./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe037.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe037.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe037.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe037.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 20:51:01,741 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:51:01,823 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:51:01,828 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:51:01,828 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:51:01,849 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:51:01,850 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:51:01,850 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:51:01,851 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:51:01,854 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:51:01,854 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:51:01,854 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:51:01,855 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:51:01,856 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:51:01,856 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:51:01,856 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:51:01,856 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:51:01,857 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:51:01,857 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:51:01,857 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:51:01,857 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:51:01,857 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:51:01,858 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:51:01,858 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:51:01,858 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:51:01,858 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:51:01,858 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:51:01,859 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:51:01,859 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:51:01,859 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:51:01,860 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:51:01,860 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:51:01,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:51:01,861 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:51:01,861 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:51:01,861 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:51:01,861 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:51:01,861 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:51:01,861 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:51:01,862 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:51:01,862 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:51:01,862 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:51:01,862 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:51:01,862 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:51:02,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:51:02,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:51:02,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:51:02,065 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:51:02,066 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:51:02,066 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe037.i [2024-06-03 20:51:03,072 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:51:03,304 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:51:03,305 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe037.i [2024-06-03 20:51:03,328 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c7ca80cc/ccebe72de7cb4afd97838e962e46638a/FLAG1af471c05 [2024-06-03 20:51:03,341 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c7ca80cc/ccebe72de7cb4afd97838e962e46638a [2024-06-03 20:51:03,343 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:51:03,344 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:51:03,346 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe037.yml/witness.yml [2024-06-03 20:51:03,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:51:03,468 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:51:03,469 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:51:03,469 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:51:03,473 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:51:03,473 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:51:03" (1/2) ... [2024-06-03 20:51:03,474 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cc2cb46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:51:03, skipping insertion in model container [2024-06-03 20:51:03,474 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:51:03" (1/2) ... [2024-06-03 20:51:03,475 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5d62e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:51:03, skipping insertion in model container [2024-06-03 20:51:03,475 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:51:03" (2/2) ... [2024-06-03 20:51:03,476 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cc2cb46 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:51:03, skipping insertion in model container [2024-06-03 20:51:03,476 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:51:03" (2/2) ... [2024-06-03 20:51:03,476 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:51:03,514 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:51:03,515 INFO L97 edCorrectnessWitness]: Location invariant before [L792-L792] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL && (1LL - (long long )__unbuffered_p2_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (1LL + (long long )x) - (long long )z >= 0LL) && (1LL + (long long )y) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 20:51:03,515 INFO L97 edCorrectnessWitness]: Location invariant before [L789-L789] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL && (1LL - (long long )__unbuffered_p2_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (1LL + (long long )main$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_EAX) - (long long )z >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 20:51:03,515 INFO L97 edCorrectnessWitness]: Location invariant before [L791-L791] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL && (1LL - (long long )__unbuffered_p2_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (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_EAX) - (long long )z >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 20:51:03,515 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:51:03,516 INFO L106 edCorrectnessWitness]: ghost_update [L787-L787] multithreaded = 1; [2024-06-03 20:51:03,574 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:51:03,879 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:51:03,886 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:51:04,013 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:51:04,055 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:51:04,056 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:51:04 WrapperNode [2024-06-03 20:51:04,056 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:51:04,057 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:51:04,057 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:51:04,057 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:51:04,063 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 03.06 08:51:04" (1/1) ... [2024-06-03 20:51:04,088 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 03.06 08:51:04" (1/1) ... [2024-06-03 20:51:04,118 INFO L138 Inliner]: procedures = 175, calls = 48, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2024-06-03 20:51:04,119 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:51:04,120 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:51:04,120 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:51:04,120 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:51:04,128 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:51:04" (1/1) ... [2024-06-03 20:51:04,128 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:51:04" (1/1) ... [2024-06-03 20:51:04,137 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:51:04" (1/1) ... [2024-06-03 20:51:04,156 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 20:51:04,157 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:51:04" (1/1) ... [2024-06-03 20:51:04,157 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:51:04" (1/1) ... [2024-06-03 20:51:04,172 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:51:04" (1/1) ... [2024-06-03 20:51:04,173 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:51:04" (1/1) ... [2024-06-03 20:51:04,174 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:51:04" (1/1) ... [2024-06-03 20:51:04,178 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:51:04" (1/1) ... [2024-06-03 20:51:04,181 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:51:04,184 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:51:04,184 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:51:04,184 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:51:04,185 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:51:04" (1/1) ... [2024-06-03 20:51:04,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:51:04,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:51:04,206 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 20:51:04,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 20:51:04,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:51:04,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:51:04,236 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:51:04,236 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:51:04,236 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:51:04,237 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:51:04,237 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:51:04,237 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:51:04,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:51:04,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:51:04,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:51:04,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:51:04,238 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 20:51:04,357 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:51:04,359 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:51:04,631 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:51:04,631 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:51:04,712 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:51:04,712 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:51:04,713 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:51:04 BoogieIcfgContainer [2024-06-03 20:51:04,713 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:51:04,714 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:51:04,714 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:51:04,716 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:51:04,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:51:03" (1/4) ... [2024-06-03 20:51:04,717 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c21aa6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:51:04, skipping insertion in model container [2024-06-03 20:51:04,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:51:03" (2/4) ... [2024-06-03 20:51:04,717 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c21aa6a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:51:04, skipping insertion in model container [2024-06-03 20:51:04,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:51:04" (3/4) ... [2024-06-03 20:51:04,718 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c21aa6a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:51:04, skipping insertion in model container [2024-06-03 20:51:04,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:51:04" (4/4) ... [2024-06-03 20:51:04,719 INFO L112 eAbstractionObserver]: Analyzing ICFG safe037.i [2024-06-03 20:51:04,732 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:51:04,732 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 20:51:04,732 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:51:04,763 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:51:04,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-03 20:51:04,804 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-03 20:51:04,805 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:51:04,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 74 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 20:51:04,806 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-03 20:51:04,808 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-03 20:51:04,814 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:51:04,818 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;@4d612693, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:51:04,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 20:51:04,821 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:51:04,822 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 20:51:04,822 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:51:04,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:04,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:51:04,823 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:04,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:04,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1558372378, now seen corresponding path program 1 times [2024-06-03 20:51:04,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:04,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954521305] [2024-06-03 20:51:04,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:04,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:05,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:05,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954521305] [2024-06-03 20:51:05,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954521305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:05,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:05,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:51:05,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720626997] [2024-06-03 20:51:05,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:05,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:51:05,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:05,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:51:05,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:51:05,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 44 [2024-06-03 20:51:05,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:05,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:05,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 44 [2024-06-03 20:51:05,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:05,674 INFO L124 PetriNetUnfolderBase]: 471/887 cut-off events. [2024-06-03 20:51:05,675 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-03 20:51:05,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 887 events. 471/887 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4817 event pairs, 288 based on Foata normal form. 1/815 useless extension candidates. Maximal degree in co-relation 1662. Up to 733 conditions per place. [2024-06-03 20:51:05,682 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 29 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-03 20:51:05,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 171 flow [2024-06-03 20:51:05,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:51:05,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:51:05,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-03 20:51:05,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7045454545454546 [2024-06-03 20:51:05,692 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 93 transitions. [2024-06-03 20:51:05,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 171 flow [2024-06-03 20:51:05,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:51:05,696 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-03 20:51:05,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-03 20:51:05,700 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-03 20:51:05,700 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-03 20:51:05,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:05,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:05,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:05,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:51:05,701 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:05,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:05,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1347776261, now seen corresponding path program 1 times [2024-06-03 20:51:05,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:05,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081374158] [2024-06-03 20:51:05,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:05,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:06,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:06,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081374158] [2024-06-03 20:51:06,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081374158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:06,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:06,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:51:06,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287559612] [2024-06-03 20:51:06,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:06,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:51:06,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:06,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:51:06,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:51:06,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2024-06-03 20:51:06,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:06,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:06,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2024-06-03 20:51:06,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:06,184 INFO L124 PetriNetUnfolderBase]: 569/991 cut-off events. [2024-06-03 20:51:06,184 INFO L125 PetriNetUnfolderBase]: For 204/204 co-relation queries the response was YES. [2024-06-03 20:51:06,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2228 conditions, 991 events. 569/991 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5233 event pairs, 293 based on Foata normal form. 3/962 useless extension candidates. Maximal degree in co-relation 2213. Up to 861 conditions per place. [2024-06-03 20:51:06,190 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 37 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-03 20:51:06,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 240 flow [2024-06-03 20:51:06,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:51:06,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:51:06,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-06-03 20:51:06,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6761363636363636 [2024-06-03 20:51:06,191 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 119 transitions. [2024-06-03 20:51:06,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 240 flow [2024-06-03 20:51:06,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:51:06,193 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-03 20:51:06,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-03 20:51:06,194 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-03 20:51:06,194 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-03 20:51:06,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:06,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:06,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:06,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:51:06,195 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:06,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:06,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1155941006, now seen corresponding path program 1 times [2024-06-03 20:51:06,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:06,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102052365] [2024-06-03 20:51:06,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:06,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:06,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:06,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:06,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102052365] [2024-06-03 20:51:06,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102052365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:06,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:06,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:51:06,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937040270] [2024-06-03 20:51:06,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:06,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:51:06,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:06,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:51:06,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:51:06,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2024-06-03 20:51:06,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 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) [2024-06-03 20:51:06,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:06,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2024-06-03 20:51:06,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:06,855 INFO L124 PetriNetUnfolderBase]: 590/1136 cut-off events. [2024-06-03 20:51:06,855 INFO L125 PetriNetUnfolderBase]: For 569/569 co-relation queries the response was YES. [2024-06-03 20:51:06,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2723 conditions, 1136 events. 590/1136 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6345 event pairs, 313 based on Foata normal form. 2/1112 useless extension candidates. Maximal degree in co-relation 2706. Up to 903 conditions per place. [2024-06-03 20:51:06,860 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 37 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-03 20:51:06,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 270 flow [2024-06-03 20:51:06,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:51:06,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:51:06,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-06-03 20:51:06,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6534090909090909 [2024-06-03 20:51:06,862 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 4 states and 115 transitions. [2024-06-03 20:51:06,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 270 flow [2024-06-03 20:51:06,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 256 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 20:51:06,864 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 168 flow [2024-06-03 20:51:06,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-06-03 20:51:06,865 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2024-06-03 20:51:06,865 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 168 flow [2024-06-03 20:51:06,865 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) [2024-06-03 20:51:06,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:06,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:06,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:51:06,866 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:06,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:06,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1786628943, now seen corresponding path program 1 times [2024-06-03 20:51:06,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:06,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434588208] [2024-06-03 20:51:06,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:06,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:07,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:07,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434588208] [2024-06-03 20:51:07,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434588208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:07,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:07,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:51:07,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785158679] [2024-06-03 20:51:07,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:07,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:51:07,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:07,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:51:07,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:51:07,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:07,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 168 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) [2024-06-03 20:51:07,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:07,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:07,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:07,439 INFO L124 PetriNetUnfolderBase]: 714/1293 cut-off events. [2024-06-03 20:51:07,452 INFO L125 PetriNetUnfolderBase]: For 1149/1197 co-relation queries the response was YES. [2024-06-03 20:51:07,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3429 conditions, 1293 events. 714/1293 cut-off events. For 1149/1197 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7077 event pairs, 212 based on Foata normal form. 6/1264 useless extension candidates. Maximal degree in co-relation 3411. Up to 1030 conditions per place. [2024-06-03 20:51:07,460 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 52 selfloop transitions, 12 changer transitions 0/74 dead transitions. [2024-06-03 20:51:07,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 74 transitions, 380 flow [2024-06-03 20:51:07,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:07,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:07,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-03 20:51:07,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6287878787878788 [2024-06-03 20:51:07,462 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 168 flow. Second operand 6 states and 166 transitions. [2024-06-03 20:51:07,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 74 transitions, 380 flow [2024-06-03 20:51:07,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 74 transitions, 364 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 20:51:07,466 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 211 flow [2024-06-03 20:51:07,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=211, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-03 20:51:07,466 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-06-03 20:51:07,467 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 211 flow [2024-06-03 20:51:07,467 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) [2024-06-03 20:51:07,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:07,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:07,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:51:07,467 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:07,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:07,468 INFO L85 PathProgramCache]: Analyzing trace with hash -915401911, now seen corresponding path program 1 times [2024-06-03 20:51:07,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:07,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228404931] [2024-06-03 20:51:07,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:07,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:07,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:07,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:07,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228404931] [2024-06-03 20:51:07,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228404931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:07,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:07,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:51:07,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343763523] [2024-06-03 20:51:07,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:07,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:51:07,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:07,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:51:07,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:51:07,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:07,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 211 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) [2024-06-03 20:51:07,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:07,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:07,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:07,996 INFO L124 PetriNetUnfolderBase]: 725/1301 cut-off events. [2024-06-03 20:51:07,996 INFO L125 PetriNetUnfolderBase]: For 1865/1915 co-relation queries the response was YES. [2024-06-03 20:51:07,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3811 conditions, 1301 events. 725/1301 cut-off events. For 1865/1915 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7120 event pairs, 270 based on Foata normal form. 4/1268 useless extension candidates. Maximal degree in co-relation 3791. Up to 1062 conditions per place. [2024-06-03 20:51:08,003 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 49 selfloop transitions, 15 changer transitions 0/74 dead transitions. [2024-06-03 20:51:08,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 74 transitions, 441 flow [2024-06-03 20:51:08,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:51:08,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:51:08,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 142 transitions. [2024-06-03 20:51:08,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6454545454545455 [2024-06-03 20:51:08,004 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 211 flow. Second operand 5 states and 142 transitions. [2024-06-03 20:51:08,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 74 transitions, 441 flow [2024-06-03 20:51:08,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 412 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-03 20:51:08,007 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 262 flow [2024-06-03 20:51:08,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-06-03 20:51:08,008 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2024-06-03 20:51:08,008 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 262 flow [2024-06-03 20:51:08,009 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) [2024-06-03 20:51:08,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:08,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:08,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:51:08,009 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:08,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:08,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1021213863, now seen corresponding path program 2 times [2024-06-03 20:51:08,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:08,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026617340] [2024-06-03 20:51:08,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:08,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:08,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:08,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026617340] [2024-06-03 20:51:08,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026617340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:08,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:08,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:51:08,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179348210] [2024-06-03 20:51:08,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:08,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:51:08,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:08,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:51:08,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:51:08,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:08,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 262 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) [2024-06-03 20:51:08,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:08,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:08,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:08,527 INFO L124 PetriNetUnfolderBase]: 720/1291 cut-off events. [2024-06-03 20:51:08,527 INFO L125 PetriNetUnfolderBase]: For 2770/2841 co-relation queries the response was YES. [2024-06-03 20:51:08,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4065 conditions, 1291 events. 720/1291 cut-off events. For 2770/2841 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7020 event pairs, 279 based on Foata normal form. 24/1277 useless extension candidates. Maximal degree in co-relation 4044. Up to 1057 conditions per place. [2024-06-03 20:51:08,535 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 44 selfloop transitions, 15 changer transitions 0/69 dead transitions. [2024-06-03 20:51:08,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 418 flow [2024-06-03 20:51:08,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:51:08,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:51:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-03 20:51:08,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6227272727272727 [2024-06-03 20:51:08,536 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 262 flow. Second operand 5 states and 137 transitions. [2024-06-03 20:51:08,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 418 flow [2024-06-03 20:51:08,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 69 transitions, 390 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-03 20:51:08,540 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 272 flow [2024-06-03 20:51:08,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=272, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-06-03 20:51:08,541 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 15 predicate places. [2024-06-03 20:51:08,541 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 272 flow [2024-06-03 20:51:08,541 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) [2024-06-03 20:51:08,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:08,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:08,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:51:08,542 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:08,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:08,542 INFO L85 PathProgramCache]: Analyzing trace with hash -652497224, now seen corresponding path program 1 times [2024-06-03 20:51:08,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:08,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839036052] [2024-06-03 20:51:08,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:08,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:08,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:08,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:08,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839036052] [2024-06-03 20:51:08,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839036052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:08,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:08,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:51:08,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345703989] [2024-06-03 20:51:08,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:08,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:51:08,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:08,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:51:08,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:51:08,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2024-06-03 20:51:08,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 272 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:08,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:08,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2024-06-03 20:51:08,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:09,062 INFO L124 PetriNetUnfolderBase]: 700/1350 cut-off events. [2024-06-03 20:51:09,063 INFO L125 PetriNetUnfolderBase]: For 2993/2993 co-relation queries the response was YES. [2024-06-03 20:51:09,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4152 conditions, 1350 events. 700/1350 cut-off events. For 2993/2993 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7586 event pairs, 288 based on Foata normal form. 1/1331 useless extension candidates. Maximal degree in co-relation 4129. Up to 1056 conditions per place. [2024-06-03 20:51:09,071 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 44 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2024-06-03 20:51:09,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 410 flow [2024-06-03 20:51:09,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:51:09,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:51:09,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-06-03 20:51:09,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-03 20:51:09,072 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 272 flow. Second operand 4 states and 110 transitions. [2024-06-03 20:51:09,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 410 flow [2024-06-03 20:51:09,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 65 transitions, 368 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 20:51:09,077 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 272 flow [2024-06-03 20:51:09,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-03 20:51:09,077 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-03 20:51:09,078 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 272 flow [2024-06-03 20:51:09,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:09,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:09,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:09,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:51:09,078 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:09,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:09,079 INFO L85 PathProgramCache]: Analyzing trace with hash 766893258, now seen corresponding path program 1 times [2024-06-03 20:51:09,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:09,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474292973] [2024-06-03 20:51:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:09,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:09,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:09,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:09,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474292973] [2024-06-03 20:51:09,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474292973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:09,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:09,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:51:09,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222089342] [2024-06-03 20:51:09,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:09,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:51:09,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:09,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:51:09,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:51:09,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:09,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 272 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:09,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:09,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:09,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:09,662 INFO L124 PetriNetUnfolderBase]: 725/1295 cut-off events. [2024-06-03 20:51:09,662 INFO L125 PetriNetUnfolderBase]: For 3852/3936 co-relation queries the response was YES. [2024-06-03 20:51:09,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4374 conditions, 1295 events. 725/1295 cut-off events. For 3852/3936 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7051 event pairs, 255 based on Foata normal form. 12/1287 useless extension candidates. Maximal degree in co-relation 4351. Up to 1059 conditions per place. [2024-06-03 20:51:09,671 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 53 selfloop transitions, 15 changer transitions 0/78 dead transitions. [2024-06-03 20:51:09,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 78 transitions, 476 flow [2024-06-03 20:51:09,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:51:09,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:51:09,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-03 20:51:09,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-06-03 20:51:09,672 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 272 flow. Second operand 5 states and 140 transitions. [2024-06-03 20:51:09,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 78 transitions, 476 flow [2024-06-03 20:51:09,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 78 transitions, 456 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-03 20:51:09,677 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 322 flow [2024-06-03 20:51:09,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=322, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2024-06-03 20:51:09,677 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 17 predicate places. [2024-06-03 20:51:09,677 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 322 flow [2024-06-03 20:51:09,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:09,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:09,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:09,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:51:09,678 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:09,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:09,679 INFO L85 PathProgramCache]: Analyzing trace with hash -947691904, now seen corresponding path program 2 times [2024-06-03 20:51:09,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:09,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763270464] [2024-06-03 20:51:09,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:09,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:10,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:10,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763270464] [2024-06-03 20:51:10,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763270464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:10,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:10,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:51:10,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954880573] [2024-06-03 20:51:10,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:10,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:51:10,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:10,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:51:10,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:51:10,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:10,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 322 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:10,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:10,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:10,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:10,298 INFO L124 PetriNetUnfolderBase]: 736/1315 cut-off events. [2024-06-03 20:51:10,298 INFO L125 PetriNetUnfolderBase]: For 4914/5024 co-relation queries the response was YES. [2024-06-03 20:51:10,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4785 conditions, 1315 events. 736/1315 cut-off events. For 4914/5024 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7200 event pairs, 253 based on Foata normal form. 32/1328 useless extension candidates. Maximal degree in co-relation 4761. Up to 1037 conditions per place. [2024-06-03 20:51:10,307 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 64 selfloop transitions, 27 changer transitions 0/101 dead transitions. [2024-06-03 20:51:10,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 101 transitions, 678 flow [2024-06-03 20:51:10,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:51:10,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:51:10,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-03 20:51:10,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6193181818181818 [2024-06-03 20:51:10,309 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 322 flow. Second operand 8 states and 218 transitions. [2024-06-03 20:51:10,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 101 transitions, 678 flow [2024-06-03 20:51:10,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 101 transitions, 632 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 20:51:10,314 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 404 flow [2024-06-03 20:51:10,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=404, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-06-03 20:51:10,315 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 21 predicate places. [2024-06-03 20:51:10,315 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 404 flow [2024-06-03 20:51:10,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:10,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:10,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:10,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:51:10,316 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:10,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:10,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1856238190, now seen corresponding path program 3 times [2024-06-03 20:51:10,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:10,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119469113] [2024-06-03 20:51:10,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:10,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:10,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:10,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119469113] [2024-06-03 20:51:10,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119469113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:10,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:10,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:51:10,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584628284] [2024-06-03 20:51:10,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:10,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:51:10,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:10,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:51:10,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:51:10,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:10,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 404 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:10,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:10,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:10,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:10,907 INFO L124 PetriNetUnfolderBase]: 731/1304 cut-off events. [2024-06-03 20:51:10,907 INFO L125 PetriNetUnfolderBase]: For 5630/5756 co-relation queries the response was YES. [2024-06-03 20:51:10,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4951 conditions, 1304 events. 731/1304 cut-off events. For 5630/5756 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 7052 event pairs, 262 based on Foata normal form. 42/1327 useless extension candidates. Maximal degree in co-relation 4927. Up to 1032 conditions per place. [2024-06-03 20:51:10,916 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 59 selfloop transitions, 27 changer transitions 0/96 dead transitions. [2024-06-03 20:51:10,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 652 flow [2024-06-03 20:51:10,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:51:10,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:51:10,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-03 20:51:10,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-03 20:51:10,918 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 404 flow. Second operand 8 states and 212 transitions. [2024-06-03 20:51:10,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 652 flow [2024-06-03 20:51:10,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 96 transitions, 582 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-03 20:51:10,925 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 396 flow [2024-06-03 20:51:10,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=396, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2024-06-03 20:51:10,925 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 25 predicate places. [2024-06-03 20:51:10,925 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 396 flow [2024-06-03 20:51:10,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:10,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:10,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:10,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:51:10,926 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:10,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:10,927 INFO L85 PathProgramCache]: Analyzing trace with hash 215462156, now seen corresponding path program 1 times [2024-06-03 20:51:10,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:10,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158407577] [2024-06-03 20:51:10,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:10,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:10,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:11,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:11,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158407577] [2024-06-03 20:51:11,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158407577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:11,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:11,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:51:11,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714727806] [2024-06-03 20:51:11,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:11,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:51:11,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:11,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:51:11,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:51:11,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:11,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 396 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) [2024-06-03 20:51:11,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:11,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:11,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:11,480 INFO L124 PetriNetUnfolderBase]: 780/1450 cut-off events. [2024-06-03 20:51:11,480 INFO L125 PetriNetUnfolderBase]: For 6060/6090 co-relation queries the response was YES. [2024-06-03 20:51:11,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5331 conditions, 1450 events. 780/1450 cut-off events. For 6060/6090 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7977 event pairs, 256 based on Foata normal form. 4/1430 useless extension candidates. Maximal degree in co-relation 5305. Up to 1155 conditions per place. [2024-06-03 20:51:11,496 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 69 selfloop transitions, 12 changer transitions 0/91 dead transitions. [2024-06-03 20:51:11,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 91 transitions, 650 flow [2024-06-03 20:51:11,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:11,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:11,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-03 20:51:11,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-03 20:51:11,498 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 396 flow. Second operand 6 states and 159 transitions. [2024-06-03 20:51:11,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 91 transitions, 650 flow [2024-06-03 20:51:11,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 91 transitions, 584 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:51:11,504 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 413 flow [2024-06-03 20:51:11,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=413, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2024-06-03 20:51:11,505 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 25 predicate places. [2024-06-03 20:51:11,505 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 413 flow [2024-06-03 20:51:11,505 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) [2024-06-03 20:51:11,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:11,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:11,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:51:11,505 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:11,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:11,506 INFO L85 PathProgramCache]: Analyzing trace with hash 2091287, now seen corresponding path program 1 times [2024-06-03 20:51:11,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:11,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866169891] [2024-06-03 20:51:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:11,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:11,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:11,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866169891] [2024-06-03 20:51:11,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866169891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:11,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:11,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:51:11,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893528093] [2024-06-03 20:51:11,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:11,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:51:11,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:11,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:51:11,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:51:11,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:11,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 413 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:11,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:11,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:11,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:12,083 INFO L124 PetriNetUnfolderBase]: 863/1543 cut-off events. [2024-06-03 20:51:12,084 INFO L125 PetriNetUnfolderBase]: For 8535/8543 co-relation queries the response was YES. [2024-06-03 20:51:12,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6073 conditions, 1543 events. 863/1543 cut-off events. For 8535/8543 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8384 event pairs, 332 based on Foata normal form. 6/1535 useless extension candidates. Maximal degree in co-relation 6045. Up to 1273 conditions per place. [2024-06-03 20:51:12,093 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 66 selfloop transitions, 17 changer transitions 0/96 dead transitions. [2024-06-03 20:51:12,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 96 transitions, 689 flow [2024-06-03 20:51:12,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:51:12,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:51:12,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-03 20:51:12,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6227272727272727 [2024-06-03 20:51:12,094 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 413 flow. Second operand 5 states and 137 transitions. [2024-06-03 20:51:12,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 96 transitions, 689 flow [2024-06-03 20:51:12,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 96 transitions, 650 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 20:51:12,105 INFO L231 Difference]: Finished difference. Result has 73 places, 80 transitions, 481 flow [2024-06-03 20:51:12,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=481, PETRI_PLACES=73, PETRI_TRANSITIONS=80} [2024-06-03 20:51:12,105 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-06-03 20:51:12,106 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 80 transitions, 481 flow [2024-06-03 20:51:12,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:12,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:12,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:12,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:51:12,106 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:12,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:12,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1046528717, now seen corresponding path program 2 times [2024-06-03 20:51:12,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:12,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849731923] [2024-06-03 20:51:12,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:12,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:12,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:12,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849731923] [2024-06-03 20:51:12,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849731923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:12,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:12,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:51:12,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993335559] [2024-06-03 20:51:12,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:12,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:51:12,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:12,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:51:12,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:51:12,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:12,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 80 transitions, 481 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:12,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:12,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:12,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:12,702 INFO L124 PetriNetUnfolderBase]: 860/1521 cut-off events. [2024-06-03 20:51:12,702 INFO L125 PetriNetUnfolderBase]: For 9933/9937 co-relation queries the response was YES. [2024-06-03 20:51:12,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6300 conditions, 1521 events. 860/1521 cut-off events. For 9933/9937 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8241 event pairs, 338 based on Foata normal form. 5/1507 useless extension candidates. Maximal degree in co-relation 6270. Up to 1270 conditions per place. [2024-06-03 20:51:12,710 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 59 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2024-06-03 20:51:12,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 89 transitions, 655 flow [2024-06-03 20:51:12,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:51:12,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:51:12,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-03 20:51:12,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-03 20:51:12,712 INFO L175 Difference]: Start difference. First operand has 73 places, 80 transitions, 481 flow. Second operand 5 states and 130 transitions. [2024-06-03 20:51:12,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 89 transitions, 655 flow [2024-06-03 20:51:12,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 633 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-06-03 20:51:12,720 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 499 flow [2024-06-03 20:51:12,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=499, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2024-06-03 20:51:12,721 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2024-06-03 20:51:12,721 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 499 flow [2024-06-03 20:51:12,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:12,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:12,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:12,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:51:12,722 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:12,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:12,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1038514411, now seen corresponding path program 1 times [2024-06-03 20:51:12,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:12,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792793412] [2024-06-03 20:51:12,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:12,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:12,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:13,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:13,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792793412] [2024-06-03 20:51:13,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792793412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:13,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:13,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:51:13,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511235578] [2024-06-03 20:51:13,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:13,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:51:13,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:13,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:51:13,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:51:13,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:13,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 499 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:13,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:13,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:13,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:13,281 INFO L124 PetriNetUnfolderBase]: 838/1535 cut-off events. [2024-06-03 20:51:13,281 INFO L125 PetriNetUnfolderBase]: For 9236/9308 co-relation queries the response was YES. [2024-06-03 20:51:13,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6183 conditions, 1535 events. 838/1535 cut-off events. For 9236/9308 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8575 event pairs, 265 based on Foata normal form. 1/1501 useless extension candidates. Maximal degree in co-relation 6150. Up to 1242 conditions per place. [2024-06-03 20:51:13,289 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 69 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-06-03 20:51:13,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 99 transitions, 763 flow [2024-06-03 20:51:13,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:51:13,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:51:13,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-03 20:51:13,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6090909090909091 [2024-06-03 20:51:13,291 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 499 flow. Second operand 5 states and 134 transitions. [2024-06-03 20:51:13,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 99 transitions, 763 flow [2024-06-03 20:51:13,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 99 transitions, 726 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-03 20:51:13,302 INFO L231 Difference]: Finished difference. Result has 80 places, 86 transitions, 544 flow [2024-06-03 20:51:13,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=544, PETRI_PLACES=80, PETRI_TRANSITIONS=86} [2024-06-03 20:51:13,303 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-03 20:51:13,303 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 86 transitions, 544 flow [2024-06-03 20:51:13,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:13,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:13,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:13,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:51:13,304 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:13,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:13,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1242748531, now seen corresponding path program 2 times [2024-06-03 20:51:13,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:13,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477609081] [2024-06-03 20:51:13,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:13,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:13,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:13,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477609081] [2024-06-03 20:51:13,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477609081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:13,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:13,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:51:13,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031406730] [2024-06-03 20:51:13,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:13,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:51:13,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:13,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:51:13,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:51:13,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:13,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 86 transitions, 544 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:13,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:13,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:13,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:13,821 INFO L124 PetriNetUnfolderBase]: 835/1531 cut-off events. [2024-06-03 20:51:13,821 INFO L125 PetriNetUnfolderBase]: For 10506/10576 co-relation queries the response was YES. [2024-06-03 20:51:13,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6437 conditions, 1531 events. 835/1531 cut-off events. For 10506/10576 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8614 event pairs, 268 based on Foata normal form. 1/1499 useless extension candidates. Maximal degree in co-relation 6403. Up to 1239 conditions per place. [2024-06-03 20:51:13,830 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 65 selfloop transitions, 17 changer transitions 0/95 dead transitions. [2024-06-03 20:51:13,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 95 transitions, 730 flow [2024-06-03 20:51:13,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:51:13,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:51:13,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-03 20:51:13,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-03 20:51:13,831 INFO L175 Difference]: Start difference. First operand has 80 places, 86 transitions, 544 flow. Second operand 5 states and 130 transitions. [2024-06-03 20:51:13,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 95 transitions, 730 flow [2024-06-03 20:51:13,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 95 transitions, 700 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-03 20:51:13,842 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 555 flow [2024-06-03 20:51:13,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=555, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2024-06-03 20:51:13,843 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 39 predicate places. [2024-06-03 20:51:13,843 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 555 flow [2024-06-03 20:51:13,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:13,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:13,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:13,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:51:13,844 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:13,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:13,845 INFO L85 PathProgramCache]: Analyzing trace with hash -771408469, now seen corresponding path program 1 times [2024-06-03 20:51:13,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:13,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924610697] [2024-06-03 20:51:13,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:13,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:14,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:14,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924610697] [2024-06-03 20:51:14,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924610697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:14,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:14,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:14,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793364507] [2024-06-03 20:51:14,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:14,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:14,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:14,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:14,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:14,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:14,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 555 flow. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:14,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:14,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:14,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:14,633 INFO L124 PetriNetUnfolderBase]: 1005/1775 cut-off events. [2024-06-03 20:51:14,634 INFO L125 PetriNetUnfolderBase]: For 16637/16822 co-relation queries the response was YES. [2024-06-03 20:51:14,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8026 conditions, 1775 events. 1005/1775 cut-off events. For 16637/16822 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10093 event pairs, 241 based on Foata normal form. 36/1774 useless extension candidates. Maximal degree in co-relation 7990. Up to 1237 conditions per place. [2024-06-03 20:51:14,645 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 91 selfloop transitions, 20 changer transitions 0/124 dead transitions. [2024-06-03 20:51:14,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 124 transitions, 971 flow [2024-06-03 20:51:14,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:14,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:14,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-03 20:51:14,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6331168831168831 [2024-06-03 20:51:14,646 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 555 flow. Second operand 7 states and 195 transitions. [2024-06-03 20:51:14,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 124 transitions, 971 flow [2024-06-03 20:51:14,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 124 transitions, 925 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 20:51:14,663 INFO L231 Difference]: Finished difference. Result has 87 places, 89 transitions, 607 flow [2024-06-03 20:51:14,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=607, PETRI_PLACES=87, PETRI_TRANSITIONS=89} [2024-06-03 20:51:14,663 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 42 predicate places. [2024-06-03 20:51:14,665 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 89 transitions, 607 flow [2024-06-03 20:51:14,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:14,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:14,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:14,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:51:14,667 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:14,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:14,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1862964695, now seen corresponding path program 2 times [2024-06-03 20:51:14,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:14,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49325595] [2024-06-03 20:51:14,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:14,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:15,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:15,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49325595] [2024-06-03 20:51:15,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49325595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:15,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:15,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:15,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081574102] [2024-06-03 20:51:15,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:15,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:15,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:15,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:15,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:15,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:15,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 607 flow. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:15,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:15,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:15,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:15,379 INFO L124 PetriNetUnfolderBase]: 969/1727 cut-off events. [2024-06-03 20:51:15,379 INFO L125 PetriNetUnfolderBase]: For 17857/18022 co-relation queries the response was YES. [2024-06-03 20:51:15,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7892 conditions, 1727 events. 969/1727 cut-off events. For 17857/18022 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9802 event pairs, 296 based on Foata normal form. 44/1732 useless extension candidates. Maximal degree in co-relation 7855. Up to 1322 conditions per place. [2024-06-03 20:51:15,389 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 85 selfloop transitions, 17 changer transitions 0/115 dead transitions. [2024-06-03 20:51:15,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 115 transitions, 891 flow [2024-06-03 20:51:15,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-03 20:51:15,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6325757575757576 [2024-06-03 20:51:15,391 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 607 flow. Second operand 6 states and 167 transitions. [2024-06-03 20:51:15,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 115 transitions, 891 flow [2024-06-03 20:51:15,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 115 transitions, 861 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-03 20:51:15,407 INFO L231 Difference]: Finished difference. Result has 90 places, 89 transitions, 620 flow [2024-06-03 20:51:15,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=620, PETRI_PLACES=90, PETRI_TRANSITIONS=89} [2024-06-03 20:51:15,407 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 45 predicate places. [2024-06-03 20:51:15,407 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 89 transitions, 620 flow [2024-06-03 20:51:15,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:15,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:15,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:15,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:51:15,408 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:15,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:15,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1744877015, now seen corresponding path program 3 times [2024-06-03 20:51:15,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:15,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88682147] [2024-06-03 20:51:15,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:15,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:15,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:15,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88682147] [2024-06-03 20:51:15,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88682147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:15,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:15,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:15,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267933300] [2024-06-03 20:51:15,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:15,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:15,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:15,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:15,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:15,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:15,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 89 transitions, 620 flow. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:15,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:15,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:15,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:16,110 INFO L124 PetriNetUnfolderBase]: 1027/1824 cut-off events. [2024-06-03 20:51:16,111 INFO L125 PetriNetUnfolderBase]: For 19924/20089 co-relation queries the response was YES. [2024-06-03 20:51:16,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8446 conditions, 1824 events. 1027/1824 cut-off events. For 19924/20089 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10582 event pairs, 315 based on Foata normal form. 54/1830 useless extension candidates. Maximal degree in co-relation 8407. Up to 1397 conditions per place. [2024-06-03 20:51:16,122 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 88 selfloop transitions, 30 changer transitions 0/131 dead transitions. [2024-06-03 20:51:16,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 131 transitions, 994 flow [2024-06-03 20:51:16,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:51:16,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:51:16,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-03 20:51:16,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-03 20:51:16,124 INFO L175 Difference]: Start difference. First operand has 90 places, 89 transitions, 620 flow. Second operand 9 states and 242 transitions. [2024-06-03 20:51:16,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 131 transitions, 994 flow [2024-06-03 20:51:16,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 131 transitions, 955 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-03 20:51:16,143 INFO L231 Difference]: Finished difference. Result has 94 places, 90 transitions, 670 flow [2024-06-03 20:51:16,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=670, PETRI_PLACES=94, PETRI_TRANSITIONS=90} [2024-06-03 20:51:16,144 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-03 20:51:16,144 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 90 transitions, 670 flow [2024-06-03 20:51:16,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:16,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:16,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:16,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:51:16,145 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:16,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:16,145 INFO L85 PathProgramCache]: Analyzing trace with hash -2043042281, now seen corresponding path program 4 times [2024-06-03 20:51:16,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:16,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177414511] [2024-06-03 20:51:16,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:16,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:16,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:16,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177414511] [2024-06-03 20:51:16,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177414511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:16,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:16,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:16,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759630792] [2024-06-03 20:51:16,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:16,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:16,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:16,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:16,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:16,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:16,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 90 transitions, 670 flow. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:16,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:16,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:16,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:16,841 INFO L124 PetriNetUnfolderBase]: 1060/1889 cut-off events. [2024-06-03 20:51:16,841 INFO L125 PetriNetUnfolderBase]: For 22163/22328 co-relation queries the response was YES. [2024-06-03 20:51:16,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8829 conditions, 1889 events. 1060/1889 cut-off events. For 22163/22328 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10986 event pairs, 326 based on Foata normal form. 54/1899 useless extension candidates. Maximal degree in co-relation 8789. Up to 1456 conditions per place. [2024-06-03 20:51:16,856 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 86 selfloop transitions, 30 changer transitions 0/129 dead transitions. [2024-06-03 20:51:16,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 129 transitions, 1034 flow [2024-06-03 20:51:16,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:51:16,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:51:16,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-03 20:51:16,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.601010101010101 [2024-06-03 20:51:16,858 INFO L175 Difference]: Start difference. First operand has 94 places, 90 transitions, 670 flow. Second operand 9 states and 238 transitions. [2024-06-03 20:51:16,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 129 transitions, 1034 flow [2024-06-03 20:51:16,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 129 transitions, 969 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:51:16,878 INFO L231 Difference]: Finished difference. Result has 96 places, 91 transitions, 696 flow [2024-06-03 20:51:16,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=696, PETRI_PLACES=96, PETRI_TRANSITIONS=91} [2024-06-03 20:51:16,879 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 51 predicate places. [2024-06-03 20:51:16,879 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 91 transitions, 696 flow [2024-06-03 20:51:16,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:16,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:16,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:16,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:51:16,881 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:16,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:16,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1243554795, now seen corresponding path program 1 times [2024-06-03 20:51:16,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:16,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752351556] [2024-06-03 20:51:16,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:16,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:17,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:17,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752351556] [2024-06-03 20:51:17,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752351556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:17,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:17,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:51:17,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012791374] [2024-06-03 20:51:17,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:17,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:51:17,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:17,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:51:17,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:51:17,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:17,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 91 transitions, 696 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) [2024-06-03 20:51:17,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:17,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:17,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:17,520 INFO L124 PetriNetUnfolderBase]: 1233/2120 cut-off events. [2024-06-03 20:51:17,520 INFO L125 PetriNetUnfolderBase]: For 23695/23695 co-relation queries the response was YES. [2024-06-03 20:51:17,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9826 conditions, 2120 events. 