1285 based on Foata normal form. 21/6382 useless extension candidates. Maximal degree in co-relation 42136. Up to 5772 conditions per place. [2024-05-12 10:41:48,258 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 267 selfloop transitions, 113 changer transitions 0/393 dead transitions. [2024-05-12 10:41:48,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 393 transitions, 6562 flow [2024-05-12 10:41:48,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:41:48,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:41:48,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 271 transitions. [2024-05-12 10:41:48,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5355731225296443 [2024-05-12 10:41:48,259 INFO L175 Difference]: Start difference. First operand has 282 places, 353 transitions, 5206 flow. Second operand 11 states and 271 transitions. [2024-05-12 10:41:48,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 393 transitions, 6562 flow [2024-05-12 10:41:49,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 393 transitions, 6356 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-05-12 10:41:49,119 INFO L231 Difference]: Finished difference. Result has 287 places, 360 transitions, 5414 flow [2024-05-12 10:41:49,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5013, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5414, PETRI_PLACES=287, PETRI_TRANSITIONS=360} [2024-05-12 10:41:49,120 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 237 predicate places. [2024-05-12 10:41:49,120 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 360 transitions, 5414 flow [2024-05-12 10:41:49,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:49,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:49,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:49,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-05-12 10:41:49,121 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:49,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:49,121 INFO L85 PathProgramCache]: Analyzing trace with hash -920914357, now seen corresponding path program 8 times [2024-05-12 10:41:49,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:49,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084799929] [2024-05-12 10:41:49,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:49,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:49,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:49,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:49,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084799929] [2024-05-12 10:41:49,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084799929] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:49,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:49,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:41:49,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978302284] [2024-05-12 10:41:49,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:49,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:41:49,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:49,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:41:49,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:41:49,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:49,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 360 transitions, 5414 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:49,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:49,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:49,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:50,732 INFO L124 PetriNetUnfolderBase]: 3982/6686 cut-off events. [2024-05-12 10:41:50,732 INFO L125 PetriNetUnfolderBase]: For 302520/302602 co-relation queries the response was YES. [2024-05-12 10:41:50,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42266 conditions, 6686 events. 3982/6686 cut-off events. For 302520/302602 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 46972 event pairs, 1293 based on Foata normal form. 29/6406 useless extension candidates. Maximal degree in co-relation 42143. Up to 5778 conditions per place. [2024-05-12 10:41:50,799 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 255 selfloop transitions, 117 changer transitions 0/385 dead transitions. [2024-05-12 10:41:50,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 385 transitions, 6419 flow [2024-05-12 10:41:50,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:41:50,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:41:50,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-05-12 10:41:50,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5507246376811594 [2024-05-12 10:41:50,800 INFO L175 Difference]: Start difference. First operand has 287 places, 360 transitions, 5414 flow. Second operand 9 states and 228 transitions. [2024-05-12 10:41:50,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 385 transitions, 6419 flow [2024-05-12 10:41:51,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 385 transitions, 6233 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-05-12 10:41:51,563 INFO L231 Difference]: Finished difference. Result has 290 places, 362 transitions, 5539 flow [2024-05-12 10:41:51,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5229, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5539, PETRI_PLACES=290, PETRI_TRANSITIONS=362} [2024-05-12 10:41:51,563 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 240 predicate places. [2024-05-12 10:41:51,563 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 362 transitions, 5539 flow [2024-05-12 10:41:51,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:51,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:51,564 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] [2024-05-12 10:41:51,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-05-12 10:41:51,564 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:51,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:51,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1506549521, now seen corresponding path program 7 times [2024-05-12 10:41:51,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:51,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601438980] [2024-05-12 10:41:51,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:51,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:51,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:51,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601438980] [2024-05-12 10:41:51,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601438980] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:51,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:51,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:51,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567408999] [2024-05-12 10:41:51,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:51,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:51,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:51,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:51,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:51,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:51,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 362 transitions, 5539 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:51,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:51,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:51,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:52,910 INFO L124 PetriNetUnfolderBase]: 3989/6699 cut-off events. [2024-05-12 10:41:52,911 INFO L125 PetriNetUnfolderBase]: For 308301/308467 co-relation queries the response was YES. [2024-05-12 10:41:52,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42388 conditions, 6699 events. 3989/6699 cut-off events. For 308301/308467 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 47067 event pairs, 1296 based on Foata normal form. 52/6432 useless extension candidates. Maximal degree in co-relation 42264. Up to 5753 conditions per place. [2024-05-12 10:41:52,989 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 272 selfloop transitions, 101 changer transitions 0/386 dead transitions. [2024-05-12 10:41:52,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 386 transitions, 6514 flow [2024-05-12 10:41:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:41:52,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:41:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-05-12 10:41:52,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532608695652174 [2024-05-12 10:41:52,990 INFO L175 Difference]: Start difference. First operand has 290 places, 362 transitions, 5539 flow. Second operand 10 states and 245 transitions. [2024-05-12 10:41:52,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 386 transitions, 6514 flow [2024-05-12 10:41:53,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 386 transitions, 6150 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-05-12 10:41:53,769 INFO L231 Difference]: Finished difference. Result has 292 places, 365 transitions, 5422 flow [2024-05-12 10:41:53,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5175, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5422, PETRI_PLACES=292, PETRI_TRANSITIONS=365} [2024-05-12 10:41:53,769 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 242 predicate places. [2024-05-12 10:41:53,770 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 365 transitions, 5422 flow [2024-05-12 10:41:53,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:53,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:53,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:53,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-05-12 10:41:53,770 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:53,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:53,770 INFO L85 PathProgramCache]: Analyzing trace with hash -2042439135, now seen corresponding path program 9 times [2024-05-12 10:41:53,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:53,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757081062] [2024-05-12 10:41:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:53,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:54,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:54,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757081062] [2024-05-12 10:41:54,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757081062] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:54,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:54,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:54,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636634100] [2024-05-12 10:41:54,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:54,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:54,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:54,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:54,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:54,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:54,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 365 transitions, 5422 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:54,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:54,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:54,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:55,155 INFO L124 PetriNetUnfolderBase]: 3996/6696 cut-off events. [2024-05-12 10:41:55,155 INFO L125 PetriNetUnfolderBase]: For 311871/311910 co-relation queries the response was YES. [2024-05-12 10:41:55,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42232 conditions, 6696 events. 3996/6696 cut-off events. For 311871/311910 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 46844 event pairs, 1262 based on Foata normal form. 1/6370 useless extension candidates. Maximal degree in co-relation 42108. Up to 6013 conditions per place. [2024-05-12 10:41:55,233 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 348 selfloop transitions, 29 changer transitions 0/390 dead transitions. [2024-05-12 10:41:55,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 390 transitions, 6312 flow [2024-05-12 10:41:55,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:41:55,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:41:55,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-05-12 10:41:55,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5065217391304347 [2024-05-12 10:41:55,234 INFO L175 Difference]: Start difference. First operand has 292 places, 365 transitions, 5422 flow. Second operand 10 states and 233 transitions. [2024-05-12 10:41:55,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 390 transitions, 6312 flow [2024-05-12 10:41:56,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 390 transitions, 6117 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-05-12 10:41:56,317 INFO L231 Difference]: Finished difference. Result has 295 places, 368 transitions, 5359 flow [2024-05-12 10:41:56,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5231, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5359, PETRI_PLACES=295, PETRI_TRANSITIONS=368} [2024-05-12 10:41:56,318 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 245 predicate places. [2024-05-12 10:41:56,318 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 368 transitions, 5359 flow [2024-05-12 10:41:56,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:56,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:56,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:56,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-05-12 10:41:56,318 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:56,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:56,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1152286109, now seen corresponding path program 10 times [2024-05-12 10:41:56,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:56,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822591874] [2024-05-12 10:41:56,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:56,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:56,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:56,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:56,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822591874] [2024-05-12 10:41:56,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822591874] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:56,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:56,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:41:56,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399662237] [2024-05-12 10:41:56,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:56,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:41:56,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:56,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:41:56,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:41:56,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:56,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 368 transitions, 5359 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:56,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:56,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:56,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:57,835 INFO L124 PetriNetUnfolderBase]: 4003/6700 cut-off events. [2024-05-12 10:41:57,836 INFO L125 PetriNetUnfolderBase]: For 319916/319982 co-relation queries the response was YES. [2024-05-12 10:41:57,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42162 conditions, 6700 events. 4003/6700 cut-off events. For 319916/319982 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46817 event pairs, 1285 based on Foata normal form. 21/6399 useless extension candidates. Maximal degree in co-relation 42037. Up to 5503 conditions per place. [2024-05-12 10:41:57,904 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 154 selfloop transitions, 230 changer transitions 0/397 dead transitions. [2024-05-12 10:41:57,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 397 transitions, 6603 flow [2024-05-12 10:41:57,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:41:57,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:41:57,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 276 transitions. [2024-05-12 10:41:57,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-05-12 10:41:57,906 INFO L175 Difference]: Start difference. First operand has 295 places, 368 transitions, 5359 flow. Second operand 11 states and 276 transitions. [2024-05-12 10:41:57,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 397 transitions, 6603 flow [2024-05-12 10:41:58,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 397 transitions, 6511 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-05-12 10:41:58,855 INFO L231 Difference]: Finished difference. Result has 301 places, 374 transitions, 5955 flow [2024-05-12 10:41:58,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5267, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5955, PETRI_PLACES=301, PETRI_TRANSITIONS=374} [2024-05-12 10:41:58,856 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 251 predicate places. [2024-05-12 10:41:58,856 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 374 transitions, 5955 flow [2024-05-12 10:41:58,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:58,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:58,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:58,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-05-12 10:41:58,857 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:58,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:58,857 INFO L85 PathProgramCache]: Analyzing trace with hash -2095375281, now seen corresponding path program 8 times [2024-05-12 10:41:58,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:58,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745073950] [2024-05-12 10:41:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:58,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:59,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:59,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745073950] [2024-05-12 10:41:59,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745073950] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:59,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:59,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:41:59,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146025950] [2024-05-12 10:41:59,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:59,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:41:59,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:59,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:41:59,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:41:59,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:59,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 374 transitions, 5955 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:59,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:59,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:59,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:00,167 INFO L124 PetriNetUnfolderBase]: 4010/6725 cut-off events. [2024-05-12 10:42:00,167 INFO L125 PetriNetUnfolderBase]: For 332304/332471 co-relation queries the response was YES. [2024-05-12 10:42:00,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43350 conditions, 6725 events. 4010/6725 cut-off events. For 332304/332471 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 47173 event pairs, 1289 based on Foata normal form. 52/6453 useless extension candidates. Maximal degree in co-relation 43223. Up to 5779 conditions per place. [2024-05-12 10:42:00,250 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 280 selfloop transitions, 101 changer transitions 0/394 dead transitions. [2024-05-12 10:42:00,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 394 transitions, 6949 flow [2024-05-12 10:42:00,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:42:00,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:42:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-05-12 10:42:00,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.533816425120773 [2024-05-12 10:42:00,252 INFO L175 Difference]: Start difference. First operand has 301 places, 374 transitions, 5955 flow. Second operand 9 states and 221 transitions. [2024-05-12 10:42:00,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 394 transitions, 6949 flow [2024-05-12 10:42:01,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 394 transitions, 6632 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-05-12 10:42:01,233 INFO L231 Difference]: Finished difference. Result has 303 places, 377 transitions, 5892 flow [2024-05-12 10:42:01,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5640, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5892, PETRI_PLACES=303, PETRI_TRANSITIONS=377} [2024-05-12 10:42:01,234 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 253 predicate places. [2024-05-12 10:42:01,234 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 377 transitions, 5892 flow [2024-05-12 10:42:01,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:01,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:01,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:01,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-05-12 10:42:01,235 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:01,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:01,235 INFO L85 PathProgramCache]: Analyzing trace with hash -2050420485, now seen corresponding path program 11 times [2024-05-12 10:42:01,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:01,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940788355] [2024-05-12 10:42:01,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:01,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:01,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:01,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940788355] [2024-05-12 10:42:01,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940788355] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:01,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:01,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:42:01,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305524083] [2024-05-12 10:42:01,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:01,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:42:01,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:01,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:42:01,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:42:01,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:01,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 377 transitions, 5892 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:01,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:01,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:01,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:02,684 INFO L124 PetriNetUnfolderBase]: 4041/6764 cut-off events. [2024-05-12 10:42:02,684 INFO L125 PetriNetUnfolderBase]: For 341971/342010 co-relation queries the response was YES. [2024-05-12 10:42:02,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43427 conditions, 6764 events. 4041/6764 cut-off events. For 341971/342010 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 47279 event pairs, 1264 based on Foata normal form. 2/6427 useless extension candidates. Maximal degree in co-relation 43300. Up to 6034 conditions per place. [2024-05-12 10:42:02,761 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 337 selfloop transitions, 59 changer transitions 0/409 dead transitions. [2024-05-12 10:42:02,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 409 transitions, 7128 flow [2024-05-12 10:42:02,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:42:02,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:42:02,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-05-12 10:42:02,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5289855072463768 [2024-05-12 10:42:02,762 INFO L175 Difference]: Start difference. First operand has 303 places, 377 transitions, 5892 flow. Second operand 9 states and 219 transitions. [2024-05-12 10:42:02,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 409 transitions, 7128 flow [2024-05-12 10:42:03,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 409 transitions, 6950 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:03,807 INFO L231 Difference]: Finished difference. Result has 308 places, 389 transitions, 6124 flow [2024-05-12 10:42:03,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5714, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6124, PETRI_PLACES=308, PETRI_TRANSITIONS=389} [2024-05-12 10:42:03,808 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 258 predicate places. [2024-05-12 10:42:03,808 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 389 transitions, 6124 flow [2024-05-12 10:42:03,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:03,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:03,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:03,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-05-12 10:42:03,808 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:03,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:03,809 INFO L85 PathProgramCache]: Analyzing trace with hash -736870687, now seen corresponding path program 12 times [2024-05-12 10:42:03,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:03,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651012741] [2024-05-12 10:42:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:03,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:04,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:04,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651012741] [2024-05-12 10:42:04,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651012741] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:04,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:04,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:42:04,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299629900] [2024-05-12 10:42:04,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:04,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:42:04,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:04,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:42:04,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:42:04,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:04,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 389 transitions, 6124 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:04,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:04,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:04,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:05,448 INFO L124 PetriNetUnfolderBase]: 4069/6799 cut-off events. [2024-05-12 10:42:05,448 INFO L125 PetriNetUnfolderBase]: For 350917/350956 co-relation queries the response was YES. [2024-05-12 10:42:05,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43817 conditions, 6799 events. 4069/6799 cut-off events. For 350917/350956 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 47448 event pairs, 1257 based on Foata normal form. 2/6455 useless extension candidates. Maximal degree in co-relation 43688. Up to 6062 conditions per place. [2024-05-12 10:42:05,519 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 339 selfloop transitions, 71 changer transitions 0/423 dead transitions. [2024-05-12 10:42:05,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 423 transitions, 7409 flow [2024-05-12 10:42:05,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:42:05,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:42:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-05-12 10:42:05,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5118577075098815 [2024-05-12 10:42:05,520 INFO L175 Difference]: Start difference. First operand has 308 places, 389 transitions, 6124 flow. Second operand 11 states and 259 transitions. [2024-05-12 10:42:05,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 423 transitions, 7409 flow [2024-05-12 10:42:06,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 423 transitions, 7257 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-05-12 10:42:06,726 INFO L231 Difference]: Finished difference. Result has 315 places, 401 transitions, 6387 flow [2024-05-12 10:42:06,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6000, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6387, PETRI_PLACES=315, PETRI_TRANSITIONS=401} [2024-05-12 10:42:06,727 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 265 predicate places. [2024-05-12 10:42:06,727 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 401 transitions, 6387 flow [2024-05-12 10:42:06,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:06,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:06,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:06,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-05-12 10:42:06,728 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:06,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:06,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1479067071, now seen corresponding path program 13 times [2024-05-12 10:42:06,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:06,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677245715] [2024-05-12 10:42:06,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:06,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:07,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:07,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677245715] [2024-05-12 10:42:07,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677245715] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:07,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:07,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:42:07,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109620590] [2024-05-12 10:42:07,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:07,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:42:07,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:07,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:42:07,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:42:07,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:07,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 401 transitions, 6387 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:07,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:07,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:07,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:08,320 INFO L124 PetriNetUnfolderBase]: 4063/6793 cut-off events. [2024-05-12 10:42:08,321 INFO L125 PetriNetUnfolderBase]: For 352656/352695 co-relation queries the response was YES. [2024-05-12 10:42:08,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43645 conditions, 6793 events. 4063/6793 cut-off events. For 352656/352695 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 47477 event pairs, 1257 based on Foata normal form. 2/6449 useless extension candidates. Maximal degree in co-relation 43515. Up to 6074 conditions per place. [2024-05-12 10:42:08,411 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 353 selfloop transitions, 52 changer transitions 0/418 dead transitions. [2024-05-12 10:42:08,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 418 transitions, 7239 flow [2024-05-12 10:42:08,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:08,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:08,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-05-12 10:42:08,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496894409937888 [2024-05-12 10:42:08,413 INFO L175 Difference]: Start difference. First operand has 315 places, 401 transitions, 6387 flow. Second operand 7 states and 177 transitions. [2024-05-12 10:42:08,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 418 transitions, 7239 flow [2024-05-12 10:42:09,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 418 transitions, 6967 flow, removed 65 selfloop flow, removed 8 redundant places. [2024-05-12 10:42:09,856 INFO L231 Difference]: Finished difference. Result has 314 places, 401 transitions, 6229 flow [2024-05-12 10:42:09,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6115, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6229, PETRI_PLACES=314, PETRI_TRANSITIONS=401} [2024-05-12 10:42:09,857 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 264 predicate places. [2024-05-12 10:42:09,857 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 401 transitions, 6229 flow [2024-05-12 10:42:09,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:09,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:09,857 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] [2024-05-12 10:42:09,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-05-12 10:42:09,857 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:09,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:09,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1478650989, now seen corresponding path program 9 times [2024-05-12 10:42:09,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:09,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395639769] [2024-05-12 10:42:09,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:09,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:10,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:10,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395639769] [2024-05-12 10:42:10,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395639769] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:10,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:10,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:42:10,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799924045] [2024-05-12 10:42:10,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:10,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:42:10,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:10,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:42:10,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:42:10,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:10,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 401 transitions, 6229 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:10,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:10,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:10,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:11,390 INFO L124 PetriNetUnfolderBase]: 4060/6813 cut-off events. [2024-05-12 10:42:11,390 INFO L125 PetriNetUnfolderBase]: For 356824/356979 co-relation queries the response was YES. [2024-05-12 10:42:11,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43503 conditions, 6813 events. 