1233/2120 cut-off events. For 23695/23695 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11979 event pairs, 363 based on Foata normal form. 4/2119 useless extension candidates. Maximal degree in co-relation 9785. Up to 1813 conditions per place. [2024-06-03 20:51:17,532 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 90 selfloop transitions, 23 changer transitions 0/122 dead transitions. [2024-06-03 20:51:17,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 122 transitions, 1045 flow [2024-06-03 20:51:17,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:17,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:17,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-03 20:51:17,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-03 20:51:17,535 INFO L175 Difference]: Start difference. First operand has 96 places, 91 transitions, 696 flow. Second operand 7 states and 181 transitions. [2024-06-03 20:51:17,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 122 transitions, 1045 flow [2024-06-03 20:51:17,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 122 transitions, 972 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 20:51:17,556 INFO L231 Difference]: Finished difference. Result has 97 places, 97 transitions, 747 flow [2024-06-03 20:51:17,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=747, PETRI_PLACES=97, PETRI_TRANSITIONS=97} [2024-06-03 20:51:17,557 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 52 predicate places. [2024-06-03 20:51:17,557 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 97 transitions, 747 flow [2024-06-03 20:51:17,558 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) [2024-06-03 20:51:17,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:17,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:17,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:51:17,559 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:17,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:17,559 INFO L85 PathProgramCache]: Analyzing trace with hash 890235883, now seen corresponding path program 2 times [2024-06-03 20:51:17,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:17,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343227389] [2024-06-03 20:51:17,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:17,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:17,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:17,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343227389] [2024-06-03 20:51:17,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343227389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:17,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:17,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:51:17,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270886500] [2024-06-03 20:51:17,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:17,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:51:17,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:17,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:51:17,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:51:17,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:17,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 97 transitions, 747 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) [2024-06-03 20:51:17,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:17,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:17,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:18,181 INFO L124 PetriNetUnfolderBase]: 1250/2175 cut-off events. [2024-06-03 20:51:18,181 INFO L125 PetriNetUnfolderBase]: For 25682/25682 co-relation queries the response was YES. [2024-06-03 20:51:18,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10195 conditions, 2175 events. 1250/2175 cut-off events. For 25682/25682 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12459 event pairs, 370 based on Foata normal form. 4/2174 useless extension candidates. Maximal degree in co-relation 10152. Up to 1840 conditions per place. [2024-06-03 20:51:18,195 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 91 selfloop transitions, 28 changer transitions 0/128 dead transitions. [2024-06-03 20:51:18,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 128 transitions, 1123 flow [2024-06-03 20:51:18,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:18,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:18,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-03 20:51:18,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2024-06-03 20:51:18,197 INFO L175 Difference]: Start difference. First operand has 97 places, 97 transitions, 747 flow. Second operand 7 states and 180 transitions. [2024-06-03 20:51:18,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 128 transitions, 1123 flow [2024-06-03 20:51:18,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 128 transitions, 1046 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-03 20:51:18,220 INFO L231 Difference]: Finished difference. Result has 101 places, 104 transitions, 827 flow [2024-06-03 20:51:18,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=827, PETRI_PLACES=101, PETRI_TRANSITIONS=104} [2024-06-03 20:51:18,221 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2024-06-03 20:51:18,221 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 104 transitions, 827 flow [2024-06-03 20:51:18,221 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) [2024-06-03 20:51:18,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:18,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:18,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:51:18,222 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:18,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:18,222 INFO L85 PathProgramCache]: Analyzing trace with hash 900711403, now seen corresponding path program 3 times [2024-06-03 20:51:18,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:18,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711477142] [2024-06-03 20:51:18,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:18,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:18,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:18,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:18,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711477142] [2024-06-03 20:51:18,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711477142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:18,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:18,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:51:18,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552343734] [2024-06-03 20:51:18,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:18,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:51:18,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:18,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:51:18,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:51:18,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:18,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 104 transitions, 827 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) [2024-06-03 20:51:18,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:18,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:18,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:18,819 INFO L124 PetriNetUnfolderBase]: 1242/2163 cut-off events. [2024-06-03 20:51:18,819 INFO L125 PetriNetUnfolderBase]: For 27638/27638 co-relation queries the response was YES. [2024-06-03 20:51:18,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10370 conditions, 2163 events. 1242/2163 cut-off events. For 27638/27638 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12404 event pairs, 318 based on Foata normal form. 4/2162 useless extension candidates. Maximal degree in co-relation 10325. Up to 1751 conditions per place. [2024-06-03 20:51:18,832 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 88 selfloop transitions, 35 changer transitions 0/132 dead transitions. [2024-06-03 20:51:18,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 132 transitions, 1189 flow [2024-06-03 20:51:18,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:18,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:18,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-03 20:51:18,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-03 20:51:18,833 INFO L175 Difference]: Start difference. First operand has 101 places, 104 transitions, 827 flow. Second operand 7 states and 181 transitions. [2024-06-03 20:51:18,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 132 transitions, 1189 flow [2024-06-03 20:51:18,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 132 transitions, 1132 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-03 20:51:18,860 INFO L231 Difference]: Finished difference. Result has 107 places, 107 transitions, 919 flow [2024-06-03 20:51:18,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=919, PETRI_PLACES=107, PETRI_TRANSITIONS=107} [2024-06-03 20:51:18,860 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 62 predicate places. [2024-06-03 20:51:18,861 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 107 transitions, 919 flow [2024-06-03 20:51:18,861 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) [2024-06-03 20:51:18,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:18,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:18,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:51:18,861 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:18,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:18,862 INFO L85 PathProgramCache]: Analyzing trace with hash 843586010, now seen corresponding path program 1 times [2024-06-03 20:51:18,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:18,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002414680] [2024-06-03 20:51:18,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:18,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:19,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:19,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002414680] [2024-06-03 20:51:19,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002414680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:19,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:19,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:51:19,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831543139] [2024-06-03 20:51:19,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:19,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:51:19,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:19,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:51:19,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:51:19,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:19,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 107 transitions, 919 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) [2024-06-03 20:51:19,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:19,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:19,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:19,446 INFO L124 PetriNetUnfolderBase]: 1255/2185 cut-off events. [2024-06-03 20:51:19,446 INFO L125 PetriNetUnfolderBase]: For 30178/30178 co-relation queries the response was YES. [2024-06-03 20:51:19,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10761 conditions, 2185 events. 1255/2185 cut-off events. For 30178/30178 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12523 event pairs, 367 based on Foata normal form. 1/2180 useless extension candidates. Maximal degree in co-relation 10714. Up to 1868 conditions per place. [2024-06-03 20:51:19,458 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 106 selfloop transitions, 31 changer transitions 0/146 dead transitions. [2024-06-03 20:51:19,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 146 transitions, 1447 flow [2024-06-03 20:51:19,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:19,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-03 20:51:19,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-06-03 20:51:19,460 INFO L175 Difference]: Start difference. First operand has 107 places, 107 transitions, 919 flow. Second operand 6 states and 160 transitions. [2024-06-03 20:51:19,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 146 transitions, 1447 flow [2024-06-03 20:51:19,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 146 transitions, 1346 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-03 20:51:19,490 INFO L231 Difference]: Finished difference. Result has 111 places, 125 transitions, 1053 flow [2024-06-03 20:51:19,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1053, PETRI_PLACES=111, PETRI_TRANSITIONS=125} [2024-06-03 20:51:19,491 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-03 20:51:19,491 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 125 transitions, 1053 flow [2024-06-03 20:51:19,491 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) [2024-06-03 20:51:19,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:19,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:19,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:51:19,492 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:19,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:19,492 INFO L85 PathProgramCache]: Analyzing trace with hash 2009764566, now seen corresponding path program 2 times [2024-06-03 20:51:19,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:19,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729404510] [2024-06-03 20:51:19,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:19,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:19,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:19,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729404510] [2024-06-03 20:51:19,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729404510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:19,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:19,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:51:19,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143477499] [2024-06-03 20:51:19,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:19,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:51:19,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:19,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:51:19,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:51:19,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:19,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 125 transitions, 1053 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) [2024-06-03 20:51:19,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:19,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:19,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:20,080 INFO L124 PetriNetUnfolderBase]: 1268/2207 cut-off events. [2024-06-03 20:51:20,080 INFO L125 PetriNetUnfolderBase]: For 33066/33066 co-relation queries the response was YES. [2024-06-03 20:51:20,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11163 conditions, 2207 events. 1268/2207 cut-off events. For 33066/33066 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12655 event pairs, 367 based on Foata normal form. 1/2202 useless extension candidates. Maximal degree in co-relation 11113. Up to 1883 conditions per place. [2024-06-03 20:51:20,093 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 103 selfloop transitions, 37 changer transitions 0/149 dead transitions. [2024-06-03 20:51:20,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 149 transitions, 1528 flow [2024-06-03 20:51:20,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:20,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-03 20:51:20,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946969696969697 [2024-06-03 20:51:20,095 INFO L175 Difference]: Start difference. First operand has 111 places, 125 transitions, 1053 flow. Second operand 6 states and 157 transitions. [2024-06-03 20:51:20,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 149 transitions, 1528 flow [2024-06-03 20:51:20,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 149 transitions, 1480 flow, removed 24 selfloop flow, removed 0 redundant places. [2024-06-03 20:51:20,130 INFO L231 Difference]: Finished difference. Result has 117 places, 131 transitions, 1148 flow [2024-06-03 20:51:20,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1148, PETRI_PLACES=117, PETRI_TRANSITIONS=131} [2024-06-03 20:51:20,130 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 72 predicate places. [2024-06-03 20:51:20,130 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 131 transitions, 1148 flow [2024-06-03 20:51:20,131 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) [2024-06-03 20:51:20,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:20,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:20,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:51:20,131 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:20,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:20,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1894771334, now seen corresponding path program 1 times [2024-06-03 20:51:20,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:20,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693990496] [2024-06-03 20:51:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:20,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:20,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:20,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693990496] [2024-06-03 20:51:20,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693990496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:20,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:20,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:51:20,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974950633] [2024-06-03 20:51:20,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:20,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:51:20,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:20,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:51:20,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:51:20,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:20,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 131 transitions, 1148 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:20,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:20,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:20,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:20,788 INFO L124 PetriNetUnfolderBase]: 1214/2164 cut-off events. [2024-06-03 20:51:20,789 INFO L125 PetriNetUnfolderBase]: For 35977/35977 co-relation queries the response was YES. [2024-06-03 20:51:20,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10964 conditions, 2164 events. 1214/2164 cut-off events. For 35977/35977 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12735 event pairs, 356 based on Foata normal form. 2/2153 useless extension candidates. Maximal degree in co-relation 10911. Up to 1754 conditions per place. [2024-06-03 20:51:20,803 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 102 selfloop transitions, 27 changer transitions 0/154 dead transitions. [2024-06-03 20:51:20,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 154 transitions, 1550 flow [2024-06-03 20:51:20,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:20,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:20,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-03 20:51:20,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-06-03 20:51:20,805 INFO L175 Difference]: Start difference. First operand has 117 places, 131 transitions, 1148 flow. Second operand 6 states and 160 transitions. [2024-06-03 20:51:20,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 154 transitions, 1550 flow [2024-06-03 20:51:20,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 154 transitions, 1495 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-03 20:51:20,845 INFO L231 Difference]: Finished difference. Result has 121 places, 137 transitions, 1216 flow [2024-06-03 20:51:20,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1216, PETRI_PLACES=121, PETRI_TRANSITIONS=137} [2024-06-03 20:51:20,846 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-03 20:51:20,846 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 137 transitions, 1216 flow [2024-06-03 20:51:20,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:20,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:20,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:20,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:51:20,847 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:20,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:20,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1948925420, now seen corresponding path program 3 times [2024-06-03 20:51:20,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:20,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662146458] [2024-06-03 20:51:20,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:20,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:21,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:21,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662146458] [2024-06-03 20:51:21,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662146458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:21,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:21,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:51:21,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049926432] [2024-06-03 20:51:21,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:21,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:51:21,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:21,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:51:21,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:51:21,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:21,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 137 transitions, 1216 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) [2024-06-03 20:51:21,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:21,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:21,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:21,475 INFO L124 PetriNetUnfolderBase]: 1275/2219 cut-off events. [2024-06-03 20:51:21,475 INFO L125 PetriNetUnfolderBase]: For 38077/38077 co-relation queries the response was YES. [2024-06-03 20:51:21,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11548 conditions, 2219 events. 1275/2219 cut-off events. For 38077/38077 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12750 event pairs, 369 based on Foata normal form. 1/2213 useless extension candidates. Maximal degree in co-relation 11494. Up to 1894 conditions per place. [2024-06-03 20:51:21,489 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 109 selfloop transitions, 39 changer transitions 0/157 dead transitions. [2024-06-03 20:51:21,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 157 transitions, 1678 flow [2024-06-03 20:51:21,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:21,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:21,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-03 20:51:21,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946969696969697 [2024-06-03 20:51:21,491 INFO L175 Difference]: Start difference. First operand has 121 places, 137 transitions, 1216 flow. Second operand 6 states and 157 transitions. [2024-06-03 20:51:21,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 157 transitions, 1678 flow [2024-06-03 20:51:21,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 157 transitions, 1627 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-03 20:51:21,527 INFO L231 Difference]: Finished difference. Result has 125 places, 139 transitions, 1275 flow [2024-06-03 20:51:21,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1275, PETRI_PLACES=125, PETRI_TRANSITIONS=139} [2024-06-03 20:51:21,528 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2024-06-03 20:51:21,528 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 139 transitions, 1275 flow [2024-06-03 20:51:21,528 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) [2024-06-03 20:51:21,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:21,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:21,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:51:21,529 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:21,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:21,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1962257900, now seen corresponding path program 4 times [2024-06-03 20:51:21,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:21,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4425501] [2024-06-03 20:51:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:21,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:21,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:21,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4425501] [2024-06-03 20:51:21,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4425501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:21,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:21,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:51:21,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054777008] [2024-06-03 20:51:21,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:21,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:51:21,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:21,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:51:21,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:51:21,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:21,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 139 transitions, 1275 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) [2024-06-03 20:51:21,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:21,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:21,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:22,158 INFO L124 PetriNetUnfolderBase]: 1280/2228 cut-off events. [2024-06-03 20:51:22,158 INFO L125 PetriNetUnfolderBase]: For 40731/40731 co-relation queries the response was YES. [2024-06-03 20:51:22,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11761 conditions, 2228 events. 1280/2228 cut-off events. For 40731/40731 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12833 event pairs, 369 based on Foata normal form. 1/2222 useless extension candidates. Maximal degree in co-relation 11705. Up to 1900 conditions per place. [2024-06-03 20:51:22,173 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 105 selfloop transitions, 43 changer transitions 0/157 dead transitions. [2024-06-03 20:51:22,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 157 transitions, 1702 flow [2024-06-03 20:51:22,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:22,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:22,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-03 20:51:22,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-03 20:51:22,174 INFO L175 Difference]: Start difference. First operand has 125 places, 139 transitions, 1275 flow. Second operand 6 states and 153 transitions. [2024-06-03 20:51:22,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 157 transitions, 1702 flow [2024-06-03 20:51:22,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 157 transitions, 1652 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-03 20:51:22,228 INFO L231 Difference]: Finished difference. Result has 130 places, 143 transitions, 1364 flow [2024-06-03 20:51:22,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1364, PETRI_PLACES=130, PETRI_TRANSITIONS=143} [2024-06-03 20:51:22,229 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 85 predicate places. [2024-06-03 20:51:22,229 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 143 transitions, 1364 flow [2024-06-03 20:51:22,229 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) [2024-06-03 20:51:22,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:22,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:22,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:51:22,230 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:22,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:22,230 INFO L85 PathProgramCache]: Analyzing trace with hash 82263672, now seen corresponding path program 5 times [2024-06-03 20:51:22,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:22,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862416921] [2024-06-03 20:51:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:22,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:22,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:22,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862416921] [2024-06-03 20:51:22,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862416921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:22,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:22,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:51:22,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244436240] [2024-06-03 20:51:22,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:22,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:51:22,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:22,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:51:22,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:51:22,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:22,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 143 transitions, 1364 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) [2024-06-03 20:51:22,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:22,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:22,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:22,854 INFO L124 PetriNetUnfolderBase]: 1277/2219 cut-off events. [2024-06-03 20:51:22,855 INFO L125 PetriNetUnfolderBase]: For 43471/43471 co-relation queries the response was YES. [2024-06-03 20:51:22,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11827 conditions, 2219 events. 1277/2219 cut-off events. For 43471/43471 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12777 event pairs, 378 based on Foata normal form. 1/2211 useless extension candidates. Maximal degree in co-relation 11769. Up to 1897 conditions per place. [2024-06-03 20:51:22,869 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 102 selfloop transitions, 43 changer transitions 0/154 dead transitions. [2024-06-03 20:51:22,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 154 transitions, 1732 flow [2024-06-03 20:51:22,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:22,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:22,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-03 20:51:22,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-03 20:51:22,870 INFO L175 Difference]: Start difference. First operand has 130 places, 143 transitions, 1364 flow. Second operand 6 states and 150 transitions. [2024-06-03 20:51:22,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 154 transitions, 1732 flow [2024-06-03 20:51:22,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 154 transitions, 1668 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-03 20:51:22,925 INFO L231 Difference]: Finished difference. Result has 134 places, 143 transitions, 1392 flow [2024-06-03 20:51:22,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1392, PETRI_PLACES=134, PETRI_TRANSITIONS=143} [2024-06-03 20:51:22,926 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 89 predicate places. [2024-06-03 20:51:22,926 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 143 transitions, 1392 flow [2024-06-03 20:51:22,926 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) [2024-06-03 20:51:22,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:22,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:22,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:51:22,927 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:22,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:22,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1624656626, now seen corresponding path program 6 times [2024-06-03 20:51:22,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:22,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989105778] [2024-06-03 20:51:22,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:22,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:23,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:23,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989105778] [2024-06-03 20:51:23,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989105778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:23,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:23,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:51:23,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851930042] [2024-06-03 20:51:23,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:23,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:51:23,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:23,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:51:23,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:51:23,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:23,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 143 transitions, 1392 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) [2024-06-03 20:51:23,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:23,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:23,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:23,514 INFO L124 PetriNetUnfolderBase]: 1274/2215 cut-off events. [2024-06-03 20:51:23,515 INFO L125 PetriNetUnfolderBase]: For 45859/45859 co-relation queries the response was YES. [2024-06-03 20:51:23,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11884 conditions, 2215 events. 1274/2215 cut-off events. For 45859/45859 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12733 event pairs, 378 based on Foata normal form. 1/2207 useless extension candidates. Maximal degree in co-relation 11825. Up to 1894 conditions per place. [2024-06-03 20:51:23,529 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 101 selfloop transitions, 43 changer transitions 0/153 dead transitions. [2024-06-03 20:51:23,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 153 transitions, 1704 flow [2024-06-03 20:51:23,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:23,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 20:51:23,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-06-03 20:51:23,531 INFO L175 Difference]: Start difference. First operand has 134 places, 143 transitions, 1392 flow. Second operand 6 states and 149 transitions. [2024-06-03 20:51:23,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 153 transitions, 1704 flow [2024-06-03 20:51:23,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 153 transitions, 1630 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 20:51:23,586 INFO L231 Difference]: Finished difference. Result has 137 places, 143 transitions, 1410 flow [2024-06-03 20:51:23,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1318, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1410, PETRI_PLACES=137, PETRI_TRANSITIONS=143} [2024-06-03 20:51:23,587 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 92 predicate places. [2024-06-03 20:51:23,587 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 143 transitions, 1410 flow [2024-06-03 20:51:23,587 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) [2024-06-03 20:51:23,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:23,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:23,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:51:23,588 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:23,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:23,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1937384886, now seen corresponding path program 2 times [2024-06-03 20:51:23,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:23,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840829077] [2024-06-03 20:51:23,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:23,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:23,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:23,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840829077] [2024-06-03 20:51:23,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840829077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:23,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:23,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:51:23,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94067062] [2024-06-03 20:51:23,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:23,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:51:23,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:23,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:51:23,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:51:23,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:23,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 143 transitions, 1410 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:23,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:23,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:23,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:24,179 INFO L124 PetriNetUnfolderBase]: 1215/2157 cut-off events. [2024-06-03 20:51:24,179 INFO L125 PetriNetUnfolderBase]: For 49374/49374 co-relation queries the response was YES. [2024-06-03 20:51:24,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11643 conditions, 2157 events. 1215/2157 cut-off events. For 49374/49374 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12775 event pairs, 361 based on Foata normal form. 2/2141 useless extension candidates. Maximal degree in co-relation 11584. Up to 1756 conditions per place. [2024-06-03 20:51:24,194 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 99 selfloop transitions, 30 changer transitions 0/157 dead transitions. [2024-06-03 20:51:24,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 157 transitions, 1782 flow [2024-06-03 20:51:24,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:24,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:24,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-03 20:51:24,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 20:51:24,196 INFO L175 Difference]: Start difference. First operand has 137 places, 143 transitions, 1410 flow. Second operand 6 states and 154 transitions. [2024-06-03 20:51:24,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 157 transitions, 1782 flow [2024-06-03 20:51:24,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 157 transitions, 1712 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:51:24,236 INFO L231 Difference]: Finished difference. Result has 140 places, 146 transitions, 1439 flow [2024-06-03 20:51:24,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1439, PETRI_PLACES=140, PETRI_TRANSITIONS=146} [2024-06-03 20:51:24,236 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-03 20:51:24,237 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 146 transitions, 1439 flow [2024-06-03 20:51:24,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:24,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:24,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:24,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:51:24,237 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:24,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:24,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1952622006, now seen corresponding path program 3 times [2024-06-03 20:51:24,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:24,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725304189] [2024-06-03 20:51:24,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:24,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:24,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:24,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:24,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725304189] [2024-06-03 20:51:24,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725304189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:24,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:24,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:51:24,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131537091] [2024-06-03 20:51:24,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:24,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:51:24,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:24,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:51:24,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:51:24,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:24,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 146 transitions, 1439 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:24,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:24,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:24,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:24,861 INFO L124 PetriNetUnfolderBase]: 1209/2168 cut-off events. [2024-06-03 20:51:24,861 INFO L125 PetriNetUnfolderBase]: For 51321/51321 co-relation queries the response was YES. [2024-06-03 20:51:24,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11678 conditions, 2168 events. 1209/2168 cut-off events. For 51321/51321 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12856 event pairs, 353 based on Foata normal form. 2/2159 useless extension candidates. Maximal degree in co-relation 11618. Up to 1786 conditions per place. [2024-06-03 20:51:24,878 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 115 selfloop transitions, 13 changer transitions 0/156 dead transitions. [2024-06-03 20:51:24,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 156 transitions, 1719 flow [2024-06-03 20:51:24,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:24,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 20:51:24,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-06-03 20:51:24,879 INFO L175 Difference]: Start difference. First operand has 140 places, 146 transitions, 1439 flow. Second operand 6 states and 149 transitions. [2024-06-03 20:51:24,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 156 transitions, 1719 flow [2024-06-03 20:51:24,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 156 transitions, 1621 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-03 20:51:24,933 INFO L231 Difference]: Finished difference. Result has 142 places, 146 transitions, 1373 flow [2024-06-03 20:51:24,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1373, PETRI_PLACES=142, PETRI_TRANSITIONS=146} [2024-06-03 20:51:24,934 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 97 predicate places. [2024-06-03 20:51:24,934 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 146 transitions, 1373 flow [2024-06-03 20:51:24,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:24,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:24,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:24,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:51:24,935 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:24,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:24,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1957505228, now seen corresponding path program 1 times [2024-06-03 20:51:24,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:24,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625399535] [2024-06-03 20:51:24,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:24,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:25,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:25,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:25,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625399535] [2024-06-03 20:51:25,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625399535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:25,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:25,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:51:25,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113992351] [2024-06-03 20:51:25,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:25,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:51:25,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:25,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:51:25,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:51:25,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:25,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 146 transitions, 1373 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:25,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:25,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:25,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:25,559 INFO L124 PetriNetUnfolderBase]: 1214/2187 cut-off events. [2024-06-03 20:51:25,559 INFO L125 PetriNetUnfolderBase]: For 44591/44689 co-relation queries the response was YES. [2024-06-03 20:51:25,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11341 conditions, 2187 events. 1214/2187 cut-off events. For 44591/44689 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13008 event pairs, 312 based on Foata normal form. 1/2147 useless extension candidates. Maximal degree in co-relation 11280. Up to 1825 conditions per place. [2024-06-03 20:51:25,573 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 129 selfloop transitions, 13 changer transitions 0/165 dead transitions. [2024-06-03 20:51:25,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 165 transitions, 1727 flow [2024-06-03 20:51:25,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:25,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:25,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-03 20:51:25,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5871212121212122 [2024-06-03 20:51:25,575 INFO L175 Difference]: Start difference. First operand has 142 places, 146 transitions, 1373 flow. Second operand 6 states and 155 transitions. [2024-06-03 20:51:25,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 165 transitions, 1727 flow [2024-06-03 20:51:25,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 165 transitions, 1666 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:51:25,631 INFO L231 Difference]: Finished difference. Result has 141 places, 149 transitions, 1380 flow [2024-06-03 20:51:25,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1380, PETRI_PLACES=141, PETRI_TRANSITIONS=149} [2024-06-03 20:51:25,632 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-06-03 20:51:25,632 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 149 transitions, 1380 flow [2024-06-03 20:51:25,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:25,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:25,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:25,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:51:25,633 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:25,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:25,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1962266828, now seen corresponding path program 2 times [2024-06-03 20:51:25,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:25,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254309967] [2024-06-03 20:51:25,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:25,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:25,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:25,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254309967] [2024-06-03 20:51:25,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254309967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:25,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:25,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:51:25,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473589051] [2024-06-03 20:51:25,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:25,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:51:25,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:25,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:51:25,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:51:25,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:25,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 149 transitions, 1380 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:25,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:25,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:25,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:26,228 INFO L124 PetriNetUnfolderBase]: 1229/2210 cut-off events. [2024-06-03 20:51:26,228 INFO L125 PetriNetUnfolderBase]: For 47545/47691 co-relation queries the response was YES. [2024-06-03 20:51:26,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11765 conditions, 2210 events. 1229/2210 cut-off events. For 47545/47691 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13162 event pairs, 313 based on Foata normal form. 1/2168 useless extension candidates. Maximal degree in co-relation 11705. Up to 1821 conditions per place. [2024-06-03 20:51:26,243 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 116 selfloop transitions, 30 changer transitions 0/169 dead transitions. [2024-06-03 20:51:26,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 169 transitions, 1840 flow [2024-06-03 20:51:26,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:26,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:26,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-03 20:51:26,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946969696969697 [2024-06-03 20:51:26,244 INFO L175 Difference]: Start difference. First operand has 141 places, 149 transitions, 1380 flow. Second operand 6 states and 157 transitions. [2024-06-03 20:51:26,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 169 transitions, 1840 flow [2024-06-03 20:51:26,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 169 transitions, 1794 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 20:51:26,304 INFO L231 Difference]: Finished difference. Result has 143 places, 155 transitions, 1479 flow [2024-06-03 20:51:26,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1479, PETRI_PLACES=143, PETRI_TRANSITIONS=155} [2024-06-03 20:51:26,304 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 98 predicate places. [2024-06-03 20:51:26,305 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 155 transitions, 1479 flow [2024-06-03 20:51:26,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:26,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:26,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:26,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:51:26,305 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:26,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:26,306 INFO L85 PathProgramCache]: Analyzing trace with hash 88938840, now seen corresponding path program 3 times [2024-06-03 20:51:26,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:26,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084363555] [2024-06-03 20:51:26,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:26,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:26,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:26,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084363555] [2024-06-03 20:51:26,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084363555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:26,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:26,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:51:26,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151184269] [2024-06-03 20:51:26,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:26,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:51:26,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:26,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:51:26,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:51:26,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:26,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 155 transitions, 1479 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:26,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:26,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:26,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:26,894 INFO L124 PetriNetUnfolderBase]: 1221/2195 cut-off events. [2024-06-03 20:51:26,894 INFO L125 PetriNetUnfolderBase]: For 50621/50775 co-relation queries the response was YES. [2024-06-03 20:51:26,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11933 conditions, 2195 events. 1221/2195 cut-off events. For 50621/50775 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13062 event pairs, 320 based on Foata normal form. 2/2153 useless extension candidates. Maximal degree in co-relation 11872. Up to 1811 conditions per place. [2024-06-03 20:51:26,910 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 112 selfloop transitions, 30 changer transitions 0/165 dead transitions. [2024-06-03 20:51:26,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 165 transitions, 1787 flow [2024-06-03 20:51:26,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:26,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:26,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-03 20:51:26,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-03 20:51:26,911 INFO L175 Difference]: Start difference. First operand has 143 places, 155 transitions, 1479 flow. Second operand 6 states and 153 transitions. [2024-06-03 20:51:26,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 165 transitions, 1787 flow [2024-06-03 20:51:26,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 165 transitions, 1721 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-03 20:51:26,984 INFO L231 Difference]: Finished difference. Result has 147 places, 155 transitions, 1480 flow [2024-06-03 20:51:26,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1480, PETRI_PLACES=147, PETRI_TRANSITIONS=155} [2024-06-03 20:51:26,984 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 102 predicate places. [2024-06-03 20:51:26,984 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 155 transitions, 1480 flow [2024-06-03 20:51:26,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:26,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:26,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:26,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:51:26,985 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:26,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:26,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1952639862, now seen corresponding path program 1 times [2024-06-03 20:51:26,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:26,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441252441] [2024-06-03 20:51:26,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:26,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:27,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:27,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441252441] [2024-06-03 20:51:27,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441252441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:27,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:27,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:51:27,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407468333] [2024-06-03 20:51:27,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:27,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:51:27,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:27,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:51:27,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:51:27,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:27,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 155 transitions, 1480 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:27,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:27,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:27,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:27,612 INFO L124 PetriNetUnfolderBase]: 1218/2189 cut-off events. [2024-06-03 20:51:27,613 INFO L125 PetriNetUnfolderBase]: For 62043/62043 co-relation queries the response was YES. [2024-06-03 20:51:27,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12363 conditions, 2189 events. 1218/2189 cut-off events. For 62043/62043 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13011 event pairs, 350 based on Foata normal form. 2/2180 useless extension candidates. Maximal degree in co-relation 12300. Up to 1796 conditions per place. [2024-06-03 20:51:27,628 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 128 selfloop transitions, 12 changer transitions 0/168 dead transitions. [2024-06-03 20:51:27,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 168 transitions, 1816 flow [2024-06-03 20:51:27,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:27,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:27,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 20:51:27,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-06-03 20:51:27,629 INFO L175 Difference]: Start difference. First operand has 147 places, 155 transitions, 1480 flow. Second operand 6 states and 149 transitions. [2024-06-03 20:51:27,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 168 transitions, 1816 flow [2024-06-03 20:51:27,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 168 transitions, 1735 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 20:51:27,704 INFO L231 Difference]: Finished difference. Result has 148 places, 157 transitions, 1462 flow [2024-06-03 20:51:27,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1462, PETRI_PLACES=148, PETRI_TRANSITIONS=157} [2024-06-03 20:51:27,704 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 103 predicate places. [2024-06-03 20:51:27,704 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 157 transitions, 1462 flow [2024-06-03 20:51:27,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:27,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:27,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:27,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:51:27,705 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:27,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:27,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1672104650, now seen corresponding path program 1 times [2024-06-03 20:51:27,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:27,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470161148] [2024-06-03 20:51:27,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:27,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:28,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:28,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470161148] [2024-06-03 20:51:28,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470161148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:28,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:28,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:28,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094958471] [2024-06-03 20:51:28,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:28,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:28,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:28,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:28,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:28,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:28,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 157 transitions, 1462 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:28,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:28,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:28,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:28,501 INFO L124 PetriNetUnfolderBase]: 1410/2485 cut-off events. [2024-06-03 20:51:28,501 INFO L125 PetriNetUnfolderBase]: For 69663/69663 co-relation queries the response was YES. [2024-06-03 20:51:28,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13791 conditions, 2485 events. 1410/2485 cut-off events. For 69663/69663 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14854 event pairs, 349 based on Foata normal form. 12/2487 useless extension candidates. Maximal degree in co-relation 13727. Up to 1768 conditions per place. [2024-06-03 20:51:28,521 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 162 selfloop transitions, 47 changer transitions 0/218 dead transitions. [2024-06-03 20:51:28,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 218 transitions, 2144 flow [2024-06-03 20:51:28,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:51:28,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:51:28,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 285 transitions. [2024-06-03 20:51:28,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888429752066116 [2024-06-03 20:51:28,523 INFO L175 Difference]: Start difference. First operand has 148 places, 157 transitions, 1462 flow. Second operand 11 states and 285 transitions. [2024-06-03 20:51:28,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 218 transitions, 2144 flow [2024-06-03 20:51:28,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 218 transitions, 2097 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-03 20:51:28,666 INFO L231 Difference]: Finished difference. Result has 157 places, 165 transitions, 1635 flow [2024-06-03 20:51:28,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1635, PETRI_PLACES=157, PETRI_TRANSITIONS=165} [2024-06-03 20:51:28,667 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 112 predicate places. [2024-06-03 20:51:28,667 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 165 transitions, 1635 flow [2024-06-03 20:51:28,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:28,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:28,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:28,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:51:28,667 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:28,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:28,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1020588268, now seen corresponding path program 2 times [2024-06-03 20:51:28,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:28,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519451194] [2024-06-03 20:51:28,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:28,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:28,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:28,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:28,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519451194] [2024-06-03 20:51:28,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519451194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:28,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:28,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:28,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061126800] [2024-06-03 20:51:28,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:28,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:28,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:28,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:28,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:29,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:29,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 165 transitions, 1635 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:29,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:29,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:29,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:29,470 INFO L124 PetriNetUnfolderBase]: 1520/2704 cut-off events. [2024-06-03 20:51:29,470 INFO L125 PetriNetUnfolderBase]: For 76130/76130 co-relation queries the response was YES. [2024-06-03 20:51:29,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15191 conditions, 2704 events. 1520/2704 cut-off events. For 76130/76130 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 16665 event pairs, 382 based on Foata normal form. 12/2711 useless extension candidates. Maximal degree in co-relation 15124. Up to 2041 conditions per place. [2024-06-03 20:51:29,492 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 166 selfloop transitions, 49 changer transitions 0/224 dead transitions. [2024-06-03 20:51:29,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 224 transitions, 2308 flow [2024-06-03 20:51:29,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:51:29,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:51:29,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 305 transitions. [2024-06-03 20:51:29,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5776515151515151 [2024-06-03 20:51:29,494 INFO L175 Difference]: Start difference. First operand has 157 places, 165 transitions, 1635 flow. Second operand 12 states and 305 transitions. [2024-06-03 20:51:29,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 224 transitions, 2308 flow [2024-06-03 20:51:29,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 224 transitions, 2160 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-03 20:51:29,588 INFO L231 Difference]: Finished difference. Result has 163 places, 171 transitions, 1690 flow [2024-06-03 20:51:29,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1690, PETRI_PLACES=163, PETRI_TRANSITIONS=171} [2024-06-03 20:51:29,588 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 118 predicate places. [2024-06-03 20:51:29,589 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 171 transitions, 1690 flow [2024-06-03 20:51:29,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:29,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:29,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:29,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:51:29,589 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:29,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:29,590 INFO L85 PathProgramCache]: Analyzing trace with hash 818203338, now seen corresponding path program 3 times [2024-06-03 20:51:29,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:29,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328132944] [2024-06-03 20:51:29,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:29,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:29,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:29,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328132944] [2024-06-03 20:51:29,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328132944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:29,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:29,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:29,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944450242] [2024-06-03 20:51:29,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:29,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:29,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:29,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:29,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:29,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:29,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 171 transitions, 1690 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:29,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:29,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:29,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:30,570 INFO L124 PetriNetUnfolderBase]: 1602/2856 cut-off events. [2024-06-03 20:51:30,570 INFO L125 PetriNetUnfolderBase]: For 81420/81420 co-relation queries the response was YES. [2024-06-03 20:51:30,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16028 conditions, 2856 events. 1602/2856 cut-off events. For 81420/81420 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17840 event pairs, 407 based on Foata normal form. 12/2863 useless extension candidates. Maximal degree in co-relation 15958. Up to 2183 conditions per place. [2024-06-03 20:51:30,592 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 166 selfloop transitions, 53 changer transitions 0/228 dead transitions. [2024-06-03 20:51:30,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 228 transitions, 2358 flow [2024-06-03 20:51:30,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:51:30,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:51:30,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 302 transitions. [2024-06-03 20:51:30,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571969696969697 [2024-06-03 20:51:30,594 INFO L175 Difference]: Start difference. First operand has 163 places, 171 transitions, 1690 flow. Second operand 12 states and 302 transitions. [2024-06-03 20:51:30,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 228 transitions, 2358 flow [2024-06-03 20:51:30,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 228 transitions, 2234 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-03 20:51:30,734 INFO L231 Difference]: Finished difference. Result has 168 places, 175 transitions, 1756 flow [2024-06-03 20:51:30,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1570, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1756, PETRI_PLACES=168, PETRI_TRANSITIONS=175} [2024-06-03 20:51:30,734 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 123 predicate places. [2024-06-03 20:51:30,734 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 175 transitions, 1756 flow [2024-06-03 20:51:30,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:30,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:30,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:30,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:51:30,735 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:30,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:30,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1999723830, now seen corresponding path program 4 times [2024-06-03 20:51:30,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:30,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204752996] [2024-06-03 20:51:30,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:30,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:31,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:31,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204752996] [2024-06-03 20:51:31,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204752996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:31,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:31,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:31,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099396871] [2024-06-03 20:51:31,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:31,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:31,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:31,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:31,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:31,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:31,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 175 transitions, 1756 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:31,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:31,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:31,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:31,564 INFO L124 PetriNetUnfolderBase]: 1582/2816 cut-off events. [2024-06-03 20:51:31,565 INFO L125 PetriNetUnfolderBase]: For 79784/79784 co-relation queries the response was YES. [2024-06-03 20:51:31,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15556 conditions, 2816 events. 1582/2816 cut-off events. For 79784/79784 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17547 event pairs, 352 based on Foata normal form. 12/2823 useless extension candidates. Maximal degree in co-relation 15484. Up to 1591 conditions per place. [2024-06-03 20:51:31,585 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 152 selfloop transitions, 63 changer transitions 0/224 dead transitions. [2024-06-03 20:51:31,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 224 transitions, 2300 flow [2024-06-03 20:51:31,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:51:31,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:51:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 279 transitions. [2024-06-03 20:51:31,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5764462809917356 [2024-06-03 20:51:31,586 INFO L175 Difference]: Start difference. First operand has 168 places, 175 transitions, 1756 flow. Second operand 11 states and 279 transitions. [2024-06-03 20:51:31,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 224 transitions, 2300 flow [2024-06-03 20:51:31,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 224 transitions, 2189 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 20:51:31,727 INFO L231 Difference]: Finished difference. Result has 171 places, 174 transitions, 1735 flow [2024-06-03 20:51:31,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1735, PETRI_PLACES=171, PETRI_TRANSITIONS=174} [2024-06-03 20:51:31,727 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 126 predicate places. [2024-06-03 20:51:31,728 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 174 transitions, 1735 flow [2024-06-03 20:51:31,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:31,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:31,728 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] [2024-06-03 20:51:31,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:51:31,728 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:31,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:31,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1056590423, now seen corresponding path program 1 times [2024-06-03 20:51:31,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:31,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029482189] [2024-06-03 20:51:31,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:31,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:32,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:32,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029482189] [2024-06-03 20:51:32,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029482189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:32,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:32,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:32,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249352943] [2024-06-03 20:51:32,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:32,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:32,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:32,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:32,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:32,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:32,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 174 transitions, 1735 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) [2024-06-03 20:51:32,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:32,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:32,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:32,526 INFO L124 PetriNetUnfolderBase]: 1595/2840 cut-off events. [2024-06-03 20:51:32,526 INFO L125 PetriNetUnfolderBase]: For 78542/78542 co-relation queries the response was YES. [2024-06-03 20:51:32,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15774 conditions, 2840 events. 1595/2840 cut-off events. For 78542/78542 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17786 event pairs, 401 based on Foata normal form. 1/2838 useless extension candidates. Maximal degree in co-relation 15701. Up to 2431 conditions per place. [2024-06-03 20:51:32,547 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 152 selfloop transitions, 40 changer transitions 0/201 dead transitions. [2024-06-03 20:51:32,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 201 transitions, 2313 flow [2024-06-03 20:51:32,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:32,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:32,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-03 20:51:32,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-03 20:51:32,549 INFO L175 Difference]: Start difference. First operand has 171 places, 174 transitions, 1735 flow. Second operand 6 states and 159 transitions. [2024-06-03 20:51:32,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 201 transitions, 2313 flow [2024-06-03 20:51:32,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 201 transitions, 2142 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-03 20:51:32,699 INFO L231 Difference]: Finished difference. Result has 168 places, 181 transitions, 1751 flow [2024-06-03 20:51:32,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1751, PETRI_PLACES=168, PETRI_TRANSITIONS=181} [2024-06-03 20:51:32,700 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 123 predicate places. [2024-06-03 20:51:32,700 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 181 transitions, 1751 flow [2024-06-03 20:51:32,700 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) [2024-06-03 20:51:32,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:32,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:32,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:51:32,701 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:32,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:32,701 INFO L85 PathProgramCache]: Analyzing trace with hash -294291619, now seen corresponding path program 2 times [2024-06-03 20:51:32,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:32,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84626619] [2024-06-03 20:51:32,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:32,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:33,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:33,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:33,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84626619] [2024-06-03 20:51:33,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84626619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:33,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:33,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:33,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969925957] [2024-06-03 20:51:33,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:33,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:33,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:33,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:33,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:33,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:33,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 181 transitions, 1751 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) [2024-06-03 20:51:33,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:33,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:33,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:33,512 INFO L124 PetriNetUnfolderBase]: 1600/2859 cut-off events. [2024-06-03 20:51:33,512 INFO L125 PetriNetUnfolderBase]: For 80703/80703 co-relation queries the response was YES. [2024-06-03 20:51:33,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15789 conditions, 2859 events. 1600/2859 cut-off events. For 80703/80703 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17973 event pairs, 401 based on Foata normal form. 1/2857 useless extension candidates. Maximal degree in co-relation 15715. Up to 2437 conditions per place. [2024-06-03 20:51:33,533 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 152 selfloop transitions, 45 changer transitions 0/206 dead transitions. [2024-06-03 20:51:33,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 206 transitions, 2316 flow [2024-06-03 20:51:33,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:51:33,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:51:33,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-03 20:51:33,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710227272727273 [2024-06-03 20:51:33,535 INFO L175 Difference]: Start difference. First operand has 168 places, 181 transitions, 1751 flow. Second operand 8 states and 201 transitions. [2024-06-03 20:51:33,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 206 transitions, 2316 flow [2024-06-03 20:51:33,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 206 transitions, 2243 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-03 20:51:33,695 INFO L231 Difference]: Finished difference. Result has 173 places, 184 transitions, 1819 flow [2024-06-03 20:51:33,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1819, PETRI_PLACES=173, PETRI_TRANSITIONS=184} [2024-06-03 20:51:33,695 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 128 predicate places. [2024-06-03 20:51:33,696 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 184 transitions, 1819 flow [2024-06-03 20:51:33,696 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) [2024-06-03 20:51:33,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:33,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:33,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:51:33,696 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:33,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:33,697 INFO L85 PathProgramCache]: Analyzing trace with hash 2070794393, now seen corresponding path program 1 times [2024-06-03 20:51:33,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:33,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977205908] [2024-06-03 20:51:33,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:33,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:34,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:34,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977205908] [2024-06-03 20:51:34,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977205908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:34,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:34,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:34,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788982988] [2024-06-03 20:51:34,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:34,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:34,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:34,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:34,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:34,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:34,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 184 transitions, 1819 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) [2024-06-03 20:51:34,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:34,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:34,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:34,540 INFO L124 PetriNetUnfolderBase]: 1608/2871 cut-off events. [2024-06-03 20:51:34,540 INFO L125 PetriNetUnfolderBase]: For 81623/81623 co-relation queries the response was YES. [2024-06-03 20:51:34,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15924 conditions, 2871 events. 