4060/6813 cut-off events. For 356824/356979 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 47835 event pairs, 1301 based on Foata normal form. 47/6525 useless extension candidates. Maximal degree in co-relation 43372. Up to 5882 conditions per place. [2024-05-12 10:42:11,479 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 337 selfloop transitions, 70 changer transitions 0/420 dead transitions. [2024-05-12 10:42:11,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 420 transitions, 7091 flow [2024-05-12 10:42:11,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:11,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:11,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-05-12 10:42:11,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5905797101449275 [2024-05-12 10:42:11,480 INFO L175 Difference]: Start difference. First operand has 314 places, 401 transitions, 6229 flow. Second operand 6 states and 163 transitions. [2024-05-12 10:42:11,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 420 transitions, 7091 flow [2024-05-12 10:42:12,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 420 transitions, 6969 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-05-12 10:42:12,642 INFO L231 Difference]: Finished difference. Result has 314 places, 401 transitions, 6258 flow [2024-05-12 10:42:12,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6107, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6258, PETRI_PLACES=314, PETRI_TRANSITIONS=401} [2024-05-12 10:42:12,643 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 264 predicate places. [2024-05-12 10:42:12,643 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 401 transitions, 6258 flow [2024-05-12 10:42:12,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:12,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:12,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:12,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-05-12 10:42:12,643 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:12,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:12,644 INFO L85 PathProgramCache]: Analyzing trace with hash -342969533, now seen corresponding path program 14 times [2024-05-12 10:42:12,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:12,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441808411] [2024-05-12 10:42:12,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:12,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:12,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:12,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441808411] [2024-05-12 10:42:12,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441808411] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:12,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:12,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:42:12,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6183602] [2024-05-12 10:42:12,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:12,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:42:12,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:12,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:42:12,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:42:13,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:13,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 401 transitions, 6258 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:13,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:13,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:13,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:14,347 INFO L124 PetriNetUnfolderBase]: 4064/6804 cut-off events. [2024-05-12 10:42:14,347 INFO L125 PetriNetUnfolderBase]: For 364377/364453 co-relation queries the response was YES. [2024-05-12 10:42:14,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43712 conditions, 6804 events. 4064/6804 cut-off events. For 364377/364453 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 47652 event pairs, 1286 based on Foata normal form. 24/6491 useless extension candidates. Maximal degree in co-relation 43580. Up to 5748 conditions per place. [2024-05-12 10:42:14,420 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 216 selfloop transitions, 197 changer transitions 0/426 dead transitions. [2024-05-12 10:42:14,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 426 transitions, 7523 flow [2024-05-12 10:42:14,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:14,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:14,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-05-12 10:42:14,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.593167701863354 [2024-05-12 10:42:14,421 INFO L175 Difference]: Start difference. First operand has 314 places, 401 transitions, 6258 flow. Second operand 7 states and 191 transitions. [2024-05-12 10:42:14,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 426 transitions, 7523 flow [2024-05-12 10:42:15,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 426 transitions, 7354 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:15,546 INFO L231 Difference]: Finished difference. Result has 316 places, 404 transitions, 6569 flow [2024-05-12 10:42:15,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6093, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6569, PETRI_PLACES=316, PETRI_TRANSITIONS=404} [2024-05-12 10:42:15,547 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 266 predicate places. [2024-05-12 10:42:15,547 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 404 transitions, 6569 flow [2024-05-12 10:42:15,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:15,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:15,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:15,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-05-12 10:42:15,548 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:15,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:15,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1029171057, now seen corresponding path program 15 times [2024-05-12 10:42:15,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:15,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444222864] [2024-05-12 10:42:15,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:15,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:15,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:15,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444222864] [2024-05-12 10:42:15,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444222864] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:15,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:15,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:42:15,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236476666] [2024-05-12 10:42:15,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:15,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:42:15,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:15,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:42:15,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:42:15,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:15,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 404 transitions, 6569 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:15,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:15,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:15,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:17,058 INFO L124 PetriNetUnfolderBase]: 4135/6909 cut-off events. [2024-05-12 10:42:17,059 INFO L125 PetriNetUnfolderBase]: For 363496/363551 co-relation queries the response was YES. [2024-05-12 10:42:17,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44965 conditions, 6909 events. 4135/6909 cut-off events. For 363496/363551 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 48365 event pairs, 1266 based on Foata normal form. 14/6562 useless extension candidates. Maximal degree in co-relation 44833. Up to 5890 conditions per place. [2024-05-12 10:42:17,143 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 312 selfloop transitions, 136 changer transitions 0/461 dead transitions. [2024-05-12 10:42:17,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 461 transitions, 8340 flow [2024-05-12 10:42:17,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:17,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:17,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-05-12 10:42:17,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6118012422360248 [2024-05-12 10:42:17,144 INFO L175 Difference]: Start difference. First operand has 316 places, 404 transitions, 6569 flow. Second operand 7 states and 197 transitions. [2024-05-12 10:42:17,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 461 transitions, 8340 flow [2024-05-12 10:42:18,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 461 transitions, 7820 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:18,373 INFO L231 Difference]: Finished difference. Result has 320 places, 429 transitions, 7036 flow [2024-05-12 10:42:18,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6081, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7036, PETRI_PLACES=320, PETRI_TRANSITIONS=429} [2024-05-12 10:42:18,374 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 270 predicate places. [2024-05-12 10:42:18,374 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 429 transitions, 7036 flow [2024-05-12 10:42:18,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:18,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:18,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:18,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-05-12 10:42:18,374 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:18,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:18,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1206302577, now seen corresponding path program 16 times [2024-05-12 10:42:18,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:18,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328394161] [2024-05-12 10:42:18,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:18,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:18,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:18,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328394161] [2024-05-12 10:42:18,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328394161] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:18,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:18,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:42:18,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276767007] [2024-05-12 10:42:18,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:18,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:42:18,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:18,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:42:18,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:42:18,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:18,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 429 transitions, 7036 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:18,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:18,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:18,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:19,878 INFO L124 PetriNetUnfolderBase]: 4132/6900 cut-off events. [2024-05-12 10:42:19,878 INFO L125 PetriNetUnfolderBase]: For 363733/363772 co-relation queries the response was YES. [2024-05-12 10:42:19,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44928 conditions, 6900 events. 4132/6900 cut-off events. For 363733/363772 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 48145 event pairs, 1257 based on Foata normal form. 1/6539 useless extension candidates. Maximal degree in co-relation 44794. Up to 5888 conditions per place. [2024-05-12 10:42:19,958 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 295 selfloop transitions, 162 changer transitions 0/470 dead transitions. [2024-05-12 10:42:19,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 470 transitions, 8470 flow [2024-05-12 10:42:19,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:42:19,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:42:19,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-05-12 10:42:19,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5990338164251208 [2024-05-12 10:42:19,959 INFO L175 Difference]: Start difference. First operand has 320 places, 429 transitions, 7036 flow. Second operand 9 states and 248 transitions. [2024-05-12 10:42:19,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 470 transitions, 8470 flow [2024-05-12 10:42:21,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 470 transitions, 8227 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:21,111 INFO L231 Difference]: Finished difference. Result has 325 places, 432 transitions, 7281 flow [2024-05-12 10:42:21,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6793, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7281, PETRI_PLACES=325, PETRI_TRANSITIONS=432} [2024-05-12 10:42:21,112 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 275 predicate places. [2024-05-12 10:42:21,112 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 432 transitions, 7281 flow [2024-05-12 10:42:21,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:21,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:21,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:21,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-05-12 10:42:21,113 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:21,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:21,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1206539727, now seen corresponding path program 17 times [2024-05-12 10:42:21,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:21,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450709909] [2024-05-12 10:42:21,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:21,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:21,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:21,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450709909] [2024-05-12 10:42:21,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450709909] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:21,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:21,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:42:21,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275413794] [2024-05-12 10:42:21,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:21,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:42:21,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:21,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:42:21,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:42:21,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:21,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 432 transitions, 7281 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:21,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:21,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:21,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:22,712 INFO L124 PetriNetUnfolderBase]: 4129/6896 cut-off events. [2024-05-12 10:42:22,713 INFO L125 PetriNetUnfolderBase]: For 369151/369190 co-relation queries the response was YES. [2024-05-12 10:42:22,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45124 conditions, 6896 events. 4129/6896 cut-off events. For 369151/369190 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 48248 event pairs, 1257 based on Foata normal form. 1/6535 useless extension candidates. Maximal degree in co-relation 44988. Up to 5886 conditions per place. [2024-05-12 10:42:22,800 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 291 selfloop transitions, 165 changer transitions 0/469 dead transitions. [2024-05-12 10:42:22,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 469 transitions, 8476 flow [2024-05-12 10:42:22,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:42:22,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:42:22,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-05-12 10:42:22,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942028985507246 [2024-05-12 10:42:22,801 INFO L175 Difference]: Start difference. First operand has 325 places, 432 transitions, 7281 flow. Second operand 9 states and 246 transitions. [2024-05-12 10:42:22,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 469 transitions, 8476 flow [2024-05-12 10:42:24,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 469 transitions, 8145 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-05-12 10:42:24,093 INFO L231 Difference]: Finished difference. Result has 327 places, 432 transitions, 7315 flow [2024-05-12 10:42:24,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6952, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7315, PETRI_PLACES=327, PETRI_TRANSITIONS=432} [2024-05-12 10:42:24,094 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 277 predicate places. [2024-05-12 10:42:24,094 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 432 transitions, 7315 flow [2024-05-12 10:42:24,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:24,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:24,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:24,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-05-12 10:42:24,094 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:24,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:24,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1029047925, now seen corresponding path program 4 times [2024-05-12 10:42:24,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:24,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842888155] [2024-05-12 10:42:24,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:24,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:24,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:24,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842888155] [2024-05-12 10:42:24,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842888155] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:24,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:24,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:42:24,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30181724] [2024-05-12 10:42:24,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:24,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:42:24,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:24,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:42:24,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:42:24,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:24,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 432 transitions, 7315 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:24,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:24,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:24,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:25,580 INFO L124 PetriNetUnfolderBase]: 4093/6849 cut-off events. [2024-05-12 10:42:25,581 INFO L125 PetriNetUnfolderBase]: For 365528/365583 co-relation queries the response was YES. [2024-05-12 10:42:25,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43621 conditions, 6849 events. 4093/6849 cut-off events. For 365528/365583 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 47751 event pairs, 953 based on Foata normal form. 28/6521 useless extension candidates. Maximal degree in co-relation 43484. Up to 5709 conditions per place. [2024-05-12 10:42:25,670 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 366 selfloop transitions, 84 changer transitions 0/463 dead transitions. [2024-05-12 10:42:25,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 463 transitions, 8317 flow [2024-05-12 10:42:25,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:25,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:25,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-05-12 10:42:25,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-05-12 10:42:25,671 INFO L175 Difference]: Start difference. First operand has 327 places, 432 transitions, 7315 flow. Second operand 6 states and 177 transitions. [2024-05-12 10:42:25,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 463 transitions, 8317 flow [2024-05-12 10:42:26,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 463 transitions, 8047 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-05-12 10:42:26,819 INFO L231 Difference]: Finished difference. Result has 324 places, 432 transitions, 7227 flow [2024-05-12 10:42:26,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7045, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7227, PETRI_PLACES=324, PETRI_TRANSITIONS=432} [2024-05-12 10:42:26,819 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 274 predicate places. [2024-05-12 10:42:26,819 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 432 transitions, 7227 flow [2024-05-12 10:42:26,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:26,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:26,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:26,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-05-12 10:42:26,820 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:26,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:26,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1029447639, now seen corresponding path program 2 times [2024-05-12 10:42:26,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:26,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53557199] [2024-05-12 10:42:26,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:26,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:27,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:27,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53557199] [2024-05-12 10:42:27,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53557199] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:27,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:27,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:42:27,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154279792] [2024-05-12 10:42:27,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:27,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:42:27,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:27,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:42:27,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:42:27,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:27,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 432 transitions, 7227 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:27,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:27,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:27,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:28,490 INFO L124 PetriNetUnfolderBase]: 4324/7233 cut-off events. [2024-05-12 10:42:28,490 INFO L125 PetriNetUnfolderBase]: For 371847/371903 co-relation queries the response was YES. [2024-05-12 10:42:28,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46455 conditions, 7233 events. 4324/7233 cut-off events. For 371847/371903 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 51010 event pairs, 1005 based on Foata normal form. 24/6898 useless extension candidates. Maximal degree in co-relation 46320. Up to 5590 conditions per place. [2024-05-12 10:42:28,568 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 381 selfloop transitions, 73 changer transitions 0/467 dead transitions. [2024-05-12 10:42:28,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 467 transitions, 8507 flow [2024-05-12 10:42:28,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:42:28,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:42:28,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-05-12 10:42:28,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 10:42:28,569 INFO L175 Difference]: Start difference. First operand has 324 places, 432 transitions, 7227 flow. Second operand 6 states and 174 transitions. [2024-05-12 10:42:28,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 467 transitions, 8507 flow [2024-05-12 10:42:29,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 467 transitions, 8323 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:29,795 INFO L231 Difference]: Finished difference. Result has 326 places, 436 transitions, 7334 flow [2024-05-12 10:42:29,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7043, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7334, PETRI_PLACES=326, PETRI_TRANSITIONS=436} [2024-05-12 10:42:29,796 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 276 predicate places. [2024-05-12 10:42:29,796 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 436 transitions, 7334 flow [2024-05-12 10:42:29,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:29,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:29,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:29,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-05-12 10:42:29,796 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:29,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:29,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1472276439, now seen corresponding path program 3 times [2024-05-12 10:42:29,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:29,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326595745] [2024-05-12 10:42:29,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:29,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:30,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:30,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:30,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326595745] [2024-05-12 10:42:30,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326595745] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:30,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:30,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:42:30,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065805620] [2024-05-12 10:42:30,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:30,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:42:30,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:30,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:42:30,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:42:30,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:30,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 436 transitions, 7334 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:30,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:30,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:30,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:31,349 INFO L124 PetriNetUnfolderBase]: 4411/7376 cut-off events. [2024-05-12 10:42:31,349 INFO L125 PetriNetUnfolderBase]: For 370653/370708 co-relation queries the response was YES. [2024-05-12 10:42:31,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47654 conditions, 7376 events. 4411/7376 cut-off events. For 370653/370708 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 52274 event pairs, 967 based on Foata normal form. 24/7045 useless extension candidates. Maximal degree in co-relation 47517. Up to 5359 conditions per place. [2024-05-12 10:42:31,437 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 382 selfloop transitions, 82 changer transitions 0/477 dead transitions. [2024-05-12 10:42:31,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 477 transitions, 8802 flow [2024-05-12 10:42:31,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:31,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:31,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-05-12 10:42:31,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242236024844721 [2024-05-12 10:42:31,439 INFO L175 Difference]: Start difference. First operand has 326 places, 436 transitions, 7334 flow. Second operand 7 states and 201 transitions. [2024-05-12 10:42:31,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 477 transitions, 8802 flow [2024-05-12 10:42:32,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 477 transitions, 8685 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-05-12 10:42:32,906 INFO L231 Difference]: Finished difference. Result has 332 places, 439 transitions, 7483 flow [2024-05-12 10:42:32,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7217, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7483, PETRI_PLACES=332, PETRI_TRANSITIONS=439} [2024-05-12 10:42:32,907 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 282 predicate places. [2024-05-12 10:42:32,907 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 439 transitions, 7483 flow [2024-05-12 10:42:32,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:32,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:32,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:32,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-05-12 10:42:32,907 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:32,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:32,907 INFO L85 PathProgramCache]: Analyzing trace with hash -336967313, now seen corresponding path program 1 times [2024-05-12 10:42:32,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:32,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096649119] [2024-05-12 10:42:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:32,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:33,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:33,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096649119] [2024-05-12 10:42:33,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096649119] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:33,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:33,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:42:33,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105750117] [2024-05-12 10:42:33,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:33,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:42:33,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:33,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:42:33,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:42:33,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:33,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 439 transitions, 7483 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:33,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:33,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:33,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:34,579 INFO L124 PetriNetUnfolderBase]: 4538/7601 cut-off events. [2024-05-12 10:42:34,579 INFO L125 PetriNetUnfolderBase]: For 364984/365020 co-relation queries the response was YES. [2024-05-12 10:42:34,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49068 conditions, 7601 events. 4538/7601 cut-off events. For 364984/365020 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 54436 event pairs, 1452 based on Foata normal form. 6/7236 useless extension candidates. Maximal degree in co-relation 48928. Up to 6632 conditions per place. [2024-05-12 10:42:34,674 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 407 selfloop transitions, 51 changer transitions 0/471 dead transitions. [2024-05-12 10:42:34,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 471 transitions, 8542 flow [2024-05-12 10:42:34,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:42:34,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:42:34,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-05-12 10:42:34,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-05-12 10:42:34,675 INFO L175 Difference]: Start difference. First operand has 332 places, 439 transitions, 7483 flow. Second operand 9 states and 225 transitions. [2024-05-12 10:42:34,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 471 transitions, 8542 flow [2024-05-12 10:42:36,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 471 transitions, 8325 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-05-12 10:42:36,284 INFO L231 Difference]: Finished difference. Result has 338 places, 441 transitions, 7424 flow [2024-05-12 10:42:36,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7266, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7424, PETRI_PLACES=338, PETRI_TRANSITIONS=441} [2024-05-12 10:42:36,285 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 288 predicate places. [2024-05-12 10:42:36,285 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 441 transitions, 7424 flow [2024-05-12 10:42:36,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:36,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:36,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:36,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-05-12 10:42:36,286 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:36,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:36,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1206763857, now seen corresponding path program 2 times [2024-05-12 10:42:36,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:36,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522570372] [2024-05-12 10:42:36,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:36,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:36,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:36,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522570372] [2024-05-12 10:42:36,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522570372] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:36,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:36,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:42:36,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885148205] [2024-05-12 10:42:36,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:36,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:42:36,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:36,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:42:36,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:42:36,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:36,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 441 transitions, 7424 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:36,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:36,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:36,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:38,213 INFO L124 PetriNetUnfolderBase]: 4591/7750 cut-off events. [2024-05-12 10:42:38,213 INFO L125 PetriNetUnfolderBase]: For 370520/370556 co-relation queries the response was YES. [2024-05-12 10:42:38,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48701 conditions, 7750 events. 