1608/2871 cut-off events. For 81623/81623 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17986 event pairs, 320 based on Foata normal form. 2/2870 useless extension candidates. Maximal degree in co-relation 15849. Up to 2437 conditions per place. [2024-06-03 20:51:34,563 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 176 selfloop transitions, 25 changer transitions 0/210 dead transitions. [2024-06-03 20:51:34,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 210 transitions, 2401 flow [2024-06-03 20:51:34,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:34,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-03 20:51:34,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946969696969697 [2024-06-03 20:51:34,565 INFO L175 Difference]: Start difference. First operand has 173 places, 184 transitions, 1819 flow. Second operand 6 states and 157 transitions. [2024-06-03 20:51:34,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 210 transitions, 2401 flow [2024-06-03 20:51:34,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 210 transitions, 2295 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 20:51:34,699 INFO L231 Difference]: Finished difference. Result has 172 places, 188 transitions, 1822 flow [2024-06-03 20:51:34,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1822, PETRI_PLACES=172, PETRI_TRANSITIONS=188} [2024-06-03 20:51:34,700 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 127 predicate places. [2024-06-03 20:51:34,700 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 188 transitions, 1822 flow [2024-06-03 20:51:34,700 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) [2024-06-03 20:51:34,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:34,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:34,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:51:34,701 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:34,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:34,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1727165001, now seen corresponding path program 2 times [2024-06-03 20:51:34,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:34,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625140858] [2024-06-03 20:51:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:34,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:35,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:35,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625140858] [2024-06-03 20:51:35,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625140858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:35,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:35,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:35,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847878650] [2024-06-03 20:51:35,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:35,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:35,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:35,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:35,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:35,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:35,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 188 transitions, 1822 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) [2024-06-03 20:51:35,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:35,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:35,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:35,534 INFO L124 PetriNetUnfolderBase]: 1616/2883 cut-off events. [2024-06-03 20:51:35,535 INFO L125 PetriNetUnfolderBase]: For 82032/82032 co-relation queries the response was YES. [2024-06-03 20:51:35,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16044 conditions, 2883 events. 1616/2883 cut-off events. For 82032/82032 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18085 event pairs, 399 based on Foata normal form. 2/2882 useless extension candidates. Maximal degree in co-relation 15969. Up to 2492 conditions per place. [2024-06-03 20:51:35,553 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 175 selfloop transitions, 23 changer transitions 0/207 dead transitions. [2024-06-03 20:51:35,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 207 transitions, 2288 flow [2024-06-03 20:51:35,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:35,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:35,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-03 20:51:35,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-03 20:51:35,554 INFO L175 Difference]: Start difference. First operand has 172 places, 188 transitions, 1822 flow. Second operand 6 states and 153 transitions. [2024-06-03 20:51:35,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 207 transitions, 2288 flow [2024-06-03 20:51:35,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 207 transitions, 2227 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-03 20:51:35,670 INFO L231 Difference]: Finished difference. Result has 176 places, 190 transitions, 1844 flow [2024-06-03 20:51:35,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1844, PETRI_PLACES=176, PETRI_TRANSITIONS=190} [2024-06-03 20:51:35,671 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 131 predicate places. [2024-06-03 20:51:35,671 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 190 transitions, 1844 flow [2024-06-03 20:51:35,671 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) [2024-06-03 20:51:35,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:35,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:35,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:51:35,671 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:35,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:35,672 INFO L85 PathProgramCache]: Analyzing trace with hash 820747637, now seen corresponding path program 3 times [2024-06-03 20:51:35,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:35,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505248694] [2024-06-03 20:51:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:35,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:36,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:36,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505248694] [2024-06-03 20:51:36,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505248694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:36,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:36,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:36,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260430629] [2024-06-03 20:51:36,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:36,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:36,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:36,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:36,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:36,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:36,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 190 transitions, 1844 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) [2024-06-03 20:51:36,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:36,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:36,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:36,529 INFO L124 PetriNetUnfolderBase]: 1629/2901 cut-off events. [2024-06-03 20:51:36,529 INFO L125 PetriNetUnfolderBase]: For 85601/85601 co-relation queries the response was YES. [2024-06-03 20:51:36,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16279 conditions, 2901 events. 1629/2901 cut-off events. For 85601/85601 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 18205 event pairs, 405 based on Foata normal form. 1/2896 useless extension candidates. Maximal degree in co-relation 16202. Up to 2407 conditions per place. [2024-06-03 20:51:36,553 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 152 selfloop transitions, 75 changer transitions 0/236 dead transitions. [2024-06-03 20:51:36,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 236 transitions, 2744 flow [2024-06-03 20:51:36,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:51:36,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:51:36,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-03 20:51:36,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959595959595959 [2024-06-03 20:51:36,555 INFO L175 Difference]: Start difference. First operand has 176 places, 190 transitions, 1844 flow. Second operand 9 states and 236 transitions. [2024-06-03 20:51:36,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 236 transitions, 2744 flow [2024-06-03 20:51:36,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 236 transitions, 2691 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:51:36,696 INFO L231 Difference]: Finished difference. Result has 181 places, 199 transitions, 2067 flow [2024-06-03 20:51:36,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1791, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2067, PETRI_PLACES=181, PETRI_TRANSITIONS=199} [2024-06-03 20:51:36,696 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 136 predicate places. [2024-06-03 20:51:36,696 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 199 transitions, 2067 flow [2024-06-03 20:51:36,697 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) [2024-06-03 20:51:36,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:36,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:36,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:51:36,697 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:36,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:36,697 INFO L85 PathProgramCache]: Analyzing trace with hash 832175477, now seen corresponding path program 4 times [2024-06-03 20:51:36,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:36,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051301905] [2024-06-03 20:51:36,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:36,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:36,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:37,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:37,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051301905] [2024-06-03 20:51:37,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051301905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:37,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:37,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:37,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569605269] [2024-06-03 20:51:37,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:37,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:37,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:37,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:37,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:37,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:37,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 199 transitions, 2067 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) [2024-06-03 20:51:37,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:37,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:37,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:37,513 INFO L124 PetriNetUnfolderBase]: 1634/2910 cut-off events. [2024-06-03 20:51:37,514 INFO L125 PetriNetUnfolderBase]: For 91149/91149 co-relation queries the response was YES. [2024-06-03 20:51:37,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16832 conditions, 2910 events. 1634/2910 cut-off events. For 91149/91149 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 18320 event pairs, 405 based on Foata normal form. 1/2905 useless extension candidates. Maximal degree in co-relation 16754. Up to 2413 conditions per place. [2024-06-03 20:51:37,539 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 147 selfloop transitions, 80 changer transitions 0/236 dead transitions. [2024-06-03 20:51:37,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 236 transitions, 2813 flow [2024-06-03 20:51:37,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:51:37,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:51:37,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-06-03 20:51:37,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5704545454545454 [2024-06-03 20:51:37,540 INFO L175 Difference]: Start difference. First operand has 181 places, 199 transitions, 2067 flow. Second operand 10 states and 251 transitions. [2024-06-03 20:51:37,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 236 transitions, 2813 flow [2024-06-03 20:51:37,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 236 transitions, 2595 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-03 20:51:37,676 INFO L231 Difference]: Finished difference. Result has 186 places, 202 transitions, 2059 flow [2024-06-03 20:51:37,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1873, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2059, PETRI_PLACES=186, PETRI_TRANSITIONS=202} [2024-06-03 20:51:37,676 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 141 predicate places. [2024-06-03 20:51:37,677 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 202 transitions, 2059 flow [2024-06-03 20:51:37,677 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) [2024-06-03 20:51:37,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:37,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:37,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:51:37,677 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:37,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:37,678 INFO L85 PathProgramCache]: Analyzing trace with hash 182334521, now seen corresponding path program 5 times [2024-06-03 20:51:37,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:37,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419731644] [2024-06-03 20:51:37,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:37,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:38,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:38,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419731644] [2024-06-03 20:51:38,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419731644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:38,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:38,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:38,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370374912] [2024-06-03 20:51:38,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:38,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:38,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:38,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:38,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:38,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:38,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 202 transitions, 2059 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) [2024-06-03 20:51:38,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:38,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:38,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:38,488 INFO L124 PetriNetUnfolderBase]: 1647/2932 cut-off events. [2024-06-03 20:51:38,488 INFO L125 PetriNetUnfolderBase]: For 93613/93613 co-relation queries the response was YES. [2024-06-03 20:51:38,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16680 conditions, 2932 events. 1647/2932 cut-off events. For 93613/93613 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18474 event pairs, 405 based on Foata normal form. 1/2927 useless extension candidates. Maximal degree in co-relation 16602. Up to 2428 conditions per place. [2024-06-03 20:51:38,512 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 141 selfloop transitions, 86 changer transitions 0/236 dead transitions. [2024-06-03 20:51:38,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 236 transitions, 2815 flow [2024-06-03 20:51:38,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:51:38,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:51:38,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-03 20:51:38,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-03 20:51:38,514 INFO L175 Difference]: Start difference. First operand has 186 places, 202 transitions, 2059 flow. Second operand 10 states and 245 transitions. [2024-06-03 20:51:38,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 236 transitions, 2815 flow [2024-06-03 20:51:38,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 236 transitions, 2671 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:51:38,646 INFO L231 Difference]: Finished difference. Result has 190 places, 208 transitions, 2159 flow [2024-06-03 20:51:38,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1924, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2159, PETRI_PLACES=190, PETRI_TRANSITIONS=208} [2024-06-03 20:51:38,646 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 145 predicate places. [2024-06-03 20:51:38,646 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 208 transitions, 2159 flow [2024-06-03 20:51:38,647 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) [2024-06-03 20:51:38,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:38,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:38,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:51:38,647 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:38,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:38,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1579574311, now seen corresponding path program 1 times [2024-06-03 20:51:38,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:38,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321290566] [2024-06-03 20:51:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:38,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:38,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:38,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321290566] [2024-06-03 20:51:38,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321290566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:38,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:38,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:51:38,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291453415] [2024-06-03 20:51:38,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:38,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:51:38,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:38,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:51:38,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:51:39,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:39,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 208 transitions, 2159 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) [2024-06-03 20:51:39,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:39,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:39,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:39,399 INFO L124 PetriNetUnfolderBase]: 1652/2940 cut-off events. [2024-06-03 20:51:39,399 INFO L125 PetriNetUnfolderBase]: For 97596/97596 co-relation queries the response was YES. [2024-06-03 20:51:39,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16834 conditions, 2940 events. 1652/2940 cut-off events. For 97596/97596 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18547 event pairs, 405 based on Foata normal form. 1/2935 useless extension candidates. Maximal degree in co-relation 16755. Up to 2514 conditions per place. [2024-06-03 20:51:39,422 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 197 selfloop transitions, 28 changer transitions 0/234 dead transitions. [2024-06-03 20:51:39,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 234 transitions, 2705 flow [2024-06-03 20:51:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:39,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:39,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-03 20:51:39,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811688311688312 [2024-06-03 20:51:39,424 INFO L175 Difference]: Start difference. First operand has 190 places, 208 transitions, 2159 flow. Second operand 7 states and 179 transitions. [2024-06-03 20:51:39,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 234 transitions, 2705 flow [2024-06-03 20:51:39,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 234 transitions, 2572 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 20:51:39,554 INFO L231 Difference]: Finished difference. Result has 191 places, 211 transitions, 2132 flow [2024-06-03 20:51:39,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2132, PETRI_PLACES=191, PETRI_TRANSITIONS=211} [2024-06-03 20:51:39,555 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 146 predicate places. [2024-06-03 20:51:39,555 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 211 transitions, 2132 flow [2024-06-03 20:51:39,555 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) [2024-06-03 20:51:39,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:39,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:39,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:51:39,556 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:39,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:39,556 INFO L85 PathProgramCache]: Analyzing trace with hash 832182421, now seen corresponding path program 2 times [2024-06-03 20:51:39,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:39,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003064076] [2024-06-03 20:51:39,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:39,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:39,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:39,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003064076] [2024-06-03 20:51:39,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003064076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:39,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:39,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:51:39,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084990813] [2024-06-03 20:51:39,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:39,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:51:39,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:39,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:51:39,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:51:39,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:39,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 211 transitions, 2132 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) [2024-06-03 20:51:39,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:39,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:39,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:40,294 INFO L124 PetriNetUnfolderBase]: 1665/2959 cut-off events. [2024-06-03 20:51:40,294 INFO L125 PetriNetUnfolderBase]: For 103013/103013 co-relation queries the response was YES. [2024-06-03 20:51:40,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17247 conditions, 2959 events. 1665/2959 cut-off events. For 103013/103013 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 18671 event pairs, 411 based on Foata normal form. 1/2951 useless extension candidates. Maximal degree in co-relation 17167. Up to 2463 conditions per place. [2024-06-03 20:51:40,316 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 179 selfloop transitions, 61 changer transitions 0/249 dead transitions. [2024-06-03 20:51:40,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 249 transitions, 3016 flow [2024-06-03 20:51:40,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:40,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:40,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-03 20:51:40,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5941558441558441 [2024-06-03 20:51:40,318 INFO L175 Difference]: Start difference. First operand has 191 places, 211 transitions, 2132 flow. Second operand 7 states and 183 transitions. [2024-06-03 20:51:40,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 249 transitions, 3016 flow [2024-06-03 20:51:40,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 249 transitions, 2932 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 20:51:40,466 INFO L231 Difference]: Finished difference. Result has 194 places, 227 transitions, 2386 flow [2024-06-03 20:51:40,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2048, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2386, PETRI_PLACES=194, PETRI_TRANSITIONS=227} [2024-06-03 20:51:40,467 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 149 predicate places. [2024-06-03 20:51:40,467 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 227 transitions, 2386 flow [2024-06-03 20:51:40,467 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) [2024-06-03 20:51:40,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:40,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:40,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:51:40,468 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:40,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:40,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1928940935, now seen corresponding path program 1 times [2024-06-03 20:51:40,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:40,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940855736] [2024-06-03 20:51:40,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:40,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:40,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:40,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940855736] [2024-06-03 20:51:40,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940855736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:40,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:40,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:51:40,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18321662] [2024-06-03 20:51:40,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:40,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:51:40,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:40,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:51:40,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:51:40,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:40,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 227 transitions, 2386 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) [2024-06-03 20:51:40,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:40,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:40,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:41,287 INFO L124 PetriNetUnfolderBase]: 1678/2983 cut-off events. [2024-06-03 20:51:41,288 INFO L125 PetriNetUnfolderBase]: For 109832/109832 co-relation queries the response was YES. [2024-06-03 20:51:41,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17861 conditions, 2983 events. 1678/2983 cut-off events. For 109832/109832 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 18841 event pairs, 406 based on Foata normal form. 1/2976 useless extension candidates. Maximal degree in co-relation 17779. Up to 2509 conditions per place. [2024-06-03 20:51:41,310 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 199 selfloop transitions, 56 changer transitions 0/264 dead transitions. [2024-06-03 20:51:41,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 264 transitions, 3286 flow [2024-06-03 20:51:41,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:41,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-03 20:51:41,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-03 20:51:41,311 INFO L175 Difference]: Start difference. First operand has 194 places, 227 transitions, 2386 flow. Second operand 7 states and 182 transitions. [2024-06-03 20:51:41,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 264 transitions, 3286 flow [2024-06-03 20:51:41,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 264 transitions, 3226 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-06-03 20:51:41,513 INFO L231 Difference]: Finished difference. Result has 201 places, 242 transitions, 2649 flow [2024-06-03 20:51:41,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2326, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2649, PETRI_PLACES=201, PETRI_TRANSITIONS=242} [2024-06-03 20:51:41,514 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 156 predicate places. [2024-06-03 20:51:41,514 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 242 transitions, 2649 flow [2024-06-03 20:51:41,514 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) [2024-06-03 20:51:41,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:41,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:41,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:51:41,515 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:41,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:41,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1756457989, now seen corresponding path program 3 times [2024-06-03 20:51:41,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:41,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838841128] [2024-06-03 20:51:41,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:41,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:41,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:41,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838841128] [2024-06-03 20:51:41,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838841128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:41,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:41,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:51:41,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132457940] [2024-06-03 20:51:41,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:41,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:51:41,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:41,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:51:41,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:51:41,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:41,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 242 transitions, 2649 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) [2024-06-03 20:51:41,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:41,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:41,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:42,277 INFO L124 PetriNetUnfolderBase]: 1691/3003 cut-off events. [2024-06-03 20:51:42,277 INFO L125 PetriNetUnfolderBase]: For 116682/116682 co-relation queries the response was YES. [2024-06-03 20:51:42,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18501 conditions, 3003 events. 1691/3003 cut-off events. For 116682/116682 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 18986 event pairs, 410 based on Foata normal form. 1/2995 useless extension candidates. Maximal degree in co-relation 18415. Up to 2496 conditions per place. [2024-06-03 20:51:42,305 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 189 selfloop transitions, 69 changer transitions 0/267 dead transitions. [2024-06-03 20:51:42,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 267 transitions, 3483 flow [2024-06-03 20:51:42,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:42,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-03 20:51:42,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811688311688312 [2024-06-03 20:51:42,307 INFO L175 Difference]: Start difference. First operand has 201 places, 242 transitions, 2649 flow. Second operand 7 states and 179 transitions. [2024-06-03 20:51:42,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 267 transitions, 3483 flow [2024-06-03 20:51:42,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 267 transitions, 3402 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-03 20:51:42,700 INFO L231 Difference]: Finished difference. Result has 206 places, 248 transitions, 2800 flow [2024-06-03 20:51:42,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2568, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2800, PETRI_PLACES=206, PETRI_TRANSITIONS=248} [2024-06-03 20:51:42,701 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 161 predicate places. [2024-06-03 20:51:42,701 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 248 transitions, 2800 flow [2024-06-03 20:51:42,701 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) [2024-06-03 20:51:42,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:42,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:42,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:51:42,702 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:42,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:42,702 INFO L85 PathProgramCache]: Analyzing trace with hash 515789497, now seen corresponding path program 2 times [2024-06-03 20:51:42,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:42,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295309586] [2024-06-03 20:51:42,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:42,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:43,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:43,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295309586] [2024-06-03 20:51:43,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295309586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:43,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:43,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:51:43,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357969418] [2024-06-03 20:51:43,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:43,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:51:43,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:43,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:51:43,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:51:43,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:43,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 248 transitions, 2800 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) [2024-06-03 20:51:43,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:43,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:43,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:43,522 INFO L124 PetriNetUnfolderBase]: 1712/3040 cut-off events. [2024-06-03 20:51:43,522 INFO L125 PetriNetUnfolderBase]: For 123701/123701 co-relation queries the response was YES. [2024-06-03 20:51:43,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19003 conditions, 3040 events. 1712/3040 cut-off events. For 123701/123701 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19264 event pairs, 406 based on Foata normal form. 1/3033 useless extension candidates. Maximal degree in co-relation 18915. Up to 2551 conditions per place. [2024-06-03 20:51:43,552 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 205 selfloop transitions, 63 changer transitions 0/277 dead transitions. [2024-06-03 20:51:43,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 277 transitions, 3775 flow [2024-06-03 20:51:43,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:43,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:43,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-03 20:51:43,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-03 20:51:43,553 INFO L175 Difference]: Start difference. First operand has 206 places, 248 transitions, 2800 flow. Second operand 7 states and 181 transitions. [2024-06-03 20:51:43,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 277 transitions, 3775 flow [2024-06-03 20:51:43,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 277 transitions, 3665 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-03 20:51:43,872 INFO L231 Difference]: Finished difference. Result has 210 places, 257 transitions, 2931 flow [2024-06-03 20:51:43,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2690, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2931, PETRI_PLACES=210, PETRI_TRANSITIONS=257} [2024-06-03 20:51:43,872 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 165 predicate places. [2024-06-03 20:51:43,872 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 257 transitions, 2931 flow [2024-06-03 20:51:43,873 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) [2024-06-03 20:51:43,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:43,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:43,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:51:43,873 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:43,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:43,873 INFO L85 PathProgramCache]: Analyzing trace with hash 190919289, now seen corresponding path program 3 times [2024-06-03 20:51:43,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:43,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563480692] [2024-06-03 20:51:43,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:43,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:44,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:44,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563480692] [2024-06-03 20:51:44,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563480692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:44,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:44,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:51:44,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894138665] [2024-06-03 20:51:44,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:44,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:51:44,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:44,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:51:44,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:51:44,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:44,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 257 transitions, 2931 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) [2024-06-03 20:51:44,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:44,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:44,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:44,633 INFO L124 PetriNetUnfolderBase]: 1709/3036 cut-off events. [2024-06-03 20:51:44,633 INFO L125 PetriNetUnfolderBase]: For 127333/127333 co-relation queries the response was YES. [2024-06-03 20:51:44,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19015 conditions, 3036 events. 1709/3036 cut-off events. For 127333/127333 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19211 event pairs, 406 based on Foata normal form. 1/3029 useless extension candidates. Maximal degree in co-relation 18926. Up to 2548 conditions per place. [2024-06-03 20:51:44,660 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 202 selfloop transitions, 65 changer transitions 0/276 dead transitions. [2024-06-03 20:51:44,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 276 transitions, 3703 flow [2024-06-03 20:51:44,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:44,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:44,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-03 20:51:44,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811688311688312 [2024-06-03 20:51:44,662 INFO L175 Difference]: Start difference. First operand has 210 places, 257 transitions, 2931 flow. Second operand 7 states and 179 transitions. [2024-06-03 20:51:44,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 276 transitions, 3703 flow [2024-06-03 20:51:45,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 276 transitions, 3597 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-03 20:51:45,013 INFO L231 Difference]: Finished difference. Result has 215 places, 257 transitions, 2961 flow [2024-06-03 20:51:45,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2825, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2961, PETRI_PLACES=215, PETRI_TRANSITIONS=257} [2024-06-03 20:51:45,013 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-03 20:51:45,013 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 257 transitions, 2961 flow [2024-06-03 20:51:45,013 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) [2024-06-03 20:51:45,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:45,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:45,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:51:45,014 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:45,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:45,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1342906795, now seen corresponding path program 1 times [2024-06-03 20:51:45,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:45,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916544152] [2024-06-03 20:51:45,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:45,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:45,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:45,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916544152] [2024-06-03 20:51:45,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916544152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:45,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:45,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:51:45,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063351072] [2024-06-03 20:51:45,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:45,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:51:45,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:45,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:51:45,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:51:45,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:51:45,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 257 transitions, 2961 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:45,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:45,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:51:45,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:45,835 INFO L124 PetriNetUnfolderBase]: 1651/2973 cut-off events. [2024-06-03 20:51:45,839 INFO L125 PetriNetUnfolderBase]: For 143187/143187 co-relation queries the response was YES. [2024-06-03 20:51:45,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18893 conditions, 2973 events. 1651/2973 cut-off events. For 143187/143187 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19049 event pairs, 382 based on Foata normal form. 10/2958 useless extension candidates. Maximal degree in co-relation 18803. Up to 2392 conditions per place. [2024-06-03 20:51:45,869 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 202 selfloop transitions, 37 changer transitions 0/279 dead transitions. [2024-06-03 20:51:45,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 279 transitions, 3531 flow [2024-06-03 20:51:45,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:45,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:45,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-03 20:51:45,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-03 20:51:45,893 INFO L175 Difference]: Start difference. First operand has 215 places, 257 transitions, 2961 flow. Second operand 7 states and 181 transitions. [2024-06-03 20:51:45,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 279 transitions, 3531 flow [2024-06-03 20:51:46,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 279 transitions, 3396 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-03 20:51:46,257 INFO L231 Difference]: Finished difference. Result has 217 places, 258 transitions, 2926 flow [2024-06-03 20:51:46,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2826, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2926, PETRI_PLACES=217, PETRI_TRANSITIONS=258} [2024-06-03 20:51:46,257 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 172 predicate places. [2024-06-03 20:51:46,257 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 258 transitions, 2926 flow [2024-06-03 20:51:46,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:46,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:46,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:46,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:51:46,258 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:46,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:46,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2055800121, now seen corresponding path program 6 times [2024-06-03 20:51:46,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:46,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066760550] [2024-06-03 20:51:46,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:46,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:46,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:46,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066760550] [2024-06-03 20:51:46,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066760550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:46,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:46,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:46,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137806915] [2024-06-03 20:51:46,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:46,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:46,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:46,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:46,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:46,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:46,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 258 transitions, 2926 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) [2024-06-03 20:51:46,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:46,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:46,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:47,118 INFO L124 PetriNetUnfolderBase]: 1750/3101 cut-off events. [2024-06-03 20:51:47,118 INFO L125 PetriNetUnfolderBase]: For 137813/137813 co-relation queries the response was YES. [2024-06-03 20:51:47,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19574 conditions, 3101 events. 1750/3101 cut-off events. For 137813/137813 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 19710 event pairs, 410 based on Foata normal form. 1/3095 useless extension candidates. Maximal degree in co-relation 19483. Up to 2576 conditions per place. [2024-06-03 20:51:47,146 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 198 selfloop transitions, 87 changer transitions 0/294 dead transitions. [2024-06-03 20:51:47,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 294 transitions, 3811 flow [2024-06-03 20:51:47,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:51:47,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:51:47,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-03 20:51:47,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 20:51:47,147 INFO L175 Difference]: Start difference. First operand has 217 places, 258 transitions, 2926 flow. Second operand 9 states and 231 transitions. [2024-06-03 20:51:47,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 294 transitions, 3811 flow [2024-06-03 20:51:47,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 294 transitions, 3733 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 20:51:47,457 INFO L231 Difference]: Finished difference. Result has 221 places, 261 transitions, 3061 flow [2024-06-03 20:51:47,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2848, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3061, PETRI_PLACES=221, PETRI_TRANSITIONS=261} [2024-06-03 20:51:47,458 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 176 predicate places. [2024-06-03 20:51:47,458 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 261 transitions, 3061 flow [2024-06-03 20:51:47,458 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) [2024-06-03 20:51:47,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:47,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:47,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:51:47,459 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:47,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:47,459 INFO L85 PathProgramCache]: Analyzing trace with hash 2056186071, now seen corresponding path program 7 times [2024-06-03 20:51:47,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:47,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372423611] [2024-06-03 20:51:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:47,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:47,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:47,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:47,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372423611] [2024-06-03 20:51:47,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372423611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:47,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:47,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:47,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824722521] [2024-06-03 20:51:47,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:47,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:47,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:47,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:47,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:47,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:47,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 261 transitions, 3061 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) [2024-06-03 20:51:47,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:47,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:47,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:48,338 INFO L124 PetriNetUnfolderBase]: 1747/3097 cut-off events. [2024-06-03 20:51:48,338 INFO L125 PetriNetUnfolderBase]: For 141265/141265 co-relation queries the response was YES. [2024-06-03 20:51:48,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19657 conditions, 3097 events. 1747/3097 cut-off events. For 141265/141265 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 19710 event pairs, 410 based on Foata normal form. 1/3091 useless extension candidates. Maximal degree in co-relation 19565. Up to 2573 conditions per place. [2024-06-03 20:51:48,366 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 199 selfloop transitions, 88 changer transitions 0/296 dead transitions. [2024-06-03 20:51:48,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 296 transitions, 3925 flow [2024-06-03 20:51:48,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:51:48,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:51:48,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 271 transitions. [2024-06-03 20:51:48,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5599173553719008 [2024-06-03 20:51:48,368 INFO L175 Difference]: Start difference. First operand has 221 places, 261 transitions, 3061 flow. Second operand 11 states and 271 transitions. [2024-06-03 20:51:48,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 296 transitions, 3925 flow [2024-06-03 20:51:48,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 296 transitions, 3670 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-03 20:51:48,630 INFO L231 Difference]: Finished difference. Result has 225 places, 261 transitions, 2988 flow [2024-06-03 20:51:48,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2806, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2988, PETRI_PLACES=225, PETRI_TRANSITIONS=261} [2024-06-03 20:51:48,630 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 180 predicate places. [2024-06-03 20:51:48,630 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 261 transitions, 2988 flow [2024-06-03 20:51:48,630 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) [2024-06-03 20:51:48,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:48,631 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] [2024-06-03 20:51:48,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:51:48,631 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:48,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:48,631 INFO L85 PathProgramCache]: Analyzing trace with hash 2103437903, now seen corresponding path program 8 times [2024-06-03 20:51:48,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:48,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570567883] [2024-06-03 20:51:48,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:48,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:48,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:48,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570567883] [2024-06-03 20:51:48,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570567883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:48,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:48,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:48,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494405184] [2024-06-03 20:51:48,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:48,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:48,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:48,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:48,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:49,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:49,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 261 transitions, 2988 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) [2024-06-03 20:51:49,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:49,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:49,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:49,499 INFO L124 PetriNetUnfolderBase]: 1752/3106 cut-off events. [2024-06-03 20:51:49,499 INFO L125 PetriNetUnfolderBase]: For 145827/145827 co-relation queries the response was YES. [2024-06-03 20:51:49,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19651 conditions, 3106 events. 1752/3106 cut-off events. For 145827/145827 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 19735 event pairs, 410 based on Foata normal form. 1/3100 useless extension candidates. Maximal degree in co-relation 19559. Up to 2579 conditions per place. [2024-06-03 20:51:49,527 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 189 selfloop transitions, 93 changer transitions 0/291 dead transitions. [2024-06-03 20:51:49,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 291 transitions, 3751 flow [2024-06-03 20:51:49,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:51:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:51:49,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-03 20:51:49,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5522727272727272 [2024-06-03 20:51:49,529 INFO L175 Difference]: Start difference. First operand has 225 places, 261 transitions, 2988 flow. Second operand 10 states and 243 transitions. [2024-06-03 20:51:49,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 291 transitions, 3751 flow [2024-06-03 20:51:49,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 291 transitions, 3569 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-03 20:51:49,919 INFO L231 Difference]: Finished difference. Result has 226 places, 264 transitions, 3027 flow [2024-06-03 20:51:49,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2812, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3027, PETRI_PLACES=226, PETRI_TRANSITIONS=264} [2024-06-03 20:51:49,920 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-03 20:51:49,920 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 264 transitions, 3027 flow [2024-06-03 20:51:49,920 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) [2024-06-03 20:51:49,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:49,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:49,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:51:49,921 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:49,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:49,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1741368633, now seen corresponding path program 9 times [2024-06-03 20:51:49,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:49,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498037058] [2024-06-03 20:51:49,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:49,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:50,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:50,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498037058] [2024-06-03 20:51:50,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498037058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:50,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:50,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:50,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650517596] [2024-06-03 20:51:50,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:50,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:50,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:50,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:50,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:50,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:50,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 264 transitions, 3027 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) [2024-06-03 20:51:50,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:50,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:50,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:50,773 INFO L124 PetriNetUnfolderBase]: 1749/3097 cut-off events. [2024-06-03 20:51:50,774 INFO L125 PetriNetUnfolderBase]: For 149593/149593 co-relation queries the response was YES. [2024-06-03 20:51:50,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19676 conditions, 3097 events. 1749/3097 cut-off events. For 149593/149593 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 19725 event pairs, 419 based on Foata normal form. 1/3089 useless extension candidates. Maximal degree in co-relation 19583. Up to 2576 conditions per place. [2024-06-03 20:51:50,809 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 186 selfloop transitions, 92 changer transitions 0/287 dead transitions. [2024-06-03 20:51:50,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 287 transitions, 3849 flow [2024-06-03 20:51:50,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:51:50,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:51:50,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-06-03 20:51:50,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351239669421488 [2024-06-03 20:51:50,812 INFO L175 Difference]: Start difference. First operand has 226 places, 264 transitions, 3027 flow. Second operand 11 states and 259 transitions. [2024-06-03 20:51:50,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 287 transitions, 3849 flow [2024-06-03 20:51:51,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 287 transitions, 3687 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 20:51:51,177 INFO L231 Difference]: Finished difference. Result has 230 places, 264 transitions, 3055 flow [2024-06-03 20:51:51,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2865, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3055, PETRI_PLACES=230, PETRI_TRANSITIONS=264} [2024-06-03 20:51:51,177 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 185 predicate places. [2024-06-03 20:51:51,178 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 264 transitions, 3055 flow [2024-06-03 20:51:51,178 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) [2024-06-03 20:51:51,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:51,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:51,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:51:51,178 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:51,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:51,179 INFO L85 PathProgramCache]: Analyzing trace with hash 2092727669, now seen corresponding path program 10 times [2024-06-03 20:51:51,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:51,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540829706] [2024-06-03 20:51:51,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:51,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:51,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:51,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540829706] [2024-06-03 20:51:51,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540829706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:51,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:51,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:51,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795489698] [2024-06-03 20:51:51,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:51,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:51,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:51,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:51,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:51,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:51,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 264 transitions, 3055 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) [2024-06-03 20:51:51,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:51,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:51,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:52,078 INFO L124 PetriNetUnfolderBase]: 1746/3095 cut-off events. [2024-06-03 20:51:52,078 INFO L125 PetriNetUnfolderBase]: For 152824/152824 co-relation queries the response was YES. [2024-06-03 20:51:52,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19709 conditions, 3095 events. 1746/3095 cut-off events. For 152824/152824 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 19701 event pairs, 414 based on Foata normal form. 1/3088 useless extension candidates. Maximal degree in co-relation 19615. Up to 2679 conditions per place. [2024-06-03 20:51:52,110 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 238 selfloop transitions, 27 changer transitions 0/274 dead transitions. [2024-06-03 20:51:52,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 274 transitions, 3609 flow [2024-06-03 20:51:52,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:52,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:52,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 20:51:52,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-06-03 20:51:52,111 INFO L175 Difference]: Start difference. First operand has 230 places, 264 transitions, 3055 flow. Second operand 6 states and 149 transitions. [2024-06-03 20:51:52,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 274 transitions, 3609 flow [2024-06-03 20:51:52,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 274 transitions, 3365 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-03 20:51:52,522 INFO L231 Difference]: Finished difference. Result has 226 places, 264 transitions, 2875 flow [2024-06-03 20:51:52,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2811, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2875, PETRI_PLACES=226, PETRI_TRANSITIONS=264} [2024-06-03 20:51:52,523 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-03 20:51:52,523 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 264 transitions, 2875 flow [2024-06-03 20:51:52,524 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) [2024-06-03 20:51:52,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:52,524 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] [2024-06-03 20:51:52,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:51:52,524 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:52,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:52,524 INFO L85 PathProgramCache]: Analyzing trace with hash -86188683, now seen corresponding path program 11 times [2024-06-03 20:51:52,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:52,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280049809] [2024-06-03 20:51:52,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:52,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:52,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:52,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280049809] [2024-06-03 20:51:52,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280049809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:52,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:52,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:52,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956736417] [2024-06-03 20:51:52,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:52,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:52,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:52,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:52,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:52,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:52,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 264 transitions, 2875 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) [2024-06-03 20:51:52,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:52,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:52,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:53,400 INFO L124 PetriNetUnfolderBase]: 1743/3089 cut-off events. [2024-06-03 20:51:53,400 INFO L125 PetriNetUnfolderBase]: For 155544/155544 co-relation queries the response was YES. [2024-06-03 20:51:53,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19503 conditions, 3089 events. 1743/3089 cut-off events. For 155544/155544 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 19646 event pairs, 419 based on Foata normal form. 1/3081 useless extension candidates. Maximal degree in co-relation 19409. Up to 2570 conditions per place. [2024-06-03 20:51:53,426 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 182 selfloop transitions, 93 changer transitions 0/284 dead transitions. [2024-06-03 20:51:53,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 284 transitions, 3473 flow [2024-06-03 20:51:53,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:51:53,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:51:53,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-03 20:51:53,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-06-03 20:51:53,428 INFO L175 Difference]: Start difference. First operand has 226 places, 264 transitions, 2875 flow. Second operand 10 states and 236 transitions. [2024-06-03 20:51:53,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 284 transitions, 3473 flow [2024-06-03 20:51:53,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 284 transitions, 3409 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 20:51:53,780 INFO L231 Difference]: Finished difference. Result has 230 places, 264 transitions, 3003 flow [2024-06-03 20:51:53,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2811, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3003, PETRI_PLACES=230, PETRI_TRANSITIONS=264} [2024-06-03 20:51:53,780 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 185 predicate places. [2024-06-03 20:51:53,780 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 264 transitions, 3003 flow [2024-06-03 20:51:53,780 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) [2024-06-03 20:51:53,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:53,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:53,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 20:51:53,781 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:53,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:53,781 INFO L85 PathProgramCache]: Analyzing trace with hash 2092724693, now seen corresponding path program 3 times [2024-06-03 20:51:53,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:53,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466412344] [2024-06-03 20:51:53,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:53,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:54,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:54,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466412344] [2024-06-03 20:51:54,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466412344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:54,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:54,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:54,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731758059] [2024-06-03 20:51:54,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:54,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:54,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:54,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:54,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:54,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:54,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 264 transitions, 3003 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) [2024-06-03 20:51:54,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:54,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:54,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:54,586 INFO L124 PetriNetUnfolderBase]: 1738/3084 cut-off events. [2024-06-03 20:51:54,587 INFO L125 PetriNetUnfolderBase]: For 154322/154322 co-relation queries the response was YES. [2024-06-03 20:51:54,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19521 conditions, 3084 events. 1738/3084 cut-off events. For 154322/154322 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 19619 event pairs, 413 based on Foata normal form. 2/3078 useless extension candidates. Maximal degree in co-relation 19427. Up to 2668 conditions per place. [2024-06-03 20:51:54,615 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 243 selfloop transitions, 23 changer transitions 0/275 dead transitions. [2024-06-03 20:51:54,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 275 transitions, 3561 flow [2024-06-03 20:51:54,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:51:54,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:51:54,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 20:51:54,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-06-03 20:51:54,616 INFO L175 Difference]: Start difference. First operand has 230 places, 264 transitions, 3003 flow. Second operand 6 states and 148 transitions. [2024-06-03 20:51:54,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 275 transitions, 3561 flow [2024-06-03 20:51:54,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 275 transitions, 3372 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 20:51:54,984 INFO L231 Difference]: Finished difference. Result has 228 places, 264 transitions, 2865 flow [2024-06-03 20:51:54,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2814, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2865, PETRI_PLACES=228, PETRI_TRANSITIONS=264} [2024-06-03 20:51:54,985 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 183 predicate places. [2024-06-03 20:51:54,985 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 264 transitions, 2865 flow [2024-06-03 20:51:54,985 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) [2024-06-03 20:51:54,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:54,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:54,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 20:51:54,986 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:54,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:54,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1743050603, now seen corresponding path program 4 times [2024-06-03 20:51:54,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:54,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513430590] [2024-06-03 20:51:54,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:54,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:54,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:55,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:55,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513430590] [2024-06-03 20:51:55,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513430590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:55,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:55,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:51:55,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202647376] [2024-06-03 20:51:55,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:55,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:51:55,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:55,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:51:55,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:51:55,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:55,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 264 transitions, 2865 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) [2024-06-03 20:51:55,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:55,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:55,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:55,767 INFO L124 PetriNetUnfolderBase]: 1743/3098 cut-off events. [2024-06-03 20:51:55,768 INFO L125 PetriNetUnfolderBase]: For 157099/157099 co-relation queries the response was YES. [2024-06-03 20:51:55,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19486 conditions, 3098 events. 1743/3098 cut-off events. For 157099/157099 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 19742 event pairs, 406 based on Foata normal form. 1/3094 useless extension candidates. Maximal degree in co-relation 19391. Up to 2647 conditions per place. [2024-06-03 20:51:55,797 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 250 selfloop transitions, 28 changer transitions 0/287 dead transitions. [2024-06-03 20:51:55,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 287 transitions, 3514 flow [2024-06-03 20:51:55,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:55,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:55,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 20:51:55,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:51:55,798 INFO L175 Difference]: Start difference. First operand has 228 places, 264 transitions, 2865 flow. Second operand 7 states and 176 transitions. [2024-06-03 20:51:55,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 287 transitions, 3514 flow [2024-06-03 20:51:56,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 287 transitions, 3456 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 20:51:56,127 INFO L231 Difference]: Finished difference. Result has 230 places, 267 transitions, 2918 flow [2024-06-03 20:51:56,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2918, PETRI_PLACES=230, PETRI_TRANSITIONS=267} [2024-06-03 20:51:56,128 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 185 predicate places. [2024-06-03 20:51:56,128 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 267 transitions, 2918 flow [2024-06-03 20:51:56,128 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) [2024-06-03 20:51:56,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:56,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:56,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 20:51:56,128 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:56,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:56,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1738289003, now seen corresponding path program 5 times [2024-06-03 20:51:56,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:56,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108163155] [2024-06-03 20:51:56,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:56,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:56,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:56,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:56,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108163155] [2024-06-03 20:51:56,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108163155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:56,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:56,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:51:56,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501425928] [2024-06-03 20:51:56,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:56,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:51:56,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:56,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:51:56,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:51:56,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:56,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 267 transitions, 2918 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) [2024-06-03 20:51:56,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:56,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:56,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:56,901 INFO L124 PetriNetUnfolderBase]: 1748/3105 cut-off events. [2024-06-03 20:51:56,901 INFO L125 PetriNetUnfolderBase]: For 162528/162528 co-relation queries the response was YES. [2024-06-03 20:51:56,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19661 conditions, 3105 events. 1748/3105 cut-off events. For 162528/162528 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19812 event pairs, 409 based on Foata normal form. 1/3099 useless extension candidates. Maximal degree in co-relation 19565. Up to 2580 conditions per place. [2024-06-03 20:51:56,932 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 207 selfloop transitions, 74 changer transitions 0/290 dead transitions. [2024-06-03 20:51:56,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 290 transitions, 3919 flow [2024-06-03 20:51:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:56,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:56,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-03 20:51:56,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2024-06-03 20:51:56,937 INFO L175 Difference]: Start difference. First operand has 230 places, 267 transitions, 2918 flow. Second operand 7 states and 180 transitions. [2024-06-03 20:51:56,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 290 transitions, 3919 flow [2024-06-03 20:51:57,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 290 transitions, 3839 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 20:51:57,355 INFO L231 Difference]: Finished difference. Result has 232 places, 270 transitions, 3041 flow [2024-06-03 20:51:57,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2838, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3041, PETRI_PLACES=232, PETRI_TRANSITIONS=270} [2024-06-03 20:51:57,355 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 187 predicate places. [2024-06-03 20:51:57,355 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 270 transitions, 3041 flow [2024-06-03 20:51:57,355 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) [2024-06-03 20:51:57,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:57,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:57,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 20:51:57,356 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:57,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:57,356 INFO L85 PathProgramCache]: Analyzing trace with hash 850006173, now seen corresponding path program 6 times [2024-06-03 20:51:57,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:57,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766675493] [2024-06-03 20:51:57,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:57,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:57,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:57,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766675493] [2024-06-03 20:51:57,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766675493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:57,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:57,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:51:57,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166439005] [2024-06-03 20:51:57,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:57,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:51:57,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:57,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:51:57,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:51:57,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:57,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 270 transitions, 3041 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) [2024-06-03 20:51:57,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:57,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:57,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:58,230 INFO L124 PetriNetUnfolderBase]: 1753/3116 cut-off events. [2024-06-03 20:51:58,231 INFO L125 PetriNetUnfolderBase]: For 167971/167971 co-relation queries the response was YES. [2024-06-03 20:51:58,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19896 conditions, 3116 events. 1753/3116 cut-off events. For 167971/167971 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 19888 event pairs, 406 based on Foata normal form. 1/3112 useless extension candidates. Maximal degree in co-relation 19799. Up to 2648 conditions per place. [2024-06-03 20:51:58,259 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 247 selfloop transitions, 41 changer transitions 0/297 dead transitions. [2024-06-03 20:51:58,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 297 transitions, 3859 flow [2024-06-03 20:51:58,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:51:58,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:51:58,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-03 20:51:58,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547979797979798 [2024-06-03 20:51:58,261 INFO L175 Difference]: Start difference. First operand has 232 places, 270 transitions, 3041 flow. Second operand 9 states and 217 transitions. [2024-06-03 20:51:58,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 297 transitions, 3859 flow [2024-06-03 20:51:58,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 297 transitions, 3642 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-03 20:51:58,768 INFO L231 Difference]: Finished difference. Result has 239 places, 274 transitions, 3006 flow [2024-06-03 20:51:58,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2839, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3006, PETRI_PLACES=239, PETRI_TRANSITIONS=274} [2024-06-03 20:51:58,768 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 194 predicate places. [2024-06-03 20:51:58,768 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 274 transitions, 3006 flow [2024-06-03 20:51:58,769 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) [2024-06-03 20:51:58,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:58,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:58,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 20:51:58,769 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:58,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:58,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1512974183, now seen corresponding path program 7 times [2024-06-03 20:51:58,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:58,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405488571] [2024-06-03 20:51:58,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:58,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:59,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:59,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:59,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405488571] [2024-06-03 20:51:59,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405488571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:59,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:59,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:51:59,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568200502] [2024-06-03 20:51:59,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:59,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:51:59,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:59,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:51:59,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:51:59,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:51:59,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 274 transitions, 3006 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) [2024-06-03 20:51:59,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:59,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:51:59,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:59,601 INFO L124 PetriNetUnfolderBase]: 1750/3112 cut-off events. [2024-06-03 20:51:59,602 INFO L125 PetriNetUnfolderBase]: For 170778/170778 co-relation queries the response was YES. [2024-06-03 20:51:59,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19788 conditions, 3112 events. 1750/3112 cut-off events. For 170778/170778 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 19886 event pairs, 406 based on Foata normal form. 1/3108 useless extension candidates. Maximal degree in co-relation 19688. Up to 2645 conditions per place. [2024-06-03 20:51:59,633 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 242 selfloop transitions, 40 changer transitions 0/291 dead transitions. [2024-06-03 20:51:59,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 291 transitions, 3612 flow [2024-06-03 20:51:59,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:59,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:59,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 20:51:59,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-03 20:51:59,635 INFO L175 Difference]: Start difference. First operand has 239 places, 274 transitions, 3006 flow. Second operand 7 states and 173 transitions. [2024-06-03 20:51:59,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 291 transitions, 3612 flow [2024-06-03 20:51:59,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 291 transitions, 3492 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-03 20:51:59,997 INFO L231 Difference]: Finished difference. Result has 240 places, 274 transitions, 2972 flow [2024-06-03 20:51:59,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2886, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2972, PETRI_PLACES=240, PETRI_TRANSITIONS=274} [2024-06-03 20:51:59,998 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 195 predicate places. [2024-06-03 20:51:59,998 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 274 transitions, 2972 flow [2024-06-03 20:51:59,998 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) [2024-06-03 20:51:59,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:59,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:59,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 20:51:59,998 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:59,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:59,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1967745865, now seen corresponding path program 8 times [2024-06-03 20:51:59,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:59,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777160435] [2024-06-03 20:51:59,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:59,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:00,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:00,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:00,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777160435] [2024-06-03 20:52:00,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777160435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:00,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:00,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:00,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606628098] [2024-06-03 20:52:00,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:00,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:00,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:00,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:00,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:00,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:00,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 274 transitions, 2972 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) [2024-06-03 20:52:00,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:00,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:00,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:00,774 INFO L124 PetriNetUnfolderBase]: 1763/3132 cut-off events. [2024-06-03 20:52:00,775 INFO L125 PetriNetUnfolderBase]: For 178070/178070 co-relation queries the response was YES. [2024-06-03 20:52:00,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20038 conditions, 3132 events. 1763/3132 cut-off events. For 178070/178070 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20067 event pairs, 409 based on Foata normal form. 1/3126 useless extension candidates. Maximal degree in co-relation 19937. Up to 2598 conditions per place. [2024-06-03 20:52:00,805 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 202 selfloop transitions, 86 changer transitions 0/297 dead transitions. [2024-06-03 20:52:00,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 297 transitions, 3940 flow [2024-06-03 20:52:00,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:00,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:00,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 20:52:00,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:52:00,807 INFO L175 Difference]: Start difference. First operand has 240 places, 274 transitions, 2972 flow. Second operand 7 states and 176 transitions. [2024-06-03 20:52:00,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 297 transitions, 3940 flow [2024-06-03 20:52:01,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 297 transitions, 3860 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 20:52:01,348 INFO L231 Difference]: Finished difference. Result has 241 places, 281 transitions, 3184 flow [2024-06-03 20:52:01,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2892, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3184, PETRI_PLACES=241, PETRI_TRANSITIONS=281} [2024-06-03 20:52:01,349 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 196 predicate places. [2024-06-03 20:52:01,349 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 281 transitions, 3184 flow [2024-06-03 20:52:01,349 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) [2024-06-03 20:52:01,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:01,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:01,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 20:52:01,350 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:01,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:01,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1365603593, now seen corresponding path program 9 times [2024-06-03 20:52:01,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:01,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664435396] [2024-06-03 20:52:01,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:01,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:01,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:01,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664435396] [2024-06-03 20:52:01,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664435396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:01,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:01,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:01,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373143151] [2024-06-03 20:52:01,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:01,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:01,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:01,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:01,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:01,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:01,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 281 transitions, 3184 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) [2024-06-03 20:52:01,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:01,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:01,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:02,157 INFO L124 PetriNetUnfolderBase]: 1760/3128 cut-off events. [2024-06-03 20:52:02,157 INFO L125 PetriNetUnfolderBase]: For 181937/181937 co-relation queries the response was YES. [2024-06-03 20:52:02,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20132 conditions, 3128 events. 1760/3128 cut-off events. For 181937/181937 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 19993 event pairs, 409 based on Foata normal form. 1/3122 useless extension candidates. Maximal degree in co-relation 20030. Up to 2595 conditions per place. [2024-06-03 20:52:02,185 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 202 selfloop transitions, 85 changer transitions 0/296 dead transitions. [2024-06-03 20:52:02,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 296 transitions, 3916 flow [2024-06-03 20:52:02,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:02,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-03 20:52:02,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-03 20:52:02,186 INFO L175 Difference]: Start difference. First operand has 241 places, 281 transitions, 3184 flow. Second operand 7 states and 175 transitions. [2024-06-03 20:52:02,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 296 transitions, 3916 flow [2024-06-03 20:52:02,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 296 transitions, 3701 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-03 20:52:02,779 INFO L231 Difference]: Finished difference. Result has 243 places, 281 transitions, 3145 flow [2024-06-03 20:52:02,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2969, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3145, PETRI_PLACES=243, PETRI_TRANSITIONS=281} [2024-06-03 20:52:02,779 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-03 20:52:02,780 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 281 transitions, 3145 flow [2024-06-03 20:52:02,780 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) [2024-06-03 20:52:02,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:02,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:02,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 20:52:02,780 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:02,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:02,781 INFO L85 PathProgramCache]: Analyzing trace with hash 311634251, now seen corresponding path program 4 times [2024-06-03 20:52:02,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:02,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104607266] [2024-06-03 20:52:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:02,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:03,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:03,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104607266] [2024-06-03 20:52:03,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104607266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:03,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:03,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:03,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816008660] [2024-06-03 20:52:03,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:03,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:03,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:03,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:03,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:03,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:03,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 281 transitions, 3145 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) [2024-06-03 20:52:03,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:03,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:03,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:03,533 INFO L124 PetriNetUnfolderBase]: 1757/3122 cut-off events. [2024-06-03 20:52:03,534 INFO L125 PetriNetUnfolderBase]: For 185522/185522 co-relation queries the response was YES. [2024-06-03 20:52:03,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20050 conditions, 3122 events. 1757/3122 cut-off events. For 185522/185522 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 19954 event pairs, 413 based on Foata normal form. 1/3114 useless extension candidates. Maximal degree in co-relation 19949. Up to 2623 conditions per place. [2024-06-03 20:52:03,564 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 226 selfloop transitions, 67 changer transitions 0/302 dead transitions. [2024-06-03 20:52:03,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 302 transitions, 4060 flow [2024-06-03 20:52:03,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:03,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:03,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-03 20:52:03,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811688311688312 [2024-06-03 20:52:03,566 INFO L175 Difference]: Start difference. First operand has 243 places, 281 transitions, 3145 flow. Second operand 7 states and 179 transitions. [2024-06-03 20:52:03,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 302 transitions, 4060 flow [2024-06-03 20:52:03,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 302 transitions, 3908 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 20:52:03,990 INFO L231 Difference]: Finished difference. Result has 246 places, 283 transitions, 3168 flow [2024-06-03 20:52:03,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3001, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3168, PETRI_PLACES=246, PETRI_TRANSITIONS=283} [2024-06-03 20:52:03,990 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-03 20:52:03,991 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 283 transitions, 3168 flow [2024-06-03 20:52:03,991 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) [2024-06-03 20:52:03,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:03,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:03,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 20:52:03,991 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:03,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:03,992 INFO L85 PathProgramCache]: Analyzing trace with hash -536065479, now seen corresponding path program 5 times [2024-06-03 20:52:03,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:03,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198666484] [2024-06-03 20:52:03,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:03,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:04,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:04,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198666484] [2024-06-03 20:52:04,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198666484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:04,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:04,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:04,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364385066] [2024-06-03 20:52:04,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:04,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:04,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:04,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:04,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:04,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:04,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 283 transitions, 3168 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) [2024-06-03 20:52:04,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:04,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:04,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:04,864 INFO L124 PetriNetUnfolderBase]: 1770/3144 cut-off events. [2024-06-03 20:52:04,865 INFO L125 PetriNetUnfolderBase]: For 192988/192988 co-relation queries the response was YES. [2024-06-03 20:52:04,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20309 conditions, 3144 events. 1770/3144 cut-off events. For 192988/192988 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20120 event pairs, 413 based on Foata normal form. 1/3136 useless extension candidates. Maximal degree in co-relation 20207. Up to 2638 conditions per place. [2024-06-03 20:52:04,894 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 224 selfloop transitions, 72 changer transitions 0/305 dead transitions. [2024-06-03 20:52:04,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 305 transitions, 4150 flow [2024-06-03 20:52:04,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:04,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:04,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-03 20:52:04,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5746753246753247 [2024-06-03 20:52:04,896 INFO L175 Difference]: Start difference. First operand has 246 places, 283 transitions, 3168 flow. Second operand 7 states and 177 transitions. [2024-06-03 20:52:04,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 305 transitions, 4150 flow [2024-06-03 20:52:05,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 305 transitions, 4032 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-03 20:52:05,364 INFO L231 Difference]: Finished difference. Result has 250 places, 289 transitions, 3300 flow [2024-06-03 20:52:05,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3060, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3300, PETRI_PLACES=250, PETRI_TRANSITIONS=289} [2024-06-03 20:52:05,365 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 205 predicate places. [2024-06-03 20:52:05,365 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 289 transitions, 3300 flow [2024-06-03 20:52:05,365 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) [2024-06-03 20:52:05,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:05,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:05,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 20:52:05,365 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:05,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:05,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1795433547, now seen corresponding path program 6 times [2024-06-03 20:52:05,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:05,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989206639] [2024-06-03 20:52:05,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:05,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:05,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:05,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989206639] [2024-06-03 20:52:05,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989206639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:05,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:05,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:05,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380671217] [2024-06-03 20:52:05,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:05,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:05,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:05,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:05,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:05,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:05,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 289 transitions, 3300 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) [2024-06-03 20:52:05,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:05,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:05,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:06,224 INFO L124 PetriNetUnfolderBase]: 1767/3147 cut-off events. [2024-06-03 20:52:06,224 INFO L125 PetriNetUnfolderBase]: For 196576/196576 co-relation queries the response was YES. [2024-06-03 20:52:06,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20302 conditions, 3147 events. 1767/3147 cut-off events. For 196576/196576 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20129 event pairs, 401 based on Foata normal form. 1/3144 useless extension candidates. Maximal degree in co-relation 20198. Up to 2730 conditions per place. [2024-06-03 20:52:06,251 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 269 selfloop transitions, 25 changer transitions 0/303 dead transitions. [2024-06-03 20:52:06,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 303 transitions, 3922 flow [2024-06-03 20:52:06,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:06,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:06,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:52:06,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2024-06-03 20:52:06,253 INFO L175 Difference]: Start difference. First operand has 250 places, 289 transitions, 3300 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:52:06,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 303 transitions, 3922 flow [2024-06-03 20:52:06,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 303 transitions, 3788 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-03 20:52:06,731 INFO L231 Difference]: Finished difference. Result has 254 places, 289 transitions, 3222 flow [2024-06-03 20:52:06,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3166, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3222, PETRI_PLACES=254, PETRI_TRANSITIONS=289} [2024-06-03 20:52:06,732 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 209 predicate places. [2024-06-03 20:52:06,732 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 289 transitions, 3222 flow [2024-06-03 20:52:06,732 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) [2024-06-03 20:52:06,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:06,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:06,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 20:52:06,733 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:06,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:06,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1746017207, now seen corresponding path program 10 times [2024-06-03 20:52:06,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:06,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815959507] [2024-06-03 20:52:06,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:06,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:07,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:07,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815959507] [2024-06-03 20:52:07,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815959507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:07,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:07,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:07,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057064934] [2024-06-03 20:52:07,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:07,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:07,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:07,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:07,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:07,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:07,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 289 transitions, 3222 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) [2024-06-03 20:52:07,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:07,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:07,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:07,531 INFO L124 PetriNetUnfolderBase]: 1764/3127 cut-off events. [2024-06-03 20:52:07,531 INFO L125 PetriNetUnfolderBase]: For 200444/200444 co-relation queries the response was YES. [2024-06-03 20:52:07,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20164 conditions, 3127 events. 1764/3127 cut-off events. For 200444/200444 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20044 event pairs, 434 based on Foata normal form. 1/3115 useless extension candidates. Maximal degree in co-relation 20059. Up to 2602 conditions per place. [2024-06-03 20:52:07,563 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 206 selfloop transitions, 86 changer transitions 0/301 dead transitions. [2024-06-03 20:52:07,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 301 transitions, 3964 flow [2024-06-03 20:52:07,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:07,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:07,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-03 20:52:07,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-03 20:52:07,565 INFO L175 Difference]: Start difference. First operand has 254 places, 289 transitions, 3222 flow. Second operand 7 states and 172 transitions. [2024-06-03 20:52:07,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 301 transitions, 3964 flow [2024-06-03 20:52:08,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 301 transitions, 3848 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 20:52:08,127 INFO L231 Difference]: Finished difference. Result has 254 places, 289 transitions, 3284 flow [2024-06-03 20:52:08,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3106, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3284, PETRI_PLACES=254, PETRI_TRANSITIONS=289} [2024-06-03 20:52:08,128 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 209 predicate places. [2024-06-03 20:52:08,128 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 289 transitions, 3284 flow [2024-06-03 20:52:08,128 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) [2024-06-03 20:52:08,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:08,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:08,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 20:52:08,128 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:08,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:08,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2023224797, now seen corresponding path program 11 times [2024-06-03 20:52:08,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:08,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51702778] [2024-06-03 20:52:08,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:08,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:08,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:08,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51702778] [2024-06-03 20:52:08,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51702778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:08,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:08,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:08,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787580982] [2024-06-03 20:52:08,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:08,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:08,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:08,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:08,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:08,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:08,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 289 transitions, 3284 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) [2024-06-03 20:52:08,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:08,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:08,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:08,909 INFO L124 PetriNetUnfolderBase]: 1769/3136 cut-off events. [2024-06-03 20:52:08,909 INFO L125 PetriNetUnfolderBase]: For 206495/206495 co-relation queries the response was YES. [2024-06-03 20:52:08,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20407 conditions, 3136 events. 1769/3136 cut-off events. For 206495/206495 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20112 event pairs, 434 based on Foata normal form. 1/3124 useless extension candidates. Maximal degree in co-relation 20301. Up to 2608 conditions per place. [2024-06-03 20:52:08,941 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 208 selfloop transitions, 87 changer transitions 0/304 dead transitions. [2024-06-03 20:52:08,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 304 transitions, 4088 flow [2024-06-03 20:52:08,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:08,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:08,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 20:52:08,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-03 20:52:08,942 INFO L175 Difference]: Start difference. First operand has 254 places, 289 transitions, 3284 flow. Second operand 7 states and 173 transitions. [2024-06-03 20:52:08,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 304 transitions, 4088 flow [2024-06-03 20:52:09,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 304 transitions, 3898 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 20:52:09,515 INFO L231 Difference]: Finished difference. Result has 256 places, 292 transitions, 3328 flow [2024-06-03 20:52:09,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3106, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3328, PETRI_PLACES=256, PETRI_TRANSITIONS=292} [2024-06-03 20:52:09,516 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 211 predicate places. [2024-06-03 20:52:09,516 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 292 transitions, 3328 flow [2024-06-03 20:52:09,516 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) [2024-06-03 20:52:09,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:09,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:09,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 20:52:09,516 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:09,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:09,517 INFO L85 PathProgramCache]: Analyzing trace with hash -85942729, now seen corresponding path program 12 times [2024-06-03 20:52:09,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:09,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549938520] [2024-06-03 20:52:09,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:09,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:09,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:09,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549938520] [2024-06-03 20:52:09,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549938520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:09,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:09,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:09,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981952775] [2024-06-03 20:52:09,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:09,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:09,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:09,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:09,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:09,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:09,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 292 transitions, 3328 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) [2024-06-03 20:52:09,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:09,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:09,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:10,383 INFO L124 PetriNetUnfolderBase]: 1766/3132 cut-off events. [2024-06-03 20:52:10,383 INFO L125 PetriNetUnfolderBase]: For 209332/209332 co-relation queries the response was YES. [2024-06-03 20:52:10,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20366 conditions, 3132 events. 1766/3132 cut-off events. For 209332/209332 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20121 event pairs, 434 based on Foata normal form. 1/3120 useless extension candidates. Maximal degree in co-relation 20259. Up to 2605 conditions per place. [2024-06-03 20:52:10,421 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 205 selfloop transitions, 89 changer transitions 0/303 dead transitions. [2024-06-03 20:52:10,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 303 transitions, 3942 flow [2024-06-03 20:52:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:10,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:52:10,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5551948051948052 [2024-06-03 20:52:10,422 INFO L175 Difference]: Start difference. First operand has 256 places, 292 transitions, 3328 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:52:10,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 303 transitions, 3942 flow [2024-06-03 20:52:11,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 303 transitions, 3652 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-03 20:52:11,165 INFO L231 Difference]: Finished difference. Result has 257 places, 292 transitions, 3222 flow [2024-06-03 20:52:11,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3038, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3222, PETRI_PLACES=257, PETRI_TRANSITIONS=292} [2024-06-03 20:52:11,165 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 212 predicate places. [2024-06-03 20:52:11,165 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 292 transitions, 3222 flow [2024-06-03 20:52:11,166 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) [2024-06-03 20:52:11,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:11,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:11,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 20:52:11,166 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:11,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:11,166 INFO L85 PathProgramCache]: Analyzing trace with hash -86174795, now seen corresponding path program 7 times [2024-06-03 20:52:11,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:11,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194905204] [2024-06-03 20:52:11,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:11,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:11,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:11,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194905204] [2024-06-03 20:52:11,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194905204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:11,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:11,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:11,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738887729] [2024-06-03 20:52:11,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:11,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:11,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:11,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:11,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:11,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:11,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 292 transitions, 3222 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) [2024-06-03 20:52:11,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:11,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:11,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:11,939 INFO L124 PetriNetUnfolderBase]: 1771/3147 cut-off events. [2024-06-03 20:52:11,939 INFO L125 PetriNetUnfolderBase]: For 214160/214160 co-relation queries the response was YES. [2024-06-03 20:52:11,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20441 conditions, 3147 events. 1771/3147 cut-off events. For 214160/214160 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 20217 event pairs, 418 based on Foata normal form. 1/3139 useless extension candidates. Maximal degree in co-relation 20333. Up to 2640 conditions per place. [2024-06-03 20:52:11,970 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 224 selfloop transitions, 75 changer transitions 0/308 dead transitions. [2024-06-03 20:52:11,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 308 transitions, 4170 flow [2024-06-03 20:52:11,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:11,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:11,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 20:52:11,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-03 20:52:11,972 INFO L175 Difference]: Start difference. First operand has 257 places, 292 transitions, 3222 flow. Second operand 7 states and 173 transitions. [2024-06-03 20:52:11,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 308 transitions, 4170 flow [2024-06-03 20:52:12,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 308 transitions, 3994 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 20:52:12,716 INFO L231 Difference]: Finished difference. Result has 259 places, 295 transitions, 3250 flow [2024-06-03 20:52:12,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3046, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3250, PETRI_PLACES=259, PETRI_TRANSITIONS=295} [2024-06-03 20:52:12,716 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 214 predicate places. [2024-06-03 20:52:12,717 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 295 transitions, 3250 flow [2024-06-03 20:52:12,717 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) [2024-06-03 20:52:12,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:12,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:12,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 20:52:12,717 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:12,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:12,718 INFO L85 PathProgramCache]: Analyzing trace with hash -70937675, now seen corresponding path program 8 times [2024-06-03 20:52:12,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:12,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89774675] [2024-06-03 20:52:12,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:12,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:13,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:13,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89774675] [2024-06-03 20:52:13,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89774675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:13,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:13,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:13,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290331146] [2024-06-03 20:52:13,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:13,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:13,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:13,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:13,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:13,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:13,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 295 transitions, 3250 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) [2024-06-03 20:52:13,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:13,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:13,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:13,555 INFO L124 PetriNetUnfolderBase]: 1781/3174 cut-off events. [2024-06-03 20:52:13,555 INFO L125 PetriNetUnfolderBase]: For 219716/219716 co-relation queries the response was YES. [2024-06-03 20:52:13,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20617 conditions, 3174 events. 1781/3174 cut-off events. For 219716/219716 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 20391 event pairs, 403 based on Foata normal form. 1/3171 useless extension candidates. Maximal degree in co-relation 20508. Up to 2749 conditions per place. [2024-06-03 20:52:13,589 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 275 selfloop transitions, 28 changer transitions 0/312 dead transitions. [2024-06-03 20:52:13,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 312 transitions, 3973 flow [2024-06-03 20:52:13,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:13,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:13,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-03 20:52:13,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2024-06-03 20:52:13,590 INFO L175 Difference]: Start difference. First operand has 259 places, 295 transitions, 3250 flow. Second operand 7 states and 167 transitions. [2024-06-03 20:52:13,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 312 transitions, 3973 flow [2024-06-03 20:52:14,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 312 transitions, 3786 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-03 20:52:14,261 INFO L231 Difference]: Finished difference. Result has 262 places, 301 transitions, 3222 flow [2024-06-03 20:52:14,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3081, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3222, PETRI_PLACES=262, PETRI_TRANSITIONS=301} [2024-06-03 20:52:14,261 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 217 predicate places. [2024-06-03 20:52:14,261 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 301 transitions, 3222 flow [2024-06-03 20:52:14,261 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) [2024-06-03 20:52:14,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:14,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:14,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 20:52:14,262 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:14,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:14,262 INFO L85 PathProgramCache]: Analyzing trace with hash 2106074037, now seen corresponding path program 9 times [2024-06-03 20:52:14,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:14,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835222427] [2024-06-03 20:52:14,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:14,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:14,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:14,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835222427] [2024-06-03 20:52:14,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835222427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:14,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:14,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:14,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479659716] [2024-06-03 20:52:14,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:14,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:14,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:14,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:14,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:14,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:14,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 301 transitions, 3222 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) [2024-06-03 20:52:14,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:14,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:14,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:15,077 INFO L124 PetriNetUnfolderBase]: 1794/3187 cut-off events. [2024-06-03 20:52:15,078 INFO L125 PetriNetUnfolderBase]: For 227666/227666 co-relation queries the response was YES. [2024-06-03 20:52:15,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20712 conditions, 3187 events. 1794/3187 cut-off events. For 227666/227666 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20503 event pairs, 418 based on Foata normal form. 1/3179 useless extension candidates. Maximal degree in co-relation 20602. Up to 2665 conditions per place. [2024-06-03 20:52:15,109 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 223 selfloop transitions, 89 changer transitions 0/321 dead transitions. [2024-06-03 20:52:15,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 321 transitions, 4244 flow [2024-06-03 20:52:15,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:15,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 20:52:15,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-03 20:52:15,111 INFO L175 Difference]: Start difference. First operand has 262 places, 301 transitions, 3222 flow. Second operand 7 states and 173 transitions. [2024-06-03 20:52:15,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 321 transitions, 4244 flow [2024-06-03 20:52:15,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 321 transitions, 4170 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 20:52:15,899 INFO L231 Difference]: Finished difference. Result has 265 places, 308 transitions, 3420 flow [2024-06-03 20:52:15,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3148, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3420, PETRI_PLACES=265, PETRI_TRANSITIONS=308} [2024-06-03 20:52:15,900 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 220 predicate places. [2024-06-03 20:52:15,900 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 308 transitions, 3420 flow [2024-06-03 20:52:15,900 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) [2024-06-03 20:52:15,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:15,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:15,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 20:52:15,901 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:15,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:15,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2097503157, now seen corresponding path program 10 times [2024-06-03 20:52:15,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:15,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031916921] [2024-06-03 20:52:15,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:15,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:16,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:16,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031916921] [2024-06-03 20:52:16,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031916921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:16,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:16,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:16,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485513620] [2024-06-03 20:52:16,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:16,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:16,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:16,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:16,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:16,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:16,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 308 transitions, 3420 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) [2024-06-03 20:52:16,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:16,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:16,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:16,686 INFO L124 PetriNetUnfolderBase]: 1791/3183 cut-off events. [2024-06-03 20:52:16,687 INFO L125 PetriNetUnfolderBase]: For 231584/231584 co-relation queries the response was YES. [2024-06-03 20:52:16,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20829 conditions, 3183 events. 1791/3183 cut-off events. For 231584/231584 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20529 event pairs, 418 based on Foata normal form. 1/3175 useless extension candidates. Maximal degree in co-relation 20718. Up to 2662 conditions per place. [2024-06-03 20:52:16,718 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 224 selfloop transitions, 88 changer transitions 0/321 dead transitions. [2024-06-03 20:52:16,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 321 transitions, 4358 flow [2024-06-03 20:52:16,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:16,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 20:52:16,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-03 20:52:16,720 INFO L175 Difference]: Start difference. First operand has 265 places, 308 transitions, 3420 flow. Second operand 7 states and 173 transitions. [2024-06-03 20:52:16,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 321 transitions, 4358 flow [2024-06-03 20:52:17,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 321 transitions, 4136 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-03 20:52:17,501 INFO L231 Difference]: Finished difference. Result has 268 places, 308 transitions, 3380 flow [2024-06-03 20:52:17,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3198, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3380, PETRI_PLACES=268, PETRI_TRANSITIONS=308} [2024-06-03 20:52:17,501 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 223 predicate places. [2024-06-03 20:52:17,501 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 308 transitions, 3380 flow [2024-06-03 20:52:17,501 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) [2024-06-03 20:52:17,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:17,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:17,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 20:52:17,502 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:17,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:17,502 INFO L85 PathProgramCache]: Analyzing trace with hash -424256587, now seen corresponding path program 11 times [2024-06-03 20:52:17,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:17,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921770479] [2024-06-03 20:52:17,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:17,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:17,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:17,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921770479] [2024-06-03 20:52:17,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921770479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:17,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:17,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:17,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248563955] [2024-06-03 20:52:17,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:17,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:17,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:17,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:17,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:17,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:17,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 308 transitions, 3380 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) [2024-06-03 20:52:17,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:17,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:17,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:18,337 INFO L124 PetriNetUnfolderBase]: 1788/3188 cut-off events. [2024-06-03 20:52:18,338 INFO L125 PetriNetUnfolderBase]: For 234365/234365 co-relation queries the response was YES. [2024-06-03 20:52:18,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20778 conditions, 3188 events. 1788/3188 cut-off events. For 234365/234365 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20526 event pairs, 403 based on Foata normal form. 1/3185 useless extension candidates. Maximal degree in co-relation 20666. Up to 2746 conditions per place. [2024-06-03 20:52:18,373 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 272 selfloop transitions, 41 changer transitions 0/322 dead transitions. [2024-06-03 20:52:18,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 322 transitions, 4182 flow [2024-06-03 20:52:18,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:52:18,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:52:18,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-03 20:52:18,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5252525252525253 [2024-06-03 20:52:18,374 INFO L175 Difference]: Start difference. First operand has 268 places, 308 transitions, 3380 flow. Second operand 9 states and 208 transitions. [2024-06-03 20:52:18,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 322 transitions, 4182 flow [2024-06-03 20:52:19,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 322 transitions, 3982 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 20:52:19,252 INFO L231 Difference]: Finished difference. Result has 272 places, 308 transitions, 3268 flow [2024-06-03 20:52:19,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3180, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3268, PETRI_PLACES=272, PETRI_TRANSITIONS=308} [2024-06-03 20:52:19,253 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 227 predicate places. [2024-06-03 20:52:19,253 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 308 transitions, 3268 flow [2024-06-03 20:52:19,253 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) [2024-06-03 20:52:19,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:19,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:19,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 20:52:19,254 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:19,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:19,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1759009129, now seen corresponding path program 12 times [2024-06-03 20:52:19,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:19,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682847839] [2024-06-03 20:52:19,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:19,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:19,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:19,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682847839] [2024-06-03 20:52:19,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682847839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:19,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:19,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:19,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297087724] [2024-06-03 20:52:19,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:19,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:19,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:19,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:19,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:19,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:19,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 308 transitions, 3268 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) [2024-06-03 20:52:19,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:19,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:19,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:20,069 INFO L124 PetriNetUnfolderBase]: 1785/3184 cut-off events. [2024-06-03 20:52:20,069 INFO L125 PetriNetUnfolderBase]: For 237303/237303 co-relation queries the response was YES. [2024-06-03 20:52:20,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20649 conditions, 3184 events. 1785/3184 cut-off events. For 237303/237303 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20499 event pairs, 403 based on Foata normal form. 1/3181 useless extension candidates. Maximal degree in co-relation 20536. Up to 2743 conditions per place. [2024-06-03 20:52:20,101 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 270 selfloop transitions, 40 changer transitions 0/319 dead transitions. [2024-06-03 20:52:20,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 319 transitions, 3914 flow [2024-06-03 20:52:20,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:20,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:20,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-03 20:52:20,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2024-06-03 20:52:20,102 INFO L175 Difference]: Start difference. First operand has 272 places, 308 transitions, 3268 flow. Second operand 7 states and 167 transitions. [2024-06-03 20:52:20,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 319 transitions, 3914 flow [2024-06-03 20:52:20,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 319 transitions, 3720 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-03 20:52:20,944 INFO L231 Difference]: Finished difference. Result has 270 places, 308 transitions, 3160 flow [2024-06-03 20:52:20,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3074, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3160, PETRI_PLACES=270, PETRI_TRANSITIONS=308} [2024-06-03 20:52:20,944 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 225 predicate places. [2024-06-03 20:52:20,945 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 308 transitions, 3160 flow [2024-06-03 20:52:20,945 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) [2024-06-03 20:52:20,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:20,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:20,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 20:52:20,945 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:20,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:20,946 INFO L85 PathProgramCache]: Analyzing trace with hash 2106084949, now seen corresponding path program 2 times [2024-06-03 20:52:20,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:20,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90812353] [2024-06-03 20:52:20,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:20,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:21,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:21,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90812353] [2024-06-03 20:52:21,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90812353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:21,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:21,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:21,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669433418] [2024-06-03 20:52:21,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:21,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:21,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:21,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:21,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:21,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:52:21,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 308 transitions, 3160 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:21,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:21,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:52:21,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:21,781 INFO L124 PetriNetUnfolderBase]: 1716/3090 cut-off events. [2024-06-03 20:52:21,782 INFO L125 PetriNetUnfolderBase]: For 267062/267062 co-relation queries the response was YES. [2024-06-03 20:52:21,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20262 conditions, 3090 events. 1716/3090 cut-off events. For 267062/267062 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 20158 event pairs, 392 based on Foata normal form. 10/3067 useless extension candidates. Maximal degree in co-relation 20150. Up to 2473 conditions per place. [2024-06-03 20:52:21,810 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 232 selfloop transitions, 37 changer transitions 0/324 dead transitions. [2024-06-03 20:52:21,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 324 transitions, 3776 flow [2024-06-03 20:52:21,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:21,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:21,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-03 20:52:21,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-03 20:52:21,812 INFO L175 Difference]: Start difference. First operand has 270 places, 308 transitions, 3160 flow. Second operand 7 states and 175 transitions. [2024-06-03 20:52:21,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 324 transitions, 3776 flow [2024-06-03 20:52:22,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 324 transitions, 3696 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 20:52:22,545 INFO L231 Difference]: Finished difference. Result has 271 places, 309 transitions, 3182 flow [2024-06-03 20:52:22,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3080, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3182, PETRI_PLACES=271, PETRI_TRANSITIONS=309} [2024-06-03 20:52:22,545 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 226 predicate places. [2024-06-03 20:52:22,545 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 309 transitions, 3182 flow [2024-06-03 20:52:22,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:22,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:22,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:22,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 20:52:22,546 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:22,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:22,546 INFO L85 PathProgramCache]: Analyzing trace with hash -414334665, now seen corresponding path program 3 times [2024-06-03 20:52:22,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:22,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020815599] [2024-06-03 20:52:22,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:22,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:22,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:22,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020815599] [2024-06-03 20:52:22,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020815599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:22,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:22,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:22,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891565011] [2024-06-03 20:52:22,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:22,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:22,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:22,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:22,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:22,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:52:22,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 309 transitions, 3182 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:22,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:22,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:52:22,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:23,415 INFO L124 PetriNetUnfolderBase]: 1745/3159 cut-off events. [2024-06-03 20:52:23,415 INFO L125 PetriNetUnfolderBase]: For 275014/275014 co-relation queries the response was YES. [2024-06-03 20:52:23,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20804 conditions, 3159 events. 1745/3159 cut-off events. For 275014/275014 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20713 event pairs, 391 based on Foata normal form. 9/3140 useless extension candidates. Maximal degree in co-relation 20691. Up to 2557 conditions per place. [2024-06-03 20:52:23,448 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 254 selfloop transitions, 16 changer transitions 0/325 dead transitions. [2024-06-03 20:52:23,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 325 transitions, 3802 flow [2024-06-03 20:52:23,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:23,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:52:23,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5551948051948052 [2024-06-03 20:52:23,450 INFO L175 Difference]: Start difference. First operand has 271 places, 309 transitions, 3182 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:52:23,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 325 transitions, 3802 flow [2024-06-03 20:52:24,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 325 transitions, 3722 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 20:52:24,283 INFO L231 Difference]: Finished difference. Result has 273 places, 310 transitions, 3164 flow [2024-06-03 20:52:24,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3102, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3164, PETRI_PLACES=273, PETRI_TRANSITIONS=310} [2024-06-03 20:52:24,284 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 228 predicate places. [2024-06-03 20:52:24,284 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 310 transitions, 3164 flow [2024-06-03 20:52:24,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:24,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:24,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:24,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 20:52:24,285 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:24,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:24,285 INFO L85 PathProgramCache]: Analyzing trace with hash -413770155, now seen corresponding path program 4 times [2024-06-03 20:52:24,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:24,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183298517] [2024-06-03 20:52:24,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:24,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:24,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:24,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183298517] [2024-06-03 20:52:24,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183298517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:24,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:24,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:24,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112624307] [2024-06-03 20:52:24,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:24,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:24,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:24,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:24,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:24,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:52:24,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 310 transitions, 3164 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:24,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:24,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:52:24,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:25,150 INFO L124 PetriNetUnfolderBase]: 1747/3171 cut-off events. [2024-06-03 20:52:25,151 INFO L125 PetriNetUnfolderBase]: For 264558/264558 co-relation queries the response was YES. [2024-06-03 20:52:25,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20531 conditions, 3171 events. 1747/3171 cut-off events. For 264558/264558 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20841 event pairs, 385 based on Foata normal form. 8/3154 useless extension candidates. Maximal degree in co-relation 20417. Up to 2535 conditions per place. [2024-06-03 20:52:25,184 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 256 selfloop transitions, 19 changer transitions 0/330 dead transitions. [2024-06-03 20:52:25,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 330 transitions, 3816 flow [2024-06-03 20:52:25,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:52:25,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:52:25,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-03 20:52:25,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511363636363636 [2024-06-03 20:52:25,185 INFO L175 Difference]: Start difference. First operand has 273 places, 310 transitions, 3164 flow. Second operand 8 states and 194 transitions. [2024-06-03 20:52:25,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 330 transitions, 3816 flow [2024-06-03 20:52:25,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 330 transitions, 3776 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 20:52:25,761 INFO L231 Difference]: Finished difference. Result has 276 places, 311 transitions, 3192 flow [2024-06-03 20:52:25,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3124, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3192, PETRI_PLACES=276, PETRI_TRANSITIONS=311} [2024-06-03 20:52:25,761 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 231 predicate places. [2024-06-03 20:52:25,761 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 311 transitions, 3192 flow [2024-06-03 20:52:25,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:25,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:25,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:25,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 20:52:25,762 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:25,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:25,762 INFO L85 PathProgramCache]: Analyzing trace with hash -2085883083, now seen corresponding path program 1 times [2024-06-03 20:52:25,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:25,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214637640] [2024-06-03 20:52:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:25,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:26,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:26,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214637640] [2024-06-03 20:52:26,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214637640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:26,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:26,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:26,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332980827] [2024-06-03 20:52:26,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:26,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:26,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:26,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:26,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:26,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:52:26,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 311 transitions, 3192 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:26,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:26,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:52:26,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:26,726 INFO L124 PetriNetUnfolderBase]: 1874/3370 cut-off events. [2024-06-03 20:52:26,726 INFO L125 PetriNetUnfolderBase]: For 304652/304652 co-relation queries the response was YES. [2024-06-03 20:52:26,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22486 conditions, 3370 events. 1874/3370 cut-off events. For 304652/304652 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 22172 event pairs, 386 based on Foata normal form. 8/3373 useless extension candidates. Maximal degree in co-relation 22371. Up to 2710 conditions per place. [2024-06-03 20:52:26,757 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 271 selfloop transitions, 19 changer transitions 0/342 dead transitions. [2024-06-03 20:52:26,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 342 transitions, 4070 flow [2024-06-03 20:52:26,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:52:26,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:52:26,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-03 20:52:26,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-03 20:52:26,758 INFO L175 Difference]: Start difference. First operand has 276 places, 311 transitions, 3192 flow. Second operand 8 states and 204 transitions. [2024-06-03 20:52:26,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 342 transitions, 4070 flow [2024-06-03 20:52:27,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 342 transitions, 4018 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 20:52:27,697 INFO L231 Difference]: Finished difference. Result has 278 places, 313 transitions, 3220 flow [2024-06-03 20:52:27,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3140, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3220, PETRI_PLACES=278, PETRI_TRANSITIONS=313} [2024-06-03 20:52:27,697 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 233 predicate places. [2024-06-03 20:52:27,698 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 313 transitions, 3220 flow [2024-06-03 20:52:27,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:27,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:27,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:27,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 20:52:27,698 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:27,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:27,698 INFO L85 PathProgramCache]: Analyzing trace with hash -33109813, now seen corresponding path program 2 times [2024-06-03 20:52:27,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:27,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820593282] [2024-06-03 20:52:27,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:27,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:28,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:28,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820593282] [2024-06-03 20:52:28,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820593282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:28,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:28,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:28,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667164045] [2024-06-03 20:52:28,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:28,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:28,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:28,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:28,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:28,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:52:28,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 313 transitions, 3220 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:28,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:28,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:52:28,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:28,609 INFO L124 PetriNetUnfolderBase]: 1852/3332 cut-off events. [2024-06-03 20:52:28,609 INFO L125 PetriNetUnfolderBase]: For 286977/286977 co-relation queries the response was YES. [2024-06-03 20:52:28,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21549 conditions, 3332 events. 1852/3332 cut-off events. For 286977/286977 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 21956 event pairs, 401 based on Foata normal form. 9/3337 useless extension candidates. Maximal degree in co-relation 21433. Up to 2743 conditions per place. [2024-06-03 20:52:28,647 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 266 selfloop transitions, 16 changer transitions 0/334 dead transitions. [2024-06-03 20:52:28,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 334 transitions, 3862 flow [2024-06-03 20:52:28,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:28,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:28,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-03 20:52:28,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5746753246753247 [2024-06-03 20:52:28,650 INFO L175 Difference]: Start difference. First operand has 278 places, 313 transitions, 3220 flow. Second operand 7 states and 177 transitions. [2024-06-03 20:52:28,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 334 transitions, 3862 flow [2024-06-03 20:52:29,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 334 transitions, 3832 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 20:52:29,938 INFO L231 Difference]: Finished difference. Result has 281 places, 313 transitions, 3228 flow [2024-06-03 20:52:29,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3190, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3228, PETRI_PLACES=281, PETRI_TRANSITIONS=313} [2024-06-03 20:52:29,939 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 236 predicate places. [2024-06-03 20:52:29,939 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 313 transitions, 3228 flow [2024-06-03 20:52:29,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:29,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:29,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:29,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 20:52:29,940 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:29,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:29,940 INFO L85 PathProgramCache]: Analyzing trace with hash 2112026639, now seen corresponding path program 3 times [2024-06-03 20:52:29,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:29,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361792428] [2024-06-03 20:52:29,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:29,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:30,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:30,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361792428] [2024-06-03 20:52:30,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361792428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:30,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:30,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:30,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024579429] [2024-06-03 20:52:30,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:30,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:30,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:30,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:30,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:30,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:52:30,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 313 transitions, 3228 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:30,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:30,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:52:30,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:30,797 INFO L124 PetriNetUnfolderBase]: 1886/3385 cut-off events. [2024-06-03 20:52:30,797 INFO L125 PetriNetUnfolderBase]: For 294659/294659 co-relation queries the response was YES. [2024-06-03 20:52:30,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21964 conditions, 3385 events. 1886/3385 cut-off events. For 294659/294659 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 22300 event pairs, 410 based on Foata normal form. 10/3388 useless extension candidates. Maximal degree in co-relation 21846. Up to 2766 conditions per place. [2024-06-03 20:52:30,834 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 241 selfloop transitions, 39 changer transitions 0/332 dead transitions. [2024-06-03 20:52:30,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 332 transitions, 3878 flow [2024-06-03 20:52:30,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:30,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:30,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-03 20:52:30,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577922077922078 [2024-06-03 20:52:30,835 INFO L175 Difference]: Start difference. First operand has 281 places, 313 transitions, 3228 flow. Second operand 7 states and 178 transitions. [2024-06-03 20:52:30,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 332 transitions, 3878 flow [2024-06-03 20:52:31,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 332 transitions, 3841 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-03 20:52:31,928 INFO L231 Difference]: Finished difference. Result has 282 places, 314 transitions, 3297 flow [2024-06-03 20:52:31,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3191, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3297, PETRI_PLACES=282, PETRI_TRANSITIONS=314} [2024-06-03 20:52:31,929 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 237 predicate places. [2024-06-03 20:52:31,929 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 314 transitions, 3297 flow [2024-06-03 20:52:31,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:31,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:31,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:31,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 20:52:31,930 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:31,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:31,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1795415691, now seen corresponding path program 1 times [2024-06-03 20:52:31,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:31,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309587845] [2024-06-03 20:52:31,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:31,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:32,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:32,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:32,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309587845] [2024-06-03 20:52:32,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309587845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:32,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:32,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:32,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890315904] [2024-06-03 20:52:32,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:32,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:32,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:32,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:32,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:32,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:32,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 314 transitions, 3297 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) [2024-06-03 20:52:32,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:32,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:32,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:32,858 INFO L124 PetriNetUnfolderBase]: 1967/3485 cut-off events. [2024-06-03 20:52:32,858 INFO L125 PetriNetUnfolderBase]: For 275559/275559 co-relation queries the response was YES. [2024-06-03 20:52:32,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22616 conditions, 3485 events. 