4591/7750 cut-off events. For 370520/370556 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 56076 event pairs, 1392 based on Foata normal form. 6/7390 useless extension candidates. Maximal degree in co-relation 48559. Up to 6505 conditions per place. [2024-05-12 10:42:38,294 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 406 selfloop transitions, 55 changer transitions 0/474 dead transitions. [2024-05-12 10:42:38,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 474 transitions, 8490 flow [2024-05-12 10:42:38,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:38,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-05-12 10:42:38,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5900621118012422 [2024-05-12 10:42:38,295 INFO L175 Difference]: Start difference. First operand has 338 places, 441 transitions, 7424 flow. Second operand 7 states and 190 transitions. [2024-05-12 10:42:38,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 474 transitions, 8490 flow [2024-05-12 10:42:39,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 474 transitions, 8400 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:39,630 INFO L231 Difference]: Finished difference. Result has 340 places, 442 transitions, 7474 flow [2024-05-12 10:42:39,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7334, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7474, PETRI_PLACES=340, PETRI_TRANSITIONS=442} [2024-05-12 10:42:39,631 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 290 predicate places. [2024-05-12 10:42:39,631 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 442 transitions, 7474 flow [2024-05-12 10:42:39,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:39,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:39,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:39,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-05-12 10:42:39,631 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:39,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:39,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1472461137, now seen corresponding path program 3 times [2024-05-12 10:42:39,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:39,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396494706] [2024-05-12 10:42:39,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:39,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:39,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:39,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396494706] [2024-05-12 10:42:39,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396494706] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:39,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:39,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:42:39,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129324806] [2024-05-12 10:42:39,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:39,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:42:39,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:39,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:42:39,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:42:40,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:40,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 442 transitions, 7474 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:40,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:40,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:40,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:41,287 INFO L124 PetriNetUnfolderBase]: 4578/7764 cut-off events. [2024-05-12 10:42:41,287 INFO L125 PetriNetUnfolderBase]: For 351592/351647 co-relation queries the response was YES. [2024-05-12 10:42:41,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48152 conditions, 7764 events. 4578/7764 cut-off events. For 351592/351647 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 56300 event pairs, 1349 based on Foata normal form. 18/7410 useless extension candidates. Maximal degree in co-relation 48009. Up to 6388 conditions per place. [2024-05-12 10:42:41,382 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 406 selfloop transitions, 55 changer transitions 0/474 dead transitions. [2024-05-12 10:42:41,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 474 transitions, 8520 flow [2024-05-12 10:42:41,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:41,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-05-12 10:42:41,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-05-12 10:42:41,383 INFO L175 Difference]: Start difference. First operand has 340 places, 442 transitions, 7474 flow. Second operand 7 states and 189 transitions. [2024-05-12 10:42:41,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 474 transitions, 8520 flow [2024-05-12 10:42:43,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 474 transitions, 8396 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:43,044 INFO L231 Difference]: Finished difference. Result has 342 places, 442 transitions, 7464 flow [2024-05-12 10:42:43,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7350, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7464, PETRI_PLACES=342, PETRI_TRANSITIONS=442} [2024-05-12 10:42:43,045 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 292 predicate places. [2024-05-12 10:42:43,045 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 442 transitions, 7464 flow [2024-05-12 10:42:43,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:43,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:43,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:43,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-05-12 10:42:43,045 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:43,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:43,045 INFO L85 PathProgramCache]: Analyzing trace with hash -606603094, now seen corresponding path program 1 times [2024-05-12 10:42:43,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:43,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720379179] [2024-05-12 10:42:43,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:43,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:43,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:43,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:43,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720379179] [2024-05-12 10:42:43,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720379179] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:43,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:43,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:42:43,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491679349] [2024-05-12 10:42:43,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:43,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:42:43,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:43,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:42:43,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:42:43,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:43,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 442 transitions, 7464 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:43,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:43,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:43,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:44,709 INFO L124 PetriNetUnfolderBase]: 4791/8055 cut-off events. [2024-05-12 10:42:44,709 INFO L125 PetriNetUnfolderBase]: For 401687/401736 co-relation queries the response was YES. [2024-05-12 10:42:44,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50570 conditions, 8055 events. 4791/8055 cut-off events. For 401687/401736 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 58266 event pairs, 1517 based on Foata normal form. 16/7686 useless extension candidates. Maximal degree in co-relation 50426. Up to 6489 conditions per place. [2024-05-12 10:42:44,814 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 338 selfloop transitions, 139 changer transitions 0/490 dead transitions. [2024-05-12 10:42:44,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 490 transitions, 8834 flow [2024-05-12 10:42:44,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:42:44,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:42:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 306 transitions. [2024-05-12 10:42:44,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543478260869565 [2024-05-12 10:42:44,815 INFO L175 Difference]: Start difference. First operand has 342 places, 442 transitions, 7464 flow. Second operand 12 states and 306 transitions. [2024-05-12 10:42:44,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 490 transitions, 8834 flow [2024-05-12 10:42:46,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 490 transitions, 8681 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-05-12 10:42:46,533 INFO L231 Difference]: Finished difference. Result has 348 places, 446 transitions, 7702 flow [2024-05-12 10:42:46,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7311, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7702, PETRI_PLACES=348, PETRI_TRANSITIONS=446} [2024-05-12 10:42:46,533 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 298 predicate places. [2024-05-12 10:42:46,533 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 446 transitions, 7702 flow [2024-05-12 10:42:46,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:46,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:46,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:46,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-05-12 10:42:46,534 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:46,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:46,534 INFO L85 PathProgramCache]: Analyzing trace with hash -603746134, now seen corresponding path program 2 times [2024-05-12 10:42:46,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:46,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98475280] [2024-05-12 10:42:46,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:46,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:46,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:46,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98475280] [2024-05-12 10:42:46,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98475280] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:46,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:46,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:42:46,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355698669] [2024-05-12 10:42:46,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:46,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:42:46,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:46,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:42:46,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:42:46,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:46,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 446 transitions, 7702 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:46,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:46,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:46,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:48,514 INFO L124 PetriNetUnfolderBase]: 4886/8167 cut-off events. [2024-05-12 10:42:48,514 INFO L125 PetriNetUnfolderBase]: For 413166/413219 co-relation queries the response was YES. [2024-05-12 10:42:48,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51510 conditions, 8167 events. 4886/8167 cut-off events. For 413166/413219 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 59096 event pairs, 1630 based on Foata normal form. 16/7787 useless extension candidates. Maximal degree in co-relation 51366. Up to 6983 conditions per place. [2024-05-12 10:42:48,614 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 334 selfloop transitions, 135 changer transitions 0/482 dead transitions. [2024-05-12 10:42:48,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 482 transitions, 8800 flow [2024-05-12 10:42:48,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:42:48,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:42:48,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 297 transitions. [2024-05-12 10:42:48,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380434782608695 [2024-05-12 10:42:48,616 INFO L175 Difference]: Start difference. First operand has 348 places, 446 transitions, 7702 flow. Second operand 12 states and 297 transitions. [2024-05-12 10:42:48,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 482 transitions, 8800 flow [2024-05-12 10:42:50,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 482 transitions, 8620 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-05-12 10:42:50,308 INFO L231 Difference]: Finished difference. Result has 353 places, 448 transitions, 7858 flow [2024-05-12 10:42:50,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7542, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7858, PETRI_PLACES=353, PETRI_TRANSITIONS=448} [2024-05-12 10:42:50,309 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 303 predicate places. [2024-05-12 10:42:50,309 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 448 transitions, 7858 flow [2024-05-12 10:42:50,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:50,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:50,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:50,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-05-12 10:42:50,310 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:50,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:50,310 INFO L85 PathProgramCache]: Analyzing trace with hash -742829952, now seen corresponding path program 3 times [2024-05-12 10:42:50,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:50,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055499013] [2024-05-12 10:42:50,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:50,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:50,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:50,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055499013] [2024-05-12 10:42:50,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055499013] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:50,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:50,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:42:50,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209305383] [2024-05-12 10:42:50,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:50,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:42:50,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:50,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:42:50,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:42:50,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:50,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 448 transitions, 7858 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:50,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:50,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:50,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:52,187 INFO L124 PetriNetUnfolderBase]: 4863/8191 cut-off events. [2024-05-12 10:42:52,187 INFO L125 PetriNetUnfolderBase]: For 375962/376025 co-relation queries the response was YES. [2024-05-12 10:42:52,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50561 conditions, 8191 events. 4863/8191 cut-off events. For 375962/376025 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 59689 event pairs, 1562 based on Foata normal form. 22/7822 useless extension candidates. Maximal degree in co-relation 50415. Up to 6909 conditions per place. [2024-05-12 10:42:52,318 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 402 selfloop transitions, 65 changer transitions 0/480 dead transitions. [2024-05-12 10:42:52,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 480 transitions, 8894 flow [2024-05-12 10:42:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:42:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:42:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-05-12 10:42:52,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055900621118012 [2024-05-12 10:42:52,319 INFO L175 Difference]: Start difference. First operand has 353 places, 448 transitions, 7858 flow. Second operand 7 states and 195 transitions. [2024-05-12 10:42:52,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 480 transitions, 8894 flow [2024-05-12 10:42:54,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 480 transitions, 8582 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-05-12 10:42:54,158 INFO L231 Difference]: Finished difference. Result has 350 places, 448 transitions, 7690 flow [2024-05-12 10:42:54,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7546, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7690, PETRI_PLACES=350, PETRI_TRANSITIONS=448} [2024-05-12 10:42:54,159 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 300 predicate places. [2024-05-12 10:42:54,160 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 448 transitions, 7690 flow [2024-05-12 10:42:54,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:54,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:54,160 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] [2024-05-12 10:42:54,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-05-12 10:42:54,160 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:54,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:54,160 INFO L85 PathProgramCache]: Analyzing trace with hash -613007167, now seen corresponding path program 1 times [2024-05-12 10:42:54,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:54,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711445067] [2024-05-12 10:42:54,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:54,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:54,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:54,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711445067] [2024-05-12 10:42:54,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711445067] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:54,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:54,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:42:54,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983684388] [2024-05-12 10:42:54,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:54,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:42:54,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:54,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:42:54,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:42:54,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:54,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 448 transitions, 7690 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:54,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:54,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:54,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:56,080 INFO L124 PetriNetUnfolderBase]: 4915/8215 cut-off events. [2024-05-12 10:42:56,080 INFO L125 PetriNetUnfolderBase]: For 365155/365207 co-relation queries the response was YES. [2024-05-12 10:42:56,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51088 conditions, 8215 events. 4915/8215 cut-off events. For 365155/365207 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 59507 event pairs, 1628 based on Foata normal form. 7/7810 useless extension candidates. Maximal degree in co-relation 50941. Up to 6792 conditions per place. [2024-05-12 10:42:56,199 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 220 selfloop transitions, 261 changer transitions 0/494 dead transitions. [2024-05-12 10:42:56,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 494 transitions, 9460 flow [2024-05-12 10:42:56,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:42:56,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:42:56,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 296 transitions. [2024-05-12 10:42:56,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2024-05-12 10:42:56,201 INFO L175 Difference]: Start difference. First operand has 350 places, 448 transitions, 7690 flow. Second operand 12 states and 296 transitions. [2024-05-12 10:42:56,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 494 transitions, 9460 flow [2024-05-12 10:42:58,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 494 transitions, 9322 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-05-12 10:42:58,336 INFO L231 Difference]: Finished difference. Result has 356 places, 463 transitions, 8316 flow [2024-05-12 10:42:58,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7552, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8316, PETRI_PLACES=356, PETRI_TRANSITIONS=463} [2024-05-12 10:42:58,337 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 306 predicate places. [2024-05-12 10:42:58,337 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 463 transitions, 8316 flow [2024-05-12 10:42:58,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:58,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:58,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:42:58,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-05-12 10:42:58,337 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:58,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:58,337 INFO L85 PathProgramCache]: Analyzing trace with hash -779240947, now seen corresponding path program 2 times [2024-05-12 10:42:58,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:58,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392926407] [2024-05-12 10:42:58,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:58,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:58,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:58,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392926407] [2024-05-12 10:42:58,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392926407] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:58,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:58,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:42:58,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573558130] [2024-05-12 10:42:58,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:58,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:42:58,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:58,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:42:58,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:42:58,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:58,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 463 transitions, 8316 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:58,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:58,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:58,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:00,318 INFO L124 PetriNetUnfolderBase]: 4912/8211 cut-off events. [2024-05-12 10:43:00,318 INFO L125 PetriNetUnfolderBase]: For 371384/371437 co-relation queries the response was YES. [2024-05-12 10:43:00,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51546 conditions, 8211 events. 4912/8211 cut-off events. For 371384/371437 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 59478 event pairs, 1628 based on Foata normal form. 7/7806 useless extension candidates. Maximal degree in co-relation 51398. Up to 6789 conditions per place. [2024-05-12 10:43:00,417 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 197 selfloop transitions, 286 changer transitions 0/496 dead transitions. [2024-05-12 10:43:00,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 496 transitions, 9698 flow [2024-05-12 10:43:00,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:43:00,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:43:00,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 300 transitions. [2024-05-12 10:43:00,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-05-12 10:43:00,418 INFO L175 Difference]: Start difference. First operand has 356 places, 463 transitions, 8316 flow. Second operand 12 states and 300 transitions. [2024-05-12 10:43:00,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 496 transitions, 9698 flow [2024-05-12 10:43:02,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 496 transitions, 9382 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-05-12 10:43:02,440 INFO L231 Difference]: Finished difference. Result has 361 places, 463 transitions, 8578 flow [2024-05-12 10:43:02,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8000, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8578, PETRI_PLACES=361, PETRI_TRANSITIONS=463} [2024-05-12 10:43:02,441 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 311 predicate places. [2024-05-12 10:43:02,441 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 463 transitions, 8578 flow [2024-05-12 10:43:02,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:02,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:02,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:02,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-05-12 10:43:02,442 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:02,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:02,442 INFO L85 PathProgramCache]: Analyzing trace with hash -858116565, now seen corresponding path program 3 times [2024-05-12 10:43:02,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:02,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904302012] [2024-05-12 10:43:02,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:02,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:02,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:02,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904302012] [2024-05-12 10:43:02,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904302012] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:02,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:02,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:43:02,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070639866] [2024-05-12 10:43:02,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:02,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:43:02,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:02,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:43:02,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:43:02,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:43:02,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 463 transitions, 8578 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:02,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:02,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:43:02,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:04,299 INFO L124 PetriNetUnfolderBase]: 4920/8228 cut-off events. [2024-05-12 10:43:04,299 INFO L125 PetriNetUnfolderBase]: For 381805/381860 co-relation queries the response was YES. [2024-05-12 10:43:04,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51851 conditions, 8228 events. 4920/8228 cut-off events. For 381805/381860 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 59644 event pairs, 1601 based on Foata normal form. 7/7816 useless extension candidates. Maximal degree in co-relation 51702. Up to 6798 conditions per place. [2024-05-12 10:43:04,426 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 235 selfloop transitions, 245 changer transitions 0/493 dead transitions. [2024-05-12 10:43:04,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 493 transitions, 10164 flow [2024-05-12 10:43:04,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:43:04,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:43:04,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 274 transitions. [2024-05-12 10:43:04,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541501976284585 [2024-05-12 10:43:04,427 INFO L175 Difference]: Start difference. First operand has 361 places, 463 transitions, 8578 flow. Second operand 11 states and 274 transitions. [2024-05-12 10:43:04,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 493 transitions, 10164 flow [2024-05-12 10:43:06,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 493 transitions, 9857 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-05-12 10:43:06,391 INFO L231 Difference]: Finished difference. Result has 365 places, 466 transitions, 8820 flow [2024-05-12 10:43:06,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8274, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8820, PETRI_PLACES=365, PETRI_TRANSITIONS=466} [2024-05-12 10:43:06,391 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 315 predicate places. [2024-05-12 10:43:06,391 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 466 transitions, 8820 flow [2024-05-12 10:43:06,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:06,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:06,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:06,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-05-12 10:43:06,392 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:06,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:06,392 INFO L85 PathProgramCache]: Analyzing trace with hash -905938551, now seen corresponding path program 4 times [2024-05-12 10:43:06,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:06,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836328966] [2024-05-12 10:43:06,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:06,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:06,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:06,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836328966] [2024-05-12 10:43:06,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836328966] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:06,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:06,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:43:06,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995671537] [2024-05-12 10:43:06,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:06,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:43:06,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:06,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:43:06,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:43:06,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:43:06,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 466 transitions, 8820 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:06,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:06,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:43:06,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:08,259 INFO L124 PetriNetUnfolderBase]: 4939/8254 cut-off events. [2024-05-12 10:43:08,259 INFO L125 PetriNetUnfolderBase]: For 396022/396088 co-relation queries the response was YES. [2024-05-12 10:43:08,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52241 conditions, 8254 events. 4939/8254 cut-off events. For 396022/396088 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 59772 event pairs, 1597 based on Foata normal form. 13/7844 useless extension candidates. Maximal degree in co-relation 52091. Up to 7184 conditions per place. [2024-05-12 10:43:08,383 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 369 selfloop transitions, 120 changer transitions 0/502 dead transitions. [2024-05-12 10:43:08,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 502 transitions, 10306 flow [2024-05-12 10:43:08,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:43:08,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:43:08,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-05-12 10:43:08,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5676328502415459 [2024-05-12 10:43:08,384 INFO L175 Difference]: Start difference. First operand has 365 places, 466 transitions, 8820 flow. Second operand 9 states and 235 transitions. [2024-05-12 10:43:08,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 502 transitions, 10306 flow [2024-05-12 10:43:10,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 502 transitions, 9849 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-05-12 10:43:10,523 INFO L231 Difference]: Finished difference. Result has 366 places, 472 transitions, 8699 flow [2024-05-12 10:43:10,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8369, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8699, PETRI_PLACES=366, PETRI_TRANSITIONS=472} [2024-05-12 10:43:10,524 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 316 predicate places. [2024-05-12 10:43:10,524 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 472 transitions, 8699 flow [2024-05-12 10:43:10,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:10,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:10,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:10,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-05-12 10:43:10,525 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:10,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:10,525 INFO L85 PathProgramCache]: Analyzing trace with hash -858127725, now seen corresponding path program 5 times [2024-05-12 10:43:10,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:10,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386824024] [2024-05-12 10:43:10,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:10,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:10,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:10,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386824024] [2024-05-12 10:43:10,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386824024] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:10,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:10,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:43:10,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197649160] [2024-05-12 10:43:10,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:10,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:43:10,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:10,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:43:10,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:43:10,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:43:10,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 472 transitions, 8699 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:10,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:10,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:43:10,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:12,280 INFO L124 PetriNetUnfolderBase]: 4936/8247 cut-off events. [2024-05-12 10:43:12,280 INFO L125 PetriNetUnfolderBase]: For 395558/395611 co-relation queries the response was YES. [2024-05-12 10:43:12,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51556 conditions, 8247 events. 