1967/3485 cut-off events. For 275559/275559 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22678 event pairs, 429 based on Foata normal form. 2/3483 useless extension candidates. Maximal degree in co-relation 22497. Up to 3038 conditions per place. [2024-06-03 20:52:32,890 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 295 selfloop transitions, 27 changer transitions 0/331 dead transitions. [2024-06-03 20:52:32,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 331 transitions, 4013 flow [2024-06-03 20:52:32,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:32,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:32,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:52:32,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2024-06-03 20:52:32,891 INFO L175 Difference]: Start difference. First operand has 282 places, 314 transitions, 3297 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:52:32,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 331 transitions, 4013 flow [2024-06-03 20:52:33,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 331 transitions, 3931 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 20:52:33,720 INFO L231 Difference]: Finished difference. Result has 284 places, 316 transitions, 3314 flow [2024-06-03 20:52:33,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3215, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3314, PETRI_PLACES=284, PETRI_TRANSITIONS=316} [2024-06-03 20:52:33,720 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 239 predicate places. [2024-06-03 20:52:33,720 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 316 transitions, 3314 flow [2024-06-03 20:52:33,721 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) [2024-06-03 20:52:33,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:33,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:33,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 20:52:33,721 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:33,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:33,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1127941515, now seen corresponding path program 4 times [2024-06-03 20:52:33,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:33,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682093239] [2024-06-03 20:52:33,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:33,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:34,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:34,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682093239] [2024-06-03 20:52:34,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682093239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:34,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:34,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:34,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722702984] [2024-06-03 20:52:34,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:34,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:34,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:34,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:34,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:34,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-03 20:52:34,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 316 transitions, 3314 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:34,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:34,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-03 20:52:34,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:34,568 INFO L124 PetriNetUnfolderBase]: 1904/3424 cut-off events. [2024-06-03 20:52:34,568 INFO L125 PetriNetUnfolderBase]: For 296032/296032 co-relation queries the response was YES. [2024-06-03 20:52:34,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22132 conditions, 3424 events. 1904/3424 cut-off events. For 296032/296032 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22639 event pairs, 417 based on Foata normal form. 10/3426 useless extension candidates. Maximal degree in co-relation 22012. Up to 2798 conditions per place. [2024-06-03 20:52:34,604 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 240 selfloop transitions, 40 changer transitions 0/332 dead transitions. [2024-06-03 20:52:34,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 332 transitions, 3960 flow [2024-06-03 20:52:34,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:34,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:34,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-03 20:52:34,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-03 20:52:34,606 INFO L175 Difference]: Start difference. First operand has 284 places, 316 transitions, 3314 flow. Second operand 7 states and 175 transitions. [2024-06-03 20:52:34,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 332 transitions, 3960 flow [2024-06-03 20:52:35,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 332 transitions, 3877 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 20:52:35,651 INFO L231 Difference]: Finished difference. Result has 286 places, 317 transitions, 3343 flow [2024-06-03 20:52:35,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3231, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3343, PETRI_PLACES=286, PETRI_TRANSITIONS=317} [2024-06-03 20:52:35,651 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 241 predicate places. [2024-06-03 20:52:35,651 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 317 transitions, 3343 flow [2024-06-03 20:52:35,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:35,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:35,652 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] [2024-06-03 20:52:35,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 20:52:35,652 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:35,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:35,652 INFO L85 PathProgramCache]: Analyzing trace with hash -70919819, now seen corresponding path program 2 times [2024-06-03 20:52:35,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:35,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676692370] [2024-06-03 20:52:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:35,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:36,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:36,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676692370] [2024-06-03 20:52:36,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676692370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:36,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:36,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:36,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350729044] [2024-06-03 20:52:36,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:36,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:36,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:36,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:36,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:36,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:36,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 317 transitions, 3343 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) [2024-06-03 20:52:36,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:36,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:36,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:36,631 INFO L124 PetriNetUnfolderBase]: 1985/3516 cut-off events. [2024-06-03 20:52:36,632 INFO L125 PetriNetUnfolderBase]: For 275702/275702 co-relation queries the response was YES. [2024-06-03 20:52:36,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22715 conditions, 3516 events. 1985/3516 cut-off events. For 275702/275702 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 22916 event pairs, 435 based on Foata normal form. 2/3514 useless extension candidates. Maximal degree in co-relation 22594. Up to 3068 conditions per place. [2024-06-03 20:52:36,669 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 295 selfloop transitions, 27 changer transitions 0/331 dead transitions. [2024-06-03 20:52:36,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 331 transitions, 4057 flow [2024-06-03 20:52:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:36,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:36,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-03 20:52:36,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2024-06-03 20:52:36,671 INFO L175 Difference]: Start difference. First operand has 286 places, 317 transitions, 3343 flow. Second operand 7 states and 167 transitions. [2024-06-03 20:52:36,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 331 transitions, 4057 flow [2024-06-03 20:52:37,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 331 transitions, 3969 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 20:52:37,339 INFO L231 Difference]: Finished difference. Result has 288 places, 319 transitions, 3360 flow [2024-06-03 20:52:37,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3255, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3360, PETRI_PLACES=288, PETRI_TRANSITIONS=319} [2024-06-03 20:52:37,352 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 243 predicate places. [2024-06-03 20:52:37,353 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 319 transitions, 3360 flow [2024-06-03 20:52:37,353 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) [2024-06-03 20:52:37,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:37,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:37,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 20:52:37,353 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:37,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:37,354 INFO L85 PathProgramCache]: Analyzing trace with hash -424238731, now seen corresponding path program 3 times [2024-06-03 20:52:37,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:37,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784177862] [2024-06-03 20:52:37,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:37,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:37,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:37,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784177862] [2024-06-03 20:52:37,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784177862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:37,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:37,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:37,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612367964] [2024-06-03 20:52:37,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:37,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:37,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:37,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:37,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:37,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:37,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 319 transitions, 3360 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) [2024-06-03 20:52:37,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:37,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:37,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:38,227 INFO L124 PetriNetUnfolderBase]: 1993/3530 cut-off events. [2024-06-03 20:52:38,228 INFO L125 PetriNetUnfolderBase]: For 282013/282013 co-relation queries the response was YES. [2024-06-03 20:52:38,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22860 conditions, 3530 events. 1993/3530 cut-off events. For 282013/282013 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 22994 event pairs, 437 based on Foata normal form. 2/3528 useless extension candidates. Maximal degree in co-relation 22738. Up to 3080 conditions per place. [2024-06-03 20:52:38,266 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 296 selfloop transitions, 28 changer transitions 0/333 dead transitions. [2024-06-03 20:52:38,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 333 transitions, 4082 flow [2024-06-03 20:52:38,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:38,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:38,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 20:52:38,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538961038961039 [2024-06-03 20:52:38,267 INFO L175 Difference]: Start difference. First operand has 288 places, 319 transitions, 3360 flow. Second operand 7 states and 166 transitions. [2024-06-03 20:52:38,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 333 transitions, 4082 flow [2024-06-03 20:52:39,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 333 transitions, 3993 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 20:52:39,240 INFO L231 Difference]: Finished difference. Result has 290 places, 321 transitions, 3382 flow [2024-06-03 20:52:39,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3271, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3382, PETRI_PLACES=290, PETRI_TRANSITIONS=321} [2024-06-03 20:52:39,241 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 245 predicate places. [2024-06-03 20:52:39,241 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 321 transitions, 3382 flow [2024-06-03 20:52:39,241 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) [2024-06-03 20:52:39,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:39,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:39,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 20:52:39,241 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:39,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:39,242 INFO L85 PathProgramCache]: Analyzing trace with hash -413763211, now seen corresponding path program 4 times [2024-06-03 20:52:39,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:39,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321542217] [2024-06-03 20:52:39,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:39,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:39,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:39,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321542217] [2024-06-03 20:52:39,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321542217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:39,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:39,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:52:39,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747762366] [2024-06-03 20:52:39,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:39,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:52:39,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:39,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:52:39,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:52:39,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:39,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 321 transitions, 3382 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) [2024-06-03 20:52:39,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:39,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:39,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:40,125 INFO L124 PetriNetUnfolderBase]: 1988/3527 cut-off events. [2024-06-03 20:52:40,125 INFO L125 PetriNetUnfolderBase]: For 281656/281656 co-relation queries the response was YES. [2024-06-03 20:52:40,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22756 conditions, 3527 events. 1988/3527 cut-off events. For 281656/281656 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23011 event pairs, 417 based on Foata normal form. 2/3525 useless extension candidates. Maximal degree in co-relation 22633. Up to 3047 conditions per place. [2024-06-03 20:52:40,169 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 292 selfloop transitions, 35 changer transitions 0/336 dead transitions. [2024-06-03 20:52:40,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 336 transitions, 4116 flow [2024-06-03 20:52:40,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:40,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:40,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-03 20:52:40,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2024-06-03 20:52:40,170 INFO L175 Difference]: Start difference. First operand has 290 places, 321 transitions, 3382 flow. Second operand 7 states and 167 transitions. [2024-06-03 20:52:40,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 336 transitions, 4116 flow [2024-06-03 20:52:41,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 336 transitions, 4021 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 20:52:41,060 INFO L231 Difference]: Finished difference. Result has 292 places, 323 transitions, 3416 flow [2024-06-03 20:52:41,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3287, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3416, PETRI_PLACES=292, PETRI_TRANSITIONS=323} [2024-06-03 20:52:41,060 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 247 predicate places. [2024-06-03 20:52:41,060 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 323 transitions, 3416 flow [2024-06-03 20:52:41,060 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) [2024-06-03 20:52:41,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:41,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:41,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 20:52:41,061 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:41,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:41,061 INFO L85 PathProgramCache]: Analyzing trace with hash 613354516, now seen corresponding path program 1 times [2024-06-03 20:52:41,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:41,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965231328] [2024-06-03 20:52:41,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:41,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:41,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:41,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965231328] [2024-06-03 20:52:41,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965231328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:41,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:41,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:52:41,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122645811] [2024-06-03 20:52:41,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:41,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:52:41,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:41,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:52:41,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:52:41,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:41,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 323 transitions, 3416 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) [2024-06-03 20:52:41,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:41,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:41,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:42,159 INFO L124 PetriNetUnfolderBase]: 2022/3583 cut-off events. [2024-06-03 20:52:42,159 INFO L125 PetriNetUnfolderBase]: For 301372/301372 co-relation queries the response was YES. [2024-06-03 20:52:42,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23584 conditions, 3583 events. 2022/3583 cut-off events. For 301372/301372 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 23405 event pairs, 321 based on Foata normal form. 2/3582 useless extension candidates. Maximal degree in co-relation 23460. Up to 2941 conditions per place. [2024-06-03 20:52:42,200 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 299 selfloop transitions, 55 changer transitions 0/363 dead transitions. [2024-06-03 20:52:42,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 363 transitions, 4681 flow [2024-06-03 20:52:42,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:52:42,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:52:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-03 20:52:42,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-03 20:52:42,202 INFO L175 Difference]: Start difference. First operand has 292 places, 323 transitions, 3416 flow. Second operand 8 states and 208 transitions. [2024-06-03 20:52:42,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 363 transitions, 4681 flow [2024-06-03 20:52:42,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 363 transitions, 4568 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-03 20:52:42,941 INFO L231 Difference]: Finished difference. Result has 296 places, 330 transitions, 3551 flow [2024-06-03 20:52:42,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3303, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3551, PETRI_PLACES=296, PETRI_TRANSITIONS=330} [2024-06-03 20:52:42,942 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 251 predicate places. [2024-06-03 20:52:42,942 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 330 transitions, 3551 flow [2024-06-03 20:52:42,942 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) [2024-06-03 20:52:42,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:42,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:42,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 20:52:42,942 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:42,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:42,943 INFO L85 PathProgramCache]: Analyzing trace with hash 620020756, now seen corresponding path program 2 times [2024-06-03 20:52:42,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:42,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418364274] [2024-06-03 20:52:42,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:42,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:43,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:43,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418364274] [2024-06-03 20:52:43,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418364274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:43,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:43,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:52:43,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181093565] [2024-06-03 20:52:43,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:43,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:52:43,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:43,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:52:43,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:52:43,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:43,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 330 transitions, 3551 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) [2024-06-03 20:52:43,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:43,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:43,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:44,085 INFO L124 PetriNetUnfolderBase]: 2043/3620 cut-off events. [2024-06-03 20:52:44,086 INFO L125 PetriNetUnfolderBase]: For 317102/317102 co-relation queries the response was YES. [2024-06-03 20:52:44,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24265 conditions, 3620 events. 2043/3620 cut-off events. For 317102/317102 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 23714 event pairs, 325 based on Foata normal form. 2/3619 useless extension candidates. Maximal degree in co-relation 24139. Up to 2961 conditions per place. [2024-06-03 20:52:44,129 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 297 selfloop transitions, 58 changer transitions 0/364 dead transitions. [2024-06-03 20:52:44,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 364 transitions, 4776 flow [2024-06-03 20:52:44,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:52:44,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:52:44,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-03 20:52:44,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823863636363636 [2024-06-03 20:52:44,130 INFO L175 Difference]: Start difference. First operand has 296 places, 330 transitions, 3551 flow. Second operand 8 states and 205 transitions. [2024-06-03 20:52:44,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 364 transitions, 4776 flow [2024-06-03 20:52:45,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 364 transitions, 4607 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-03 20:52:45,103 INFO L231 Difference]: Finished difference. Result has 302 places, 335 transitions, 3622 flow [2024-06-03 20:52:45,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3424, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3622, PETRI_PLACES=302, PETRI_TRANSITIONS=335} [2024-06-03 20:52:45,103 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 257 predicate places. [2024-06-03 20:52:45,103 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 335 transitions, 3622 flow [2024-06-03 20:52:45,104 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) [2024-06-03 20:52:45,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:45,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:45,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 20:52:45,104 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:45,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:45,104 INFO L85 PathProgramCache]: Analyzing trace with hash 2121444730, now seen corresponding path program 3 times [2024-06-03 20:52:45,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:45,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720800659] [2024-06-03 20:52:45,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:45,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:45,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:45,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720800659] [2024-06-03 20:52:45,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720800659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:45,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:45,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:52:45,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242352940] [2024-06-03 20:52:45,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:45,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:52:45,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:45,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:52:45,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:52:45,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:45,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 335 transitions, 3622 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) [2024-06-03 20:52:45,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:45,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:45,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:46,121 INFO L124 PetriNetUnfolderBase]: 2038/3608 cut-off events. [2024-06-03 20:52:46,121 INFO L125 PetriNetUnfolderBase]: For 314575/314575 co-relation queries the response was YES. [2024-06-03 20:52:46,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23980 conditions, 3608 events. 2038/3608 cut-off events. For 314575/314575 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 23646 event pairs, 410 based on Foata normal form. 2/3602 useless extension candidates. Maximal degree in co-relation 23851. Up to 3061 conditions per place. [2024-06-03 20:52:46,161 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 306 selfloop transitions, 46 changer transitions 0/361 dead transitions. [2024-06-03 20:52:46,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 361 transitions, 4564 flow [2024-06-03 20:52:46,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:46,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-03 20:52:46,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-03 20:52:46,162 INFO L175 Difference]: Start difference. First operand has 302 places, 335 transitions, 3622 flow. Second operand 7 states and 182 transitions. [2024-06-03 20:52:46,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 361 transitions, 4564 flow [2024-06-03 20:52:47,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 361 transitions, 4448 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-03 20:52:47,417 INFO L231 Difference]: Finished difference. Result has 305 places, 335 transitions, 3603 flow [2024-06-03 20:52:47,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3506, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3603, PETRI_PLACES=305, PETRI_TRANSITIONS=335} [2024-06-03 20:52:47,418 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 260 predicate places. [2024-06-03 20:52:47,418 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 335 transitions, 3603 flow [2024-06-03 20:52:47,418 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) [2024-06-03 20:52:47,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:47,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:47,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 20:52:47,418 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:47,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:47,419 INFO L85 PathProgramCache]: Analyzing trace with hash -82980392, now seen corresponding path program 4 times [2024-06-03 20:52:47,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:47,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007790952] [2024-06-03 20:52:47,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:47,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:47,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:47,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007790952] [2024-06-03 20:52:47,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007790952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:47,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:47,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:52:47,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960062752] [2024-06-03 20:52:47,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:47,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:52:47,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:47,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:52:47,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:52:47,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:47,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 335 transitions, 3603 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) [2024-06-03 20:52:47,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:47,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:47,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:48,503 INFO L124 PetriNetUnfolderBase]: 2046/3625 cut-off events. [2024-06-03 20:52:48,504 INFO L125 PetriNetUnfolderBase]: For 321842/321842 co-relation queries the response was YES. [2024-06-03 20:52:48,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24063 conditions, 3625 events. 2046/3625 cut-off events. For 321842/321842 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 23805 event pairs, 417 based on Foata normal form. 2/3624 useless extension candidates. Maximal degree in co-relation 23933. Up to 3106 conditions per place. [2024-06-03 20:52:48,539 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 304 selfloop transitions, 45 changer transitions 0/358 dead transitions. [2024-06-03 20:52:48,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 358 transitions, 4381 flow [2024-06-03 20:52:48,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:48,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:48,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-03 20:52:48,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577922077922078 [2024-06-03 20:52:48,541 INFO L175 Difference]: Start difference. First operand has 305 places, 335 transitions, 3603 flow. Second operand 7 states and 178 transitions. [2024-06-03 20:52:48,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 358 transitions, 4381 flow [2024-06-03 20:52:49,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 358 transitions, 4262 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 20:52:49,797 INFO L231 Difference]: Finished difference. Result has 306 places, 337 transitions, 3611 flow [2024-06-03 20:52:49,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3490, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3611, PETRI_PLACES=306, PETRI_TRANSITIONS=337} [2024-06-03 20:52:49,798 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 261 predicate places. [2024-06-03 20:52:49,798 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 337 transitions, 3611 flow [2024-06-03 20:52:49,798 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) [2024-06-03 20:52:49,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:49,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:49,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 20:52:49,799 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:49,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:49,799 INFO L85 PathProgramCache]: Analyzing trace with hash 882917848, now seen corresponding path program 5 times [2024-06-03 20:52:49,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:49,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093806147] [2024-06-03 20:52:49,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:49,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:50,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:50,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093806147] [2024-06-03 20:52:50,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093806147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:50,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:50,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:52:50,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628665220] [2024-06-03 20:52:50,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:50,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:52:50,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:50,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:52:50,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:52:50,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:50,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 337 transitions, 3611 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) [2024-06-03 20:52:50,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:50,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:50,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:50,965 INFO L124 PetriNetUnfolderBase]: 2067/3660 cut-off events. [2024-06-03 20:52:50,965 INFO L125 PetriNetUnfolderBase]: For 336572/336572 co-relation queries the response was YES. [2024-06-03 20:52:50,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24460 conditions, 3660 events. 2067/3660 cut-off events. For 336572/336572 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 24045 event pairs, 418 based on Foata normal form. 2/3659 useless extension candidates. Maximal degree in co-relation 24329. Up to 3114 conditions per place. [2024-06-03 20:52:51,007 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 304 selfloop transitions, 53 changer transitions 0/366 dead transitions. [2024-06-03 20:52:51,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 366 transitions, 4613 flow [2024-06-03 20:52:51,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:52:51,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:52:51,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-03 20:52:51,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5580808080808081 [2024-06-03 20:52:51,009 INFO L175 Difference]: Start difference. First operand has 306 places, 337 transitions, 3611 flow. Second operand 9 states and 221 transitions. [2024-06-03 20:52:51,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 366 transitions, 4613 flow [2024-06-03 20:52:52,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 366 transitions, 4516 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 20:52:52,229 INFO L231 Difference]: Finished difference. Result has 311 places, 341 transitions, 3692 flow [2024-06-03 20:52:52,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3514, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3692, PETRI_PLACES=311, PETRI_TRANSITIONS=341} [2024-06-03 20:52:52,229 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 266 predicate places. [2024-06-03 20:52:52,230 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 341 transitions, 3692 flow [2024-06-03 20:52:52,230 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) [2024-06-03 20:52:52,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:52,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:52,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 20:52:52,230 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:52,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:52,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1503524880, now seen corresponding path program 6 times [2024-06-03 20:52:52,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:52,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330011131] [2024-06-03 20:52:52,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:52,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:52,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:52,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330011131] [2024-06-03 20:52:52,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330011131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:52,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:52,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:52:52,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511976003] [2024-06-03 20:52:52,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:52,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:52:52,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:52,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:52:52,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:52:52,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:52,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 341 transitions, 3692 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) [2024-06-03 20:52:52,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:52,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:52,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:53,376 INFO L124 PetriNetUnfolderBase]: 2062/3653 cut-off events. [2024-06-03 20:52:53,376 INFO L125 PetriNetUnfolderBase]: For 335885/335885 co-relation queries the response was YES. [2024-06-03 20:52:53,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24410 conditions, 3653 events. 2062/3653 cut-off events. For 335885/335885 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 24040 event pairs, 419 based on Foata normal form. 2/3652 useless extension candidates. Maximal degree in co-relation 24277. Up to 3130 conditions per place. [2024-06-03 20:52:53,418 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 308 selfloop transitions, 47 changer transitions 0/364 dead transitions. [2024-06-03 20:52:53,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 364 transitions, 4458 flow [2024-06-03 20:52:53,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:52:53,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:52:53,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-03 20:52:53,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-03 20:52:53,420 INFO L175 Difference]: Start difference. First operand has 311 places, 341 transitions, 3692 flow. Second operand 9 states and 220 transitions. [2024-06-03 20:52:53,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 364 transitions, 4458 flow [2024-06-03 20:52:54,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 364 transitions, 4344 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 20:52:54,769 INFO L231 Difference]: Finished difference. Result has 314 places, 341 transitions, 3677 flow [2024-06-03 20:52:54,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3578, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3677, PETRI_PLACES=314, PETRI_TRANSITIONS=341} [2024-06-03 20:52:54,770 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 269 predicate places. [2024-06-03 20:52:54,770 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 341 transitions, 3677 flow [2024-06-03 20:52:54,770 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) [2024-06-03 20:52:54,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:54,770 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, 1, 1] [2024-06-03 20:52:54,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 20:52:54,770 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:54,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:54,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1034786064, now seen corresponding path program 1 times [2024-06-03 20:52:54,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:54,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575207623] [2024-06-03 20:52:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:54,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:55,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:55,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575207623] [2024-06-03 20:52:55,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575207623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:55,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:55,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:52:55,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701159007] [2024-06-03 20:52:55,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:55,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:52:55,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:55,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:52:55,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:52:55,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:55,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 341 transitions, 3677 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) [2024-06-03 20:52:55,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:55,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:55,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:55,873 INFO L124 PetriNetUnfolderBase]: 2067/3663 cut-off events. [2024-06-03 20:52:55,873 INFO L125 PetriNetUnfolderBase]: For 338612/338612 co-relation queries the response was YES. [2024-06-03 20:52:55,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24500 conditions, 3663 events. 2067/3663 cut-off events. For 338612/338612 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 24118 event pairs, 417 based on Foata normal form. 1/3662 useless extension candidates. Maximal degree in co-relation 24366. Up to 3154 conditions per place. [2024-06-03 20:52:55,919 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 331 selfloop transitions, 27 changer transitions 0/367 dead transitions. [2024-06-03 20:52:55,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 367 transitions, 4499 flow [2024-06-03 20:52:55,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:55,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:55,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-03 20:52:55,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811688311688312 [2024-06-03 20:52:55,921 INFO L175 Difference]: Start difference. First operand has 314 places, 341 transitions, 3677 flow. Second operand 7 states and 179 transitions. [2024-06-03 20:52:55,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 367 transitions, 4499 flow [2024-06-03 20:52:57,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 367 transitions, 4395 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 20:52:57,596 INFO L231 Difference]: Finished difference. Result has 313 places, 344 transitions, 3691 flow [2024-06-03 20:52:57,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3573, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3691, PETRI_PLACES=313, PETRI_TRANSITIONS=344} [2024-06-03 20:52:57,596 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 268 predicate places. [2024-06-03 20:52:57,596 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 344 transitions, 3691 flow [2024-06-03 20:52:57,596 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) [2024-06-03 20:52:57,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:57,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:57,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 20:52:57,597 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:52:57,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:57,597 INFO L85 PathProgramCache]: Analyzing trace with hash -926546060, now seen corresponding path program 2 times [2024-06-03 20:52:57,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:57,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505906600] [2024-06-03 20:52:57,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:57,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:57,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:57,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505906600] [2024-06-03 20:52:57,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505906600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:57,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:57,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:52:57,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123095564] [2024-06-03 20:52:57,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:57,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:52:57,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:57,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:52:57,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:52:58,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:52:58,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 344 transitions, 3691 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) [2024-06-03 20:52:58,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:58,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:52:58,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:58,640 INFO L124 PetriNetUnfolderBase]: 2080/3684 cut-off events. [2024-06-03 20:52:58,641 INFO L125 PetriNetUnfolderBase]: For 351167/351167 co-relation queries the response was YES. [2024-06-03 20:52:58,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25135 conditions, 3684 events. 2080/3684 cut-off events. For 351167/351167 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24264 event pairs, 418 based on Foata normal form. 1/3682 useless extension candidates. Maximal degree in co-relation 25000. Up to 3119 conditions per place. [2024-06-03 20:52:58,684 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 298 selfloop transitions, 64 changer transitions 0/371 dead transitions. [2024-06-03 20:52:58,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 371 transitions, 4759 flow [2024-06-03 20:52:58,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:58,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:58,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-03 20:52:58,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-03 20:52:58,685 INFO L175 Difference]: Start difference. First operand has 313 places, 344 transitions, 3691 flow. Second operand 7 states and 182 transitions. [2024-06-03 20:52:58,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 371 transitions, 4759 flow [2024-06-03 20:53:00,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 371 transitions, 4679 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-03 20:53:00,125 INFO L231 Difference]: Finished difference. Result has 316 places, 350 transitions, 3863 flow [2024-06-03 20:53:00,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3611, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3863, PETRI_PLACES=316, PETRI_TRANSITIONS=350} [2024-06-03 20:53:00,126 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 271 predicate places. [2024-06-03 20:53:00,126 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 350 transitions, 3863 flow [2024-06-03 20:53:00,126 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) [2024-06-03 20:53:00,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:00,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:00,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 20:53:00,126 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:00,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:00,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1503529840, now seen corresponding path program 3 times [2024-06-03 20:53:00,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:00,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120999274] [2024-06-03 20:53:00,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:00,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:00,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:00,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120999274] [2024-06-03 20:53:00,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120999274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:00,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:00,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:00,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035130669] [2024-06-03 20:53:00,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:00,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:00,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:00,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:00,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:00,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:53:00,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 350 transitions, 3863 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) [2024-06-03 20:53:00,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:00,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:53:00,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:01,222 INFO L124 PetriNetUnfolderBase]: 2085/3693 cut-off events. [2024-06-03 20:53:01,222 INFO L125 PetriNetUnfolderBase]: For 361409/361409 co-relation queries the response was YES. [2024-06-03 20:53:01,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25681 conditions, 3693 events. 2085/3693 cut-off events. For 361409/361409 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24350 event pairs, 418 based on Foata normal form. 1/3691 useless extension candidates. Maximal degree in co-relation 25545. Up to 3125 conditions per place. [2024-06-03 20:53:01,267 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 298 selfloop transitions, 69 changer transitions 0/376 dead transitions. [2024-06-03 20:53:01,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 376 transitions, 4899 flow [2024-06-03 20:53:01,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:53:01,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:53:01,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-03 20:53:01,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5656565656565656 [2024-06-03 20:53:01,269 INFO L175 Difference]: Start difference. First operand has 316 places, 350 transitions, 3863 flow. Second operand 9 states and 224 transitions. [2024-06-03 20:53:01,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 376 transitions, 4899 flow [2024-06-03 20:53:02,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 376 transitions, 4790 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-03 20:53:02,839 INFO L231 Difference]: Finished difference. Result has 321 places, 353 transitions, 3964 flow [2024-06-03 20:53:02,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3766, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3964, PETRI_PLACES=321, PETRI_TRANSITIONS=353} [2024-06-03 20:53:02,840 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 276 predicate places. [2024-06-03 20:53:02,840 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 353 transitions, 3964 flow [2024-06-03 20:53:02,840 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) [2024-06-03 20:53:02,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:02,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:02,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 20:53:02,840 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:02,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:02,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1923232694, now seen corresponding path program 1 times [2024-06-03 20:53:02,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:02,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848303870] [2024-06-03 20:53:02,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:02,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:03,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:03,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848303870] [2024-06-03 20:53:03,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848303870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:03,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:03,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:03,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940698701] [2024-06-03 20:53:03,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:03,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:03,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:03,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:03,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:03,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:53:03,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 353 transitions, 3964 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) [2024-06-03 20:53:03,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:03,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:53:03,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:03,905 INFO L124 PetriNetUnfolderBase]: 2098/3714 cut-off events. [2024-06-03 20:53:03,905 INFO L125 PetriNetUnfolderBase]: For 366090/366090 co-relation queries the response was YES. [2024-06-03 20:53:03,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26036 conditions, 3714 events. 2098/3714 cut-off events. For 366090/366090 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 24473 event pairs, 418 based on Foata normal form. 1/3711 useless extension candidates. Maximal degree in co-relation 25899. Up to 3128 conditions per place. [2024-06-03 20:53:03,950 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 295 selfloop transitions, 76 changer transitions 0/380 dead transitions. [2024-06-03 20:53:03,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 380 transitions, 5056 flow [2024-06-03 20:53:03,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:53:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:53:03,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-03 20:53:03,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5941558441558441 [2024-06-03 20:53:03,952 INFO L175 Difference]: Start difference. First operand has 321 places, 353 transitions, 3964 flow. Second operand 7 states and 183 transitions. [2024-06-03 20:53:03,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 380 transitions, 5056 flow [2024-06-03 20:53:05,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 380 transitions, 4872 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-03 20:53:05,700 INFO L231 Difference]: Finished difference. Result has 320 places, 359 transitions, 4062 flow [2024-06-03 20:53:05,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3782, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4062, PETRI_PLACES=320, PETRI_TRANSITIONS=359} [2024-06-03 20:53:05,701 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 275 predicate places. [2024-06-03 20:53:05,701 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 359 transitions, 4062 flow [2024-06-03 20:53:05,701 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) [2024-06-03 20:53:05,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:05,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:05,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 20:53:05,702 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:05,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:05,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1184750228, now seen corresponding path program 2 times [2024-06-03 20:53:05,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:05,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23550724] [2024-06-03 20:53:05,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:05,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:06,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:06,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23550724] [2024-06-03 20:53:06,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23550724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:06,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:06,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:06,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257901284] [2024-06-03 20:53:06,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:06,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:06,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:06,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:06,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:06,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:53:06,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 359 transitions, 4062 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) [2024-06-03 20:53:06,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:06,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:53:06,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:06,881 INFO L124 PetriNetUnfolderBase]: 2111/3736 cut-off events. [2024-06-03 20:53:06,882 INFO L125 PetriNetUnfolderBase]: For 372585/372585 co-relation queries the response was YES. [2024-06-03 20:53:06,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26568 conditions, 3736 events. 2111/3736 cut-off events. For 372585/372585 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 24640 event pairs, 418 based on Foata normal form. 1/3733 useless extension candidates. Maximal degree in co-relation 26431. Up to 3143 conditions per place. [2024-06-03 20:53:06,929 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 296 selfloop transitions, 84 changer transitions 0/389 dead transitions. [2024-06-03 20:53:06,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 389 transitions, 5376 flow [2024-06-03 20:53:06,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:53:06,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:53:06,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-03 20:53:06,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782828282828283 [2024-06-03 20:53:06,931 INFO L175 Difference]: Start difference. First operand has 320 places, 359 transitions, 4062 flow. Second operand 9 states and 229 transitions. [2024-06-03 20:53:06,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 389 transitions, 5376 flow [2024-06-03 20:53:08,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 389 transitions, 5229 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-03 20:53:08,798 INFO L231 Difference]: Finished difference. Result has 325 places, 365 transitions, 4221 flow [2024-06-03 20:53:08,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3951, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4221, PETRI_PLACES=325, PETRI_TRANSITIONS=365} [2024-06-03 20:53:08,799 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-03 20:53:08,799 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 365 transitions, 4221 flow [2024-06-03 20:53:08,799 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) [2024-06-03 20:53:08,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:08,800 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] [2024-06-03 20:53:08,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 20:53:08,800 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:08,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:08,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1193321108, now seen corresponding path program 3 times [2024-06-03 20:53:08,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:08,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883547529] [2024-06-03 20:53:08,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:08,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:09,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:09,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883547529] [2024-06-03 20:53:09,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883547529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:09,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:09,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:09,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515370173] [2024-06-03 20:53:09,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:09,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:09,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:09,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:09,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:09,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:53:09,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 365 transitions, 4221 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) [2024-06-03 20:53:09,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:09,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:53:09,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:10,033 INFO L124 PetriNetUnfolderBase]: 2108/3732 cut-off events. [2024-06-03 20:53:10,034 INFO L125 PetriNetUnfolderBase]: For 368177/368177 co-relation queries the response was YES. [2024-06-03 20:53:10,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26530 conditions, 3732 events. 2108/3732 cut-off events. For 368177/368177 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 24684 event pairs, 418 based on Foata normal form. 1/3729 useless extension candidates. Maximal degree in co-relation 26392. Up to 3140 conditions per place. [2024-06-03 20:53:10,080 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 292 selfloop transitions, 88 changer transitions 0/389 dead transitions. [2024-06-03 20:53:10,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 389 transitions, 5225 flow [2024-06-03 20:53:10,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:53:10,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:53:10,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-03 20:53:10,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5590909090909091 [2024-06-03 20:53:10,081 INFO L175 Difference]: Start difference. First operand has 325 places, 365 transitions, 4221 flow. Second operand 10 states and 246 transitions. [2024-06-03 20:53:10,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 389 transitions, 5225 flow [2024-06-03 20:53:11,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 389 transitions, 5003 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-03 20:53:11,784 INFO L231 Difference]: Finished difference. Result has 328 places, 365 transitions, 4187 flow [2024-06-03 20:53:11,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4001, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4187, PETRI_PLACES=328, PETRI_TRANSITIONS=365} [2024-06-03 20:53:11,787 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 283 predicate places. [2024-06-03 20:53:11,787 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 365 transitions, 4187 flow [2024-06-03 20:53:11,788 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) [2024-06-03 20:53:11,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:11,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:11,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 20:53:11,788 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:11,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:11,788 INFO L85 PathProgramCache]: Analyzing trace with hash 620029684, now seen corresponding path program 1 times [2024-06-03 20:53:11,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:11,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085248456] [2024-06-03 20:53:11,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:11,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:12,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:12,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085248456] [2024-06-03 20:53:12,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085248456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:12,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:12,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:12,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902058721] [2024-06-03 20:53:12,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:12,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:12,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:12,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:12,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:12,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:53:12,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 365 transitions, 4187 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) [2024-06-03 20:53:12,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:12,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:53:12,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:12,979 INFO L124 PetriNetUnfolderBase]: 2128/3766 cut-off events. [2024-06-03 20:53:12,980 INFO L125 PetriNetUnfolderBase]: For 390325/390325 co-relation queries the response was YES. [2024-06-03 20:53:13,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26736 conditions, 3766 events. 2128/3766 cut-off events. For 390325/390325 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 24842 event pairs, 342 based on Foata normal form. 6/3768 useless extension candidates. Maximal degree in co-relation 26598. Up to 3002 conditions per place. [2024-06-03 20:53:13,028 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 344 selfloop transitions, 43 changer transitions 0/396 dead transitions. [2024-06-03 20:53:13,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 396 transitions, 5307 flow [2024-06-03 20:53:13,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:53:13,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:53:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-03 20:53:13,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5974025974025974 [2024-06-03 20:53:13,029 INFO L175 Difference]: Start difference. First operand has 328 places, 365 transitions, 4187 flow. Second operand 7 states and 184 transitions. [2024-06-03 20:53:13,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 396 transitions, 5307 flow [2024-06-03 20:53:14,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 396 transitions, 5105 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-03 20:53:14,647 INFO L231 Difference]: Finished difference. Result has 325 places, 366 transitions, 4103 flow [2024-06-03 20:53:14,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3987, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4103, PETRI_PLACES=325, PETRI_TRANSITIONS=366} [2024-06-03 20:53:14,648 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-03 20:53:14,648 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 366 transitions, 4103 flow [2024-06-03 20:53:14,648 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) [2024-06-03 20:53:14,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:14,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:14,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 20:53:14,648 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:14,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:14,649 INFO L85 PathProgramCache]: Analyzing trace with hash 878317654, now seen corresponding path program 2 times [2024-06-03 20:53:14,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:14,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746412598] [2024-06-03 20:53:14,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:14,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:15,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:15,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746412598] [2024-06-03 20:53:15,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746412598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:15,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:15,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:15,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721748199] [2024-06-03 20:53:15,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:15,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:15,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:15,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:15,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:15,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:53:15,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 366 transitions, 4103 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) [2024-06-03 20:53:15,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:15,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:53:15,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:15,776 INFO L124 PetriNetUnfolderBase]: 2148/3802 cut-off events. [2024-06-03 20:53:15,776 INFO L125 PetriNetUnfolderBase]: For 391644/391644 co-relation queries the response was YES. [2024-06-03 20:53:15,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26973 conditions, 3802 events. 2148/3802 cut-off events. For 391644/391644 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 25178 event pairs, 422 based on Foata normal form. 6/3804 useless extension candidates. Maximal degree in co-relation 26835. Up to 3203 conditions per place. [2024-06-03 20:53:15,823 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 345 selfloop transitions, 38 changer transitions 0/392 dead transitions. [2024-06-03 20:53:15,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 392 transitions, 5019 flow [2024-06-03 20:53:15,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:53:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:53:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-03 20:53:15,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-03 20:53:15,825 INFO L175 Difference]: Start difference. First operand has 325 places, 366 transitions, 4103 flow. Second operand 7 states and 181 transitions. [2024-06-03 20:53:15,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 392 transitions, 5019 flow [2024-06-03 20:53:17,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 392 transitions, 4934 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 20:53:17,644 INFO L231 Difference]: Finished difference. Result has 328 places, 367 transitions, 4128 flow [2024-06-03 20:53:17,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4019, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4128, PETRI_PLACES=328, PETRI_TRANSITIONS=367} [2024-06-03 20:53:17,644 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 283 predicate places. [2024-06-03 20:53:17,644 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 367 transitions, 4128 flow [2024-06-03 20:53:17,645 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) [2024-06-03 20:53:17,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:17,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:17,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 20:53:17,645 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:17,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:17,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1394202132, now seen corresponding path program 7 times [2024-06-03 20:53:17,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:17,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582402733] [2024-06-03 20:53:17,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:17,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:18,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:18,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582402733] [2024-06-03 20:53:18,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582402733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:18,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:18,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:18,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664024291] [2024-06-03 20:53:18,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:18,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:18,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:18,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:18,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:18,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:53:18,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 367 transitions, 4128 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) [2024-06-03 20:53:18,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:18,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:53:18,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:18,819 INFO L124 PetriNetUnfolderBase]: 2169/3831 cut-off events. [2024-06-03 20:53:18,820 INFO L125 PetriNetUnfolderBase]: For 390860/390860 co-relation queries the response was YES. [2024-06-03 20:53:18,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27366 conditions, 3831 events. 2169/3831 cut-off events. For 390860/390860 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 25445 event pairs, 431 based on Foata normal form. 2/3822 useless extension candidates. Maximal degree in co-relation 27227. Up to 3179 conditions per place. [2024-06-03 20:53:18,948 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 310 selfloop transitions, 94 changer transitions 0/413 dead transitions. [2024-06-03 20:53:18,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 413 transitions, 5334 flow [2024-06-03 20:53:18,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:53:18,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:53:18,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-06-03 20:53:18,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863636363636363 [2024-06-03 20:53:18,949 INFO L175 Difference]: Start difference. First operand has 328 places, 367 transitions, 4128 flow. Second operand 10 states and 258 transitions. [2024-06-03 20:53:18,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 413 transitions, 5334 flow [2024-06-03 20:53:21,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 413 transitions, 5240 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 20:53:21,242 INFO L231 Difference]: Finished difference. Result has 334 places, 372 transitions, 4349 flow [2024-06-03 20:53:21,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4034, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4349, PETRI_PLACES=334, PETRI_TRANSITIONS=372} [2024-06-03 20:53:21,242 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 289 predicate places. [2024-06-03 20:53:21,242 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 372 transitions, 4349 flow [2024-06-03 20:53:21,242 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) [2024-06-03 20:53:21,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:21,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:21,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 20:53:21,243 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:21,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:21,243 INFO L85 PathProgramCache]: Analyzing trace with hash -701152326, now seen corresponding path program 8 times [2024-06-03 20:53:21,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:21,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148062997] [2024-06-03 20:53:21,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:21,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:21,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:21,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:21,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148062997] [2024-06-03 20:53:21,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148062997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:21,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:21,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:21,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649132406] [2024-06-03 20:53:21,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:21,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:21,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:21,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:21,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:21,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:53:21,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 372 transitions, 4349 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) [2024-06-03 20:53:21,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:21,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:53:21,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:22,392 INFO L124 PetriNetUnfolderBase]: 2177/3848 cut-off events. [2024-06-03 20:53:22,392 INFO L125 PetriNetUnfolderBase]: For 400339/400339 co-relation queries the response was YES. [2024-06-03 20:53:22,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27754 conditions, 3848 events. 2177/3848 cut-off events. For 400339/400339 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 25556 event pairs, 438 based on Foata normal form. 2/3844 useless extension candidates. Maximal degree in co-relation 27613. Up to 3226 conditions per place. [2024-06-03 20:53:22,440 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 309 selfloop transitions, 92 changer transitions 0/410 dead transitions. [2024-06-03 20:53:22,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 410 transitions, 5293 flow [2024-06-03 20:53:22,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:53:22,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:53:22,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-06-03 20:53:22,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-03 20:53:22,442 INFO L175 Difference]: Start difference. First operand has 334 places, 372 transitions, 4349 flow. Second operand 10 states and 253 transitions. [2024-06-03 20:53:22,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 410 transitions, 5293 flow [2024-06-03 20:53:24,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 410 transitions, 5074 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-03 20:53:24,785 INFO L231 Difference]: Finished difference. Result has 338 places, 374 transitions, 4375 flow [2024-06-03 20:53:24,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4160, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4375, PETRI_PLACES=338, PETRI_TRANSITIONS=374} [2024-06-03 20:53:24,785 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 293 predicate places. [2024-06-03 20:53:24,786 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 374 transitions, 4375 flow [2024-06-03 20:53:24,786 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) [2024-06-03 20:53:24,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:24,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:24,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 20:53:24,786 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:24,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:24,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1485399656, now seen corresponding path program 9 times [2024-06-03 20:53:24,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:24,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2687551] [2024-06-03 20:53:24,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:24,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:25,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:25,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2687551] [2024-06-03 20:53:25,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2687551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:25,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:25,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:25,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003341263] [2024-06-03 20:53:25,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:25,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:25,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:25,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:25,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:25,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:53:25,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 374 transitions, 4375 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) [2024-06-03 20:53:25,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:25,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:53:25,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:25,957 INFO L124 PetriNetUnfolderBase]: 2185/3860 cut-off events. [2024-06-03 20:53:25,957 INFO L125 PetriNetUnfolderBase]: For 406021/406021 co-relation queries the response was YES. [2024-06-03 20:53:25,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27787 conditions, 3860 events. 2185/3860 cut-off events. For 406021/406021 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 25622 event pairs, 438 based on Foata normal form. 2/3856 useless extension candidates. Maximal degree in co-relation 27644. Up to 3238 conditions per place. [2024-06-03 20:53:26,009 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 307 selfloop transitions, 94 changer transitions 0/410 dead transitions. [2024-06-03 20:53:26,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 410 transitions, 5287 flow [2024-06-03 20:53:26,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:53:26,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:53:26,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 269 transitions. [2024-06-03 20:53:26,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5557851239669421 [2024-06-03 20:53:26,011 INFO L175 Difference]: Start difference. First operand has 338 places, 374 transitions, 4375 flow. Second operand 11 states and 269 transitions. [2024-06-03 20:53:26,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 410 transitions, 5287 flow [2024-06-03 20:53:28,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 410 transitions, 5094 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 20:53:28,087 INFO L231 Difference]: Finished difference. Result has 341 places, 376 transitions, 4405 flow [2024-06-03 20:53:28,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4182, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4405, PETRI_PLACES=341, PETRI_TRANSITIONS=376} [2024-06-03 20:53:28,088 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 296 predicate places. [2024-06-03 20:53:28,088 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 376 transitions, 4405 flow [2024-06-03 20:53:28,088 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) [2024-06-03 20:53:28,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:28,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:28,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 20:53:28,088 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:28,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:28,089 INFO L85 PathProgramCache]: Analyzing trace with hash -459939432, now seen corresponding path program 10 times [2024-06-03 20:53:28,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:28,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074306792] [2024-06-03 20:53:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:28,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:28,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:28,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074306792] [2024-06-03 20:53:28,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074306792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:28,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:28,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:28,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617288493] [2024-06-03 20:53:28,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:28,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:28,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:28,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:28,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:28,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:53:28,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 376 transitions, 4405 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) [2024-06-03 20:53:28,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:28,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:53:28,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:29,186 INFO L124 PetriNetUnfolderBase]: 2193/3872 cut-off events. [2024-06-03 20:53:29,186 INFO L125 PetriNetUnfolderBase]: For 414037/414037 co-relation queries the response was YES. [2024-06-03 20:53:29,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27960 conditions, 3872 events. 2193/3872 cut-off events. For 414037/414037 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 25705 event pairs, 438 based on Foata normal form. 2/3868 useless extension candidates. Maximal degree in co-relation 27816. Up to 3250 conditions per place. [2024-06-03 20:53:29,234 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 303 selfloop transitions, 94 changer transitions 0/406 dead transitions. [2024-06-03 20:53:29,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 406 transitions, 5297 flow [2024-06-03 20:53:29,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:53:29,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:53:29,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 263 transitions. [2024-06-03 20:53:29,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5433884297520661 [2024-06-03 20:53:29,235 INFO L175 Difference]: Start difference. First operand has 341 places, 376 transitions, 4405 flow. Second operand 11 states and 263 transitions. [2024-06-03 20:53:29,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 406 transitions, 5297 flow [2024-06-03 20:53:31,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 406 transitions, 5096 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-03 20:53:31,267 INFO L231 Difference]: Finished difference. Result has 343 places, 378 transitions, 4431 flow [2024-06-03 20:53:31,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4204, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4431, PETRI_PLACES=343, PETRI_TRANSITIONS=378} [2024-06-03 20:53:31,267 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-03 20:53:31,267 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 378 transitions, 4431 flow [2024-06-03 20:53:31,267 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) [2024-06-03 20:53:31,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:31,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:31,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 20:53:31,268 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:31,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:31,268 INFO L85 PathProgramCache]: Analyzing trace with hash -962072358, now seen corresponding path program 4 times [2024-06-03 20:53:31,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:31,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071939053] [2024-06-03 20:53:31,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:31,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:31,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:31,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071939053] [2024-06-03 20:53:31,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071939053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:31,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:31,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:31,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636721785] [2024-06-03 20:53:31,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:31,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:31,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:31,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:31,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:31,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:53:31,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 378 transitions, 4431 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) [2024-06-03 20:53:31,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:31,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:53:31,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:32,412 INFO L124 PetriNetUnfolderBase]: 2209/3901 cut-off events. [2024-06-03 20:53:32,412 INFO L125 PetriNetUnfolderBase]: For 417396/417396 co-relation queries the response was YES. [2024-06-03 20:53:32,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28191 conditions, 3901 events. 2209/3901 cut-off events. For 417396/417396 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25955 event pairs, 439 based on Foata normal form. 1/3896 useless extension candidates. Maximal degree in co-relation 28046. Up to 3264 conditions per place. [2024-06-03 20:53:32,464 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 361 selfloop transitions, 52 changer transitions 0/422 dead transitions. [2024-06-03 20:53:32,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 422 transitions, 5443 flow [2024-06-03 20:53:32,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:53:32,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:53:32,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-06-03 20:53:32,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818181818181818 [2024-06-03 20:53:32,465 INFO L175 Difference]: Start difference. First operand has 343 places, 378 transitions, 4431 flow. Second operand 10 states and 256 transitions. [2024-06-03 20:53:32,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 422 transitions, 5443 flow [2024-06-03 20:53:34,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 422 transitions, 5238 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-03 20:53:34,940 INFO L231 Difference]: Finished difference. Result has 344 places, 384 transitions, 4432 flow [2024-06-03 20:53:34,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4226, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4432, PETRI_PLACES=344, PETRI_TRANSITIONS=384} [2024-06-03 20:53:34,941 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 299 predicate places. [2024-06-03 20:53:34,941 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 384 transitions, 4432 flow [2024-06-03 20:53:34,941 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) [2024-06-03 20:53:34,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:34,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:34,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 20:53:34,941 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:34,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:34,942 INFO L85 PathProgramCache]: Analyzing trace with hash -691892936, now seen corresponding path program 5 times [2024-06-03 20:53:34,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:34,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66108399] [2024-06-03 20:53:34,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:34,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:35,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:35,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66108399] [2024-06-03 20:53:35,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66108399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:35,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:35,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:35,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101045983] [2024-06-03 20:53:35,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:35,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:35,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:35,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:35,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:35,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:53:35,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 384 transitions, 4432 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) [2024-06-03 20:53:35,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:35,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:53:35,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:36,080 INFO L124 PetriNetUnfolderBase]: 2230/3933 cut-off events. [2024-06-03 20:53:36,080 INFO L125 PetriNetUnfolderBase]: For 437781/437781 co-relation queries the response was YES. [2024-06-03 20:53:36,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29051 conditions, 3933 events. 2230/3933 cut-off events. For 437781/437781 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 26227 event pairs, 445 based on Foata normal form. 1/3925 useless extension candidates. Maximal degree in co-relation 28905. Up to 3108 conditions per place. [2024-06-03 20:53:36,132 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 268 selfloop transitions, 158 changer transitions 0/435 dead transitions. [2024-06-03 20:53:36,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 435 transitions, 6452 flow [2024-06-03 20:53:36,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:53:36,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:53:36,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 264 transitions. [2024-06-03 20:53:36,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 20:53:36,134 INFO L175 Difference]: Start difference. First operand has 344 places, 384 transitions, 4432 flow. Second operand 10 states and 264 transitions. [2024-06-03 20:53:36,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 435 transitions, 6452 flow [2024-06-03 20:53:38,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 435 transitions, 6296 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-03 20:53:38,707 INFO L231 Difference]: Finished difference. Result has 347 places, 396 transitions, 4884 flow [2024-06-03 20:53:38,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4276, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4884, PETRI_PLACES=347, PETRI_TRANSITIONS=396} [2024-06-03 20:53:38,708 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 302 predicate places. [2024-06-03 20:53:38,708 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 396 transitions, 4884 flow [2024-06-03 20:53:38,708 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) [2024-06-03 20:53:38,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:38,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:38,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 20:53:38,709 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:38,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:38,709 INFO L85 PathProgramCache]: Analyzing trace with hash 751114912, now seen corresponding path program 6 times [2024-06-03 20:53:38,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:38,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209748011] [2024-06-03 20:53:38,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:38,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:39,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:39,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209748011] [2024-06-03 20:53:39,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209748011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:39,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:39,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:39,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271632896] [2024-06-03 20:53:39,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:39,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:39,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:39,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:39,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:39,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:53:39,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 396 transitions, 4884 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) [2024-06-03 20:53:39,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:39,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:53:39,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:39,958 INFO L124 PetriNetUnfolderBase]: 2235/3945 cut-off events. [2024-06-03 20:53:39,958 INFO L125 PetriNetUnfolderBase]: For 449656/449656 co-relation queries the response was YES. [2024-06-03 20:53:39,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29729 conditions, 3945 events. 2235/3945 cut-off events. For 449656/449656 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 26361 event pairs, 439 based on Foata normal form. 1/3940 useless extension candidates. Maximal degree in co-relation 29582. Up to 3287 conditions per place. [2024-06-03 20:53:40,010 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 369 selfloop transitions, 66 changer transitions 0/444 dead transitions. [2024-06-03 20:53:40,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 444 transitions, 6142 flow [2024-06-03 20:53:40,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:53:40,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:53:40,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 318 transitions. [2024-06-03 20:53:40,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5559440559440559 [2024-06-03 20:53:40,012 INFO L175 Difference]: Start difference. First operand has 347 places, 396 transitions, 4884 flow. Second operand 13 states and 318 transitions. [2024-06-03 20:53:40,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 444 transitions, 6142 flow [2024-06-03 20:53:42,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 444 transitions, 5844 flow, removed 101 selfloop flow, removed 3 redundant places. [2024-06-03 20:53:42,184 INFO L231 Difference]: Finished difference. Result has 358 places, 399 transitions, 4810 flow [2024-06-03 20:53:42,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4614, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4810, PETRI_PLACES=358, PETRI_TRANSITIONS=399} [2024-06-03 20:53:42,184 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 313 predicate places. [2024-06-03 20:53:42,184 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 399 transitions, 4810 flow [2024-06-03 20:53:42,184 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) [2024-06-03 20:53:42,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:42,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:42,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 20:53:42,185 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:42,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:42,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1426062648, now seen corresponding path program 7 times [2024-06-03 20:53:42,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:42,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857353188] [2024-06-03 20:53:42,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:42,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:42,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:42,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857353188] [2024-06-03 20:53:42,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857353188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:42,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:42,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:42,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291089239] [2024-06-03 20:53:42,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:42,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:42,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:42,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:42,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:42,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:53:42,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 399 transitions, 4810 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) [2024-06-03 20:53:42,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:42,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:53:42,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:43,389 INFO L124 PetriNetUnfolderBase]: 2232/3941 cut-off events. [2024-06-03 20:53:43,390 INFO L125 PetriNetUnfolderBase]: For 451416/451416 co-relation queries the response was YES. [2024-06-03 20:53:43,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29662 conditions, 3941 events. 2232/3941 cut-off events. For 451416/451416 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 26371 event pairs, 439 based on Foata normal form. 1/3936 useless extension candidates. Maximal degree in co-relation 29512. Up to 3284 conditions per place. [2024-06-03 20:53:43,439 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 363 selfloop transitions, 66 changer transitions 0/438 dead transitions. [2024-06-03 20:53:43,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 438 transitions, 5766 flow [2024-06-03 20:53:43,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:53:43,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:53:43,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 274 transitions. [2024-06-03 20:53:43,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661157024793388 [2024-06-03 20:53:43,440 INFO L175 Difference]: Start difference. First operand has 358 places, 399 transitions, 4810 flow. Second operand 11 states and 274 transitions. [2024-06-03 20:53:43,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 438 transitions, 5766 flow [2024-06-03 20:53:46,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 438 transitions, 5582 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-03 20:53:46,115 INFO L231 Difference]: Finished difference. Result has 359 places, 399 transitions, 4764 flow [2024-06-03 20:53:46,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4626, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4764, PETRI_PLACES=359, PETRI_TRANSITIONS=399} [2024-06-03 20:53:46,116 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 314 predicate places. [2024-06-03 20:53:46,116 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 399 transitions, 4764 flow [2024-06-03 20:53:46,116 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) [2024-06-03 20:53:46,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:46,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:46,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 20:53:46,116 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:46,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:46,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1706992952, now seen corresponding path program 8 times [2024-06-03 20:53:46,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:46,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527614512] [2024-06-03 20:53:46,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:46,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:46,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:46,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527614512] [2024-06-03 20:53:46,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527614512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:46,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:46,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:46,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566031166] [2024-06-03 20:53:46,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:46,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:46,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:46,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:46,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:46,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:53:46,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 399 transitions, 4764 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) [2024-06-03 20:53:46,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:46,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:53:46,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:47,270 INFO L124 PetriNetUnfolderBase]: 2245/3960 cut-off events. [2024-06-03 20:53:47,270 INFO L125 PetriNetUnfolderBase]: For 465237/465237 co-relation queries the response was YES. [2024-06-03 20:53:47,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29959 conditions, 3960 events. 2245/3960 cut-off events. For 465237/465237 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 26459 event pairs, 445 based on Foata normal form. 1/3952 useless extension candidates. Maximal degree in co-relation 29808. Up to 3126 conditions per place. [2024-06-03 20:53:47,322 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 259 selfloop transitions, 174 changer transitions 0/442 dead transitions. [2024-06-03 20:53:47,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 442 transitions, 6440 flow [2024-06-03 20:53:47,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:53:47,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:53:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 299 transitions. [2024-06-03 20:53:47,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5662878787878788 [2024-06-03 20:53:47,323 INFO L175 Difference]: Start difference. First operand has 359 places, 399 transitions, 4764 flow. Second operand 12 states and 299 transitions. [2024-06-03 20:53:47,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 442 transitions, 6440 flow [2024-06-03 20:53:50,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 442 transitions, 6308 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-03 20:53:50,567 INFO L231 Difference]: Finished difference. Result has 361 places, 405 transitions, 5094 flow [2024-06-03 20:53:50,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4632, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5094, PETRI_PLACES=361, PETRI_TRANSITIONS=405} [2024-06-03 20:53:50,568 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 316 predicate places. [2024-06-03 20:53:50,568 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 405 transitions, 5094 flow [2024-06-03 20:53:50,568 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) [2024-06-03 20:53:50,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:50,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:50,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 20:53:50,569 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:50,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:50,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1700326712, now seen corresponding path program 9 times [2024-06-03 20:53:50,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:50,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914842997] [2024-06-03 20:53:50,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:50,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:50,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:50,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914842997] [2024-06-03 20:53:50,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914842997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:50,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:50,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:50,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883498351] [2024-06-03 20:53:50,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:50,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:50,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:50,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:50,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:51,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:53:51,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 405 transitions, 5094 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) [2024-06-03 20:53:51,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:51,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:53:51,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:51,756 INFO L124 PetriNetUnfolderBase]: 2242/3956 cut-off events. [2024-06-03 20:53:51,757 INFO L125 PetriNetUnfolderBase]: For 469285/469285 co-relation queries the response was YES. [2024-06-03 20:53:51,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30129 conditions, 3956 events. 2242/3956 cut-off events. For 469285/469285 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 26476 event pairs, 445 based on Foata normal form. 1/3948 useless extension candidates. Maximal degree in co-relation 29977. Up to 3123 conditions per place. [2024-06-03 20:53:51,811 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 260 selfloop transitions, 171 changer transitions 0/440 dead transitions. [2024-06-03 20:53:51,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 440 transitions, 6454 flow [2024-06-03 20:53:51,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:53:51,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:53:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 279 transitions. [2024-06-03 20:53:51,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5764462809917356 [2024-06-03 20:53:51,813 INFO L175 Difference]: Start difference. First operand has 361 places, 405 transitions, 5094 flow. Second operand 11 states and 279 transitions. [2024-06-03 20:53:51,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 440 transitions, 6454 flow [2024-06-03 20:53:55,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 440 transitions, 6091 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-03 20:53:55,369 INFO L231 Difference]: Finished difference. Result has 364 places, 405 transitions, 5079 flow [2024-06-03 20:53:55,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4731, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5079, PETRI_PLACES=364, PETRI_TRANSITIONS=405} [2024-06-03 20:53:55,370 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 319 predicate places. [2024-06-03 20:53:55,370 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 405 transitions, 5079 flow [2024-06-03 20:53:55,370 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) [2024-06-03 20:53:55,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:55,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:55,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 20:53:55,372 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:55,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:55,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1394540466, now seen corresponding path program 4 times [2024-06-03 20:53:55,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:55,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552938127] [2024-06-03 20:53:55,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:55,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:55,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:55,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552938127] [2024-06-03 20:53:55,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552938127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:55,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:55,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:55,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342680574] [2024-06-03 20:53:55,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:55,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:55,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:55,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:55,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:55,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:53:55,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 405 transitions, 5079 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) [2024-06-03 20:53:55,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:55,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:53:55,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:56,638 INFO L124 PetriNetUnfolderBase]: 2255/3980 cut-off events. [2024-06-03 20:53:56,638 INFO L125 PetriNetUnfolderBase]: For 483816/483816 co-relation queries the response was YES. [2024-06-03 20:53:56,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30457 conditions, 3980 events. 2255/3980 cut-off events. For 483816/483816 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 26611 event pairs, 442 based on Foata normal form. 1/3973 useless extension candidates. Maximal degree in co-relation 30305. Up to 3211 conditions per place. [2024-06-03 20:53:56,686 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 290 selfloop transitions, 153 changer transitions 0/452 dead transitions. [2024-06-03 20:53:56,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 452 transitions, 6887 flow [2024-06-03 20:53:56,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:53:56,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:53:56,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-06-03 20:53:56,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5954545454545455 [2024-06-03 20:53:56,687 INFO L175 Difference]: Start difference. First operand has 364 places, 405 transitions, 5079 flow. Second operand 10 states and 262 transitions. [2024-06-03 20:53:56,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 452 transitions, 6887 flow [2024-06-03 20:53:59,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 452 transitions, 6573 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 20:53:59,522 INFO L231 Difference]: Finished difference. Result has 366 places, 414 transitions, 5287 flow [2024-06-03 20:53:59,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4765, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5287, PETRI_PLACES=366, PETRI_TRANSITIONS=414} [2024-06-03 20:53:59,523 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 321 predicate places. [2024-06-03 20:53:59,523 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 414 transitions, 5287 flow [2024-06-03 20:53:59,523 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) [2024-06-03 20:53:59,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:59,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:59,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 20:53:59,524 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:53:59,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:59,524 INFO L85 PathProgramCache]: Analyzing trace with hash -814859146, now seen corresponding path program 5 times [2024-06-03 20:53:59,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:59,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576153077] [2024-06-03 20:53:59,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:59,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:59,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:59,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576153077] [2024-06-03 20:53:59,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576153077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:59,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:59,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:59,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776643907] [2024-06-03 20:53:59,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:59,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:59,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:59,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:59,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:59,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:53:59,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 414 transitions, 5287 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) [2024-06-03 20:53:59,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:59,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:53:59,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:00,785 INFO L124 PetriNetUnfolderBase]: 2268/4002 cut-off events. [2024-06-03 20:54:00,785 INFO L125 PetriNetUnfolderBase]: For 500625/500625 co-relation queries the response was YES. [2024-06-03 20:54:00,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31066 conditions, 4002 events. 2268/4002 cut-off events. For 500625/500625 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 26821 event pairs, 442 based on Foata normal form. 1/3995 useless extension candidates. Maximal degree in co-relation 30913. Up to 3226 conditions per place. [2024-06-03 20:54:00,840 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 286 selfloop transitions, 161 changer transitions 0/456 dead transitions. [2024-06-03 20:54:00,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 456 transitions, 7047 flow [2024-06-03 20:54:00,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:54:00,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:54:00,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 280 transitions. [2024-06-03 20:54:00,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785123966942148 [2024-06-03 20:54:00,841 INFO L175 Difference]: Start difference. First operand has 366 places, 414 transitions, 5287 flow. Second operand 11 states and 280 transitions. [2024-06-03 20:54:00,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 456 transitions, 7047 flow [2024-06-03 20:54:04,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 456 transitions, 6689 flow, removed 101 selfloop flow, removed 5 redundant places. [2024-06-03 20:54:04,381 INFO L231 Difference]: Finished difference. Result has 372 places, 420 transitions, 5405 flow [2024-06-03 20:54:04,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4993, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5405, PETRI_PLACES=372, PETRI_TRANSITIONS=420} [2024-06-03 20:54:04,382 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 327 predicate places. [2024-06-03 20:54:04,382 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 420 transitions, 5405 flow [2024-06-03 20:54:04,382 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) [2024-06-03 20:54:04,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:04,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:04,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 20:54:04,383 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:54:04,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:04,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1713666136, now seen corresponding path program 6 times [2024-06-03 20:54:04,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:04,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848915556] [2024-06-03 20:54:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:04,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:04,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:04,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848915556] [2024-06-03 20:54:04,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848915556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:04,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:04,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:54:04,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114237291] [2024-06-03 20:54:04,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:04,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:54:04,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:04,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:54:04,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:54:04,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:54:04,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 420 transitions, 5405 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) [2024-06-03 20:54:04,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:04,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:54:04,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:05,561 INFO L124 PetriNetUnfolderBase]: 2265/3998 cut-off events. [2024-06-03 20:54:05,561 INFO L125 PetriNetUnfolderBase]: For 502822/502822 co-relation queries the response was YES. [2024-06-03 20:54:05,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31028 conditions, 3998 events. 2265/3998 cut-off events. For 502822/502822 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 26796 event pairs, 442 based on Foata normal form. 1/3991 useless extension candidates. Maximal degree in co-relation 30874. Up to 3223 conditions per place. [2024-06-03 20:54:05,618 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 283 selfloop transitions, 164 changer transitions 0/456 dead transitions. [2024-06-03 20:54:05,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 456 transitions, 6811 flow [2024-06-03 20:54:05,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:54:05,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:54:05,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 296 transitions. [2024-06-03 20:54:05,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-06-03 20:54:05,619 INFO L175 Difference]: Start difference. First operand has 372 places, 420 transitions, 5405 flow. Second operand 12 states and 296 transitions. [2024-06-03 20:54:05,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 456 transitions, 6811 flow [2024-06-03 20:54:09,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 456 transitions, 6501 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 20:54:09,254 INFO L231 Difference]: Finished difference. Result has 378 places, 420 transitions, 5429 flow [2024-06-03 20:54:09,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5095, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5429, PETRI_PLACES=378, PETRI_TRANSITIONS=420} [2024-06-03 20:54:09,255 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 333 predicate places. [2024-06-03 20:54:09,255 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 420 transitions, 5429 flow [2024-06-03 20:54:09,255 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) [2024-06-03 20:54:09,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:09,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:09,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 20:54:09,255 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:54:09,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:09,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1879354474, now seen corresponding path program 10 times [2024-06-03 20:54:09,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:09,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642847413] [2024-06-03 20:54:09,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:09,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:09,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:09,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642847413] [2024-06-03 20:54:09,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642847413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:09,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:09,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:54:09,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748578985] [2024-06-03 20:54:09,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:09,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:54:09,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:09,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:54:09,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:54:09,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:54:09,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 420 transitions, 5429 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) [2024-06-03 20:54:09,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:09,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:54:09,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:10,555 INFO L124 PetriNetUnfolderBase]: 2286/4031 cut-off events. [2024-06-03 20:54:10,555 INFO L125 PetriNetUnfolderBase]: For 523831/523831 co-relation queries the response was YES. [2024-06-03 20:54:10,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31586 conditions, 4031 events. 2286/4031 cut-off events. For 523831/523831 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 27077 event pairs, 445 based on Foata normal form. 1/4023 useless extension candidates. Maximal degree in co-relation 31431. Up to 3179 conditions per place. [2024-06-03 20:54:10,603 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 266 selfloop transitions, 184 changer transitions 0/459 dead transitions. [2024-06-03 20:54:10,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 459 transitions, 7211 flow [2024-06-03 20:54:10,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:54:10,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:54:10,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 274 transitions. [2024-06-03 20:54:10,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661157024793388 [2024-06-03 20:54:10,611 INFO L175 Difference]: Start difference. First operand has 378 places, 420 transitions, 5429 flow. Second operand 11 states and 274 transitions. [2024-06-03 20:54:10,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 459 transitions, 7211 flow [2024-06-03 20:54:13,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 459 transitions, 6883 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-03 20:54:13,762 INFO L231 Difference]: Finished difference. Result has 379 places, 429 transitions, 5643 flow [2024-06-03 20:54:13,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5101, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5643, PETRI_PLACES=379, PETRI_TRANSITIONS=429} [2024-06-03 20:54:13,762 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 334 predicate places. [2024-06-03 20:54:13,762 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 429 transitions, 5643 flow [2024-06-03 20:54:13,763 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) [2024-06-03 20:54:13,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:13,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:13,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 20:54:13,763 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:54:13,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:13,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1707049100, now seen corresponding path program 11 times [2024-06-03 20:54:13,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:13,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512692120] [2024-06-03 20:54:13,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:13,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:14,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:14,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512692120] [2024-06-03 20:54:14,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512692120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:14,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:14,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:54:14,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901583245] [2024-06-03 20:54:14,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:14,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:54:14,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:14,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:54:14,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:54:14,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:54:14,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 429 transitions, 5643 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) [2024-06-03 20:54:14,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:14,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:54:14,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:14,926 INFO L124 PetriNetUnfolderBase]: 2283/4027 cut-off events. [2024-06-03 20:54:14,926 INFO L125 PetriNetUnfolderBase]: For 527531/527531 co-relation queries the response was YES. [2024-06-03 20:54:14,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31609 conditions, 4027 events. 2283/4027 cut-off events. For 527531/527531 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 27058 event pairs, 445 based on Foata normal form. 1/4019 useless extension candidates. Maximal degree in co-relation 31453. Up to 3176 conditions per place. [2024-06-03 20:54:14,981 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 264 selfloop transitions, 186 changer transitions 0/459 dead transitions. [2024-06-03 20:54:14,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 459 transitions, 7047 flow [2024-06-03 20:54:14,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:54:14,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:54:14,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 290 transitions. [2024-06-03 20:54:14,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5492424242424242 [2024-06-03 20:54:14,983 INFO L175 Difference]: Start difference. First operand has 379 places, 429 transitions, 5643 flow. Second operand 12 states and 290 transitions. [2024-06-03 20:54:14,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 459 transitions, 7047 flow [2024-06-03 20:54:18,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 459 transitions, 6742 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-03 20:54:18,827 INFO L231 Difference]: Finished difference. Result has 386 places, 429 transitions, 5716 flow [2024-06-03 20:54:18,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5338, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5716, PETRI_PLACES=386, PETRI_TRANSITIONS=429} [2024-06-03 20:54:18,828 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 341 predicate places. [2024-06-03 20:54:18,828 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 429 transitions, 5716 flow [2024-06-03 20:54:18,828 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) [2024-06-03 20:54:18,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:18,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:18,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 20:54:18,829 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:54:18,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:18,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1700375916, now seen corresponding path program 7 times [2024-06-03 20:54:18,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:18,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056131845] [2024-06-03 20:54:18,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:18,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:19,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:19,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:19,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056131845] [2024-06-03 20:54:19,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056131845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:19,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:19,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:54:19,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424990989] [2024-06-03 20:54:19,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:19,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:54:19,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:19,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:54:19,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:54:19,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:54:19,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 429 transitions, 5716 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) [2024-06-03 20:54:19,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:19,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:54:19,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:19,991 INFO L124 PetriNetUnfolderBase]: 2312/4077 cut-off events. [2024-06-03 20:54:19,992 INFO L125 PetriNetUnfolderBase]: For 555661/555661 co-relation queries the response was YES. [2024-06-03 20:54:20,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32368 conditions, 4077 events. 2312/4077 cut-off events. For 555661/555661 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 27444 event pairs, 442 based on Foata normal form. 1/4070 useless extension candidates. Maximal degree in co-relation 32211. Up to 3281 conditions per place. [2024-06-03 20:54:20,051 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 293 selfloop transitions, 171 changer transitions 0/473 dead transitions. [2024-06-03 20:54:20,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 473 transitions, 7787 flow [2024-06-03 20:54:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:54:20,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:54:20,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 294 transitions. [2024-06-03 20:54:20,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-03 20:54:20,052 INFO L175 Difference]: Start difference. First operand has 386 places, 429 transitions, 5716 flow. Second operand 12 states and 294 transitions. [2024-06-03 20:54:20,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 473 transitions, 7787 flow [2024-06-03 20:54:23,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 473 transitions, 7471 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-03 20:54:23,663 INFO L231 Difference]: Finished difference. Result has 389 places, 441 transitions, 5943 flow [2024-06-03 20:54:23,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5400, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5943, PETRI_PLACES=389, PETRI_TRANSITIONS=441} [2024-06-03 20:54:23,664 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 344 predicate places. [2024-06-03 20:54:23,664 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 441 transitions, 5943 flow [2024-06-03 20:54:23,664 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) [2024-06-03 20:54:23,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:23,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:23,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 20:54:23,665 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:54:23,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:23,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1713708396, now seen corresponding path program 8 times [2024-06-03 20:54:23,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:23,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222848417] [2024-06-03 20:54:23,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:23,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:24,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:24,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222848417] [2024-06-03 20:54:24,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222848417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:24,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:24,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:54:24,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516051655] [2024-06-03 20:54:24,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:24,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:54:24,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:24,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:54:24,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:54:24,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:54:24,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 441 transitions, 5943 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) [2024-06-03 20:54:24,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:24,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:54:24,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:24,857 INFO L124 PetriNetUnfolderBase]: 2309/4073 cut-off events. [2024-06-03 20:54:24,857 INFO L125 PetriNetUnfolderBase]: For 559399/559399 co-relation queries the response was YES. [2024-06-03 20:54:24,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32311 conditions, 4073 events. 2309/4073 cut-off events. For 559399/559399 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 27437 event pairs, 442 based on Foata normal form. 1/4066 useless extension candidates. Maximal degree in co-relation 32153. Up to 3278 conditions per place. [2024-06-03 20:54:24,926 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 293 selfloop transitions, 169 changer transitions 0/471 dead transitions. [2024-06-03 20:54:24,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 471 transitions, 7599 flow [2024-06-03 20:54:24,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:54:24,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:54:24,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 274 transitions. [2024-06-03 20:54:24,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661157024793388 [2024-06-03 20:54:24,928 INFO L175 Difference]: Start difference. First operand has 389 places, 441 transitions, 5943 flow. Second operand 11 states and 274 transitions. [2024-06-03 20:54:24,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 471 transitions, 7599 flow [2024-06-03 20:54:28,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 471 transitions, 7309 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 20:54:28,263 INFO L231 Difference]: Finished difference. Result has 394 places, 441 transitions, 5997 flow [2024-06-03 20:54:28,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5653, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5997, PETRI_PLACES=394, PETRI_TRANSITIONS=441} [2024-06-03 20:54:28,263 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 349 predicate places. [2024-06-03 20:54:28,263 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 441 transitions, 5997 flow [2024-06-03 20:54:28,263 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) [2024-06-03 20:54:28,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:28,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:28,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 20:54:28,264 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:54:28,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:28,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2058336458, now seen corresponding path program 9 times [2024-06-03 20:54:28,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:28,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990951747] [2024-06-03 20:54:28,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:28,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:28,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:28,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990951747] [2024-06-03 20:54:28,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990951747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:28,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:28,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:54:28,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302945294] [2024-06-03 20:54:28,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:28,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:54:28,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:28,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:54:28,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:54:28,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:54:28,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 441 transitions, 5997 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) [2024-06-03 20:54:28,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:28,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:54:28,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:29,480 INFO L124 PetriNetUnfolderBase]: 2306/4069 cut-off events. [2024-06-03 20:54:29,480 INFO L125 PetriNetUnfolderBase]: For 563240/563240 co-relation queries the response was YES. [2024-06-03 20:54:29,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32271 conditions, 4069 events. 2306/4069 cut-off events. For 563240/563240 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 27446 event pairs, 442 based on Foata normal form. 1/4062 useless extension candidates. Maximal degree in co-relation 32112. Up to 3275 conditions per place. [2024-06-03 20:54:29,540 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 284 selfloop transitions, 178 changer transitions 0/471 dead transitions. [2024-06-03 20:54:29,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 471 transitions, 7437 flow [2024-06-03 20:54:29,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:54:29,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:54:29,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 290 transitions. [2024-06-03 20:54:29,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5492424242424242 [2024-06-03 20:54:29,542 INFO L175 Difference]: Start difference. First operand has 394 places, 441 transitions, 5997 flow. Second operand 12 states and 290 transitions. [2024-06-03 20:54:29,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 471 transitions, 7437 flow [2024-06-03 20:54:32,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 471 transitions, 7145 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 20:54:32,799 INFO L231 Difference]: Finished difference. Result has 400 places, 441 transitions, 6067 flow [2024-06-03 20:54:32,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5705, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6067, PETRI_PLACES=400, PETRI_TRANSITIONS=441} [2024-06-03 20:54:32,799 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 355 predicate places. [2024-06-03 20:54:32,799 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 441 transitions, 6067 flow [2024-06-03 20:54:32,799 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) [2024-06-03 20:54:32,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:32,800 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] [2024-06-03 20:54:32,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 20:54:32,800 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:54:32,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:32,800 INFO L85 PathProgramCache]: Analyzing trace with hash 692610712, now seen corresponding path program 1 times [2024-06-03 20:54:32,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:32,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038910744] [2024-06-03 20:54:32,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:32,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:33,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:33,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038910744] [2024-06-03 20:54:33,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038910744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:33,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:33,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:33,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175241019] [2024-06-03 20:54:33,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:33,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:33,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:33,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:33,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:33,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:54:33,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 441 transitions, 6067 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) [2024-06-03 20:54:33,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:33,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:54:33,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:34,029 INFO L124 PetriNetUnfolderBase]: 2327/4094 cut-off events. [2024-06-03 20:54:34,029 INFO L125 PetriNetUnfolderBase]: For 593063/593063 co-relation queries the response was YES. [2024-06-03 20:54:34,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32882 conditions, 4094 events. 2327/4094 cut-off events. For 593063/593063 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 27582 event pairs, 429 based on Foata normal form. 2/4088 useless extension candidates. Maximal degree in co-relation 32722. Up to 3487 conditions per place. [2024-06-03 20:54:34,089 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 433 selfloop transitions, 34 changer transitions 0/476 dead transitions. [2024-06-03 20:54:34,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 476 transitions, 7393 flow [2024-06-03 20:54:34,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:54:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:54:34,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-03 20:54:34,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5656565656565656 [2024-06-03 20:54:34,090 INFO L175 Difference]: Start difference. First operand has 400 places, 441 transitions, 6067 flow. Second operand 9 states and 224 transitions. [2024-06-03 20:54:34,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 476 transitions, 7393 flow [2024-06-03 20:54:37,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 476 transitions, 7026 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-03 20:54:37,654 INFO L231 Difference]: Finished difference. Result has 398 places, 445 transitions, 5869 flow [2024-06-03 20:54:37,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5700, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5869, PETRI_PLACES=398, PETRI_TRANSITIONS=445} [2024-06-03 20:54:37,654 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 353 predicate places. [2024-06-03 20:54:37,654 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 445 transitions, 5869 flow [2024-06-03 20:54:37,655 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) [2024-06-03 20:54:37,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:37,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:37,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 20:54:37,655 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:54:37,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:37,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1091917736, now seen corresponding path program 2 times [2024-06-03 20:54:37,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:37,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85996904] [2024-06-03 20:54:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:37,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:38,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:38,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85996904] [2024-06-03 20:54:38,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85996904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:38,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:38,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:38,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890517882] [2024-06-03 20:54:38,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:38,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:38,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:38,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:38,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:38,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:54:38,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 445 transitions, 5869 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) [2024-06-03 20:54:38,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:38,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:54:38,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:38,862 INFO L124 PetriNetUnfolderBase]: 2322/4094 cut-off events. [2024-06-03 20:54:38,862 INFO L125 PetriNetUnfolderBase]: For 589134/589134 co-relation queries the response was YES. [2024-06-03 20:54:38,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32505 conditions, 4094 events. 2322/4094 cut-off events. For 589134/589134 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 27608 event pairs, 437 based on Foata normal form. 2/4090 useless extension candidates. Maximal degree in co-relation 32344. Up to 3509 conditions per place. [2024-06-03 20:54:38,925 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 431 selfloop transitions, 30 changer transitions 0/470 dead transitions. [2024-06-03 20:54:38,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 470 transitions, 6853 flow [2024-06-03 20:54:38,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:54:38,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:54:38,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-03 20:54:38,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-03 20:54:38,927 INFO L175 Difference]: Start difference. First operand has 398 places, 445 transitions, 5869 flow. Second operand 8 states and 199 transitions. [2024-06-03 20:54:38,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 470 transitions, 6853 flow [2024-06-03 20:54:42,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 470 transitions, 6697 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-03 20:54:42,468 INFO L231 Difference]: Finished difference. Result has 400 places, 445 transitions, 5778 flow [2024-06-03 20:54:42,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5713, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5778, PETRI_PLACES=400, PETRI_TRANSITIONS=445} [2024-06-03 20:54:42,469 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 355 predicate places. [2024-06-03 20:54:42,469 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 445 transitions, 5778 flow [2024-06-03 20:54:42,469 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) [2024-06-03 20:54:42,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:42,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:42,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 20:54:42,469 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:54:42,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:42,470 INFO L85 PathProgramCache]: Analyzing trace with hash -808190922, now seen corresponding path program 3 times [2024-06-03 20:54:42,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:42,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121112268] [2024-06-03 20:54:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:42,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:42,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:42,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121112268] [2024-06-03 20:54:42,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121112268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:42,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:42,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:42,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831615202] [2024-06-03 20:54:42,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:42,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:42,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:42,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:42,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:42,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:54:42,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 445 transitions, 5778 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) [2024-06-03 20:54:42,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:42,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:54:42,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:43,625 INFO L124 PetriNetUnfolderBase]: 2330/4103 cut-off events. [2024-06-03 20:54:43,625 INFO L125 PetriNetUnfolderBase]: For 599165/599165 co-relation queries the response was YES. [2024-06-03 20:54:43,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32611 conditions, 4103 events. 2330/4103 cut-off events. For 599165/599165 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 27706 event pairs, 443 based on Foata normal form. 2/4096 useless extension candidates. Maximal degree in co-relation 32448. Up to 3446 conditions per place. [2024-06-03 20:54:43,684 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 371 selfloop transitions, 89 changer transitions 0/469 dead transitions. [2024-06-03 20:54:43,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 469 transitions, 6802 flow [2024-06-03 20:54:43,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:54:43,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:54:43,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-03 20:54:43,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710227272727273 [2024-06-03 20:54:43,686 INFO L175 Difference]: Start difference. First operand has 400 places, 445 transitions, 5778 flow. Second operand 8 states and 201 transitions. [2024-06-03 20:54:43,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 469 transitions, 6802 flow [2024-06-03 20:54:47,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 469 transitions, 6743 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-03 20:54:47,622 INFO L231 Difference]: Finished difference. Result has 402 places, 447 transitions, 5956 flow [2024-06-03 20:54:47,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5719, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5956, PETRI_PLACES=402, PETRI_TRANSITIONS=447} [2024-06-03 20:54:47,622 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 357 predicate places. [2024-06-03 20:54:47,622 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 447 transitions, 5956 flow [2024-06-03 20:54:47,623 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) [2024-06-03 20:54:47,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:47,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:47,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 20:54:47,623 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:54:47,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:47,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1426076536, now seen corresponding path program 1 times [2024-06-03 20:54:47,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:47,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383600469] [2024-06-03 20:54:47,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:47,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:48,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:48,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383600469] [2024-06-03 20:54:48,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383600469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:48,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:48,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:48,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097285620] [2024-06-03 20:54:48,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:48,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:48,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:48,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:48,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:48,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:54:48,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 447 transitions, 5956 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) [2024-06-03 20:54:48,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:48,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:54:48,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:48,854 INFO L124 PetriNetUnfolderBase]: 2335/4115 cut-off events. [2024-06-03 20:54:48,854 INFO L125 PetriNetUnfolderBase]: For 603656/603656 co-relation queries the response was YES. [2024-06-03 20:54:48,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33005 conditions, 4115 events. 2335/4115 cut-off events. For 603656/603656 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 27762 event pairs, 436 based on Foata normal form. 1/4110 useless extension candidates. Maximal degree in co-relation 32841. Up to 3531 conditions per place. [2024-06-03 20:54:48,914 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 434 selfloop transitions, 31 changer transitions 0/474 dead transitions. [2024-06-03 20:54:48,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 474 transitions, 7014 flow [2024-06-03 20:54:48,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:54:48,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:54:48,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-03 20:54:48,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-03 20:54:48,915 INFO L175 Difference]: Start difference. First operand has 402 places, 447 transitions, 5956 flow. Second operand 8 states and 199 transitions. [2024-06-03 20:54:48,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 474 transitions, 7014 flow [2024-06-03 20:54:53,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 474 transitions, 6793 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-03 20:54:53,449 INFO L231 Difference]: Finished difference. Result has 404 places, 450 transitions, 5877 flow [2024-06-03 20:54:53,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5735, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5877, PETRI_PLACES=404, PETRI_TRANSITIONS=450} [2024-06-03 20:54:53,450 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 359 predicate places. [2024-06-03 20:54:53,450 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 450 transitions, 5877 flow [2024-06-03 20:54:53,450 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) [2024-06-03 20:54:53,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:53,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:53,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 20:54:53,450 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:54:53,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:53,451 INFO L85 PathProgramCache]: Analyzing trace with hash -808185962, now seen corresponding path program 2 times [2024-06-03 20:54:53,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:53,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000339090] [2024-06-03 20:54:53,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:53,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:53,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:53,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000339090] [2024-06-03 20:54:53,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000339090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:53,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:53,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:53,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744222253] [2024-06-03 20:54:53,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:53,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:53,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:53,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:53,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:53,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:54:53,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 450 transitions, 5877 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) [2024-06-03 20:54:53,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:53,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:54:53,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:54,718 INFO L124 PetriNetUnfolderBase]: 2356/4144 cut-off events. [2024-06-03 20:54:54,718 INFO L125 PetriNetUnfolderBase]: For 627834/627834 co-relation queries the response was YES. [2024-06-03 20:54:54,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33730 conditions, 4144 events. 2356/4144 cut-off events. For 627834/627834 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 28026 event pairs, 449 based on Foata normal form. 1/4133 useless extension candidates. Maximal degree in co-relation 33565. Up to 3354 conditions per place. [2024-06-03 20:54:54,768 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 349 selfloop transitions, 128 changer transitions 0/486 dead transitions. [2024-06-03 20:54:54,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 486 transitions, 7881 flow [2024-06-03 20:54:54,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:54:54,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:54:54,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-03 20:54:54,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-03 20:54:54,770 INFO L175 Difference]: Start difference. First operand has 404 places, 450 transitions, 5877 flow. Second operand 8 states and 209 transitions. [2024-06-03 20:54:54,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 486 transitions, 7881 flow [2024-06-03 20:54:59,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 486 transitions, 7761 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 20:54:59,069 INFO L231 Difference]: Finished difference. Result has 406 places, 462 transitions, 6321 flow [2024-06-03 20:54:59,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5757, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6321, PETRI_PLACES=406, PETRI_TRANSITIONS=462} [2024-06-03 20:54:59,069 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 361 predicate places. [2024-06-03 20:54:59,069 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 462 transitions, 6321 flow [2024-06-03 20:54:59,069 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) [2024-06-03 20:54:59,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:59,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:59,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 20:54:59,070 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:54:59,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:59,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1713673080, now seen corresponding path program 3 times [2024-06-03 20:54:59,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:59,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261294772] [2024-06-03 20:54:59,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:59,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:59,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:59,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261294772] [2024-06-03 20:54:59,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261294772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:59,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:59,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:54:59,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236661478] [2024-06-03 20:54:59,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:59,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:54:59,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:59,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:54:59,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:54:59,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:54:59,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 462 transitions, 6321 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) [2024-06-03 20:54:59,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:59,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:54:59,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:00,230 INFO L124 PetriNetUnfolderBase]: 2353/4140 cut-off events. [2024-06-03 20:55:00,230 INFO L125 PetriNetUnfolderBase]: For 634563/634563 co-relation queries the response was YES. [2024-06-03 20:55:00,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34071 conditions, 4140 events. 2353/4140 cut-off events. For 634563/634563 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 27955 event pairs, 449 based on Foata normal form. 1/4129 useless extension candidates. Maximal degree in co-relation 33905. Up to 3351 conditions per place. [2024-06-03 20:55:00,293 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 347 selfloop transitions, 129 changer transitions 0/485 dead transitions. [2024-06-03 20:55:00,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 485 transitions, 7797 flow [2024-06-03 20:55:00,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:55:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:55:00,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-03 20:55:00,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880681818181818 [2024-06-03 20:55:00,294 INFO L175 Difference]: Start difference. First operand has 406 places, 462 transitions, 6321 flow. Second operand 8 states and 207 transitions. [2024-06-03 20:55:00,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 485 transitions, 7797 flow [2024-06-03 20:55:04,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 485 transitions, 7608 flow, removed 73 selfloop flow, removed 2 redundant places. [2024-06-03 20:55:04,433 INFO L231 Difference]: Finished difference. Result has 412 places, 462 transitions, 6396 flow [2024-06-03 20:55:04,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6132, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6396, PETRI_PLACES=412, PETRI_TRANSITIONS=462} [2024-06-03 20:55:04,433 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 367 predicate places. [2024-06-03 20:55:04,433 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 462 transitions, 6396 flow [2024-06-03 20:55:04,433 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) [2024-06-03 20:55:04,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:04,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:04,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 20:55:04,434 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:55:04,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:04,434 INFO L85 PathProgramCache]: Analyzing trace with hash -801510794, now seen corresponding path program 1 times [2024-06-03 20:55:04,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:04,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729942734] [2024-06-03 20:55:04,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:04,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:04,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:04,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:04,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729942734] [2024-06-03 20:55:04,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729942734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:04,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:04,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:55:04,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407095762] [2024-06-03 20:55:04,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:04,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:55:04,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:04,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:55:04,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:55:04,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:55:04,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 462 transitions, 6396 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) [2024-06-03 20:55:04,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:04,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:55:04,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:05,613 INFO L124 PetriNetUnfolderBase]: 2361/4157 cut-off events. [2024-06-03 20:55:05,613 INFO L125 PetriNetUnfolderBase]: For 652167/652167 co-relation queries the response was YES. [2024-06-03 20:55:05,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34452 conditions, 4157 events. 