4936/8247 cut-off events. For 395558/395611 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 59696 event pairs, 1628 based on Foata normal form. 7/7833 useless extension candidates. Maximal degree in co-relation 51406. Up to 6816 conditions per place. [2024-05-12 10:43:12,389 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 236 selfloop transitions, 249 changer transitions 0/498 dead transitions. [2024-05-12 10:43:12,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 498 transitions, 10079 flow [2024-05-12 10:43:12,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:43:12,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:43:12,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 274 transitions. [2024-05-12 10:43:12,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541501976284585 [2024-05-12 10:43:12,391 INFO L175 Difference]: Start difference. First operand has 366 places, 472 transitions, 8699 flow. Second operand 11 states and 274 transitions. [2024-05-12 10:43:12,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 498 transitions, 10079 flow [2024-05-12 10:43:14,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 498 transitions, 9855 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-05-12 10:43:14,924 INFO L231 Difference]: Finished difference. Result has 372 places, 472 transitions, 8979 flow [2024-05-12 10:43:14,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8475, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8979, PETRI_PLACES=372, PETRI_TRANSITIONS=472} [2024-05-12 10:43:14,925 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 322 predicate places. [2024-05-12 10:43:14,925 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 472 transitions, 8979 flow [2024-05-12 10:43:14,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:14,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:14,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:14,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-05-12 10:43:14,925 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:14,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:14,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1029896865, now seen corresponding path program 6 times [2024-05-12 10:43:14,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:14,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365794308] [2024-05-12 10:43:14,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:14,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:15,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:15,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365794308] [2024-05-12 10:43:15,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365794308] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:15,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:15,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:43:15,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283296196] [2024-05-12 10:43:15,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:15,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:43:15,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:15,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:43:15,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:43:15,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:43:15,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 472 transitions, 8979 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:15,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:15,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:43:15,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:16,742 INFO L124 PetriNetUnfolderBase]: 4933/8246 cut-off events. [2024-05-12 10:43:16,743 INFO L125 PetriNetUnfolderBase]: For 403494/403559 co-relation queries the response was YES. [2024-05-12 10:43:16,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52028 conditions, 8246 events. 4933/8246 cut-off events. For 403494/403559 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 59744 event pairs, 1597 based on Foata normal form. 13/7836 useless extension candidates. Maximal degree in co-relation 51877. Up to 7177 conditions per place. [2024-05-12 10:43:16,852 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 368 selfloop transitions, 118 changer transitions 0/499 dead transitions. [2024-05-12 10:43:16,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 499 transitions, 10195 flow [2024-05-12 10:43:16,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:43:16,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:43:16,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-05-12 10:43:16,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993788819875776 [2024-05-12 10:43:16,853 INFO L175 Difference]: Start difference. First operand has 372 places, 472 transitions, 8979 flow. Second operand 7 states and 193 transitions. [2024-05-12 10:43:16,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 499 transitions, 10195 flow [2024-05-12 10:43:19,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 499 transitions, 9760 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-05-12 10:43:19,516 INFO L231 Difference]: Finished difference. Result has 370 places, 472 transitions, 8787 flow [2024-05-12 10:43:19,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8544, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8787, PETRI_PLACES=370, PETRI_TRANSITIONS=472} [2024-05-12 10:43:19,516 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 320 predicate places. [2024-05-12 10:43:19,516 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 472 transitions, 8787 flow [2024-05-12 10:43:19,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:19,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:19,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:19,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-05-12 10:43:19,517 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:19,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:19,517 INFO L85 PathProgramCache]: Analyzing trace with hash -742645254, now seen corresponding path program 1 times [2024-05-12 10:43:19,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:19,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300286632] [2024-05-12 10:43:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:19,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:19,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:19,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300286632] [2024-05-12 10:43:19,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300286632] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:19,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:19,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:43:19,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712402153] [2024-05-12 10:43:19,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:19,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:43:19,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:19,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:43:19,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:43:19,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:43:19,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 472 transitions, 8787 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:19,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:19,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:43:19,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:21,369 INFO L124 PetriNetUnfolderBase]: 5028/8418 cut-off events. [2024-05-12 10:43:21,369 INFO L125 PetriNetUnfolderBase]: For 444952/445016 co-relation queries the response was YES. [2024-05-12 10:43:21,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52705 conditions, 8418 events. 5028/8418 cut-off events. For 444952/445016 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 61168 event pairs, 1655 based on Foata normal form. 22/8014 useless extension candidates. Maximal degree in co-relation 52553. Up to 7250 conditions per place. [2024-05-12 10:43:21,484 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 394 selfloop transitions, 93 changer transitions 0/500 dead transitions. [2024-05-12 10:43:21,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 500 transitions, 9898 flow [2024-05-12 10:43:21,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:43:21,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:43:21,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-05-12 10:43:21,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5900621118012422 [2024-05-12 10:43:21,485 INFO L175 Difference]: Start difference. First operand has 370 places, 472 transitions, 8787 flow. Second operand 7 states and 190 transitions. [2024-05-12 10:43:21,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 500 transitions, 9898 flow [2024-05-12 10:43:23,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 500 transitions, 9576 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-05-12 10:43:23,996 INFO L231 Difference]: Finished difference. Result has 370 places, 474 transitions, 8712 flow [2024-05-12 10:43:23,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8465, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8712, PETRI_PLACES=370, PETRI_TRANSITIONS=474} [2024-05-12 10:43:23,997 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 320 predicate places. [2024-05-12 10:43:23,997 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 474 transitions, 8712 flow [2024-05-12 10:43:23,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:23,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:23,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:23,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-05-12 10:43:23,998 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:23,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:23,998 INFO L85 PathProgramCache]: Analyzing trace with hash -488277427, now seen corresponding path program 7 times [2024-05-12 10:43:23,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:23,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249186197] [2024-05-12 10:43:23,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:23,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:24,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:24,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249186197] [2024-05-12 10:43:24,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249186197] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:24,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:24,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:43:24,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132844091] [2024-05-12 10:43:24,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:24,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:43:24,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:24,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:43:24,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:43:24,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:43:24,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 474 transitions, 8712 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:24,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:24,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:43:24,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:25,845 INFO L124 PetriNetUnfolderBase]: 5036/8413 cut-off events. [2024-05-12 10:43:25,846 INFO L125 PetriNetUnfolderBase]: For 416358/416425 co-relation queries the response was YES. [2024-05-12 10:43:25,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52885 conditions, 8413 events. 5036/8413 cut-off events. For 416358/416425 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 61053 event pairs, 1662 based on Foata normal form. 13/7993 useless extension candidates. Maximal degree in co-relation 52732. Up to 7152 conditions per place. [2024-05-12 10:43:25,966 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 317 selfloop transitions, 172 changer transitions 0/502 dead transitions. [2024-05-12 10:43:25,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 502 transitions, 10332 flow [2024-05-12 10:43:25,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:43:25,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:43:25,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-05-12 10:43:25,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579710144927537 [2024-05-12 10:43:25,968 INFO L175 Difference]: Start difference. First operand has 370 places, 474 transitions, 8712 flow. Second operand 9 states and 231 transitions. [2024-05-12 10:43:25,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 502 transitions, 10332 flow [2024-05-12 10:43:28,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 502 transitions, 10122 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-05-12 10:43:28,669 INFO L231 Difference]: Finished difference. Result has 374 places, 477 transitions, 8898 flow [2024-05-12 10:43:28,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8502, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8898, PETRI_PLACES=374, PETRI_TRANSITIONS=477} [2024-05-12 10:43:28,669 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 324 predicate places. [2024-05-12 10:43:28,669 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 477 transitions, 8898 flow [2024-05-12 10:43:28,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:28,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:28,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:28,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-05-12 10:43:28,670 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:28,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:28,670 INFO L85 PathProgramCache]: Analyzing trace with hash 93619987, now seen corresponding path program 8 times [2024-05-12 10:43:28,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:28,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453552373] [2024-05-12 10:43:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:28,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:28,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:28,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453552373] [2024-05-12 10:43:28,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453552373] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:28,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:28,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:43:28,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779945652] [2024-05-12 10:43:28,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:28,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:43:28,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:28,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:43:28,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:43:29,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:43:29,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 477 transitions, 8898 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:29,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:29,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:43:29,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:30,620 INFO L124 PetriNetUnfolderBase]: 5044/8430 cut-off events. [2024-05-12 10:43:30,620 INFO L125 PetriNetUnfolderBase]: For 425896/425961 co-relation queries the response was YES. [2024-05-12 10:43:30,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53032 conditions, 8430 events. 5044/8430 cut-off events. For 425896/425961 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 61260 event pairs, 1655 based on Foata normal form. 13/8009 useless extension candidates. Maximal degree in co-relation 52878. Up to 7161 conditions per place. [2024-05-12 10:43:30,720 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 307 selfloop transitions, 186 changer transitions 0/506 dead transitions. [2024-05-12 10:43:30,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 506 transitions, 10540 flow [2024-05-12 10:43:30,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:43:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:43:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-05-12 10:43:30,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5456521739130434 [2024-05-12 10:43:30,721 INFO L175 Difference]: Start difference. First operand has 374 places, 477 transitions, 8898 flow. Second operand 10 states and 251 transitions. [2024-05-12 10:43:30,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 506 transitions, 10540 flow [2024-05-12 10:43:33,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 506 transitions, 10244 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-05-12 10:43:33,422 INFO L231 Difference]: Finished difference. Result has 379 places, 480 transitions, 9028 flow [2024-05-12 10:43:33,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8605, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9028, PETRI_PLACES=379, PETRI_TRANSITIONS=480} [2024-05-12 10:43:33,422 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 329 predicate places. [2024-05-12 10:43:33,422 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 480 transitions, 9028 flow [2024-05-12 10:43:33,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:33,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:33,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:33,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-05-12 10:43:33,423 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:33,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:33,423 INFO L85 PathProgramCache]: Analyzing trace with hash 93452587, now seen corresponding path program 9 times [2024-05-12 10:43:33,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:33,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042340361] [2024-05-12 10:43:33,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:33,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:33,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:33,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042340361] [2024-05-12 10:43:33,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042340361] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:33,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:33,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:43:33,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135484581] [2024-05-12 10:43:33,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:33,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:43:33,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:33,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:43:33,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:43:33,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:43:33,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 480 transitions, 9028 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:33,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:33,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:43:33,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:35,237 INFO L124 PetriNetUnfolderBase]: 5041/8426 cut-off events. [2024-05-12 10:43:35,237 INFO L125 PetriNetUnfolderBase]: For 429506/429571 co-relation queries the response was YES. [2024-05-12 10:43:35,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53071 conditions, 8426 events. 5041/8426 cut-off events. For 429506/429571 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 61266 event pairs, 1655 based on Foata normal form. 13/8005 useless extension candidates. Maximal degree in co-relation 52916. Up to 7158 conditions per place. [2024-05-12 10:43:35,348 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 323 selfloop transitions, 166 changer transitions 0/502 dead transitions. [2024-05-12 10:43:35,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 502 transitions, 10428 flow [2024-05-12 10:43:35,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:43:35,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:43:35,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-05-12 10:43:35,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807453416149069 [2024-05-12 10:43:35,349 INFO L175 Difference]: Start difference. First operand has 379 places, 480 transitions, 9028 flow. Second operand 7 states and 187 transitions. [2024-05-12 10:43:35,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 502 transitions, 10428 flow [2024-05-12 10:43:37,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 502 transitions, 10040 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-05-12 10:43:37,809 INFO L231 Difference]: Finished difference. Result has 378 places, 480 transitions, 8981 flow [2024-05-12 10:43:37,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8640, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8981, PETRI_PLACES=378, PETRI_TRANSITIONS=480} [2024-05-12 10:43:37,809 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 328 predicate places. [2024-05-12 10:43:37,810 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 480 transitions, 8981 flow [2024-05-12 10:43:37,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:37,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:37,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:37,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-05-12 10:43:37,810 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:37,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:37,811 INFO L85 PathProgramCache]: Analyzing trace with hash -742836555, now seen corresponding path program 10 times [2024-05-12 10:43:37,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:37,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973707372] [2024-05-12 10:43:37,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:37,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:38,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:38,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973707372] [2024-05-12 10:43:38,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973707372] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:38,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:38,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:43:38,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21110216] [2024-05-12 10:43:38,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:38,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:43:38,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:38,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:43:38,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:43:38,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:43:38,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 480 transitions, 8981 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:38,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:38,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:43:38,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:39,659 INFO L124 PetriNetUnfolderBase]: 5038/8427 cut-off events. [2024-05-12 10:43:39,659 INFO L125 PetriNetUnfolderBase]: For 433917/433986 co-relation queries the response was YES. [2024-05-12 10:43:39,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52991 conditions, 8427 events. 5038/8427 cut-off events. For 433917/433986 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 61277 event pairs, 1628 based on Foata normal form. 13/8002 useless extension candidates. Maximal degree in co-relation 52835. Up to 7155 conditions per place. [2024-05-12 10:43:39,772 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 315 selfloop transitions, 177 changer transitions 0/505 dead transitions. [2024-05-12 10:43:39,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 505 transitions, 10399 flow [2024-05-12 10:43:39,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:43:39,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:43:39,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-05-12 10:43:39,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.593167701863354 [2024-05-12 10:43:39,773 INFO L175 Difference]: Start difference. First operand has 378 places, 480 transitions, 8981 flow. Second operand 7 states and 191 transitions. [2024-05-12 10:43:39,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 505 transitions, 10399 flow [2024-05-12 10:43:42,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 505 transitions, 9999 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-05-12 10:43:42,837 INFO L231 Difference]: Finished difference. Result has 378 places, 480 transitions, 8942 flow [2024-05-12 10:43:42,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8581, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8942, PETRI_PLACES=378, PETRI_TRANSITIONS=480} [2024-05-12 10:43:42,838 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 328 predicate places. [2024-05-12 10:43:42,838 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 480 transitions, 8942 flow [2024-05-12 10:43:42,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:42,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:42,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:42,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-05-12 10:43:42,839 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:42,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:42,839 INFO L85 PathProgramCache]: Analyzing trace with hash -2090045224, now seen corresponding path program 2 times [2024-05-12 10:43:42,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:42,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950953577] [2024-05-12 10:43:42,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:42,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:43,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:43,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950953577] [2024-05-12 10:43:43,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950953577] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:43,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:43,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:43:43,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224486450] [2024-05-12 10:43:43,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:43,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:43:43,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:43,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:43:43,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:43:43,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:43:43,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 480 transitions, 8942 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:43,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:43,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:43:43,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:44,855 INFO L124 PetriNetUnfolderBase]: 5133/8567 cut-off events. [2024-05-12 10:43:44,855 INFO L125 PetriNetUnfolderBase]: For 481041/481108 co-relation queries the response was YES. [2024-05-12 10:43:44,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54102 conditions, 8567 events. 5133/8567 cut-off events. For 481041/481108 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 62302 event pairs, 1720 based on Foata normal form. 22/8149 useless extension candidates. Maximal degree in co-relation 53945. Up to 7416 conditions per place. [2024-05-12 10:43:44,974 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 408 selfloop transitions, 84 changer transitions 0/505 dead transitions. [2024-05-12 10:43:44,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 505 transitions, 10059 flow [2024-05-12 10:43:44,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:43:44,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:43:44,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-05-12 10:43:44,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577639751552795 [2024-05-12 10:43:44,976 INFO L175 Difference]: Start difference. First operand has 378 places, 480 transitions, 8942 flow. Second operand 7 states and 186 transitions. [2024-05-12 10:43:44,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 505 transitions, 10059 flow [2024-05-12 10:43:47,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 505 transitions, 9721 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 10:43:47,523 INFO L231 Difference]: Finished difference. Result has 380 places, 482 transitions, 8835 flow [2024-05-12 10:43:47,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8604, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8835, PETRI_PLACES=380, PETRI_TRANSITIONS=482} [2024-05-12 10:43:47,524 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 330 predicate places. [2024-05-12 10:43:47,524 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 482 transitions, 8835 flow [2024-05-12 10:43:47,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:47,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:47,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:47,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-05-12 10:43:47,525 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:47,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:47,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2081474344, now seen corresponding path program 3 times [2024-05-12 10:43:47,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:47,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010421999] [2024-05-12 10:43:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:47,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:47,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:47,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010421999] [2024-05-12 10:43:47,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010421999] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:47,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:47,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:43:47,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137808861] [2024-05-12 10:43:47,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:47,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:43:47,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:47,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:43:47,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:43:47,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:43:47,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 482 transitions, 8835 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:47,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:47,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:43:47,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:49,372 INFO L124 PetriNetUnfolderBase]: 5136/8582 cut-off events. [2024-05-12 10:43:49,372 INFO L125 PetriNetUnfolderBase]: For 455113/455173 co-relation queries the response was YES. [2024-05-12 10:43:49,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53487 conditions, 8582 events. 5136/8582 cut-off events. For 455113/455173 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 62485 event pairs, 1622 based on Foata normal form. 22/8167 useless extension candidates. Maximal degree in co-relation 53329. Up to 6594 conditions per place. [2024-05-12 10:43:49,492 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 411 selfloop transitions, 90 changer transitions 0/514 dead transitions. [2024-05-12 10:43:49,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 514 transitions, 10204 flow [2024-05-12 10:43:49,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:43:49,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:43:49,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-05-12 10:43:49,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5962732919254659 [2024-05-12 10:43:49,493 INFO L175 Difference]: Start difference. First operand has 380 places, 482 transitions, 8835 flow. Second operand 7 states and 192 transitions. [2024-05-12 10:43:49,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 514 transitions, 10204 flow [2024-05-12 10:43:52,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 514 transitions, 10006 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-05-12 10:43:52,388 INFO L231 Difference]: Finished difference. Result has 382 places, 484 transitions, 8884 flow [2024-05-12 10:43:52,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8637, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8884, PETRI_PLACES=382, PETRI_TRANSITIONS=484} [2024-05-12 10:43:52,388 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 332 predicate places. [2024-05-12 10:43:52,388 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 484 transitions, 8884 flow [2024-05-12 10:43:52,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:52,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:52,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:52,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-05-12 10:43:52,389 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:52,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:52,389 INFO L85 PathProgramCache]: Analyzing trace with hash 546845758, now seen corresponding path program 4 times [2024-05-12 10:43:52,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:52,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791434102] [2024-05-12 10:43:52,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:52,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:52,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:52,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791434102] [2024-05-12 10:43:52,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791434102] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:52,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:52,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:43:52,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488933251] [2024-05-12 10:43:52,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:52,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:43:52,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:52,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:43:52,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:43:52,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:43:52,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 484 transitions, 8884 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:52,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:52,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:43:52,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:54,443 INFO L124 PetriNetUnfolderBase]: 5183/8657 cut-off events. [2024-05-12 10:43:54,444 INFO L125 PetriNetUnfolderBase]: For 442954/443044 co-relation queries the response was YES. [2024-05-12 10:43:54,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54510 conditions, 8657 events. 5183/8657 cut-off events. For 442954/443044 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 63185 event pairs, 1709 based on Foata normal form. 27/8241 useless extension candidates. Maximal degree in co-relation 54351. Up to 7555 conditions per place. [2024-05-12 10:43:54,566 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 429 selfloop transitions, 87 changer transitions 0/529 dead transitions. [2024-05-12 10:43:54,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 529 transitions, 10451 flow [2024-05-12 10:43:54,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:43:54,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:43:54,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 275 transitions. [2024-05-12 10:43:54,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-05-12 10:43:54,567 INFO L175 Difference]: Start difference. First operand has 382 places, 484 transitions, 8884 flow. Second operand 11 states and 275 transitions. [2024-05-12 10:43:54,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 529 transitions, 10451 flow [2024-05-12 10:43:57,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 529 transitions, 10259 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-05-12 10:43:57,500 INFO L231 Difference]: Finished difference. Result has 392 places, 495 transitions, 9199 flow [2024-05-12 10:43:57,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8696, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9199, PETRI_PLACES=392, PETRI_TRANSITIONS=495} [2024-05-12 10:43:57,501 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 342 predicate places. [2024-05-12 10:43:57,501 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 495 transitions, 9199 flow [2024-05-12 10:43:57,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:57,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:43:57,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:43:57,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-05-12 10:43:57,502 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:43:57,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:43:57,502 INFO L85 PathProgramCache]: Analyzing trace with hash -99662914, now seen corresponding path program 5 times [2024-05-12 10:43:57,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:43:57,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766154246] [2024-05-12 10:43:57,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:43:57,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:43:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:43:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:43:57,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:43:57,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766154246] [2024-05-12 10:43:57,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766154246] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:43:57,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:43:57,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:43:57,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819670241] [2024-05-12 10:43:57,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:43:57,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:43:57,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:43:57,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:43:57,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:43:57,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:43:57,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 495 transitions, 9199 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:43:57,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:43:57,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:43:57,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:43:59,630 INFO L124 PetriNetUnfolderBase]: 5230/8735 cut-off events. [2024-05-12 10:43:59,630 INFO L125 PetriNetUnfolderBase]: For 461617/461704 co-relation queries the response was YES. [2024-05-12 10:43:59,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55253 conditions, 8735 events. 5230/8735 cut-off events. For 461617/461704 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 63800 event pairs, 1731 based on Foata normal form. 27/8323 useless extension candidates. Maximal degree in co-relation 55090. Up to 7504 conditions per place. [2024-05-12 10:43:59,757 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 357 selfloop transitions, 164 changer transitions 0/534 dead transitions. [2024-05-12 10:43:59,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 534 transitions, 10641 flow [2024-05-12 10:43:59,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:43:59,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:43:59,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 299 transitions. [2024-05-12 10:43:59,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-05-12 10:43:59,758 INFO L175 Difference]: Start difference. First operand has 392 places, 495 transitions, 9199 flow. Second operand 12 states and 299 transitions. [2024-05-12 10:43:59,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 534 transitions, 10641 flow [2024-05-12 10:44:02,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 534 transitions, 10512 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-05-12 10:44:02,789 INFO L231 Difference]: Finished difference. Result has 400 places, 499 transitions, 9523 flow [2024-05-12 10:44:02,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9070, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9523, PETRI_PLACES=400, PETRI_TRANSITIONS=499} [2024-05-12 10:44:02,789 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 350 predicate places. [2024-05-12 10:44:02,790 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 499 transitions, 9523 flow [2024-05-12 10:44:02,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:02,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:02,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:02,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-05-12 10:44:02,790 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:02,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:02,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1370631100, now seen corresponding path program 6 times [2024-05-12 10:44:02,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:02,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022042169] [2024-05-12 10:44:02,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:02,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:02,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:03,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:03,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022042169] [2024-05-12 10:44:03,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022042169] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:03,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:03,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:44:03,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88056891] [2024-05-12 10:44:03,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:03,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:44:03,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:03,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:44:03,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:44:03,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:44:03,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 499 transitions, 9523 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:03,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:03,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:44:03,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:04,910 INFO L124 PetriNetUnfolderBase]: 5251/8754 cut-off events. [2024-05-12 10:44:04,910 INFO L125 PetriNetUnfolderBase]: For 471224/471311 co-relation queries the response was YES. [2024-05-12 10:44:05,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55964 conditions, 8754 events. 5251/8754 cut-off events. For 471224/471311 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 63840 event pairs, 1759 based on Foata normal form. 27/8334 useless extension candidates. Maximal degree in co-relation 55799. Up to 7594 conditions per place. [2024-05-12 10:44:05,033 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 356 selfloop transitions, 160 changer transitions 0/529 dead transitions. [2024-05-12 10:44:05,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 529 transitions, 10687 flow [2024-05-12 10:44:05,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:44:05,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:44:05,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 292 transitions. [2024-05-12 10:44:05,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5289855072463768 [2024-05-12 10:44:05,034 INFO L175 Difference]: Start difference. First operand has 400 places, 499 transitions, 9523 flow. Second operand 12 states and 292 transitions. [2024-05-12 10:44:05,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 529 transitions, 10687 flow [2024-05-12 10:44:07,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 529 transitions, 10389 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-05-12 10:44:07,998 INFO L231 Difference]: Finished difference. Result has 405 places, 501 transitions, 9616 flow [2024-05-12 10:44:07,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9255, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9616, PETRI_PLACES=405, PETRI_TRANSITIONS=501} [2024-05-12 10:44:07,998 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 355 predicate places. [2024-05-12 10:44:07,999 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 501 transitions, 9616 flow [2024-05-12 10:44:07,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:07,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:07,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:07,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-05-12 10:44:07,999 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:08,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:08,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1014455228, now seen corresponding path program 7 times [2024-05-12 10:44:08,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:08,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213677668] [2024-05-12 10:44:08,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:08,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:08,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:08,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213677668] [2024-05-12 10:44:08,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213677668] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:08,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:08,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:44:08,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075518435] [2024-05-12 10:44:08,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:08,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:44:08,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:08,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:44:08,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:44:08,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:44:08,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 501 transitions, 9616 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:08,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:08,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:44:08,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:10,054 INFO L124 PetriNetUnfolderBase]: 5298/8994 cut-off events. [2024-05-12 10:44:10,054 INFO L125 PetriNetUnfolderBase]: For 488265/488352 co-relation queries the response was YES. [2024-05-12 10:44:10,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57026 conditions, 8994 events. 5298/8994 cut-off events. For 488265/488352 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 66608 event pairs, 1560 based on Foata normal form. 27/8586 useless extension candidates. Maximal degree in co-relation 56859. Up to 6820 conditions per place. [2024-05-12 10:44:10,189 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 353 selfloop transitions, 185 changer transitions 0/551 dead transitions. [2024-05-12 10:44:10,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 551 transitions, 11438 flow [2024-05-12 10:44:10,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:44:10,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:44:10,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 287 transitions. [2024-05-12 10:44:10,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.567193675889328 [2024-05-12 10:44:10,190 INFO L175 Difference]: Start difference. First operand has 405 places, 501 transitions, 9616 flow. Second operand 11 states and 287 transitions. [2024-05-12 10:44:10,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 551 transitions, 11438 flow [2024-05-12 10:44:13,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 551 transitions, 11133 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-05-12 10:44:13,834 INFO L231 Difference]: Finished difference. Result has 407 places, 510 transitions, 9969 flow [2024-05-12 10:44:13,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9311, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9969, PETRI_PLACES=407, PETRI_TRANSITIONS=510} [2024-05-12 10:44:13,835 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 357 predicate places. [2024-05-12 10:44:13,835 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 510 transitions, 9969 flow [2024-05-12 10:44:13,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:13,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:13,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:13,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-05-12 10:44:13,835 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:13,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:13,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1025883068, now seen corresponding path program 8 times [2024-05-12 10:44:13,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:13,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365666127] [2024-05-12 10:44:13,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:13,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:14,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:14,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365666127] [2024-05-12 10:44:14,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365666127] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:14,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:14,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:44:14,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066935018] [2024-05-12 10:44:14,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:14,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:44:14,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:14,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:44:14,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:44:14,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:44:14,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 510 transitions, 9969 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:14,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:14,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:44:14,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:15,886 INFO L124 PetriNetUnfolderBase]: 5319/9087 cut-off events. [2024-05-12 10:44:15,886 INFO L125 PetriNetUnfolderBase]: For 502932/503020 co-relation queries the response was YES. [2024-05-12 10:44:15,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58597 conditions, 9087 events. 5319/9087 cut-off events. For 502932/503020 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 67819 event pairs, 1490 based on Foata normal form. 27/8687 useless extension candidates. Maximal degree in co-relation 58428. Up to 6840 conditions per place. [2024-05-12 10:44:16,018 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 351 selfloop transitions, 189 changer transitions 0/553 dead transitions. [2024-05-12 10:44:16,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 553 transitions, 11476 flow [2024-05-12 10:44:16,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:44:16,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:44:16,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 286 transitions. [2024-05-12 10:44:16,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-05-12 10:44:16,020 INFO L175 Difference]: Start difference. First operand has 407 places, 510 transitions, 9969 flow. Second operand 11 states and 286 transitions. [2024-05-12 10:44:16,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 553 transitions, 11476 flow [2024-05-12 10:44:19,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 553 transitions, 11105 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-05-12 10:44:19,396 INFO L231 Difference]: Finished difference. Result has 412 places, 513 transitions, 10066 flow [2024-05-12 10:44:19,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9634, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10066, PETRI_PLACES=412, PETRI_TRANSITIONS=513} [2024-05-12 10:44:19,397 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 362 predicate places. [2024-05-12 10:44:19,397 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 513 transitions, 10066 flow [2024-05-12 10:44:19,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:19,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:19,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:19,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-05-12 10:44:19,397 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:19,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:19,397 INFO L85 PathProgramCache]: Analyzing trace with hash 571939774, now seen corresponding path program 9 times [2024-05-12 10:44:19,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:19,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941877261] [2024-05-12 10:44:19,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:19,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:19,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:19,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941877261] [2024-05-12 10:44:19,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941877261] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:19,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:19,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:44:19,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335889228] [2024-05-12 10:44:19,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:19,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:44:19,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:19,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:44:19,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:44:19,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:44:19,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 513 transitions, 10066 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:19,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:19,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:44:19,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:21,701 INFO L124 PetriNetUnfolderBase]: 5340/8890 cut-off events. [2024-05-12 10:44:21,701 INFO L125 PetriNetUnfolderBase]: For 501042/501130 co-relation queries the response was YES. [2024-05-12 10:44:21,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58514 conditions, 8890 events. 5340/8890 cut-off events. For 501042/501130 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 64986 event pairs, 1775 based on Foata normal form. 27/8465 useless extension candidates. Maximal degree in co-relation 58343. Up to 7725 conditions per place. [2024-05-12 10:44:21,821 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 374 selfloop transitions, 156 changer transitions 0/543 dead transitions. [2024-05-12 10:44:21,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 543 transitions, 11238 flow [2024-05-12 10:44:21,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:44:21,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:44:21,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 292 transitions. [2024-05-12 10:44:21,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5289855072463768 [2024-05-12 10:44:21,822 INFO L175 Difference]: Start difference. First operand has 412 places, 513 transitions, 10066 flow. Second operand 12 states and 292 transitions. [2024-05-12 10:44:21,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 543 transitions, 11238 flow [2024-05-12 10:44:25,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 543 transitions, 10824 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-05-12 10:44:25,325 INFO L231 Difference]: Finished difference. Result has 416 places, 515 transitions, 10015 flow [2024-05-12 10:44:25,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9654, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10015, PETRI_PLACES=416, PETRI_TRANSITIONS=515} [2024-05-12 10:44:25,326 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 366 predicate places. [2024-05-12 10:44:25,326 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 515 transitions, 10015 flow [2024-05-12 10:44:25,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:25,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:25,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:25,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-05-12 10:44:25,326 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:25,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:25,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1516249216, now seen corresponding path program 10 times [2024-05-12 10:44:25,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:25,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174938651] [2024-05-12 10:44:25,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:25,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:25,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:25,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174938651] [2024-05-12 10:44:25,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174938651] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:25,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:25,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:44:25,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703336961] [2024-05-12 10:44:25,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:25,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:44:25,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:25,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:44:25,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:44:25,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:44:25,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 515 transitions, 10015 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:25,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:25,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:44:25,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:27,424 INFO L124 PetriNetUnfolderBase]: 5330/8900 cut-off events. [2024-05-12 10:44:27,424 INFO L125 PetriNetUnfolderBase]: For 498091/498183 co-relation queries the response was YES. [2024-05-12 10:44:27,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57565 conditions, 8900 events. 5330/8900 cut-off events. For 498091/498183 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 65258 event pairs, 1768 based on Foata normal form. 24/8477 useless extension candidates. Maximal degree in co-relation 57393. Up to 7829 conditions per place. [2024-05-12 10:44:27,555 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 458 selfloop transitions, 71 changer transitions 0/542 dead transitions. [2024-05-12 10:44:27,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 542 transitions, 11159 flow [2024-05-12 10:44:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:44:27,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:44:27,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-05-12 10:44:27,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-05-12 10:44:27,556 INFO L175 Difference]: Start difference. First operand has 416 places, 515 transitions, 10015 flow. Second operand 7 states and 189 transitions. [2024-05-12 10:44:27,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 542 transitions, 11159 flow [2024-05-12 10:44:31,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 542 transitions, 10808 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-05-12 10:44:31,533 INFO L231 Difference]: Finished difference. Result has 414 places, 516 transitions, 9838 flow [2024-05-12 10:44:31,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9664, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9838, PETRI_PLACES=414, PETRI_TRANSITIONS=516} [2024-05-12 10:44:31,533 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 364 predicate places. [2024-05-12 10:44:31,533 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 516 transitions, 9838 flow [2024-05-12 10:44:31,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:31,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:31,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:31,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-05-12 10:44:31,534 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:31,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:31,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1361370067, now seen corresponding path program 11 times [2024-05-12 10:44:31,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:31,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172281154] [2024-05-12 10:44:31,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:31,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:31,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:31,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172281154] [2024-05-12 10:44:31,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172281154] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:31,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:31,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:44:31,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943223732] [2024-05-12 10:44:31,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:31,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:44:31,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:31,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:44:31,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:44:31,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:44:31,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 516 transitions, 9838 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:31,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:31,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:44:31,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:33,518 INFO L124 PetriNetUnfolderBase]: 5338/8902 cut-off events. [2024-05-12 10:44:33,519 INFO L125 PetriNetUnfolderBase]: For 488261/488474 co-relation queries the response was YES. [2024-05-12 10:44:33,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57345 conditions, 8902 events. 5338/8902 cut-off events. For 488261/488474 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 65086 event pairs, 1777 based on Foata normal form. 60/8507 useless extension candidates. Maximal degree in co-relation 57172. Up to 7415 conditions per place. [2024-05-12 10:44:33,653 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 267 selfloop transitions, 266 changer transitions 0/546 dead transitions. [2024-05-12 10:44:33,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 546 transitions, 11435 flow [2024-05-12 10:44:33,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:44:33,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:44:33,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 290 transitions. [2024-05-12 10:44:33,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5253623188405797 [2024-05-12 10:44:33,654 INFO L175 Difference]: Start difference. First operand has 414 places, 516 transitions, 9838 flow. Second operand 12 states and 290 transitions. [2024-05-12 10:44:33,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 546 transitions, 11435 flow [2024-05-12 10:44:37,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 546 transitions, 11310 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-05-12 10:44:37,335 INFO L231 Difference]: Finished difference. Result has 423 places, 519 transitions, 10306 flow [2024-05-12 10:44:37,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9713, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10306, PETRI_PLACES=423, PETRI_TRANSITIONS=519} [2024-05-12 10:44:37,336 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 373 predicate places. [2024-05-12 10:44:37,336 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 519 transitions, 10306 flow [2024-05-12 10:44:37,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:37,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:37,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:37,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-05-12 10:44:37,337 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:37,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:37,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1259998266, now seen corresponding path program 4 times [2024-05-12 10:44:37,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:37,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033754990] [2024-05-12 10:44:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:37,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:37,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:37,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:37,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033754990] [2024-05-12 10:44:37,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033754990] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:37,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:37,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:44:37,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298034237] [2024-05-12 10:44:37,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:37,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:44:37,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:37,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:44:37,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:44:37,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:44:37,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 519 transitions, 10306 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:37,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:37,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:44:37,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:39,653 INFO L124 PetriNetUnfolderBase]: 5326/8884 cut-off events. [2024-05-12 10:44:39,653 INFO L125 PetriNetUnfolderBase]: For 495984/496089 co-relation queries the response was YES. [2024-05-12 10:44:39,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57603 conditions, 8884 events. 