2361/4157 cut-off events. For 652167/652167 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 28077 event pairs, 439 based on Foata normal form. 2/4151 useless extension candidates. Maximal degree in co-relation 34284. Up to 3514 conditions per place. [2024-06-03 20:55:05,674 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 386 selfloop transitions, 91 changer transitions 0/486 dead transitions. [2024-06-03 20:55:05,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 486 transitions, 7462 flow [2024-06-03 20:55:05,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:55:05,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:55:05,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-03 20:55:05,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-03 20:55:05,676 INFO L175 Difference]: Start difference. First operand has 412 places, 462 transitions, 6396 flow. Second operand 8 states and 200 transitions. [2024-06-03 20:55:05,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 486 transitions, 7462 flow [2024-06-03 20:55:10,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 486 transitions, 7192 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:55:10,243 INFO L231 Difference]: Finished difference. Result has 413 places, 464 transitions, 6375 flow [2024-06-03 20:55:10,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6126, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6375, PETRI_PLACES=413, PETRI_TRANSITIONS=464} [2024-06-03 20:55:10,244 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 368 predicate places. [2024-06-03 20:55:10,244 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 464 transitions, 6375 flow [2024-06-03 20:55:10,244 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) [2024-06-03 20:55:10,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:10,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:10,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 20:55:10,245 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:55:10,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:10,245 INFO L85 PathProgramCache]: Analyzing trace with hash -863469544, now seen corresponding path program 4 times [2024-06-03 20:55:10,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:10,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442802528] [2024-06-03 20:55:10,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:10,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:10,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:10,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442802528] [2024-06-03 20:55:10,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442802528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:10,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:10,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:55:10,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15684795] [2024-06-03 20:55:10,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:10,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:55:10,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:10,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:55:10,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:55:10,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:55:10,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 464 transitions, 6375 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) [2024-06-03 20:55:10,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:10,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:55:10,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:11,548 INFO L124 PetriNetUnfolderBase]: 2369/4171 cut-off events. [2024-06-03 20:55:11,548 INFO L125 PetriNetUnfolderBase]: For 663083/663083 co-relation queries the response was YES. [2024-06-03 20:55:11,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34679 conditions, 4171 events. 2369/4171 cut-off events. For 663083/663083 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 28194 event pairs, 444 based on Foata normal form. 2/4164 useless extension candidates. Maximal degree in co-relation 34510. Up to 3502 conditions per place. [2024-06-03 20:55:11,605 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 385 selfloop transitions, 91 changer transitions 0/485 dead transitions. [2024-06-03 20:55:11,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 485 transitions, 7433 flow [2024-06-03 20:55:11,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:55:11,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:55:11,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-03 20:55:11,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596590909090909 [2024-06-03 20:55:11,606 INFO L175 Difference]: Start difference. First operand has 413 places, 464 transitions, 6375 flow. Second operand 8 states and 197 transitions. [2024-06-03 20:55:11,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 485 transitions, 7433 flow [2024-06-03 20:55:16,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 485 transitions, 7200 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 20:55:16,614 INFO L231 Difference]: Finished difference. Result has 415 places, 466 transitions, 6393 flow [2024-06-03 20:55:16,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6142, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6393, PETRI_PLACES=415, PETRI_TRANSITIONS=466} [2024-06-03 20:55:16,615 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 370 predicate places. [2024-06-03 20:55:16,615 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 466 transitions, 6393 flow [2024-06-03 20:55:16,615 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) [2024-06-03 20:55:16,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:16,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:16,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 20:55:16,616 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:55:16,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:16,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1700368972, now seen corresponding path program 4 times [2024-06-03 20:55:16,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:16,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944019964] [2024-06-03 20:55:16,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:16,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:16,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:16,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944019964] [2024-06-03 20:55:16,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944019964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:16,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:16,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:55:16,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981390880] [2024-06-03 20:55:16,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:16,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:55:16,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:16,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:55:16,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:55:16,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:55:16,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 466 transitions, 6393 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) [2024-06-03 20:55:16,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:16,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:55:16,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:17,768 INFO L124 PetriNetUnfolderBase]: 2398/4216 cut-off events. [2024-06-03 20:55:17,768 INFO L125 PetriNetUnfolderBase]: For 689433/689433 co-relation queries the response was YES. [2024-06-03 20:55:17,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35583 conditions, 4216 events. 2398/4216 cut-off events. For 689433/689433 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 28587 event pairs, 451 based on Foata normal form. 1/4205 useless extension candidates. Maximal degree in co-relation 35413. Up to 3408 conditions per place. [2024-06-03 20:55:17,831 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 351 selfloop transitions, 140 changer transitions 0/500 dead transitions. [2024-06-03 20:55:17,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 500 transitions, 8669 flow [2024-06-03 20:55:17,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:55:17,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:55:17,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-03 20:55:17,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880681818181818 [2024-06-03 20:55:17,832 INFO L175 Difference]: Start difference. First operand has 415 places, 466 transitions, 6393 flow. Second operand 8 states and 207 transitions. [2024-06-03 20:55:17,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 500 transitions, 8669 flow [2024-06-03 20:55:22,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 500 transitions, 8434 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-03 20:55:22,571 INFO L231 Difference]: Finished difference. Result has 417 places, 478 transitions, 6726 flow [2024-06-03 20:55:22,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6158, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6726, PETRI_PLACES=417, PETRI_TRANSITIONS=478} [2024-06-03 20:55:22,572 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 372 predicate places. [2024-06-03 20:55:22,572 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 478 transitions, 6726 flow [2024-06-03 20:55:22,572 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) [2024-06-03 20:55:22,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:22,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:22,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 20:55:22,572 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:55:22,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:22,573 INFO L85 PathProgramCache]: Analyzing trace with hash -863464584, now seen corresponding path program 5 times [2024-06-03 20:55:22,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:22,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968090513] [2024-06-03 20:55:22,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:22,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:22,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:22,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968090513] [2024-06-03 20:55:22,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968090513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:22,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:22,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:55:22,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204254574] [2024-06-03 20:55:22,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:22,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:55:22,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:22,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:55:22,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:55:22,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:55:22,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 478 transitions, 6726 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) [2024-06-03 20:55:22,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:22,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:55:22,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:23,776 INFO L124 PetriNetUnfolderBase]: 2395/4212 cut-off events. [2024-06-03 20:55:23,776 INFO L125 PetriNetUnfolderBase]: For 692535/692535 co-relation queries the response was YES. [2024-06-03 20:55:23,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35513 conditions, 4212 events. 2395/4212 cut-off events. For 692535/692535 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 28577 event pairs, 451 based on Foata normal form. 1/4201 useless extension candidates. Maximal degree in co-relation 35342. Up to 3405 conditions per place. [2024-06-03 20:55:23,844 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 349 selfloop transitions, 141 changer transitions 0/499 dead transitions. [2024-06-03 20:55:23,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 499 transitions, 8482 flow [2024-06-03 20:55:23,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:55:23,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:55:23,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-03 20:55:23,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823863636363636 [2024-06-03 20:55:23,845 INFO L175 Difference]: Start difference. First operand has 417 places, 478 transitions, 6726 flow. Second operand 8 states and 205 transitions. [2024-06-03 20:55:23,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 499 transitions, 8482 flow [2024-06-03 20:55:28,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 499 transitions, 8216 flow, removed 61 selfloop flow, removed 2 redundant places. [2024-06-03 20:55:28,436 INFO L231 Difference]: Finished difference. Result has 423 places, 478 transitions, 6748 flow [2024-06-03 20:55:28,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6460, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6748, PETRI_PLACES=423, PETRI_TRANSITIONS=478} [2024-06-03 20:55:28,437 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 378 predicate places. [2024-06-03 20:55:28,437 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 478 transitions, 6748 flow [2024-06-03 20:55:28,437 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) [2024-06-03 20:55:28,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:28,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:28,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 20:55:28,437 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:55:28,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:28,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1982195930, now seen corresponding path program 6 times [2024-06-03 20:55:28,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:28,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364457236] [2024-06-03 20:55:28,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:28,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:28,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:28,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364457236] [2024-06-03 20:55:28,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364457236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:28,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:28,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:55:28,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156051654] [2024-06-03 20:55:28,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:28,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:55:28,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:28,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:55:28,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:55:28,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:55:28,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 478 transitions, 6748 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) [2024-06-03 20:55:28,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:28,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:55:28,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:29,657 INFO L124 PetriNetUnfolderBase]: 2392/4208 cut-off events. [2024-06-03 20:55:29,657 INFO L125 PetriNetUnfolderBase]: For 696080/696080 co-relation queries the response was YES. [2024-06-03 20:55:29,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35385 conditions, 4208 events. 2392/4208 cut-off events. For 696080/696080 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 28520 event pairs, 451 based on Foata normal form. 1/4197 useless extension candidates. Maximal degree in co-relation 35213. Up to 3402 conditions per place. [2024-06-03 20:55:29,718 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 342 selfloop transitions, 147 changer transitions 0/498 dead transitions. [2024-06-03 20:55:29,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 498 transitions, 8262 flow [2024-06-03 20:55:29,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:55:29,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:55:29,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-03 20:55:29,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767045454545454 [2024-06-03 20:55:29,719 INFO L175 Difference]: Start difference. First operand has 423 places, 478 transitions, 6748 flow. Second operand 8 states and 203 transitions. [2024-06-03 20:55:29,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 498 transitions, 8262 flow [2024-06-03 20:55:33,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 498 transitions, 7938 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 20:55:33,567 INFO L231 Difference]: Finished difference. Result has 425 places, 478 transitions, 6724 flow [2024-06-03 20:55:33,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6424, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6724, PETRI_PLACES=425, PETRI_TRANSITIONS=478} [2024-06-03 20:55:33,567 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 380 predicate places. [2024-06-03 20:55:33,567 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 478 transitions, 6724 flow [2024-06-03 20:55:33,568 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) [2024-06-03 20:55:33,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:33,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:33,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 20:55:33,568 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:55:33,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:33,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1700360044, now seen corresponding path program 2 times [2024-06-03 20:55:33,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:33,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39120850] [2024-06-03 20:55:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:33,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:33,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:33,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:33,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39120850] [2024-06-03 20:55:33,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39120850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:33,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:33,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:55:33,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031551375] [2024-06-03 20:55:33,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:33,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:55:33,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:33,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:55:33,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:55:33,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:55:33,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 478 transitions, 6724 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) [2024-06-03 20:55:33,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:33,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:55:33,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:34,774 INFO L124 PetriNetUnfolderBase]: 2400/4225 cut-off events. [2024-06-03 20:55:34,774 INFO L125 PetriNetUnfolderBase]: For 714731/714731 co-relation queries the response was YES. [2024-06-03 20:55:34,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35593 conditions, 4225 events. 2400/4225 cut-off events. For 714731/714731 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 28672 event pairs, 441 based on Foata normal form. 2/4219 useless extension candidates. Maximal degree in co-relation 35420. Up to 3570 conditions per place. [2024-06-03 20:55:34,835 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 401 selfloop transitions, 89 changer transitions 0/499 dead transitions. [2024-06-03 20:55:34,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 499 transitions, 7814 flow [2024-06-03 20:55:34,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:55:34,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:55:34,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-03 20:55:34,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-03 20:55:34,837 INFO L175 Difference]: Start difference. First operand has 425 places, 478 transitions, 6724 flow. Second operand 8 states and 198 transitions. [2024-06-03 20:55:34,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 499 transitions, 7814 flow [2024-06-03 20:55:38,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 499 transitions, 7517 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 20:55:38,072 INFO L231 Difference]: Finished difference. Result has 426 places, 480 transitions, 6678 flow [2024-06-03 20:55:38,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6427, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6678, PETRI_PLACES=426, PETRI_TRANSITIONS=480} [2024-06-03 20:55:38,072 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 381 predicate places. [2024-06-03 20:55:38,072 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 480 transitions, 6678 flow [2024-06-03 20:55:38,073 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) [2024-06-03 20:55:38,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:38,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:38,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 20:55:38,073 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:55:38,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:38,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1470671434, now seen corresponding path program 3 times [2024-06-03 20:55:38,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:38,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717222972] [2024-06-03 20:55:38,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:38,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:38,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:38,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717222972] [2024-06-03 20:55:38,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717222972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:38,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:38,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:55:38,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837169364] [2024-06-03 20:55:38,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:38,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:55:38,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:38,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:55:38,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:55:38,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:55:38,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 480 transitions, 6678 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) [2024-06-03 20:55:38,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:38,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:55:38,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:39,390 INFO L124 PetriNetUnfolderBase]: 2408/4241 cut-off events. [2024-06-03 20:55:39,390 INFO L125 PetriNetUnfolderBase]: For 725835/725835 co-relation queries the response was YES. [2024-06-03 20:55:39,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35792 conditions, 4241 events. 2408/4241 cut-off events. For 725835/725835 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 28827 event pairs, 443 based on Foata normal form. 2/4235 useless extension candidates. Maximal degree in co-relation 35618. Up to 3582 conditions per place. [2024-06-03 20:55:39,485 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 401 selfloop transitions, 91 changer transitions 0/501 dead transitions. [2024-06-03 20:55:39,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 501 transitions, 7776 flow [2024-06-03 20:55:39,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:55:39,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:55:39,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-03 20:55:39,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596590909090909 [2024-06-03 20:55:39,486 INFO L175 Difference]: Start difference. First operand has 426 places, 480 transitions, 6678 flow. Second operand 8 states and 197 transitions. [2024-06-03 20:55:39,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 501 transitions, 7776 flow [2024-06-03 20:55:43,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 501 transitions, 7541 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-03 20:55:43,624 INFO L231 Difference]: Finished difference. Result has 428 places, 482 transitions, 6702 flow [2024-06-03 20:55:43,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6443, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6702, PETRI_PLACES=428, PETRI_TRANSITIONS=482} [2024-06-03 20:55:43,624 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 383 predicate places. [2024-06-03 20:55:43,624 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 482 transitions, 6702 flow [2024-06-03 20:55:43,625 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) [2024-06-03 20:55:43,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:43,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:43,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 20:55:43,625 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:55:43,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:43,625 INFO L85 PathProgramCache]: Analyzing trace with hash -2043203436, now seen corresponding path program 4 times [2024-06-03 20:55:43,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:43,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277335592] [2024-06-03 20:55:43,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:43,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:43,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:43,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277335592] [2024-06-03 20:55:43,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277335592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:43,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:43,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:55:43,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584542879] [2024-06-03 20:55:43,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:43,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:55:43,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:43,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:55:43,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:55:44,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:55:44,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 482 transitions, 6702 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) [2024-06-03 20:55:44,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:44,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:55:44,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:44,827 INFO L124 PetriNetUnfolderBase]: 2429/4272 cut-off events. [2024-06-03 20:55:44,827 INFO L125 PetriNetUnfolderBase]: For 754526/754526 co-relation queries the response was YES. [2024-06-03 20:55:44,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36523 conditions, 4272 events. 2429/4272 cut-off events. For 754526/754526 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 28996 event pairs, 442 based on Foata normal form. 2/4266 useless extension candidates. Maximal degree in co-relation 36348. Up to 3578 conditions per place. [2024-06-03 20:55:44,890 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 400 selfloop transitions, 99 changer transitions 0/508 dead transitions. [2024-06-03 20:55:44,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 508 transitions, 8157 flow [2024-06-03 20:55:44,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:55:44,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:55:44,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-03 20:55:44,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-03 20:55:44,891 INFO L175 Difference]: Start difference. First operand has 428 places, 482 transitions, 6702 flow. Second operand 8 states and 199 transitions. [2024-06-03 20:55:44,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 508 transitions, 8157 flow [2024-06-03 20:55:48,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 508 transitions, 7914 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-03 20:55:48,747 INFO L231 Difference]: Finished difference. Result has 431 places, 487 transitions, 6839 flow [2024-06-03 20:55:48,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6459, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6839, PETRI_PLACES=431, PETRI_TRANSITIONS=487} [2024-06-03 20:55:48,747 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 386 predicate places. [2024-06-03 20:55:48,747 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 487 transitions, 6839 flow [2024-06-03 20:55:48,748 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) [2024-06-03 20:55:48,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:48,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:48,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 20:55:48,748 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:55:48,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:48,748 INFO L85 PathProgramCache]: Analyzing trace with hash -473431596, now seen corresponding path program 11 times [2024-06-03 20:55:48,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:48,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486015379] [2024-06-03 20:55:48,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:48,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:49,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:49,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486015379] [2024-06-03 20:55:49,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486015379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:49,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:49,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:55:49,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170878706] [2024-06-03 20:55:49,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:49,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:55:49,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:49,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:55:49,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:55:49,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:55:49,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 487 transitions, 6839 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) [2024-06-03 20:55:49,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:49,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:55:49,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:50,154 INFO L124 PetriNetUnfolderBase]: 2437/4283 cut-off events. [2024-06-03 20:55:50,154 INFO L125 PetriNetUnfolderBase]: For 768931/768931 co-relation queries the response was YES. [2024-06-03 20:55:50,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36846 conditions, 4283 events. 2437/4283 cut-off events. For 768931/768931 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 29088 event pairs, 436 based on Foata normal form. 2/4273 useless extension candidates. Maximal degree in co-relation 36669. Up to 3605 conditions per place. [2024-06-03 20:55:50,211 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 439 selfloop transitions, 75 changer transitions 0/523 dead transitions. [2024-06-03 20:55:50,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 523 transitions, 8353 flow [2024-06-03 20:55:50,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:55:50,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:55:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-03 20:55:50,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5732323232323232 [2024-06-03 20:55:50,213 INFO L175 Difference]: Start difference. First operand has 431 places, 487 transitions, 6839 flow. Second operand 9 states and 227 transitions. [2024-06-03 20:55:50,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 523 transitions, 8353 flow [2024-06-03 20:55:54,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 523 transitions, 8143 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-03 20:55:54,146 INFO L231 Difference]: Finished difference. Result has 437 places, 492 transitions, 6956 flow [2024-06-03 20:55:54,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6629, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6956, PETRI_PLACES=437, PETRI_TRANSITIONS=492} [2024-06-03 20:55:54,147 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 392 predicate places. [2024-06-03 20:55:54,147 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 492 transitions, 6956 flow [2024-06-03 20:55:54,147 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) [2024-06-03 20:55:54,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:54,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:54,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 20:55:54,147 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:55:54,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:54,148 INFO L85 PathProgramCache]: Analyzing trace with hash 458192822, now seen corresponding path program 12 times [2024-06-03 20:55:54,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:54,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686945388] [2024-06-03 20:55:54,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:54,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:54,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:54,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686945388] [2024-06-03 20:55:54,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686945388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:54,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:54,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:55:54,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661843958] [2024-06-03 20:55:54,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:54,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:55:54,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:54,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:55:54,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:55:54,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:55:54,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 492 transitions, 6956 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) [2024-06-03 20:55:54,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:54,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:55:54,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:55,518 INFO L124 PetriNetUnfolderBase]: 2445/4300 cut-off events. [2024-06-03 20:55:55,519 INFO L125 PetriNetUnfolderBase]: For 781038/781038 co-relation queries the response was YES. [2024-06-03 20:55:55,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37135 conditions, 4300 events. 2445/4300 cut-off events. For 781038/781038 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 29238 event pairs, 443 based on Foata normal form. 2/4295 useless extension candidates. Maximal degree in co-relation 36955. Up to 3611 conditions per place. [2024-06-03 20:55:55,586 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 426 selfloop transitions, 92 changer transitions 0/527 dead transitions. [2024-06-03 20:55:55,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 527 transitions, 8150 flow [2024-06-03 20:55:55,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:55:55,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:55:55,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2024-06-03 20:55:55,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5659090909090909 [2024-06-03 20:55:55,588 INFO L175 Difference]: Start difference. First operand has 437 places, 492 transitions, 6956 flow. Second operand 10 states and 249 transitions. [2024-06-03 20:55:55,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 527 transitions, 8150 flow [2024-06-03 20:56:00,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 527 transitions, 7906 flow, removed 79 selfloop flow, removed 5 redundant places. [2024-06-03 20:56:00,240 INFO L231 Difference]: Finished difference. Result has 442 places, 494 transitions, 6981 flow [2024-06-03 20:56:00,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6754, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6981, PETRI_PLACES=442, PETRI_TRANSITIONS=494} [2024-06-03 20:56:00,240 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 397 predicate places. [2024-06-03 20:56:00,240 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 494 transitions, 6981 flow [2024-06-03 20:56:00,241 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) [2024-06-03 20:56:00,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:00,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:56:00,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 20:56:00,241 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:56:00,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:00,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1836825098, now seen corresponding path program 13 times [2024-06-03 20:56:00,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:00,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310046207] [2024-06-03 20:56:00,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:00,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:00,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:00,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310046207] [2024-06-03 20:56:00,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310046207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:00,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:00,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:56:00,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719272501] [2024-06-03 20:56:00,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:00,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:56:00,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:00,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:56:00,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:56:00,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:56:00,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 494 transitions, 6981 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) [2024-06-03 20:56:00,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:00,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:56:00,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:01,643 INFO L124 PetriNetUnfolderBase]: 2453/4312 cut-off events. [2024-06-03 20:56:01,643 INFO L125 PetriNetUnfolderBase]: For 788640/788640 co-relation queries the response was YES. [2024-06-03 20:56:01,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37079 conditions, 4312 events. 2453/4312 cut-off events. For 788640/788640 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 29270 event pairs, 443 based on Foata normal form. 2/4307 useless extension candidates. Maximal degree in co-relation 36897. Up to 3623 conditions per place. [2024-06-03 20:56:01,722 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 429 selfloop transitions, 93 changer transitions 0/531 dead transitions. [2024-06-03 20:56:01,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 531 transitions, 8149 flow [2024-06-03 20:56:01,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:56:01,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:56:01,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 289 transitions. [2024-06-03 20:56:01,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5473484848484849 [2024-06-03 20:56:01,723 INFO L175 Difference]: Start difference. First operand has 442 places, 494 transitions, 6981 flow. Second operand 12 states and 289 transitions. [2024-06-03 20:56:01,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 531 transitions, 8149 flow [2024-06-03 20:56:06,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 531 transitions, 7956 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 20:56:06,204 INFO L231 Difference]: Finished difference. Result has 447 places, 496 transitions, 7021 flow [2024-06-03 20:56:06,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6788, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7021, PETRI_PLACES=447, PETRI_TRANSITIONS=496} [2024-06-03 20:56:06,204 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 402 predicate places. [2024-06-03 20:56:06,204 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 496 transitions, 7021 flow [2024-06-03 20:56:06,205 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) [2024-06-03 20:56:06,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:06,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:56:06,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 20:56:06,205 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:56:06,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:06,205 INFO L85 PathProgramCache]: Analyzing trace with hash -606067692, now seen corresponding path program 14 times [2024-06-03 20:56:06,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:06,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743512131] [2024-06-03 20:56:06,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:06,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:06,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:06,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743512131] [2024-06-03 20:56:06,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743512131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:06,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:06,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:56:06,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547629755] [2024-06-03 20:56:06,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:06,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:56:06,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:06,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:56:06,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:56:06,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:56:06,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 496 transitions, 7021 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) [2024-06-03 20:56:06,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:06,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:56:06,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:07,599 INFO L124 PetriNetUnfolderBase]: 2461/4324 cut-off events. [2024-06-03 20:56:07,600 INFO L125 PetriNetUnfolderBase]: For 800686/800686 co-relation queries the response was YES. [2024-06-03 20:56:07,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37259 conditions, 4324 events. 2461/4324 cut-off events. For 800686/800686 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 29371 event pairs, 443 based on Foata normal form. 2/4319 useless extension candidates. Maximal degree in co-relation 37075. Up to 3635 conditions per place. [2024-06-03 20:56:07,667 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 422 selfloop transitions, 95 changer transitions 0/526 dead transitions. [2024-06-03 20:56:07,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 526 transitions, 8165 flow [2024-06-03 20:56:07,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:56:07,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:56:07,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 262 transitions. [2024-06-03 20:56:07,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5413223140495868 [2024-06-03 20:56:07,668 INFO L175 Difference]: Start difference. First operand has 447 places, 496 transitions, 7021 flow. Second operand 11 states and 262 transitions. [2024-06-03 20:56:07,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 526 transitions, 8165 flow [2024-06-03 20:56:12,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 526 transitions, 7958 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-03 20:56:12,507 INFO L231 Difference]: Finished difference. Result has 449 places, 498 transitions, 7055 flow [2024-06-03 20:56:12,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6814, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7055, PETRI_PLACES=449, PETRI_TRANSITIONS=498} [2024-06-03 20:56:12,507 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 404 predicate places. [2024-06-03 20:56:12,507 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 498 transitions, 7055 flow [2024-06-03 20:56:12,507 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) [2024-06-03 20:56:12,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:12,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:56:12,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 20:56:12,508 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:56:12,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:12,508 INFO L85 PathProgramCache]: Analyzing trace with hash 308180662, now seen corresponding path program 15 times [2024-06-03 20:56:12,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:12,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430365528] [2024-06-03 20:56:12,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:12,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:12,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:12,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430365528] [2024-06-03 20:56:12,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430365528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:12,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:12,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:56:12,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060328079] [2024-06-03 20:56:12,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:12,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:56:12,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:12,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:56:12,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:56:12,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:56:12,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 498 transitions, 7055 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) [2024-06-03 20:56:12,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:12,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:56:12,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:13,923 INFO L124 PetriNetUnfolderBase]: 2456/4312 cut-off events. [2024-06-03 20:56:13,923 INFO L125 PetriNetUnfolderBase]: For 795488/795488 co-relation queries the response was YES. [2024-06-03 20:56:13,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37004 conditions, 4312 events. 2456/4312 cut-off events. For 795488/795488 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 29283 event pairs, 451 based on Foata normal form. 2/4305 useless extension candidates. Maximal degree in co-relation 36819. Up to 3628 conditions per place. [2024-06-03 20:56:13,991 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 417 selfloop transitions, 95 changer transitions 0/521 dead transitions. [2024-06-03 20:56:13,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 521 transitions, 8156 flow [2024-06-03 20:56:13,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:56:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:56:13,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 256 transitions. [2024-06-03 20:56:13,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5289256198347108 [2024-06-03 20:56:13,992 INFO L175 Difference]: Start difference. First operand has 449 places, 498 transitions, 7055 flow. Second operand 11 states and 256 transitions. [2024-06-03 20:56:13,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 521 transitions, 8156 flow [2024-06-03 20:56:19,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 521 transitions, 7893 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-03 20:56:19,110 INFO L231 Difference]: Finished difference. Result has 451 places, 499 transitions, 7014 flow [2024-06-03 20:56:19,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6806, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7014, PETRI_PLACES=451, PETRI_TRANSITIONS=499} [2024-06-03 20:56:19,111 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 406 predicate places. [2024-06-03 20:56:19,111 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 499 transitions, 7014 flow [2024-06-03 20:56:19,111 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) [2024-06-03 20:56:19,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:19,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:56:19,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 20:56:19,111 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:56:19,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:19,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1347560468, now seen corresponding path program 16 times [2024-06-03 20:56:19,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:19,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026085115] [2024-06-03 20:56:19,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:19,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:19,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:19,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026085115] [2024-06-03 20:56:19,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026085115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:19,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:19,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:56:19,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120227159] [2024-06-03 20:56:19,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:19,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:56:19,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:19,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:56:19,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:56:19,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:56:19,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 499 transitions, 7014 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) [2024-06-03 20:56:19,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:19,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:56:19,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:20,571 INFO L124 PetriNetUnfolderBase]: 2451/4305 cut-off events. [2024-06-03 20:56:20,572 INFO L125 PetriNetUnfolderBase]: For 788442/788442 co-relation queries the response was YES. [2024-06-03 20:56:20,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36600 conditions, 4305 events. 2451/4305 cut-off events. For 788442/788442 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 29241 event pairs, 450 based on Foata normal form. 2/4298 useless extension candidates. Maximal degree in co-relation 36414. Up to 3621 conditions per place. [2024-06-03 20:56:20,632 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 420 selfloop transitions, 94 changer transitions 0/523 dead transitions. [2024-06-03 20:56:20,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 523 transitions, 8115 flow [2024-06-03 20:56:20,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:56:20,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:56:20,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 277 transitions. [2024-06-03 20:56:20,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5246212121212122 [2024-06-03 20:56:20,633 INFO L175 Difference]: Start difference. First operand has 451 places, 499 transitions, 7014 flow. Second operand 12 states and 277 transitions. [2024-06-03 20:56:20,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 523 transitions, 8115 flow [2024-06-03 20:56:26,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 523 transitions, 7914 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-03 20:56:26,035 INFO L231 Difference]: Finished difference. Result has 455 places, 500 transitions, 7027 flow [2024-06-03 20:56:26,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6821, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7027, PETRI_PLACES=455, PETRI_TRANSITIONS=500} [2024-06-03 20:56:26,035 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 410 predicate places. [2024-06-03 20:56:26,035 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 500 transitions, 7027 flow [2024-06-03 20:56:26,036 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) [2024-06-03 20:56:26,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:26,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:56:26,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 20:56:26,036 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:56:26,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:26,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1066630164, now seen corresponding path program 17 times [2024-06-03 20:56:26,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:26,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849087399] [2024-06-03 20:56:26,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:26,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:26,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:26,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849087399] [2024-06-03 20:56:26,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849087399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:26,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:26,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:56:26,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142682709] [2024-06-03 20:56:26,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:26,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:56:26,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:26,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:56:26,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:56:26,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:56:26,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 500 transitions, 7027 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) [2024-06-03 20:56:26,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:26,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:56:26,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:27,440 INFO L124 PetriNetUnfolderBase]: 2446/4300 cut-off events. [2024-06-03 20:56:27,440 INFO L125 PetriNetUnfolderBase]: For 781727/781727 co-relation queries the response was YES. [2024-06-03 20:56:27,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36311 conditions, 4300 events. 2446/4300 cut-off events. For 781727/781727 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 29236 event pairs, 444 based on Foata normal form. 2/4294 useless extension candidates. Maximal degree in co-relation 36124. Up to 3719 conditions per place. [2024-06-03 20:56:27,511 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 475 selfloop transitions, 29 changer transitions 0/513 dead transitions. [2024-06-03 20:56:27,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 513 transitions, 8081 flow [2024-06-03 20:56:27,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:56:27,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:56:27,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-03 20:56:27,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487012987012987 [2024-06-03 20:56:27,512 INFO L175 Difference]: Start difference. First operand has 455 places, 500 transitions, 7027 flow. Second operand 7 states and 169 transitions. [2024-06-03 20:56:27,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 513 transitions, 8081 flow [2024-06-03 20:56:32,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 513 transitions, 7860 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-03 20:56:32,676 INFO L231 Difference]: Finished difference. Result has 452 places, 501 transitions, 6889 flow [2024-06-03 20:56:32,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6814, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6889, PETRI_PLACES=452, PETRI_TRANSITIONS=501} [2024-06-03 20:56:32,676 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 407 predicate places. [2024-06-03 20:56:32,676 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 501 transitions, 6889 flow [2024-06-03 20:56:32,676 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) [2024-06-03 20:56:32,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:32,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:56:32,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 20:56:32,677 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:56:32,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:32,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1063773204, now seen corresponding path program 18 times [2024-06-03 20:56:32,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:32,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119202367] [2024-06-03 20:56:32,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:32,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:32,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:33,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:33,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:33,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119202367] [2024-06-03 20:56:33,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119202367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:33,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:33,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:56:33,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346774227] [2024-06-03 20:56:33,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:33,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:56:33,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:33,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:56:33,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:56:33,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:56:33,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 501 transitions, 6889 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) [2024-06-03 20:56:33,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:33,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:56:33,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:34,025 INFO L124 PetriNetUnfolderBase]: 2441/4291 cut-off events. [2024-06-03 20:56:34,026 INFO L125 PetriNetUnfolderBase]: For 774594/774594 co-relation queries the response was YES. [2024-06-03 20:56:34,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35850 conditions, 4291 events. 2441/4291 cut-off events. For 774594/774594 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 29177 event pairs, 439 based on Foata normal form. 2/4283 useless extension candidates. Maximal degree in co-relation 35662. Up to 3698 conditions per place. [2024-06-03 20:56:34,093 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 474 selfloop transitions, 33 changer transitions 0/516 dead transitions. [2024-06-03 20:56:34,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 516 transitions, 7952 flow [2024-06-03 20:56:34,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:56:34,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:56:34,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-03 20:56:34,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5397727272727273 [2024-06-03 20:56:34,094 INFO L175 Difference]: Start difference. First operand has 452 places, 501 transitions, 6889 flow. Second operand 8 states and 190 transitions. [2024-06-03 20:56:34,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 516 transitions, 7952 flow [2024-06-03 20:56:39,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 516 transitions, 7869 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 20:56:39,639 INFO L231 Difference]: Finished difference. Result has 455 places, 502 transitions, 6896 flow [2024-06-03 20:56:39,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6814, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6896, PETRI_PLACES=455, PETRI_TRANSITIONS=502} [2024-06-03 20:56:39,639 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 410 predicate places. [2024-06-03 20:56:39,639 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 502 transitions, 6896 flow [2024-06-03 20:56:39,639 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) [2024-06-03 20:56:39,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:39,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:56:39,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 20:56:39,640 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:56:39,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:39,640 INFO L85 PathProgramCache]: Analyzing trace with hash -45779084, now seen corresponding path program 12 times [2024-06-03 20:56:39,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:39,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417650784] [2024-06-03 20:56:39,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:39,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:39,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:40,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:40,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417650784] [2024-06-03 20:56:40,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417650784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:40,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:40,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:56:40,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209424617] [2024-06-03 20:56:40,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:40,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:56:40,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:40,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:56:40,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:56:40,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:56:40,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 502 transitions, 6896 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) [2024-06-03 20:56:40,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:40,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:56:40,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:41,098 INFO L124 PetriNetUnfolderBase]: 2473/4354 cut-off events. [2024-06-03 20:56:41,098 INFO L125 PetriNetUnfolderBase]: For 794539/794539 co-relation queries the response was YES. [2024-06-03 20:56:41,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36541 conditions, 4354 events. 2473/4354 cut-off events. For 794539/794539 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 29696 event pairs, 436 based on Foata normal form. 1/4350 useless extension candidates. Maximal degree in co-relation 36352. Up to 3628 conditions per place. [2024-06-03 20:56:41,167 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 487 selfloop transitions, 65 changer transitions 0/561 dead transitions. [2024-06-03 20:56:41,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 561 transitions, 8881 flow [2024-06-03 20:56:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 20:56:41,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 20:56:41,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 339 transitions. [2024-06-03 20:56:41,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5503246753246753 [2024-06-03 20:56:41,168 INFO L175 Difference]: Start difference. First operand has 455 places, 502 transitions, 6896 flow. Second operand 14 states and 339 transitions. [2024-06-03 20:56:41,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 561 transitions, 8881 flow [2024-06-03 20:56:46,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 561 transitions, 8814 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 20:56:46,686 INFO L231 Difference]: Finished difference. Result has 463 places, 514 transitions, 7200 flow [2024-06-03 20:56:46,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6829, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7200, PETRI_PLACES=463, PETRI_TRANSITIONS=514} [2024-06-03 20:56:46,686 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 418 predicate places. [2024-06-03 20:56:46,686 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 514 transitions, 7200 flow [2024-06-03 20:56:46,687 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) [2024-06-03 20:56:46,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:46,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:56:46,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 20:56:46,687 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:56:46,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:46,687 INFO L85 PathProgramCache]: Analyzing trace with hash -34351244, now seen corresponding path program 13 times [2024-06-03 20:56:46,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:46,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756303430] [2024-06-03 20:56:46,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:46,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:47,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:47,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756303430] [2024-06-03 20:56:47,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756303430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:47,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:47,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:56:47,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155584206] [2024-06-03 20:56:47,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:47,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:56:47,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:47,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:56:47,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:56:47,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:56:47,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 514 transitions, 7200 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) [2024-06-03 20:56:47,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:47,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:56:47,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:48,147 INFO L124 PetriNetUnfolderBase]: 2470/4350 cut-off events. [2024-06-03 20:56:48,148 INFO L125 PetriNetUnfolderBase]: For 797317/797317 co-relation queries the response was YES. [2024-06-03 20:56:48,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36609 conditions, 4350 events. 2470/4350 cut-off events. For 797317/797317 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 29673 event pairs, 436 based on Foata normal form. 1/4346 useless extension candidates. Maximal degree in co-relation 36419. Up to 3625 conditions per place. [2024-06-03 20:56:48,218 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 481 selfloop transitions, 65 changer transitions 0/555 dead transitions. [2024-06-03 20:56:48,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 555 transitions, 8664 flow [2024-06-03 20:56:48,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:56:48,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:56:48,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 295 transitions. [2024-06-03 20:56:48,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587121212121212 [2024-06-03 20:56:48,219 INFO L175 Difference]: Start difference. First operand has 463 places, 514 transitions, 7200 flow. Second operand 12 states and 295 transitions. [2024-06-03 20:56:48,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 555 transitions, 8664 flow [2024-06-03 20:56:53,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 555 transitions, 8474 flow, removed 62 selfloop flow, removed 8 redundant places. [2024-06-03 20:56:53,546 INFO L231 Difference]: Finished difference. Result has 467 places, 514 transitions, 7146 flow [2024-06-03 20:56:53,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7010, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7146, PETRI_PLACES=467, PETRI_TRANSITIONS=514} [2024-06-03 20:56:53,547 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 422 predicate places. [2024-06-03 20:56:53,547 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 514 transitions, 7146 flow [2024-06-03 20:56:53,547 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) [2024-06-03 20:56:53,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:53,547 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, 1, 1] [2024-06-03 20:56:53,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 20:56:53,548 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:56:53,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:53,548 INFO L85 PathProgramCache]: Analyzing trace with hash 717483914, now seen corresponding path program 14 times [2024-06-03 20:56:53,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:53,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868395440] [2024-06-03 20:56:53,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:53,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:53,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:53,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868395440] [2024-06-03 20:56:53,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868395440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:53,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:53,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:56:53,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184509644] [2024-06-03 20:56:53,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:53,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:56:53,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:53,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:56:53,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:56:54,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:56:54,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 514 transitions, 7146 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) [2024-06-03 20:56:54,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:54,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:56:54,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:55,047 INFO L124 PetriNetUnfolderBase]: 2467/4346 cut-off events. [2024-06-03 20:56:55,047 INFO L125 PetriNetUnfolderBase]: For 798269/798269 co-relation queries the response was YES. [2024-06-03 20:56:55,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36564 conditions, 4346 events. 2467/4346 cut-off events. For 798269/798269 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 29625 event pairs, 436 based on Foata normal form. 1/4342 useless extension candidates. Maximal degree in co-relation 36372. Up to 3631 conditions per place. [2024-06-03 20:56:55,117 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 485 selfloop transitions, 55 changer transitions 0/549 dead transitions. [2024-06-03 20:56:55,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 549 transitions, 8314 flow [2024-06-03 20:56:55,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:56:55,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:56:55,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-03 20:56:55,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-03 20:56:55,119 INFO L175 Difference]: Start difference. First operand has 467 places, 514 transitions, 7146 flow. Second operand 10 states and 250 transitions. [2024-06-03 20:56:55,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 549 transitions, 8314 flow [2024-06-03 20:57:00,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 549 transitions, 8158 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-03 20:57:00,659 INFO L231 Difference]: Finished difference. Result has 466 places, 514 transitions, 7106 flow [2024-06-03 20:57:00,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6990, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7106, PETRI_PLACES=466, PETRI_TRANSITIONS=514} [2024-06-03 20:57:00,660 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 421 predicate places. [2024-06-03 20:57:00,660 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 514 transitions, 7106 flow [2024-06-03 20:57:00,660 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) [2024-06-03 20:57:00,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:57:00,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:57:00,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 20:57:00,676 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:57:00,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:57:00,677 INFO L85 PathProgramCache]: Analyzing trace with hash 2142660468, now seen corresponding path program 15 times [2024-06-03 20:57:00,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:57:00,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993230767] [2024-06-03 20:57:00,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:57:00,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:57:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:57:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:57:01,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:57:01,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993230767] [2024-06-03 20:57:01,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993230767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:57:01,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:57:01,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:57:01,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614180345] [2024-06-03 20:57:01,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:57:01,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:57:01,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:57:01,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:57:01,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:57:01,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:57:01,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 514 transitions, 7106 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) [2024-06-03 20:57:01,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:57:01,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:57:01,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:57:02,173 INFO L124 PetriNetUnfolderBase]: 2480/4366 cut-off events. [2024-06-03 20:57:02,173 INFO L125 PetriNetUnfolderBase]: For 819382/819382 co-relation queries the response was YES. [2024-06-03 20:57:02,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36932 conditions, 4366 events. 2480/4366 cut-off events. For 819382/819382 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 29771 event pairs, 439 based on Foata normal form. 1/4360 useless extension candidates. Maximal degree in co-relation 36739. Up to 3450 conditions per place. [2024-06-03 20:57:02,242 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 352 selfloop transitions, 194 changer transitions 0/555 dead transitions. [2024-06-03 20:57:02,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 555 transitions, 9248 flow [2024-06-03 20:57:02,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:57:02,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:57:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-06-03 20:57:02,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5840909090909091 [2024-06-03 20:57:02,243 INFO L175 Difference]: Start difference. First operand has 466 places, 514 transitions, 7106 flow. Second operand 10 states and 257 transitions. [2024-06-03 20:57:02,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 555 transitions, 9248 flow [2024-06-03 20:57:08,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 555 transitions, 9134 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-03 20:57:08,380 INFO L231 Difference]: Finished difference. Result has 467 places, 520 transitions, 7528 flow [2024-06-03 20:57:08,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6992, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7528, PETRI_PLACES=467, PETRI_TRANSITIONS=520} [2024-06-03 20:57:08,380 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 422 predicate places. [2024-06-03 20:57:08,381 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 520 transitions, 7528 flow [2024-06-03 20:57:08,381 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) [2024-06-03 20:57:08,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:57:08,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:57:08,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 20:57:08,381 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:57:08,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:57:08,382 INFO L85 PathProgramCache]: Analyzing trace with hash 239912820, now seen corresponding path program 16 times [2024-06-03 20:57:08,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:57:08,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651540527] [2024-06-03 20:57:08,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:57:08,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:57:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:57:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:57:08,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:57:08,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651540527] [2024-06-03 20:57:08,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651540527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:57:08,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:57:08,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:57:08,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862450403] [2024-06-03 20:57:08,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:57:08,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:57:08,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:57:08,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:57:08,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:57:08,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:57:08,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 520 transitions, 7528 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) [2024-06-03 20:57:08,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:57:08,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:57:08,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:57:09,778 INFO L124 PetriNetUnfolderBase]: 2485/4375 cut-off events. [2024-06-03 20:57:09,778 INFO L125 PetriNetUnfolderBase]: For 832392/832392 co-relation queries the response was YES. [2024-06-03 20:57:09,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37392 conditions, 4375 events. 2485/4375 cut-off events. For 832392/832392 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 29901 event pairs, 439 based on Foata normal form. 1/4369 useless extension candidates. Maximal degree in co-relation 37198. Up to 3456 conditions per place. [2024-06-03 20:57:09,849 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 352 selfloop transitions, 200 changer transitions 0/561 dead transitions. [2024-06-03 20:57:09,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 561 transitions, 9905 flow [2024-06-03 20:57:09,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:57:09,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:57:09,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 300 transitions. [2024-06-03 20:57:09,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-03 20:57:09,850 INFO L175 Difference]: Start difference. First operand has 467 places, 520 transitions, 7528 flow. Second operand 12 states and 300 transitions. [2024-06-03 20:57:09,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 561 transitions, 9905 flow [2024-06-03 20:57:15,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 561 transitions, 9382 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-03 20:57:15,530 INFO L231 Difference]: Finished difference. Result has 472 places, 523 transitions, 7488 flow [2024-06-03 20:57:15,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7029, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7488, PETRI_PLACES=472, PETRI_TRANSITIONS=523} [2024-06-03 20:57:15,531 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 427 predicate places. [2024-06-03 20:57:15,531 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 523 transitions, 7488 flow [2024-06-03 20:57:15,531 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) [2024-06-03 20:57:15,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:57:15,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:57:15,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 20:57:15,531 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:57:15,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:57:15,532 INFO L85 PathProgramCache]: Analyzing trace with hash 246579060, now seen corresponding path program 17 times [2024-06-03 20:57:15,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:57:15,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896225139] [2024-06-03 20:57:15,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:57:15,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:57:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:57:15,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:57:15,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:57:15,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896225139] [2024-06-03 20:57:15,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896225139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:57:15,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:57:15,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:57:15,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310267955] [2024-06-03 20:57:15,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:57:15,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:57:15,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:57:15,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:57:15,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:57:15,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:57:15,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 523 transitions, 7488 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) [2024-06-03 20:57:15,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:57:15,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:57:15,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:57:16,889 INFO L124 PetriNetUnfolderBase]: 2490/4384 cut-off events. [2024-06-03 20:57:16,889 INFO L125 PetriNetUnfolderBase]: For 842317/842317 co-relation queries the response was YES. [2024-06-03 20:57:16,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37395 conditions, 4384 events. 