5326/8884 cut-off events. For 495984/496089 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 65043 event pairs, 1746 based on Foata normal form. 29/8470 useless extension candidates. Maximal degree in co-relation 57429. Up to 7774 conditions per place. [2024-05-12 10:44:39,767 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 423 selfloop transitions, 103 changer transitions 0/539 dead transitions. [2024-05-12 10:44:39,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 539 transitions, 11410 flow [2024-05-12 10:44:39,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:44:39,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:44:39,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-05-12 10:44:39,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-05-12 10:44:39,768 INFO L175 Difference]: Start difference. First operand has 423 places, 519 transitions, 10306 flow. Second operand 7 states and 184 transitions. [2024-05-12 10:44:39,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 539 transitions, 11410 flow [2024-05-12 10:44:43,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 539 transitions, 10813 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-05-12 10:44:43,510 INFO L231 Difference]: Finished difference. Result has 422 places, 519 transitions, 9921 flow [2024-05-12 10:44:43,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9709, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9921, PETRI_PLACES=422, PETRI_TRANSITIONS=519} [2024-05-12 10:44:43,511 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 372 predicate places. [2024-05-12 10:44:43,511 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 519 transitions, 9921 flow [2024-05-12 10:44:43,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:43,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:43,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:43,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-05-12 10:44:43,511 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:43,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:43,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1973058997, now seen corresponding path program 12 times [2024-05-12 10:44:43,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:43,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544260082] [2024-05-12 10:44:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:43,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:43,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:43,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544260082] [2024-05-12 10:44:43,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544260082] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:43,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:43,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:44:43,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062054073] [2024-05-12 10:44:43,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:43,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:44:43,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:43,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:44:43,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:44:43,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:44:43,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 519 transitions, 9921 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:43,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:43,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:44:43,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:45,427 INFO L124 PetriNetUnfolderBase]: 5345/8908 cut-off events. [2024-05-12 10:44:45,427 INFO L125 PetriNetUnfolderBase]: For 499650/499862 co-relation queries the response was YES. [2024-05-12 10:44:45,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56719 conditions, 8908 events. 5345/8908 cut-off events. For 499650/499862 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 65117 event pairs, 1773 based on Foata normal form. 60/8509 useless extension candidates. Maximal degree in co-relation 56545. Up to 7416 conditions per place. [2024-05-12 10:44:45,557 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 277 selfloop transitions, 259 changer transitions 0/549 dead transitions. [2024-05-12 10:44:45,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 549 transitions, 11771 flow [2024-05-12 10:44:45,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:44:45,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:44:45,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 272 transitions. [2024-05-12 10:44:45,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375494071146245 [2024-05-12 10:44:45,558 INFO L175 Difference]: Start difference. First operand has 422 places, 519 transitions, 9921 flow. Second operand 11 states and 272 transitions. [2024-05-12 10:44:45,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 549 transitions, 11771 flow [2024-05-12 10:44:49,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 549 transitions, 11494 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-05-12 10:44:49,541 INFO L231 Difference]: Finished difference. Result has 425 places, 525 transitions, 10260 flow [2024-05-12 10:44:49,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9644, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10260, PETRI_PLACES=425, PETRI_TRANSITIONS=525} [2024-05-12 10:44:49,542 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 375 predicate places. [2024-05-12 10:44:49,542 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 525 transitions, 10260 flow [2024-05-12 10:44:49,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:49,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:49,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:44:49,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-05-12 10:44:49,542 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:49,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:49,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1096005436, now seen corresponding path program 11 times [2024-05-12 10:44:49,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:49,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270372147] [2024-05-12 10:44:49,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:49,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:49,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:49,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270372147] [2024-05-12 10:44:49,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270372147] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:49,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:49,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:44:49,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588468418] [2024-05-12 10:44:49,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:49,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:44:49,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:49,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:44:49,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:44:49,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:44:49,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 525 transitions, 10260 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:49,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:49,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:44:49,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:51,558 INFO L124 PetriNetUnfolderBase]: 5366/8930 cut-off events. [2024-05-12 10:44:51,558 INFO L125 PetriNetUnfolderBase]: For 514287/514374 co-relation queries the response was YES. [2024-05-12 10:44:51,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57359 conditions, 8930 events. 5366/8930 cut-off events. For 514287/514374 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 65167 event pairs, 1771 based on Foata normal form. 27/8496 useless extension candidates. Maximal degree in co-relation 57184. Up to 7873 conditions per place. [2024-05-12 10:44:51,692 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 454 selfloop transitions, 83 changer transitions 0/550 dead transitions. [2024-05-12 10:44:51,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 550 transitions, 11436 flow [2024-05-12 10:44:51,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:44:51,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:44:51,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-05-12 10:44:51,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369565217391304 [2024-05-12 10:44:51,693 INFO L175 Difference]: Start difference. First operand has 425 places, 525 transitions, 10260 flow. Second operand 10 states and 247 transitions. [2024-05-12 10:44:51,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 550 transitions, 11436 flow [2024-05-12 10:44:55,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 550 transitions, 10948 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-05-12 10:44:55,863 INFO L231 Difference]: Finished difference. Result has 428 places, 527 transitions, 9991 flow [2024-05-12 10:44:55,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9772, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9991, PETRI_PLACES=428, PETRI_TRANSITIONS=527} [2024-05-12 10:44:55,864 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 378 predicate places. [2024-05-12 10:44:55,864 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 527 transitions, 9991 flow [2024-05-12 10:44:55,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:55,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:44:55,864 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, 1] [2024-05-12 10:44:55,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-05-12 10:44:55,864 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:44:55,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:44:55,865 INFO L85 PathProgramCache]: Analyzing trace with hash -531877538, now seen corresponding path program 12 times [2024-05-12 10:44:55,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:44:55,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716200309] [2024-05-12 10:44:55,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:44:55,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:44:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:44:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:44:56,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:44:56,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716200309] [2024-05-12 10:44:56,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716200309] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:44:56,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:44:56,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:44:56,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142520778] [2024-05-12 10:44:56,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:44:56,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:44:56,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:44:56,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:44:56,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:44:56,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:44:56,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 527 transitions, 9991 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:44:56,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:44:56,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:44:56,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:44:58,168 INFO L124 PetriNetUnfolderBase]: 5387/8974 cut-off events. [2024-05-12 10:44:58,168 INFO L125 PetriNetUnfolderBase]: For 520326/520415 co-relation queries the response was YES. [2024-05-12 10:44:58,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57084 conditions, 8974 events. 5387/8974 cut-off events. For 520326/520415 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 65625 event pairs, 1744 based on Foata normal form. 27/8536 useless extension candidates. Maximal degree in co-relation 56908. Up to 7630 conditions per place. [2024-05-12 10:44:58,281 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 381 selfloop transitions, 166 changer transitions 0/560 dead transitions. [2024-05-12 10:44:58,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 560 transitions, 11235 flow [2024-05-12 10:44:58,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:44:58,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:44:58,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 277 transitions. [2024-05-12 10:44:58,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474308300395256 [2024-05-12 10:44:58,282 INFO L175 Difference]: Start difference. First operand has 428 places, 527 transitions, 9991 flow. Second operand 11 states and 277 transitions. [2024-05-12 10:44:58,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 560 transitions, 11235 flow [2024-05-12 10:45:02,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 560 transitions, 11078 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-05-12 10:45:02,855 INFO L231 Difference]: Finished difference. Result has 434 places, 530 transitions, 10247 flow [2024-05-12 10:45:02,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9834, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10247, PETRI_PLACES=434, PETRI_TRANSITIONS=530} [2024-05-12 10:45:02,856 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 384 predicate places. [2024-05-12 10:45:02,856 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 530 transitions, 10247 flow [2024-05-12 10:45:02,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:02,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:02,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:45:02,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-05-12 10:45:02,856 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:02,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:02,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1370635657, now seen corresponding path program 13 times [2024-05-12 10:45:02,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:02,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788017060] [2024-05-12 10:45:02,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:02,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:03,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:03,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788017060] [2024-05-12 10:45:03,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788017060] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:03,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:03,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:45:03,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386218258] [2024-05-12 10:45:03,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:03,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:45:03,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:03,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:45:03,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:45:03,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:45:03,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 530 transitions, 10247 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:03,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:03,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:45:03,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:04,903 INFO L124 PetriNetUnfolderBase]: 5384/8976 cut-off events. [2024-05-12 10:45:04,904 INFO L125 PetriNetUnfolderBase]: For 519265/519488 co-relation queries the response was YES. [2024-05-12 10:45:05,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57463 conditions, 8976 events. 5384/8976 cut-off events. For 519265/519488 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 65687 event pairs, 1757 based on Foata normal form. 60/8569 useless extension candidates. Maximal degree in co-relation 57285. Up to 7475 conditions per place. [2024-05-12 10:45:05,045 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 280 selfloop transitions, 260 changer transitions 0/553 dead transitions. [2024-05-12 10:45:05,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 553 transitions, 11813 flow [2024-05-12 10:45:05,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:45:05,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:45:05,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 270 transitions. [2024-05-12 10:45:05,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335968379446641 [2024-05-12 10:45:05,046 INFO L175 Difference]: Start difference. First operand has 434 places, 530 transitions, 10247 flow. Second operand 11 states and 270 transitions. [2024-05-12 10:45:05,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 553 transitions, 11813 flow [2024-05-12 10:45:09,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 553 transitions, 11462 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-05-12 10:45:09,487 INFO L231 Difference]: Finished difference. Result has 437 places, 530 transitions, 10422 flow [2024-05-12 10:45:09,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9896, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10422, PETRI_PLACES=437, PETRI_TRANSITIONS=530} [2024-05-12 10:45:09,488 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 387 predicate places. [2024-05-12 10:45:09,488 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 530 transitions, 10422 flow [2024-05-12 10:45:09,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:09,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:09,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:45:09,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-05-12 10:45:09,488 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:09,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:09,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1095998833, now seen corresponding path program 14 times [2024-05-12 10:45:09,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:09,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100580929] [2024-05-12 10:45:09,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:09,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:09,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:09,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:09,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100580929] [2024-05-12 10:45:09,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100580929] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:09,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:09,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:45:09,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99149436] [2024-05-12 10:45:09,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:09,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:45:09,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:09,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:45:09,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:45:09,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:45:09,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 530 transitions, 10422 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:09,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:09,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:45:09,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:11,442 INFO L124 PetriNetUnfolderBase]: 5403/8999 cut-off events. [2024-05-12 10:45:11,442 INFO L125 PetriNetUnfolderBase]: For 534694/534909 co-relation queries the response was YES. [2024-05-12 10:45:11,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57938 conditions, 8999 events. 5403/8999 cut-off events. For 534694/534909 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 65793 event pairs, 1784 based on Foata normal form. 60/8590 useless extension candidates. Maximal degree in co-relation 57759. Up to 7496 conditions per place. [2024-05-12 10:45:11,580 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 284 selfloop transitions, 258 changer transitions 0/555 dead transitions. [2024-05-12 10:45:11,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 555 transitions, 12096 flow [2024-05-12 10:45:11,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:45:11,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:45:11,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-05-12 10:45:11,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369565217391304 [2024-05-12 10:45:11,581 INFO L175 Difference]: Start difference. First operand has 437 places, 530 transitions, 10422 flow. Second operand 10 states and 247 transitions. [2024-05-12 10:45:11,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 555 transitions, 12096 flow [2024-05-12 10:45:15,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 555 transitions, 11556 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-05-12 10:45:15,451 INFO L231 Difference]: Finished difference. Result has 437 places, 536 transitions, 10514 flow [2024-05-12 10:45:15,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=9894, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10514, PETRI_PLACES=437, PETRI_TRANSITIONS=536} [2024-05-12 10:45:15,452 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 387 predicate places. [2024-05-12 10:45:15,452 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 536 transitions, 10514 flow [2024-05-12 10:45:15,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:15,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:15,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:45:15,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-05-12 10:45:15,452 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:15,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:15,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1108897003, now seen corresponding path program 15 times [2024-05-12 10:45:15,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:15,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709438939] [2024-05-12 10:45:15,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:15,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:15,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:15,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709438939] [2024-05-12 10:45:15,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709438939] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:15,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:15,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:45:15,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439383963] [2024-05-12 10:45:15,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:15,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:45:15,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:15,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:45:15,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:45:15,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:45:15,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 536 transitions, 10514 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:15,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:15,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:45:15,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:17,733 INFO L124 PetriNetUnfolderBase]: 5411/9005 cut-off events. [2024-05-12 10:45:17,733 INFO L125 PetriNetUnfolderBase]: For 539910/539967 co-relation queries the response was YES. [2024-05-12 10:45:17,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58057 conditions, 9005 events. 5411/9005 cut-off events. For 539910/539967 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 65897 event pairs, 1761 based on Foata normal form. 6/8532 useless extension candidates. Maximal degree in co-relation 57877. Up to 8084 conditions per place. [2024-05-12 10:45:17,852 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 487 selfloop transitions, 56 changer transitions 0/556 dead transitions. [2024-05-12 10:45:17,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 556 transitions, 11695 flow [2024-05-12 10:45:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:45:17,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:45:17,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-05-12 10:45:17,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043478260869565 [2024-05-12 10:45:17,853 INFO L175 Difference]: Start difference. First operand has 437 places, 536 transitions, 10514 flow. Second operand 10 states and 232 transitions. [2024-05-12 10:45:17,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 556 transitions, 11695 flow [2024-05-12 10:45:21,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 556 transitions, 11294 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-05-12 10:45:21,671 INFO L231 Difference]: Finished difference. Result has 441 places, 539 transitions, 10292 flow [2024-05-12 10:45:21,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10122, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10292, PETRI_PLACES=441, PETRI_TRANSITIONS=539} [2024-05-12 10:45:21,672 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 391 predicate places. [2024-05-12 10:45:21,672 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 539 transitions, 10292 flow [2024-05-12 10:45:21,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:21,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:21,673 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] [2024-05-12 10:45:21,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-05-12 10:45:21,673 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:21,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:21,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1096009993, now seen corresponding path program 16 times [2024-05-12 10:45:21,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:21,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321656529] [2024-05-12 10:45:21,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:21,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:21,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:21,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321656529] [2024-05-12 10:45:21,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321656529] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:21,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:21,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:45:21,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347903841] [2024-05-12 10:45:21,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:21,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:45:21,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:21,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:45:21,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:45:22,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:45:22,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 539 transitions, 10292 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:22,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:22,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:45:22,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:23,750 INFO L124 PetriNetUnfolderBase]: 5408/9012 cut-off events. [2024-05-12 10:45:23,750 INFO L125 PetriNetUnfolderBase]: For 543686/543902 co-relation queries the response was YES. [2024-05-12 10:45:23,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57288 conditions, 9012 events. 5408/9012 cut-off events. For 543686/543902 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 65992 event pairs, 1757 based on Foata normal form. 60/8596 useless extension candidates. Maximal degree in co-relation 57107. Up to 7502 conditions per place. [2024-05-12 10:45:23,893 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 284 selfloop transitions, 260 changer transitions 0/557 dead transitions. [2024-05-12 10:45:23,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 557 transitions, 11644 flow [2024-05-12 10:45:23,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:45:23,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:45:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-05-12 10:45:23,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369565217391304 [2024-05-12 10:45:23,894 INFO L175 Difference]: Start difference. First operand has 441 places, 539 transitions, 10292 flow. Second operand 10 states and 247 transitions. [2024-05-12 10:45:23,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 557 transitions, 11644 flow [2024-05-12 10:45:28,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 557 transitions, 11520 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-05-12 10:45:28,266 INFO L231 Difference]: Finished difference. Result has 443 places, 539 transitions, 10694 flow [2024-05-12 10:45:28,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10168, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10694, PETRI_PLACES=443, PETRI_TRANSITIONS=539} [2024-05-12 10:45:28,266 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 393 predicate places. [2024-05-12 10:45:28,266 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 539 transitions, 10694 flow [2024-05-12 10:45:28,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:28,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:28,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:45:28,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-05-12 10:45:28,267 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:28,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:28,267 INFO L85 PathProgramCache]: Analyzing trace with hash 221670110, now seen corresponding path program 13 times [2024-05-12 10:45:28,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:28,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716603501] [2024-05-12 10:45:28,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:28,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:28,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:28,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716603501] [2024-05-12 10:45:28,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716603501] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:28,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:28,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:45:28,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587967871] [2024-05-12 10:45:28,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:28,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:45:28,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:28,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:45:28,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:45:28,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:45:28,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 539 transitions, 10694 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:28,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:28,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:45:28,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:30,391 INFO L124 PetriNetUnfolderBase]: 5403/9024 cut-off events. [2024-05-12 10:45:30,391 INFO L125 PetriNetUnfolderBase]: For 550787/550882 co-relation queries the response was YES. [2024-05-12 10:45:30,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57862 conditions, 9024 events. 5403/9024 cut-off events. For 550787/550882 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 66194 event pairs, 1730 based on Foata normal form. 22/8578 useless extension candidates. Maximal degree in co-relation 57680. Up to 7872 conditions per place. [2024-05-12 10:45:30,527 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 452 selfloop transitions, 100 changer transitions 0/565 dead transitions. [2024-05-12 10:45:30,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 565 transitions, 11866 flow [2024-05-12 10:45:30,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:45:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:45:30,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-05-12 10:45:30,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.593167701863354 [2024-05-12 10:45:30,528 INFO L175 Difference]: Start difference. First operand has 443 places, 539 transitions, 10694 flow. Second operand 7 states and 191 transitions. [2024-05-12 10:45:30,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 565 transitions, 11866 flow [2024-05-12 10:45:35,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 565 transitions, 11300 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-05-12 10:45:35,427 INFO L231 Difference]: Finished difference. Result has 441 places, 539 transitions, 10337 flow [2024-05-12 10:45:35,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10128, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10337, PETRI_PLACES=441, PETRI_TRANSITIONS=539} [2024-05-12 10:45:35,427 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 391 predicate places. [2024-05-12 10:45:35,427 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 539 transitions, 10337 flow [2024-05-12 10:45:35,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:35,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:35,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:45:35,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-05-12 10:45:35,428 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:35,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:35,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1397880994, now seen corresponding path program 14 times [2024-05-12 10:45:35,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:35,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553198752] [2024-05-12 10:45:35,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:35,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:35,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:35,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553198752] [2024-05-12 10:45:35,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553198752] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:35,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:35,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:45:35,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106859411] [2024-05-12 10:45:35,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:35,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:45:35,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:35,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:45:35,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:45:35,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:45:35,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 539 transitions, 10337 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:35,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:35,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:45:35,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:37,719 INFO L124 PetriNetUnfolderBase]: 5398/9175 cut-off events. [2024-05-12 10:45:37,719 INFO L125 PetriNetUnfolderBase]: For 541840/541934 co-relation queries the response was YES. [2024-05-12 10:45:37,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57164 conditions, 9175 events. 5398/9175 cut-off events. For 541840/541934 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 68384 event pairs, 1471 based on Foata normal form. 22/8744 useless extension candidates. Maximal degree in co-relation 56981. Up to 7430 conditions per place. [2024-05-12 10:45:37,849 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 443 selfloop transitions, 115 changer transitions 0/571 dead transitions. [2024-05-12 10:45:37,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 571 transitions, 11557 flow [2024-05-12 10:45:37,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:45:37,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:45:37,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-05-12 10:45:37,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6118012422360248 [2024-05-12 10:45:37,850 INFO L175 Difference]: Start difference. First operand has 441 places, 539 transitions, 10337 flow. Second operand 7 states and 197 transitions. [2024-05-12 10:45:37,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 571 transitions, 11557 flow [2024-05-12 10:45:42,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 571 transitions, 11321 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-05-12 10:45:42,558 INFO L231 Difference]: Finished difference. Result has 442 places, 539 transitions, 10339 flow [2024-05-12 10:45:42,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10101, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10339, PETRI_PLACES=442, PETRI_TRANSITIONS=539} [2024-05-12 10:45:42,558 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 392 predicate places. [2024-05-12 10:45:42,558 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 539 transitions, 10339 flow [2024-05-12 10:45:42,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:42,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:42,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:45:42,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-05-12 10:45:42,559 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:42,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:42,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1220861446, now seen corresponding path program 5 times [2024-05-12 10:45:42,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:42,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68651104] [2024-05-12 10:45:42,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:42,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:42,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:42,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68651104] [2024-05-12 10:45:42,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68651104] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:42,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:42,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:45:42,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696502966] [2024-05-12 10:45:42,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:42,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:45:42,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:42,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:45:42,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:45:42,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:45:42,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 539 transitions, 10339 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:42,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:42,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:45:42,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:44,613 INFO L124 PetriNetUnfolderBase]: 5419/9039 cut-off events. [2024-05-12 10:45:44,613 INFO L125 PetriNetUnfolderBase]: For 547532/547586 co-relation queries the response was YES. [2024-05-12 10:45:44,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57533 conditions, 9039 events. 5419/9039 cut-off events. For 547532/547586 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 66178 event pairs, 1718 based on Foata normal form. 2/8560 useless extension candidates. Maximal degree in co-relation 57349. Up to 8116 conditions per place. [2024-05-12 10:45:44,750 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 512 selfloop transitions, 33 changer transitions 0/558 dead transitions. [2024-05-12 10:45:44,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 558 transitions, 11524 flow [2024-05-12 10:45:44,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:45:44,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:45:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-05-12 10:45:44,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403726708074534 [2024-05-12 10:45:44,751 INFO L175 Difference]: Start difference. First operand has 442 places, 539 transitions, 10339 flow. Second operand 7 states and 174 transitions. [2024-05-12 10:45:44,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 558 transitions, 11524 flow [2024-05-12 10:45:49,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 558 transitions, 11247 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-05-12 10:45:49,813 INFO L231 Difference]: Finished difference. Result has 442 places, 541 transitions, 10189 flow [2024-05-12 10:45:49,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10062, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10189, PETRI_PLACES=442, PETRI_TRANSITIONS=541} [2024-05-12 10:45:49,814 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 392 predicate places. [2024-05-12 10:45:49,814 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 541 transitions, 10189 flow [2024-05-12 10:45:49,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:49,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:49,814 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] [2024-05-12 10:45:49,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-05-12 10:45:49,814 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:49,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:49,815 INFO L85 PathProgramCache]: Analyzing trace with hash -2049404488, now seen corresponding path program 6 times [2024-05-12 10:45:49,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:49,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458809019] [2024-05-12 10:45:49,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:49,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:50,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:50,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458809019] [2024-05-12 10:45:50,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458809019] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:50,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:50,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:45:50,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137529834] [2024-05-12 10:45:50,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:50,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:45:50,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:50,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:45:50,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:45:50,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:45:50,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 541 transitions, 10189 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:50,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:50,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:45:50,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:52,037 INFO L124 PetriNetUnfolderBase]: 5440/9112 cut-off events. [2024-05-12 10:45:52,037 INFO L125 PetriNetUnfolderBase]: For 554259/554313 co-relation queries the response was YES. [2024-05-12 10:45:52,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57246 conditions, 9112 events. 5440/9112 cut-off events. For 554259/554313 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 66887 event pairs, 1704 based on Foata normal form. 2/8636 useless extension candidates. Maximal degree in co-relation 57062. Up to 8109 conditions per place. [2024-05-12 10:45:52,173 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 514 selfloop transitions, 37 changer transitions 0/564 dead transitions. [2024-05-12 10:45:52,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 564 transitions, 11392 flow [2024-05-12 10:45:52,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:45:52,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:45:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-05-12 10:45:52,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5353260869565217 [2024-05-12 10:45:52,174 INFO L175 Difference]: Start difference. First operand has 442 places, 541 transitions, 10189 flow. Second operand 8 states and 197 transitions. [2024-05-12 10:45:52,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 564 transitions, 11392 flow [2024-05-12 10:45:57,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 564 transitions, 11298 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-05-12 10:45:57,199 INFO L231 Difference]: Finished difference. Result has 446 places, 543 transitions, 10223 flow [2024-05-12 10:45:57,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10095, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10223, PETRI_PLACES=446, PETRI_TRANSITIONS=543} [2024-05-12 10:45:57,199 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 396 predicate places. [2024-05-12 10:45:57,199 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 543 transitions, 10223 flow [2024-05-12 10:45:57,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:57,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:45:57,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:45:57,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-05-12 10:45:57,200 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:45:57,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:45:57,200 INFO L85 PathProgramCache]: Analyzing trace with hash -2056344799, now seen corresponding path program 17 times [2024-05-12 10:45:57,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:45:57,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464777784] [2024-05-12 10:45:57,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:45:57,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:45:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:45:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:45:57,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:45:57,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464777784] [2024-05-12 10:45:57,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464777784] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:45:57,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:45:57,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:45:57,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831170873] [2024-05-12 10:45:57,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:45:57,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:45:57,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:45:57,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:45:57,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:45:57,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:45:57,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 543 transitions, 10223 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:45:57,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:45:57,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:45:57,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:45:59,913 INFO L124 PetriNetUnfolderBase]: 5437/9054 cut-off events. [2024-05-12 10:45:59,913 INFO L125 PetriNetUnfolderBase]: For 548637/548707 co-relation queries the response was YES. [2024-05-12 10:46:00,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57057 conditions, 9054 events. 5437/9054 cut-off events. For 548637/548707 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 66252 event pairs, 1743 based on Foata normal form. 13/8582 useless extension candidates. Maximal degree in co-relation 56872. Up to 7854 conditions per place. [2024-05-12 10:46:00,037 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 416 selfloop transitions, 147 changer transitions 0/576 dead transitions. [2024-05-12 10:46:00,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 576 transitions, 11705 flow [2024-05-12 10:46:00,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:46:00,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:46:00,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-05-12 10:46:00,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-05-12 10:46:00,038 INFO L175 Difference]: Start difference. First operand has 446 places, 543 transitions, 10223 flow. Second operand 8 states and 220 transitions. [2024-05-12 10:46:00,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 576 transitions, 11705 flow [2024-05-12 10:46:04,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 576 transitions, 11592 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-05-12 10:46:04,396 INFO L231 Difference]: Finished difference. Result has 448 places, 544 transitions, 10497 flow [2024-05-12 10:46:04,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10110, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10497, PETRI_PLACES=448, PETRI_TRANSITIONS=544} [2024-05-12 10:46:04,396 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 398 predicate places. [2024-05-12 10:46:04,396 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 544 transitions, 10497 flow [2024-05-12 10:46:04,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:04,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:04,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:04,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-05-12 10:46:04,397 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:04,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:04,397 INFO L85 PathProgramCache]: Analyzing trace with hash -2042120183, now seen corresponding path program 18 times [2024-05-12 10:46:04,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:04,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165714910] [2024-05-12 10:46:04,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:04,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:04,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:04,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165714910] [2024-05-12 10:46:04,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165714910] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:04,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:04,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:46:04,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610383489] [2024-05-12 10:46:04,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:04,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:46:04,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:04,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:46:04,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:46:04,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:46:04,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 544 transitions, 10497 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:04,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:04,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:46:04,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:07,127 INFO L124 PetriNetUnfolderBase]: 5445/9075 cut-off events. [2024-05-12 10:46:07,127 INFO L125 PetriNetUnfolderBase]: For 562158/562348 co-relation queries the response was YES. [2024-05-12 10:46:07,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57567 conditions, 9075 events. 5445/9075 cut-off events. For 562158/562348 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 66560 event pairs, 1843 based on Foata normal form. 34/8635 useless extension candidates. Maximal degree in co-relation 57380. Up to 7647 conditions per place. [2024-05-12 10:46:07,268 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 348 selfloop transitions, 205 changer transitions 0/566 dead transitions. [2024-05-12 10:46:07,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 566 transitions, 12169 flow [2024-05-12 10:46:07,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:46:07,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:46:07,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-05-12 10:46:07,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577639751552795 [2024-05-12 10:46:07,269 INFO L175 Difference]: Start difference. First operand has 448 places, 544 transitions, 10497 flow. Second operand 7 states and 186 transitions. [2024-05-12 10:46:07,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 566 transitions, 12169 flow [2024-05-12 10:46:12,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 566 transitions, 11895 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-05-12 10:46:12,506 INFO L231 Difference]: Finished difference. Result has 449 places, 547 transitions, 10696 flow [2024-05-12 10:46:12,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10227, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10696, PETRI_PLACES=449, PETRI_TRANSITIONS=547} [2024-05-12 10:46:12,506 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 399 predicate places. [2024-05-12 10:46:12,506 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 547 transitions, 10696 flow [2024-05-12 10:46:12,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:12,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:12,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:12,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-05-12 10:46:12,507 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:12,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:12,507 INFO L85 PathProgramCache]: Analyzing trace with hash -2042131343, now seen corresponding path program 19 times [2024-05-12 10:46:12,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:12,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007420318] [2024-05-12 10:46:12,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:12,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:12,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:12,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007420318] [2024-05-12 10:46:12,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007420318] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:12,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:12,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:46:12,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726825247] [2024-05-12 10:46:12,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:12,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:46:12,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:12,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:46:12,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:46:12,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:46:12,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 547 transitions, 10696 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:12,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:12,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:46:12,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:15,074 INFO L124 PetriNetUnfolderBase]: 5442/9076 cut-off events. [2024-05-12 10:46:15,074 INFO L125 PetriNetUnfolderBase]: For 558216/558405 co-relation queries the response was YES. [2024-05-12 10:46:15,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57686 conditions, 9076 events. 5442/9076 cut-off events. For 558216/558405 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 66568 event pairs, 1836 based on Foata normal form. 34/8636 useless extension candidates. Maximal degree in co-relation 57499. Up to 7644 conditions per place. [2024-05-12 10:46:15,210 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 344 selfloop transitions, 211 changer transitions 0/568 dead transitions. [2024-05-12 10:46:15,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 568 transitions, 12092 flow [2024-05-12 10:46:15,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:46:15,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:46:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-05-12 10:46:15,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5838509316770186 [2024-05-12 10:46:15,211 INFO L175 Difference]: Start difference. First operand has 449 places, 547 transitions, 10696 flow. Second operand 7 states and 188 transitions. [2024-05-12 10:46:15,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 568 transitions, 12092 flow [2024-05-12 10:46:21,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 568 transitions, 11667 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-05-12 10:46:21,152 INFO L231 Difference]: Finished difference. Result has 452 places, 547 transitions, 10699 flow [2024-05-12 10:46:21,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10271, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10699, PETRI_PLACES=452, PETRI_TRANSITIONS=547} [2024-05-12 10:46:21,153 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 402 predicate places. [2024-05-12 10:46:21,153 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 547 transitions, 10699 flow [2024-05-12 10:46:21,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:21,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:21,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:21,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-05-12 10:46:21,154 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:21,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:21,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1870351043, now seen corresponding path program 20 times [2024-05-12 10:46:21,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:21,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291298518] [2024-05-12 10:46:21,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:21,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:21,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:21,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291298518] [2024-05-12 10:46:21,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291298518] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:21,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:21,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:46:21,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804429309] [2024-05-12 10:46:21,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:21,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:46:21,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:21,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:46:21,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:46:21,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:46:21,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 547 transitions, 10699 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:21,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:21,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:46:21,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:23,851 INFO L124 PetriNetUnfolderBase]: 5439/9053 cut-off events. [2024-05-12 10:46:23,851 INFO L125 PetriNetUnfolderBase]: For 554096/554162 co-relation queries the response was YES. [2024-05-12 10:46:23,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57570 conditions, 9053 events. 5439/9053 cut-off events. For 554096/554162 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 66200 event pairs, 1770 based on Foata normal form. 13/8582 useless extension candidates. Maximal degree in co-relation 57382. Up to 7857 conditions per place. [2024-05-12 10:46:23,980 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 414 selfloop transitions, 148 changer transitions 0/575 dead transitions. [2024-05-12 10:46:23,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 575 transitions, 12143 flow [2024-05-12 10:46:23,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:46:23,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:46:23,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-05-12 10:46:23,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-05-12 10:46:23,981 INFO L175 Difference]: Start difference. First operand has 452 places, 547 transitions, 10699 flow. Second operand 7 states and 196 transitions. [2024-05-12 10:46:23,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 575 transitions, 12143 flow [2024-05-12 10:46:28,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 575 transitions, 11707 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-05-12 10:46:28,923 INFO L231 Difference]: Finished difference. Result has 453 places, 547 transitions, 10579 flow [2024-05-12 10:46:28,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10263, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10579, PETRI_PLACES=453, PETRI_TRANSITIONS=547} [2024-05-12 10:46:28,924 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 403 predicate places. [2024-05-12 10:46:28,924 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 547 transitions, 10579 flow [2024-05-12 10:46:28,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:28,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:28,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:28,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-05-12 10:46:28,924 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:28,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:28,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1870356623, now seen corresponding path program 21 times [2024-05-12 10:46:28,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:28,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958914178] [2024-05-12 10:46:28,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:28,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:29,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:29,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958914178] [2024-05-12 10:46:29,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958914178] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:29,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:29,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:46:29,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034367726] [2024-05-12 10:46:29,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:29,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:46:29,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:29,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:46:29,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:46:29,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:46:29,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 547 transitions, 10579 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:29,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:29,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:46:29,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:31,561 INFO L124 PetriNetUnfolderBase]: 5436/9049 cut-off events. [2024-05-12 10:46:31,561 INFO L125 PetriNetUnfolderBase]: For 552710/552777 co-relation queries the response was YES. [2024-05-12 10:46:31,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57262 conditions, 9049 events. 5436/9049 cut-off events. For 552710/552777 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 66164 event pairs, 1770 based on Foata normal form. 13/8578 useless extension candidates. Maximal degree in co-relation 57073. Up to 7854 conditions per place. [2024-05-12 10:46:31,708 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 402 selfloop transitions, 162 changer transitions 0/577 dead transitions. [2024-05-12 10:46:31,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 577 transitions, 11797 flow [2024-05-12 10:46:31,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:46:31,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:46:31,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-05-12 10:46:31,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180124223602484 [2024-05-12 10:46:31,709 INFO L175 Difference]: Start difference. First operand has 453 places, 547 transitions, 10579 flow. Second operand 7 states and 199 transitions. [2024-05-12 10:46:31,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 577 transitions, 11797 flow [2024-05-12 10:46:35,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 577 transitions, 11474 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-05-12 10:46:35,965 INFO L231 Difference]: Finished difference. Result has 455 places, 548 transitions, 10713 flow [2024-05-12 10:46:35,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10256, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10713, PETRI_PLACES=455, PETRI_TRANSITIONS=548} [2024-05-12 10:46:35,966 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 405 predicate places. [2024-05-12 10:46:35,966 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 548 transitions, 10713 flow [2024-05-12 10:46:35,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:35,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:35,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:35,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-05-12 10:46:35,967 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:35,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:35,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1245033068, now seen corresponding path program 7 times [2024-05-12 10:46:35,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:35,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717259634] [2024-05-12 10:46:35,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:35,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:36,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:36,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717259634] [2024-05-12 10:46:36,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717259634] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:36,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:36,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:46:36,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353631406] [2024-05-12 10:46:36,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:36,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:46:36,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:36,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:46:36,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:46:36,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:46:36,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 548 transitions, 10713 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:36,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:36,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:46:36,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:38,688 INFO L124 PetriNetUnfolderBase]: 5575/9339 cut-off events. [2024-05-12 10:46:38,689 INFO L125 PetriNetUnfolderBase]: For 643225/643279 co-relation queries the response was YES. [2024-05-12 10:46:38,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60546 conditions, 9339 events. 5575/9339 cut-off events. For 643225/643279 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 68808 event pairs, 1760 based on Foata normal form. 2/8858 useless extension candidates. Maximal degree in co-relation 60355. Up to 7951 conditions per place. [2024-05-12 10:46:38,829 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 477 selfloop transitions, 99 changer transitions 0/589 dead transitions. [2024-05-12 10:46:38,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 589 transitions, 12327 flow [2024-05-12 10:46:38,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:46:38,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:46:38,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-05-12 10:46:38,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6032608695652174 [2024-05-12 10:46:38,830 INFO L175 Difference]: Start difference. First operand has 455 places, 548 transitions, 10713 flow. Second operand 8 states and 222 transitions. [2024-05-12 10:46:38,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 589 transitions, 12327 flow [2024-05-12 10:46:44,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 589 transitions, 12104 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 10:46:44,742 INFO L231 Difference]: Finished difference. Result has 459 places, 552 transitions, 10831 flow [2024-05-12 10:46:44,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10490, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10831, PETRI_PLACES=459, PETRI_TRANSITIONS=552} [2024-05-12 10:46:44,742 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 409 predicate places. [2024-05-12 10:46:44,742 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 552 transitions, 10831 flow [2024-05-12 10:46:44,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:44,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:44,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:46:44,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-05-12 10:46:44,743 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:44,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:44,743 INFO L85 PathProgramCache]: Analyzing trace with hash 691998062, now seen corresponding path program 8 times [2024-05-12 10:46:44,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:44,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676540676] [2024-05-12 10:46:44,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:44,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:45,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:45,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676540676] [2024-05-12 10:46:45,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676540676] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:45,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:45,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:46:45,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17997496] [2024-05-12 10:46:45,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:45,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:46:45,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:45,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:46:45,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:46:45,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:46:45,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 552 transitions, 10831 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:45,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:45,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:46:45,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:47,517 INFO L124 PetriNetUnfolderBase]: 5596/9311 cut-off events. [2024-05-12 10:46:47,518 INFO L125 PetriNetUnfolderBase]: For 656039/656092 co-relation queries the response was YES. [2024-05-12 10:46:47,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61312 conditions, 9311 events. 5596/9311 cut-off events. For 656039/656092 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 68290 event pairs, 1812 based on Foata normal form. 2/8821 useless extension candidates. Maximal degree in co-relation 61119. Up to 8215 conditions per place. [2024-05-12 10:46:47,667 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 483 selfloop transitions, 88 changer transitions 0/584 dead transitions. [2024-05-12 10:46:47,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 584 transitions, 12112 flow [2024-05-12 10:46:47,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:46:47,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:46:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-05-12 10:46:47,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5842391304347826 [2024-05-12 10:46:47,668 INFO L175 Difference]: Start difference. First operand has 459 places, 552 transitions, 10831 flow. Second operand 8 states and 215 transitions. [2024-05-12 10:46:47,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 584 transitions, 12112 flow [2024-05-12 10:46:54,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 584 transitions, 11883 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-05-12 10:46:54,691 INFO L231 Difference]: Finished difference. Result has 461 places, 554 transitions, 10852 flow [2024-05-12 10:46:54,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10606, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10852, PETRI_PLACES=461, PETRI_TRANSITIONS=554} [2024-05-12 10:46:54,692 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 411 predicate places. [2024-05-12 10:46:54,692 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 554 transitions, 10852 flow [2024-05-12 10:46:54,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:54,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:46:54,692 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, 1] [2024-05-12 10:46:54,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-05-12 10:46:54,693 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:46:54,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:46:54,693 INFO L85 PathProgramCache]: Analyzing trace with hash 565709470, now seen corresponding path program 9 times [2024-05-12 10:46:54,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:46:54,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342213141] [2024-05-12 10:46:54,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:46:54,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:46:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:46:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:46:55,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:46:55,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342213141] [2024-05-12 10:46:55,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342213141] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:46:55,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:46:55,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:46:55,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470183387] [2024-05-12 10:46:55,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:46:55,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:46:55,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:46:55,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:46:55,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:46:55,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:46:55,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 554 transitions, 10852 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:46:55,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:46:55,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:46:55,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:46:57,501 INFO L124 PetriNetUnfolderBase]: 5573/9266 cut-off events. [2024-05-12 10:46:57,501 INFO L125 PetriNetUnfolderBase]: For 640964/641033 co-relation queries the response was YES. [2024-05-12 10:46:57,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59530 conditions, 9266 events. 5573/9266 cut-off events. For 640964/641033 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 67828 event pairs, 1421 based on Foata normal form. 22/8804 useless extension candidates. Maximal degree in co-relation 59336. Up to 7322 conditions per place. [2024-05-12 10:46:57,647 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 494 selfloop transitions, 82 changer transitions 0/589 dead transitions. [2024-05-12 10:46:57,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 589 transitions, 12380 flow [2024-05-12 10:46:57,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:46:57,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:46:57,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-05-12 10:46:57,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-05-12 10:46:57,648 INFO L175 Difference]: Start difference. First operand has 461 places, 554 transitions, 10852 flow. Second operand 6 states and 180 transitions. [2024-05-12 10:46:57,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 589 transitions, 12380 flow [2024-05-12 10:47:03,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 589 transitions, 12173 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-05-12 10:47:03,469 INFO L231 Difference]: Finished difference. Result has 461 places, 554 transitions, 10821 flow [2024-05-12 10:47:03,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10645, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10821, PETRI_PLACES=461, PETRI_TRANSITIONS=554} [2024-05-12 10:47:03,470 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 411 predicate places. [2024-05-12 10:47:03,470 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 554 transitions, 10821 flow [2024-05-12 10:47:03,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:03,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:03,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:03,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-05-12 10:47:03,471 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:03,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:03,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1544818960, now seen corresponding path program 10 times [2024-05-12 10:47:03,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:03,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874437086] [2024-05-12 10:47:03,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:03,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:03,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:03,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874437086] [2024-05-12 10:47:03,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874437086] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:03,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:03,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:03,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873769928] [2024-05-12 10:47:03,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:03,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:03,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:03,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:03,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:03,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:47:03,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 554 transitions, 10821 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:03,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:03,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:47:03,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:06,033 INFO L124 PetriNetUnfolderBase]: 5543/9232 cut-off events. [2024-05-12 10:47:06,033 INFO L125 PetriNetUnfolderBase]: For 577155/577225 co-relation queries the response was YES. [2024-05-12 10:47:06,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58325 conditions, 9232 events. 5543/9232 cut-off events. For 577155/577225 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 67751 event pairs, 1797 based on Foata normal form. 22/8757 useless extension candidates. Maximal degree in co-relation 58130. Up to 8017 conditions per place. [2024-05-12 10:47:06,474 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 490 selfloop transitions, 79 changer transitions 0/582 dead transitions. [2024-05-12 10:47:06,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 582 transitions, 12053 flow [2024-05-12 10:47:06,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:47:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:47:06,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-05-12 10:47:06,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 10:47:06,476 INFO L175 Difference]: Start difference. First operand has 461 places, 554 transitions, 10821 flow. Second operand 6 states and 174 transitions. [2024-05-12 10:47:06,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 582 transitions, 12053 flow [2024-05-12 10:47:11,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 582 transitions, 11835 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-05-12 10:47:11,703 INFO L231 Difference]: Finished difference. Result has 462 places, 554 transitions, 10774 flow [2024-05-12 10:47:11,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10603, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10774, PETRI_PLACES=462, PETRI_TRANSITIONS=554} [2024-05-12 10:47:11,704 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 412 predicate places. [2024-05-12 10:47:11,704 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 554 transitions, 10774 flow [2024-05-12 10:47:11,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:11,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:11,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:11,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-05-12 10:47:11,705 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:11,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:11,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1598351980, now seen corresponding path program 11 times [2024-05-12 10:47:11,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:11,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148762267] [2024-05-12 10:47:11,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:11,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:12,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:12,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148762267] [2024-05-12 10:47:12,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148762267] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:12,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:12,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:12,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194417797] [2024-05-12 10:47:12,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:12,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:12,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:12,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:12,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:12,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:47:12,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 554 transitions, 10774 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:12,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:12,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:47:12,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:14,325 INFO L124 PetriNetUnfolderBase]: 5564/9249 cut-off events. [2024-05-12 10:47:14,325 INFO L125 PetriNetUnfolderBase]: For 513388/513458 co-relation queries the response was YES. [2024-05-12 10:47:14,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57708 conditions, 9249 events. 5564/9249 cut-off events. For 513388/513458 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 67655 event pairs, 1255 based on Foata normal form. 14/8785 useless extension candidates. Maximal degree in co-relation 57514. Up to 6902 conditions per place. [2024-05-12 10:47:14,460 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 486 selfloop transitions, 96 changer transitions 0/595 dead transitions. [2024-05-12 10:47:14,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 595 transitions, 12377 flow [2024-05-12 10:47:14,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:47:14,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:47:14,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 10:47:14,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-05-12 10:47:14,461 INFO L175 Difference]: Start difference. First operand has 462 places, 554 transitions, 10774 flow. Second operand 7 states and 204 transitions. [2024-05-12 10:47:14,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 595 transitions, 12377 flow [2024-05-12 10:47:19,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 595 transitions, 12115 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-05-12 10:47:19,444 INFO L231 Difference]: Finished difference. Result has 461 places, 556 transitions, 10762 flow [2024-05-12 10:47:19,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10516, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10762, PETRI_PLACES=461, PETRI_TRANSITIONS=556} [2024-05-12 10:47:19,445 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 411 predicate places. [2024-05-12 10:47:19,445 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 556 transitions, 10762 flow [2024-05-12 10:47:19,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:19,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:19,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:19,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-05-12 10:47:19,445 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:19,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:19,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1598559370, now seen corresponding path program 12 times [2024-05-12 10:47:19,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:19,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275607284] [2024-05-12 10:47:19,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:19,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:19,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:19,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:19,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:19,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275607284] [2024-05-12 10:47:19,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275607284] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:19,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:19,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:19,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810317190] [2024-05-12 10:47:19,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:19,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:19,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:19,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:19,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:19,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:47:19,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 556 transitions, 10762 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:19,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:19,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:47:19,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:21,992 INFO L124 PetriNetUnfolderBase]: 5539/9208 cut-off events. [2024-05-12 10:47:21,993 INFO L125 PetriNetUnfolderBase]: For 489428/489497 co-relation queries the response was YES. [2024-05-12 10:47:22,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56619 conditions, 9208 events. 5539/9208 cut-off events. For 489428/489497 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 67373 event pairs, 1266 based on Foata normal form. 20/8748 useless extension candidates. Maximal degree in co-relation 56425. Up to 6888 conditions per place. [2024-05-12 10:47:22,444 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 488 selfloop transitions, 91 changer transitions 0/592 dead transitions. [2024-05-12 10:47:22,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 592 transitions, 12056 flow [2024-05-12 10:47:22,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:47:22,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:47:22,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-05-12 10:47:22,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180124223602484 [2024-05-12 10:47:22,445 INFO L175 Difference]: Start difference. First operand has 461 places, 556 transitions, 10762 flow. Second operand 7 states and 199 transitions. [2024-05-12 10:47:22,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 592 transitions, 12056 flow [2024-05-12 10:47:26,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 592 transitions, 11812 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-05-12 10:47:26,651 INFO L231 Difference]: Finished difference. Result has 464 places, 556 transitions, 10706 flow [2024-05-12 10:47:26,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10518, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10706, PETRI_PLACES=464, PETRI_TRANSITIONS=556} [2024-05-12 10:47:26,652 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 414 predicate places. [2024-05-12 10:47:26,652 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 556 transitions, 10706 flow [2024-05-12 10:47:26,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:26,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:26,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:47:26,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-05-12 10:47:26,653 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:26,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:26,653 INFO L85 PathProgramCache]: Analyzing trace with hash -710074698, now seen corresponding path program 1 times [2024-05-12 10:47:26,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:26,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391611259] [2024-05-12 10:47:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:26,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:27,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:27,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391611259] [2024-05-12 10:47:27,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391611259] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:27,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:27,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:47:27,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056854334] [2024-05-12 10:47:27,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:27,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:47:27,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:27,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:47:27,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:47:27,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:47:27,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 556 transitions, 10706 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:27,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:27,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:47:27,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:29,346 INFO L124 PetriNetUnfolderBase]: 5724/9474 cut-off events. [2024-05-12 10:47:29,346 INFO L125 PetriNetUnfolderBase]: For 569994/570041 co-relation queries the response was YES. [2024-05-12 10:47:29,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59000 conditions, 9474 events. 5724/9474 cut-off events. For 569994/570041 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 69202 event pairs, 1543 based on Foata normal form. 12/8977 useless extension candidates. Maximal degree in co-relation 58805. Up to 5714 conditions per place. [2024-05-12 10:47:29,481 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 453 selfloop transitions, 143 changer transitions 0/609 dead transitions. [2024-05-12 10:47:29,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 609 transitions, 12592 flow [2024-05-12 10:47:29,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:47:29,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:47:29,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 270 transitions. [2024-05-12 10:47:29,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-05-12 10:47:29,483 INFO L175 Difference]: Start difference. First operand has 464 places, 556 transitions, 10706 flow. Second operand 10 states and 270 transitions. [2024-05-12 10:47:29,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 609 transitions, 12592 flow [2024-05-12 10:47:35,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 609 transitions, 12383 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-05-12 10:47:35,147 INFO L231 Difference]: Finished difference. Result has 467 places, 559 transitions, 10825 flow [2024-05-12 10:47:35,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10497, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10825, PETRI_PLACES=467, PETRI_TRANSITIONS=559} [2024-05-12 10:47:35,148 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 417 predicate places. [2024-05-12 10:47:35,148 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 559 transitions, 10825 flow [2024-05-12 10:47:35,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:35,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:35,149 INFO L208 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] [2024-05-12 10:47:35,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-05-12 10:47:35,149 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:35,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:35,149 INFO L85 PathProgramCache]: Analyzing trace with hash -709954542, now seen corresponding path program 1 times [2024-05-12 10:47:35,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:35,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431646701] [2024-05-12 10:47:35,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:35,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:35,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:35,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:35,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431646701] [2024-05-12 10:47:35,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431646701] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:35,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:35,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:47:35,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712222334] [2024-05-12 10:47:35,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:35,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:47:35,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:35,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:47:35,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:47:35,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:47:35,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 559 transitions, 10825 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:35,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:35,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:47:35,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:38,150 INFO L124 PetriNetUnfolderBase]: 5864/9885 cut-off events. [2024-05-12 10:47:38,150 INFO L125 PetriNetUnfolderBase]: For 626338/626398 co-relation queries the response was YES. [2024-05-12 10:47:38,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61369 conditions, 9885 events. 5864/9885 cut-off events. For 626338/626398 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 73846 event pairs, 1546 based on Foata normal form. 18/9426 useless extension candidates. Maximal degree in co-relation 61173. Up to 6449 conditions per place. [2024-05-12 10:47:38,303 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 487 selfloop transitions, 109 changer transitions 0/609 dead transitions. [2024-05-12 10:47:38,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 609 transitions, 12751 flow [2024-05-12 10:47:38,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:47:38,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:47:38,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-05-12 10:47:38,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141304347826086 [2024-05-12 10:47:38,304 INFO L175 Difference]: Start difference. First operand has 467 places, 559 transitions, 10825 flow. Second operand 8 states and 226 transitions. [2024-05-12 10:47:38,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 609 transitions, 12751 flow [2024-05-12 10:47:44,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 609 transitions, 12605 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-05-12 10:47:44,799 INFO L231 Difference]: Finished difference. Result has 472 places, 563 transitions, 10972 flow [2024-05-12 10:47:44,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10681, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10972, PETRI_PLACES=472, PETRI_TRANSITIONS=563} [2024-05-12 10:47:44,799 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 422 predicate places. [2024-05-12 10:47:44,800 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 563 transitions, 10972 flow [2024-05-12 10:47:44,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:44,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:44,800 INFO L208 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] [2024-05-12 10:47:44,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-05-12 10:47:44,800 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:44,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:44,801 INFO L85 PathProgramCache]: Analyzing trace with hash -709954728, now seen corresponding path program 2 times [2024-05-12 10:47:44,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:44,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572125995] [2024-05-12 10:47:44,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:44,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:45,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:45,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572125995] [2024-05-12 10:47:45,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572125995] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:45,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:45,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:47:45,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733343231] [2024-05-12 10:47:45,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:45,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:47:45,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:45,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:47:45,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:47:45,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:47:45,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 563 transitions, 10972 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:45,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:45,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:47:45,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:47,517 INFO L124 PetriNetUnfolderBase]: 5917/9834 cut-off events. [2024-05-12 10:47:47,517 INFO L125 PetriNetUnfolderBase]: For 638533/638602 co-relation queries the response was YES. [2024-05-12 10:47:47,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62611 conditions, 9834 events. 5917/9834 cut-off events. For 638533/638602 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 72980 event pairs, 1544 based on Foata normal form. 18/9364 useless extension candidates. Maximal degree in co-relation 62412. Up to 8472 conditions per place. [2024-05-12 10:47:47,665 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 534 selfloop transitions, 55 changer transitions 0/602 dead transitions. [2024-05-12 10:47:47,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 602 transitions, 12272 flow [2024-05-12 10:47:47,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:47:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:47:47,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-05-12 10:47:47,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5815217391304348 [2024-05-12 10:47:47,666 INFO L175 Difference]: Start difference. First operand has 472 places, 563 transitions, 10972 flow. Second operand 8 states and 214 transitions. [2024-05-12 10:47:47,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 602 transitions, 12272 flow [2024-05-12 10:47:53,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 602 transitions, 12083 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-05-12 10:47:53,859 INFO L231 Difference]: Finished difference. Result has 476 places, 564 transitions, 10907 flow [2024-05-12 10:47:53,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=10783, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10907, PETRI_PLACES=476, PETRI_TRANSITIONS=564} [2024-05-12 10:47:53,860 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 426 predicate places. [2024-05-12 10:47:53,860 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 564 transitions, 10907 flow [2024-05-12 10:47:53,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:53,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:47:53,860 INFO L208 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] [2024-05-12 10:47:53,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-05-12 10:47:53,861 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:47:53,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:47:53,861 INFO L85 PathProgramCache]: Analyzing trace with hash -532823208, now seen corresponding path program 3 times [2024-05-12 10:47:53,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:47:53,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835860029] [2024-05-12 10:47:53,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:47:53,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:47:53,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:47:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:47:54,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:47:54,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835860029] [2024-05-12 10:47:54,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835860029] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:47:54,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:47:54,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:47:54,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514873959] [2024-05-12 10:47:54,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:47:54,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:47:54,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:47:54,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:47:54,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:47:54,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:47:54,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 564 transitions, 10907 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:47:54,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:47:54,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:47:54,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:47:56,861 INFO L124 PetriNetUnfolderBase]: 5970/9927 cut-off events. [2024-05-12 10:47:56,862 INFO L125 PetriNetUnfolderBase]: For 646431/646500 co-relation queries the response was YES. [2024-05-12 10:47:56,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62407 conditions, 9927 events. 5970/9927 cut-off events. For 646431/646500 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 73883 event pairs, 1504 based on Foata normal form. 18/9457 useless extension candidates. Maximal degree in co-relation 62207. Up to 8082 conditions per place. [2024-05-12 10:47:57,008 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 540 selfloop transitions, 59 changer transitions 0/612 dead transitions. [2024-05-12 10:47:57,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 612 transitions, 12515 flow [2024-05-12 10:47:57,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:47:57,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:47:57,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-05-12 10:47:57,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-05-12 10:47:57,009 INFO L175 Difference]: Start difference. First operand has 476 places, 564 transitions, 10907 flow. Second operand 8 states and 224 transitions. [2024-05-12 10:47:57,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 612 transitions, 12515 flow