2490/4384 cut-off events. For 842317/842317 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 29974 event pairs, 439 based on Foata normal form. 1/4378 useless extension candidates. Maximal degree in co-relation 37200. Up to 3462 conditions per place. [2024-06-03 20:57:16,960 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 350 selfloop transitions, 205 changer transitions 0/564 dead transitions. [2024-06-03 20:57:16,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 564 transitions, 9583 flow [2024-06-03 20:57:16,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:57:16,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:57:16,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 318 transitions. [2024-06-03 20:57:16,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5559440559440559 [2024-06-03 20:57:16,962 INFO L175 Difference]: Start difference. First operand has 472 places, 523 transitions, 7488 flow. Second operand 13 states and 318 transitions. [2024-06-03 20:57:16,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 564 transitions, 9583 flow [2024-06-03 20:57:21,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 564 transitions, 9050 flow, removed 25 selfloop flow, removed 10 redundant places. [2024-06-03 20:57:21,702 INFO L231 Difference]: Finished difference. Result has 475 places, 526 transitions, 7430 flow [2024-06-03 20:57:21,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6964, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7430, PETRI_PLACES=475, PETRI_TRANSITIONS=526} [2024-06-03 20:57:21,703 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 430 predicate places. [2024-06-03 20:57:21,703 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 526 transitions, 7430 flow [2024-06-03 20:57:21,703 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) [2024-06-03 20:57:21,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:57:21,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:57:21,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 20:57:21,703 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:57:21,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:57:21,704 INFO L85 PathProgramCache]: Analyzing trace with hash -42819656, now seen corresponding path program 18 times [2024-06-03 20:57:21,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:57:21,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765768721] [2024-06-03 20:57:21,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:57:21,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:57:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:57:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:57:22,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:57:22,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765768721] [2024-06-03 20:57:22,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765768721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:57:22,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:57:22,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:57:22,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902844601] [2024-06-03 20:57:22,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:57:22,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:57:22,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:57:22,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:57:22,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:57:22,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:57:22,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 526 transitions, 7430 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) [2024-06-03 20:57:22,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:57:22,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:57:22,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:57:23,154 INFO L124 PetriNetUnfolderBase]: 2495/4395 cut-off events. [2024-06-03 20:57:23,154 INFO L125 PetriNetUnfolderBase]: For 850636/850636 co-relation queries the response was YES. [2024-06-03 20:57:23,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37225 conditions, 4395 events. 2495/4395 cut-off events. For 850636/850636 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 30032 event pairs, 436 based on Foata normal form. 1/4391 useless extension candidates. Maximal degree in co-relation 37029. Up to 3626 conditions per place. [2024-06-03 20:57:23,228 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 464 selfloop transitions, 99 changer transitions 0/572 dead transitions. [2024-06-03 20:57:23,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 572 transitions, 9002 flow [2024-06-03 20:57:23,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 20:57:23,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 20:57:23,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 333 transitions. [2024-06-03 20:57:23,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5405844155844156 [2024-06-03 20:57:23,230 INFO L175 Difference]: Start difference. First operand has 475 places, 526 transitions, 7430 flow. Second operand 14 states and 333 transitions. [2024-06-03 20:57:23,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 572 transitions, 9002 flow [2024-06-03 20:57:28,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 572 transitions, 8554 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-06-03 20:57:28,988 INFO L231 Difference]: Finished difference. Result has 480 places, 529 transitions, 7260 flow [2024-06-03 20:57:28,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6988, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7260, PETRI_PLACES=480, PETRI_TRANSITIONS=529} [2024-06-03 20:57:28,988 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 435 predicate places. [2024-06-03 20:57:28,989 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 529 transitions, 7260 flow [2024-06-03 20:57:28,989 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) [2024-06-03 20:57:28,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:57:28,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:57:28,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 20:57:28,989 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:57:28,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:57:28,990 INFO L85 PathProgramCache]: Analyzing trace with hash -31391816, now seen corresponding path program 19 times [2024-06-03 20:57:28,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:57:28,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20915478] [2024-06-03 20:57:28,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:57:28,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:57:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:57:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:57:29,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:57:29,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20915478] [2024-06-03 20:57:29,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20915478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:57:29,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:57:29,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:57:29,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797508449] [2024-06-03 20:57:29,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:57:29,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:57:29,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:57:29,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:57:29,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:57:29,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:57:29,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 529 transitions, 7260 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) [2024-06-03 20:57:29,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:57:29,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:57:29,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:57:30,412 INFO L124 PetriNetUnfolderBase]: 2492/4391 cut-off events. [2024-06-03 20:57:30,412 INFO L125 PetriNetUnfolderBase]: For 850822/850822 co-relation queries the response was YES. [2024-06-03 20:57:30,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36904 conditions, 4391 events. 2492/4391 cut-off events. For 850822/850822 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 30033 event pairs, 436 based on Foata normal form. 1/4387 useless extension candidates. Maximal degree in co-relation 36706. Up to 3623 conditions per place. [2024-06-03 20:57:30,484 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 465 selfloop transitions, 98 changer transitions 0/572 dead transitions. [2024-06-03 20:57:30,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 572 transitions, 8774 flow [2024-06-03 20:57:30,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 20:57:30,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 20:57:30,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 335 transitions. [2024-06-03 20:57:30,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5438311688311688 [2024-06-03 20:57:30,486 INFO L175 Difference]: Start difference. First operand has 480 places, 529 transitions, 7260 flow. Second operand 14 states and 335 transitions. [2024-06-03 20:57:30,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 572 transitions, 8774 flow [2024-06-03 20:57:36,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 572 transitions, 8464 flow, removed 30 selfloop flow, removed 13 redundant places. [2024-06-03 20:57:36,818 INFO L231 Difference]: Finished difference. Result has 481 places, 529 transitions, 7152 flow [2024-06-03 20:57:36,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6950, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7152, PETRI_PLACES=481, PETRI_TRANSITIONS=529} [2024-06-03 20:57:36,818 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 436 predicate places. [2024-06-03 20:57:36,818 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 529 transitions, 7152 flow [2024-06-03 20:57:36,818 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) [2024-06-03 20:57:36,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:57:36,819 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, 1, 1] [2024-06-03 20:57:36,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 20:57:36,819 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:57:36,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:57:36,819 INFO L85 PathProgramCache]: Analyzing trace with hash -343797900, now seen corresponding path program 20 times [2024-06-03 20:57:36,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:57:36,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727666387] [2024-06-03 20:57:36,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:57:36,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:57:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:57:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:57:37,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:57:37,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727666387] [2024-06-03 20:57:37,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727666387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:57:37,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:57:37,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:57:37,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200810404] [2024-06-03 20:57:37,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:57:37,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:57:37,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:57:37,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:57:37,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:57:37,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:57:37,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 529 transitions, 7152 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) [2024-06-03 20:57:37,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:57:37,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:57:37,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:57:38,330 INFO L124 PetriNetUnfolderBase]: 2489/4387 cut-off events. [2024-06-03 20:57:38,331 INFO L125 PetriNetUnfolderBase]: For 851844/851844 co-relation queries the response was YES. [2024-06-03 20:57:38,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36592 conditions, 4387 events. 2489/4387 cut-off events. For 851844/851844 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 30006 event pairs, 436 based on Foata normal form. 1/4383 useless extension candidates. Maximal degree in co-relation 36394. Up to 3620 conditions per place. [2024-06-03 20:57:38,396 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 456 selfloop transitions, 97 changer transitions 0/562 dead transitions. [2024-06-03 20:57:38,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 562 transitions, 8340 flow [2024-06-03 20:57:38,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:57:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:57:38,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-06-03 20:57:38,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5495867768595041 [2024-06-03 20:57:38,398 INFO L175 Difference]: Start difference. First operand has 481 places, 529 transitions, 7152 flow. Second operand 11 states and 266 transitions. [2024-06-03 20:57:38,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 562 transitions, 8340 flow [2024-06-03 20:57:44,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 562 transitions, 8084 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-06-03 20:57:44,953 INFO L231 Difference]: Finished difference. Result has 479 places, 529 transitions, 7096 flow [2024-06-03 20:57:44,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6896, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7096, PETRI_PLACES=479, PETRI_TRANSITIONS=529} [2024-06-03 20:57:44,954 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 434 predicate places. [2024-06-03 20:57:44,954 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 529 transitions, 7096 flow [2024-06-03 20:57:44,954 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) [2024-06-03 20:57:44,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:57:44,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:57:44,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 20:57:44,955 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:57:44,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:57:44,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1804832662, now seen corresponding path program 21 times [2024-06-03 20:57:44,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:57:44,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730823023] [2024-06-03 20:57:44,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:57:44,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:57:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:57:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:57:45,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:57:45,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730823023] [2024-06-03 20:57:45,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730823023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:57:45,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:57:45,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:57:45,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91920675] [2024-06-03 20:57:45,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:57:45,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:57:45,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:57:45,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:57:45,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:57:45,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:57:45,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 529 transitions, 7096 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) [2024-06-03 20:57:45,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:57:45,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:57:45,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:57:46,307 INFO L124 PetriNetUnfolderBase]: 2502/4407 cut-off events. [2024-06-03 20:57:46,307 INFO L125 PetriNetUnfolderBase]: For 873820/873820 co-relation queries the response was YES. [2024-06-03 20:57:46,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36930 conditions, 4407 events. 2502/4407 cut-off events. For 873820/873820 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 30181 event pairs, 439 based on Foata normal form. 1/4401 useless extension candidates. Maximal degree in co-relation 36731. Up to 3477 conditions per place. [2024-06-03 20:57:46,378 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 332 selfloop transitions, 224 changer transitions 0/565 dead transitions. [2024-06-03 20:57:46,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 565 transitions, 8972 flow [2024-06-03 20:57:46,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:57:46,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:57:46,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 289 transitions. [2024-06-03 20:57:46,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5473484848484849 [2024-06-03 20:57:46,380 INFO L175 Difference]: Start difference. First operand has 479 places, 529 transitions, 7096 flow. Second operand 12 states and 289 transitions. [2024-06-03 20:57:46,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 565 transitions, 8972 flow [2024-06-03 20:57:53,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 565 transitions, 8768 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-03 20:57:53,104 INFO L231 Difference]: Finished difference. Result has 480 places, 535 transitions, 7466 flow [2024-06-03 20:57:53,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6892, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7466, PETRI_PLACES=480, PETRI_TRANSITIONS=535} [2024-06-03 20:57:53,104 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 435 predicate places. [2024-06-03 20:57:53,105 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 535 transitions, 7466 flow [2024-06-03 20:57:53,105 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) [2024-06-03 20:57:53,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:57:53,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:57:53,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 20:57:53,105 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:57:53,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:57:53,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1503233096, now seen corresponding path program 22 times [2024-06-03 20:57:53,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:57:53,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8631749] [2024-06-03 20:57:53,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:57:53,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:57:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:57:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:57:53,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:57:53,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8631749] [2024-06-03 20:57:53,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8631749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:57:53,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:57:53,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:57:53,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217922136] [2024-06-03 20:57:53,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:57:53,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:57:53,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:57:53,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:57:53,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:57:53,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:57:53,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 535 transitions, 7466 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) [2024-06-03 20:57:53,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:57:53,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:57:53,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:57:54,621 INFO L124 PetriNetUnfolderBase]: 2507/4416 cut-off events. [2024-06-03 20:57:54,622 INFO L125 PetriNetUnfolderBase]: For 886797/886797 co-relation queries the response was YES. [2024-06-03 20:57:54,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37331 conditions, 4416 events. 2507/4416 cut-off events. For 886797/886797 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 30258 event pairs, 439 based on Foata normal form. 1/4410 useless extension candidates. Maximal degree in co-relation 37131. Up to 3483 conditions per place. [2024-06-03 20:57:54,695 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 339 selfloop transitions, 221 changer transitions 0/569 dead transitions. [2024-06-03 20:57:54,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 569 transitions, 9302 flow [2024-06-03 20:57:54,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:57:54,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:57:54,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 310 transitions. [2024-06-03 20:57:54,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541958041958042 [2024-06-03 20:57:54,696 INFO L175 Difference]: Start difference. First operand has 480 places, 535 transitions, 7466 flow. Second operand 13 states and 310 transitions. [2024-06-03 20:57:54,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 569 transitions, 9302 flow [2024-06-03 20:58:00,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 569 transitions, 8867 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-03 20:58:00,346 INFO L231 Difference]: Finished difference. Result has 484 places, 538 transitions, 7545 flow [2024-06-03 20:58:00,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7050, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7545, PETRI_PLACES=484, PETRI_TRANSITIONS=538} [2024-06-03 20:58:00,346 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 439 predicate places. [2024-06-03 20:58:00,346 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 538 transitions, 7545 flow [2024-06-03 20:58:00,347 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) [2024-06-03 20:58:00,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:58:00,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:58:00,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 20:58:00,347 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:58:00,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:58:00,347 INFO L85 PathProgramCache]: Analyzing trace with hash -606062732, now seen corresponding path program 23 times [2024-06-03 20:58:00,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:58:00,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262300285] [2024-06-03 20:58:00,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:58:00,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:58:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:58:00,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:58:00,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:58:00,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262300285] [2024-06-03 20:58:00,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262300285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:58:00,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:58:00,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:58:00,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278244252] [2024-06-03 20:58:00,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:58:00,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:58:00,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:58:00,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:58:00,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:58:00,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:58:00,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 538 transitions, 7545 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) [2024-06-03 20:58:00,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:58:00,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:58:00,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:58:01,742 INFO L124 PetriNetUnfolderBase]: 2504/4412 cut-off events. [2024-06-03 20:58:01,742 INFO L125 PetriNetUnfolderBase]: For 888497/888497 co-relation queries the response was YES. [2024-06-03 20:58:01,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37198 conditions, 4412 events. 2504/4412 cut-off events. For 888497/888497 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 30249 event pairs, 439 based on Foata normal form. 1/4406 useless extension candidates. Maximal degree in co-relation 36998. Up to 3480 conditions per place. [2024-06-03 20:58:01,816 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 337 selfloop transitions, 220 changer transitions 0/566 dead transitions. [2024-06-03 20:58:01,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 566 transitions, 9017 flow [2024-06-03 20:58:01,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:58:01,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:58:01,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 269 transitions. [2024-06-03 20:58:01,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5557851239669421 [2024-06-03 20:58:01,817 INFO L175 Difference]: Start difference. First operand has 484 places, 538 transitions, 7545 flow. Second operand 11 states and 269 transitions. [2024-06-03 20:58:01,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 566 transitions, 9017 flow [2024-06-03 20:58:08,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 566 transitions, 8506 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-03 20:58:08,885 INFO L231 Difference]: Finished difference. Result has 485 places, 538 transitions, 7480 flow [2024-06-03 20:58:08,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7034, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7480, PETRI_PLACES=485, PETRI_TRANSITIONS=538} [2024-06-03 20:58:08,900 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 440 predicate places. [2024-06-03 20:58:08,900 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 538 transitions, 7480 flow [2024-06-03 20:58:08,900 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) [2024-06-03 20:58:08,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:58:08,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:58:08,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 20:58:08,901 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:58:08,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:58:08,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2142667412, now seen corresponding path program 10 times [2024-06-03 20:58:08,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:58:08,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696926275] [2024-06-03 20:58:08,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:58:08,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:58:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:58:09,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:58:09,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:58:09,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696926275] [2024-06-03 20:58:09,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696926275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:58:09,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:58:09,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:58:09,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404819404] [2024-06-03 20:58:09,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:58:09,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:58:09,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:58:09,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:58:09,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:58:09,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:58:09,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 538 transitions, 7480 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) [2024-06-03 20:58:09,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:58:09,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:58:09,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:58:10,256 INFO L124 PetriNetUnfolderBase]: 2509/4419 cut-off events. [2024-06-03 20:58:10,257 INFO L125 PetriNetUnfolderBase]: For 900074/900074 co-relation queries the response was YES. [2024-06-03 20:58:10,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37278 conditions, 4419 events. 2509/4419 cut-off events. For 900074/900074 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 30239 event pairs, 443 based on Foata normal form. 1/4411 useless extension candidates. Maximal degree in co-relation 37077. Up to 3569 conditions per place. [2024-06-03 20:58:10,330 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 392 selfloop transitions, 174 changer transitions 0/575 dead transitions. [2024-06-03 20:58:10,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 575 transitions, 9328 flow [2024-06-03 20:58:10,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:58:10,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:58:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-06-03 20:58:10,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5840909090909091 [2024-06-03 20:58:10,332 INFO L175 Difference]: Start difference. First operand has 485 places, 538 transitions, 7480 flow. Second operand 10 states and 257 transitions. [2024-06-03 20:58:10,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 575 transitions, 9328 flow [2024-06-03 20:58:18,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 575 transitions, 8877 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-03 20:58:18,249 INFO L231 Difference]: Finished difference. Result has 484 places, 541 transitions, 7431 flow [2024-06-03 20:58:18,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7029, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7431, PETRI_PLACES=484, PETRI_TRANSITIONS=541} [2024-06-03 20:58:18,250 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 439 predicate places. [2024-06-03 20:58:18,250 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 541 transitions, 7431 flow [2024-06-03 20:58:18,250 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) [2024-06-03 20:58:18,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:58:18,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:58:18,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 20:58:18,250 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:58:18,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:58:18,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1836813194, now seen corresponding path program 11 times [2024-06-03 20:58:18,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:58:18,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93710968] [2024-06-03 20:58:18,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:58:18,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:58:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:58:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:58:18,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:58:18,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93710968] [2024-06-03 20:58:18,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93710968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:58:18,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:58:18,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:58:18,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559327980] [2024-06-03 20:58:18,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:58:18,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:58:18,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:58:18,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:58:18,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:58:18,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:58:18,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 541 transitions, 7431 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) [2024-06-03 20:58:18,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:58:18,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:58:18,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:58:19,647 INFO L124 PetriNetUnfolderBase]: 2514/4428 cut-off events. [2024-06-03 20:58:19,647 INFO L125 PetriNetUnfolderBase]: For 911125/911125 co-relation queries the response was YES. [2024-06-03 20:58:19,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37285 conditions, 4428 events. 2514/4428 cut-off events. For 911125/911125 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 30329 event pairs, 443 based on Foata normal form. 1/4420 useless extension candidates. Maximal degree in co-relation 37083. Up to 3575 conditions per place. [2024-06-03 20:58:19,722 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 394 selfloop transitions, 178 changer transitions 0/581 dead transitions. [2024-06-03 20:58:19,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 581 transitions, 9601 flow [2024-06-03 20:58:19,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:58:19,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:58:19,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 301 transitions. [2024-06-03 20:58:19,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5700757575757576 [2024-06-03 20:58:19,724 INFO L175 Difference]: Start difference. First operand has 484 places, 541 transitions, 7431 flow. Second operand 12 states and 301 transitions. [2024-06-03 20:58:19,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 581 transitions, 9601 flow [2024-06-03 20:58:26,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 581 transitions, 9138 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-03 20:58:26,242 INFO L231 Difference]: Finished difference. Result has 489 places, 544 transitions, 7384 flow [2024-06-03 20:58:26,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6984, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7384, PETRI_PLACES=489, PETRI_TRANSITIONS=544} [2024-06-03 20:58:26,243 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 444 predicate places. [2024-06-03 20:58:26,243 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 544 transitions, 7384 flow [2024-06-03 20:58:26,243 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) [2024-06-03 20:58:26,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:58:26,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:58:26,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-03 20:58:26,244 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:58:26,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:58:26,244 INFO L85 PathProgramCache]: Analyzing trace with hash 253252244, now seen corresponding path program 12 times [2024-06-03 20:58:26,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:58:26,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396573501] [2024-06-03 20:58:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:58:26,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:58:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:58:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:58:26,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:58:26,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396573501] [2024-06-03 20:58:26,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396573501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:58:26,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:58:26,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:58:26,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687929084] [2024-06-03 20:58:26,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:58:26,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:58:26,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:58:26,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:58:26,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:58:26,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:58:26,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 544 transitions, 7384 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) [2024-06-03 20:58:26,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:58:26,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:58:26,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:58:27,594 INFO L124 PetriNetUnfolderBase]: 2511/4424 cut-off events. [2024-06-03 20:58:27,594 INFO L125 PetriNetUnfolderBase]: For 911754/911754 co-relation queries the response was YES. [2024-06-03 20:58:27,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36976 conditions, 4424 events. 2511/4424 cut-off events. For 911754/911754 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 30347 event pairs, 443 based on Foata normal form. 1/4416 useless extension candidates. Maximal degree in co-relation 36773. Up to 3572 conditions per place. [2024-06-03 20:58:27,666 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 392 selfloop transitions, 180 changer transitions 0/581 dead transitions. [2024-06-03 20:58:27,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 581 transitions, 9210 flow [2024-06-03 20:58:27,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:58:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:58:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 317 transitions. [2024-06-03 20:58:27,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541958041958042 [2024-06-03 20:58:27,668 INFO L175 Difference]: Start difference. First operand has 489 places, 544 transitions, 7384 flow. Second operand 13 states and 317 transitions. [2024-06-03 20:58:27,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 581 transitions, 9210 flow [2024-06-03 20:58:34,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 581 transitions, 8816 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-03 20:58:34,392 INFO L231 Difference]: Finished difference. Result has 493 places, 544 transitions, 7356 flow [2024-06-03 20:58:34,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6990, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7356, PETRI_PLACES=493, PETRI_TRANSITIONS=544} [2024-06-03 20:58:34,392 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 448 predicate places. [2024-06-03 20:58:34,393 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 544 transitions, 7356 flow [2024-06-03 20:58:34,393 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) [2024-06-03 20:58:34,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:58:34,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:58:34,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-03 20:58:34,393 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:58:34,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:58:34,393 INFO L85 PathProgramCache]: Analyzing trace with hash -2130142538, now seen corresponding path program 13 times [2024-06-03 20:58:34,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:58:34,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33712403] [2024-06-03 20:58:34,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:58:34,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:58:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:58:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:58:34,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:58:34,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33712403] [2024-06-03 20:58:34,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33712403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:58:34,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:58:34,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:58:34,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075067926] [2024-06-03 20:58:34,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:58:34,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:58:34,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:58:34,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:58:34,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:58:34,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:58:34,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 544 transitions, 7356 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) [2024-06-03 20:58:34,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:58:34,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:58:34,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:58:35,799 INFO L124 PetriNetUnfolderBase]: 2532/4459 cut-off events. [2024-06-03 20:58:35,799 INFO L125 PetriNetUnfolderBase]: For 945873/945873 co-relation queries the response was YES. [2024-06-03 20:58:35,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37565 conditions, 4459 events. 2532/4459 cut-off events. For 945873/945873 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 30666 event pairs, 443 based on Foata normal form. 1/4451 useless extension candidates. Maximal degree in co-relation 37361. Up to 3596 conditions per place. [2024-06-03 20:58:35,873 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 388 selfloop transitions, 188 changer transitions 0/585 dead transitions. [2024-06-03 20:58:35,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 585 transitions, 9637 flow [2024-06-03 20:58:35,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:58:35,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:58:35,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 313 transitions. [2024-06-03 20:58:35,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472027972027972 [2024-06-03 20:58:35,874 INFO L175 Difference]: Start difference. First operand has 493 places, 544 transitions, 7356 flow. Second operand 13 states and 313 transitions. [2024-06-03 20:58:35,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 585 transitions, 9637 flow [2024-06-03 20:58:42,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 585 transitions, 9235 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-03 20:58:42,929 INFO L231 Difference]: Finished difference. Result has 493 places, 553 transitions, 7495 flow [2024-06-03 20:58:42,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6972, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7495, PETRI_PLACES=493, PETRI_TRANSITIONS=553} [2024-06-03 20:58:42,929 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 448 predicate places. [2024-06-03 20:58:42,929 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 553 transitions, 7495 flow [2024-06-03 20:58:42,929 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) [2024-06-03 20:58:42,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:58:42,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:58:42,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-03 20:58:42,930 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:58:42,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:58:42,930 INFO L85 PathProgramCache]: Analyzing trace with hash -2143475018, now seen corresponding path program 14 times [2024-06-03 20:58:42,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:58:42,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113546983] [2024-06-03 20:58:42,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:58:42,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:58:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:58:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:58:43,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:58:43,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113546983] [2024-06-03 20:58:43,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113546983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:58:43,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:58:43,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:58:43,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400558225] [2024-06-03 20:58:43,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:58:43,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:58:43,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:58:43,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:58:43,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:58:43,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:58:43,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 553 transitions, 7495 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) [2024-06-03 20:58:43,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:58:43,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:58:43,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:58:44,359 INFO L124 PetriNetUnfolderBase]: 2529/4455 cut-off events. [2024-06-03 20:58:44,360 INFO L125 PetriNetUnfolderBase]: For 946117/946117 co-relation queries the response was YES. [2024-06-03 20:58:44,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37464 conditions, 4455 events. 2529/4455 cut-off events. For 946117/946117 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 30601 event pairs, 443 based on Foata normal form. 1/4447 useless extension candidates. Maximal degree in co-relation 37260. Up to 3593 conditions per place. [2024-06-03 20:58:44,432 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 386 selfloop transitions, 187 changer transitions 0/582 dead transitions. [2024-06-03 20:58:44,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 582 transitions, 9311 flow [2024-06-03 20:58:44,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:58:44,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:58:44,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 272 transitions. [2024-06-03 20:58:44,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619834710743802 [2024-06-03 20:58:44,433 INFO L175 Difference]: Start difference. First operand has 493 places, 553 transitions, 7495 flow. Second operand 11 states and 272 transitions. [2024-06-03 20:58:44,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 582 transitions, 9311 flow [2024-06-03 20:58:51,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 582 transitions, 8965 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-03 20:58:51,355 INFO L231 Difference]: Finished difference. Result has 497 places, 553 transitions, 7529 flow [2024-06-03 20:58:51,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7149, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7529, PETRI_PLACES=497, PETRI_TRANSITIONS=553} [2024-06-03 20:58:51,356 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 452 predicate places. [2024-06-03 20:58:51,356 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 553 transitions, 7529 flow [2024-06-03 20:58:51,356 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) [2024-06-03 20:58:51,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:58:51,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:58:51,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-03 20:58:51,357 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:58:51,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:58:51,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1077520456, now seen corresponding path program 15 times [2024-06-03 20:58:51,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:58:51,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765781131] [2024-06-03 20:58:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:58:51,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:58:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:58:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:58:51,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:58:51,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765781131] [2024-06-03 20:58:51,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765781131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:58:51,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:58:51,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:58:51,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208514688] [2024-06-03 20:58:51,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:58:51,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:58:51,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:58:51,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:58:51,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:58:51,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:58:51,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 553 transitions, 7529 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) [2024-06-03 20:58:51,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:58:51,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:58:51,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:58:52,886 INFO L124 PetriNetUnfolderBase]: 2526/4458 cut-off events. [2024-06-03 20:58:52,886 INFO L125 PetriNetUnfolderBase]: For 947029/947029 co-relation queries the response was YES. [2024-06-03 20:58:52,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37362 conditions, 4458 events. 2526/4458 cut-off events. For 947029/947029 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 30631 event pairs, 431 based on Foata normal form. 1/4455 useless extension candidates. Maximal degree in co-relation 37156. Up to 3855 conditions per place. [2024-06-03 20:58:52,954 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 528 selfloop transitions, 31 changer transitions 0/568 dead transitions. [2024-06-03 20:58:52,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 568 transitions, 8683 flow [2024-06-03 20:58:52,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:58:52,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:58:52,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-03 20:58:52,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5397727272727273 [2024-06-03 20:58:52,956 INFO L175 Difference]: Start difference. First operand has 497 places, 553 transitions, 7529 flow. Second operand 8 states and 190 transitions. [2024-06-03 20:58:52,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 568 transitions, 8683 flow [2024-06-03 20:58:59,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 568 transitions, 8289 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-03 20:58:59,992 INFO L231 Difference]: Finished difference. Result has 495 places, 553 transitions, 7203 flow [2024-06-03 20:58:59,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7135, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7203, PETRI_PLACES=495, PETRI_TRANSITIONS=553} [2024-06-03 20:58:59,993 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 450 predicate places. [2024-06-03 20:58:59,993 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 553 transitions, 7203 flow [2024-06-03 20:58:59,993 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) [2024-06-03 20:58:59,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:58:59,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:58:59,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-03 20:58:59,994 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:58:59,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:58:59,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1962902602, now seen corresponding path program 24 times [2024-06-03 20:58:59,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:58:59,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778798932] [2024-06-03 20:58:59,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:58:59,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:59:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:59:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:59:00,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:59:00,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778798932] [2024-06-03 20:59:00,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778798932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:59:00,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:59:00,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:59:00,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057350916] [2024-06-03 20:59:00,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:59:00,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:59:00,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:59:00,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:59:00,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:59:00,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:59:00,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 553 transitions, 7203 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) [2024-06-03 20:59:00,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:59:00,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:59:00,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:59:01,552 INFO L124 PetriNetUnfolderBase]: 2539/4464 cut-off events. [2024-06-03 20:59:01,552 INFO L125 PetriNetUnfolderBase]: For 969739/969739 co-relation queries the response was YES. [2024-06-03 20:59:01,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37348 conditions, 4464 events. 2539/4464 cut-off events. For 969739/969739 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 30762 event pairs, 464 based on Foata normal form. 1/4452 useless extension candidates. Maximal degree in co-relation 37141. Up to 3526 conditions per place. [2024-06-03 20:59:01,620 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 350 selfloop transitions, 226 changer transitions 0/585 dead transitions. [2024-06-03 20:59:01,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 585 transitions, 9441 flow [2024-06-03 20:59:01,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:59:01,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:59:01,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 307 transitions. [2024-06-03 20:59:01,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367132867132867 [2024-06-03 20:59:01,621 INFO L175 Difference]: Start difference. First operand has 495 places, 553 transitions, 7203 flow. Second operand 13 states and 307 transitions. [2024-06-03 20:59:01,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 585 transitions, 9441 flow [2024-06-03 20:59:08,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 585 transitions, 9367 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:59:08,239 INFO L231 Difference]: Finished difference. Result has 501 places, 559 transitions, 7701 flow [2024-06-03 20:59:08,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7129, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7701, PETRI_PLACES=501, PETRI_TRANSITIONS=559} [2024-06-03 20:59:08,239 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 456 predicate places. [2024-06-03 20:59:08,239 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 559 transitions, 7701 flow [2024-06-03 20:59:08,240 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) [2024-06-03 20:59:08,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:59:08,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:59:08,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-03 20:59:08,240 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:59:08,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:59:08,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1347565428, now seen corresponding path program 25 times [2024-06-03 20:59:08,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:59:08,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796747500] [2024-06-03 20:59:08,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:59:08,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:59:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:59:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:59:08,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:59:08,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796747500] [2024-06-03 20:59:08,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796747500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:59:08,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:59:08,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:59:08,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462320591] [2024-06-03 20:59:08,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:59:08,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:59:08,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:59:08,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:59:08,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:59:08,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:59:08,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 559 transitions, 7701 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) [2024-06-03 20:59:08,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:59:08,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:59:08,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:59:09,834 INFO L124 PetriNetUnfolderBase]: 2544/4473 cut-off events. [2024-06-03 20:59:09,834 INFO L125 PetriNetUnfolderBase]: For 984324/984324 co-relation queries the response was YES. [2024-06-03 20:59:09,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37959 conditions, 4473 events. 2544/4473 cut-off events. For 984324/984324 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 30835 event pairs, 464 based on Foata normal form. 1/4461 useless extension candidates. Maximal degree in co-relation 37751. Up to 3532 conditions per place. [2024-06-03 20:59:09,902 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 349 selfloop transitions, 229 changer transitions 0/587 dead transitions. [2024-06-03 20:59:09,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 587 transitions, 9899 flow [2024-06-03 20:59:09,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:59:09,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:59:09,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 289 transitions. [2024-06-03 20:59:09,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5473484848484849 [2024-06-03 20:59:09,903 INFO L175 Difference]: Start difference. First operand has 501 places, 559 transitions, 7701 flow. Second operand 12 states and 289 transitions. [2024-06-03 20:59:09,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 587 transitions, 9899 flow [2024-06-03 20:59:19,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 587 transitions, 9257 flow, removed 31 selfloop flow, removed 11 redundant places. [2024-06-03 20:59:19,807 INFO L231 Difference]: Finished difference. Result has 502 places, 562 transitions, 7589 flow [2024-06-03 20:59:19,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7072, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7589, PETRI_PLACES=502, PETRI_TRANSITIONS=562} [2024-06-03 20:59:19,807 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 457 predicate places. [2024-06-03 20:59:19,807 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 562 transitions, 7589 flow [2024-06-03 20:59:19,808 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) [2024-06-03 20:59:19,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:59:19,808 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, 1, 1] [2024-06-03 20:59:19,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-03 20:59:19,808 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:59:19,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:59:19,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1307788612, now seen corresponding path program 26 times [2024-06-03 20:59:19,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:59:19,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594898474] [2024-06-03 20:59:19,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:59:19,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:59:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:59:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:59:20,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:59:20,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594898474] [2024-06-03 20:59:20,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594898474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:59:20,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:59:20,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:59:20,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218355734] [2024-06-03 20:59:20,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:59:20,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:59:20,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:59:20,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:59:20,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:59:20,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:59:20,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 562 transitions, 7589 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) [2024-06-03 20:59:20,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:59:20,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:59:20,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:59:21,389 INFO L124 PetriNetUnfolderBase]: 2541/4469 cut-off events. [2024-06-03 20:59:21,389 INFO L125 PetriNetUnfolderBase]: For 982504/982504 co-relation queries the response was YES. [2024-06-03 20:59:21,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37707 conditions, 4469 events. 2541/4469 cut-off events. For 982504/982504 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 30755 event pairs, 464 based on Foata normal form. 1/4457 useless extension candidates. Maximal degree in co-relation 37498. Up to 3529 conditions per place. [2024-06-03 20:59:21,455 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 348 selfloop transitions, 228 changer transitions 0/585 dead transitions. [2024-06-03 20:59:21,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 585 transitions, 9411 flow [2024-06-03 20:59:21,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:59:21,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:59:21,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-06-03 20:59:21,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5495867768595041 [2024-06-03 20:59:21,457 INFO L175 Difference]: Start difference. First operand has 502 places, 562 transitions, 7589 flow. Second operand 11 states and 266 transitions. [2024-06-03 20:59:21,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 585 transitions, 9411 flow [2024-06-03 20:59:28,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 585 transitions, 8649 flow, removed 29 selfloop flow, removed 13 redundant places. [2024-06-03 20:59:28,352 INFO L231 Difference]: Finished difference. Result has 500 places, 562 transitions, 7289 flow [2024-06-03 20:59:28,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6827, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7289, PETRI_PLACES=500, PETRI_TRANSITIONS=562} [2024-06-03 20:59:28,353 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 455 predicate places. [2024-06-03 20:59:28,353 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 562 transitions, 7289 flow [2024-06-03 20:59:28,353 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) [2024-06-03 20:59:28,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:59:28,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:59:28,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-03 20:59:28,354 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:59:28,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:59:28,354 INFO L85 PathProgramCache]: Analyzing trace with hash -986551146, now seen corresponding path program 27 times [2024-06-03 20:59:28,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:59:28,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506869883] [2024-06-03 20:59:28,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:59:28,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:59:28,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:59:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:59:28,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:59:28,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506869883] [2024-06-03 20:59:28,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506869883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:59:28,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:59:28,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:59:28,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423080235] [2024-06-03 20:59:28,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:59:28,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:59:28,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:59:28,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:59:28,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:59:28,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:59:28,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 562 transitions, 7289 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) [2024-06-03 20:59:28,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:59:28,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:59:28,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:59:29,755 INFO L124 PetriNetUnfolderBase]: 2538/4465 cut-off events. [2024-06-03 20:59:29,756 INFO L125 PetriNetUnfolderBase]: For 979728/979728 co-relation queries the response was YES. [2024-06-03 20:59:29,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37399 conditions, 4465 events. 2538/4465 cut-off events. For 979728/979728 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 30776 event pairs, 464 based on Foata normal form. 1/4453 useless extension candidates. Maximal degree in co-relation 37189. Up to 3526 conditions per place. [2024-06-03 20:59:29,830 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 341 selfloop transitions, 235 changer transitions 0/585 dead transitions. [2024-06-03 20:59:29,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 585 transitions, 8805 flow [2024-06-03 20:59:29,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:59:29,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:59:29,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 282 transitions. [2024-06-03 20:59:29,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2024-06-03 20:59:29,832 INFO L175 Difference]: Start difference. First operand has 500 places, 562 transitions, 7289 flow. Second operand 12 states and 282 transitions. [2024-06-03 20:59:29,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 585 transitions, 8805 flow [2024-06-03 20:59:35,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 585 transitions, 8323 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-03 20:59:35,676 INFO L231 Difference]: Finished difference. Result has 502 places, 562 transitions, 7283 flow [2024-06-03 20:59:35,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6807, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7283, PETRI_PLACES=502, PETRI_TRANSITIONS=562} [2024-06-03 20:59:35,677 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 457 predicate places. [2024-06-03 20:59:35,677 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 562 transitions, 7283 flow [2024-06-03 20:59:35,677 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) [2024-06-03 20:59:35,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:59:35,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:59:35,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-03 20:59:35,678 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:59:35,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:59:35,678 INFO L85 PathProgramCache]: Analyzing trace with hash -403752746, now seen corresponding path program 28 times [2024-06-03 20:59:35,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:59:35,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938143825] [2024-06-03 20:59:35,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:59:35,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:59:35,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:59:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:59:36,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:59:36,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938143825] [2024-06-03 20:59:36,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938143825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:59:36,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:59:36,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:59:36,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210541441] [2024-06-03 20:59:36,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:59:36,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:59:36,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:59:36,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:59:36,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:59:36,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:59:36,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 562 transitions, 7283 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) [2024-06-03 20:59:36,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:59:36,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:59:36,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:59:37,137 INFO L124 PetriNetUnfolderBase]: 2535/4461 cut-off events. [2024-06-03 20:59:37,137 INFO L125 PetriNetUnfolderBase]: For 979518/979518 co-relation queries the response was YES. [2024-06-03 20:59:37,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37285 conditions, 4461 events. 2535/4461 cut-off events. For 979518/979518 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 30718 event pairs, 464 based on Foata normal form. 1/4449 useless extension candidates. Maximal degree in co-relation 37074. Up to 3523 conditions per place. [2024-06-03 20:59:37,218 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 346 selfloop transitions, 231 changer transitions 0/586 dead transitions. [2024-06-03 20:59:37,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 586 transitions, 8805 flow [2024-06-03 20:59:37,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:59:37,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:59:37,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 304 transitions. [2024-06-03 20:59:37,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314685314685315 [2024-06-03 20:59:37,220 INFO L175 Difference]: Start difference. First operand has 502 places, 562 transitions, 7283 flow. Second operand 13 states and 304 transitions. [2024-06-03 20:59:37,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 586 transitions, 8805 flow [2024-06-03 20:59:43,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 586 transitions, 8319 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-03 20:59:43,579 INFO L231 Difference]: Finished difference. Result has 505 places, 562 transitions, 7265 flow [2024-06-03 20:59:43,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6797, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7265, PETRI_PLACES=505, PETRI_TRANSITIONS=562} [2024-06-03 20:59:43,579 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 460 predicate places. [2024-06-03 20:59:43,580 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 562 transitions, 7265 flow [2024-06-03 20:59:43,580 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) [2024-06-03 20:59:43,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:59:43,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:59:43,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-03 20:59:43,580 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:59:43,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:59:43,581 INFO L85 PathProgramCache]: Analyzing trace with hash -581121416, now seen corresponding path program 29 times [2024-06-03 20:59:43,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:59:43,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398011878] [2024-06-03 20:59:43,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:59:43,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:59:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:59:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:59:43,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:59:43,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398011878] [2024-06-03 20:59:43,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398011878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:59:43,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:59:43,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:59:43,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886164326] [2024-06-03 20:59:43,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:59:43,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:59:43,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:59:43,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:59:43,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:59:44,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:59:44,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 562 transitions, 7265 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) [2024-06-03 20:59:44,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:59:44,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:59:44,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:59:45,009 INFO L124 PetriNetUnfolderBase]: 2532/4465 cut-off events. [2024-06-03 20:59:45,010 INFO L125 PetriNetUnfolderBase]: For 978810/978810 co-relation queries the response was YES. [2024-06-03 20:59:45,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37151 conditions, 4465 events. 2532/4465 cut-off events. For 978810/978810 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 30779 event pairs, 443 based on Foata normal form. 1/4458 useless extension candidates. Maximal degree in co-relation 36939. Up to 3841 conditions per place. [2024-06-03 20:59:45,088 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 531 selfloop transitions, 33 changer transitions 0/573 dead transitions. [2024-06-03 20:59:45,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 573 transitions, 8419 flow [2024-06-03 20:59:45,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:59:45,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:59:45,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:59:45,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2024-06-03 20:59:45,089 INFO L175 Difference]: Start difference. First operand has 505 places, 562 transitions, 7265 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:59:45,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 573 transitions, 8419 flow [2024-06-03 20:59:51,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 573 transitions, 7909 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-06-03 20:59:51,943 INFO L231 Difference]: Finished difference. Result has 500 places, 562 transitions, 6831 flow [2024-06-03 20:59:51,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6755, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6831, PETRI_PLACES=500, PETRI_TRANSITIONS=562} [2024-06-03 20:59:51,943 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 455 predicate places. [2024-06-03 20:59:51,943 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 562 transitions, 6831 flow [2024-06-03 20:59:51,943 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) [2024-06-03 20:59:51,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:59:51,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:59:51,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-03 20:59:51,944 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:59:51,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:59:51,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1347572372, now seen corresponding path program 16 times [2024-06-03 20:59:51,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:59:51,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050356084] [2024-06-03 20:59:51,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:59:51,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:59:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:59:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:59:52,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:59:52,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050356084] [2024-06-03 20:59:52,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050356084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:59:52,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:59:52,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:59:52,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097106361] [2024-06-03 20:59:52,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:59:52,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:59:52,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:59:52,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:59:52,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:59:52,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 20:59:52,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 562 transitions, 6831 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) [2024-06-03 20:59:52,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:59:52,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 20:59:52,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:59:53,368 INFO L124 PetriNetUnfolderBase]: 2537/4472 cut-off events. [2024-06-03 20:59:53,368 INFO L125 PetriNetUnfolderBase]: For 989423/989423 co-relation queries the response was YES. [2024-06-03 20:59:53,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36790 conditions, 4472 events. 2537/4472 cut-off events. For 989423/989423 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 30790 event pairs, 448 based on Foata normal form. 1/4464 useless extension candidates. Maximal degree in co-relation 36577. Up to 3605 conditions per place. [2024-06-03 20:59:53,442 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 392 selfloop transitions, 189 changer transitions 0/590 dead transitions. [2024-06-03 20:59:53,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 590 transitions, 9050 flow [2024-06-03 20:59:53,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:59:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:59:53,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 287 transitions. [2024-06-03 20:59:53,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435606060606061 [2024-06-03 20:59:53,443 INFO L175 Difference]: Start difference. First operand has 500 places, 562 transitions, 6831 flow. Second operand 12 states and 287 transitions. [2024-06-03 20:59:53,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 590 transitions, 9050 flow [2024-06-03 21:00:00,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 590 transitions, 8980 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 21:00:00,410 INFO L231 Difference]: Finished difference. Result has 506 places, 565 transitions, 7202 flow [2024-06-03 21:00:00,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6767, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7202, PETRI_PLACES=506, PETRI_TRANSITIONS=565} [2024-06-03 21:00:00,411 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 461 predicate places. [2024-06-03 21:00:00,411 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 565 transitions, 7202 flow [2024-06-03 21:00:00,411 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) [2024-06-03 21:00:00,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:00:00,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:00:00,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-03 21:00:00,412 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:00:00,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:00:00,412 INFO L85 PathProgramCache]: Analyzing trace with hash -380035402, now seen corresponding path program 17 times [2024-06-03 21:00:00,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:00:00,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766952076] [2024-06-03 21:00:00,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:00:00,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:00:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:00:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:00:00,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:00:00,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766952076] [2024-06-03 21:00:00,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766952076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:00:00,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:00:00,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 21:00:00,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123065318] [2024-06-03 21:00:00,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:00:00,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 21:00:00,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:00:00,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 21:00:00,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 21:00:00,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:00:00,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 565 transitions, 7202 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) [2024-06-03 21:00:00,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:00:00,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:00:00,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:00:01,895 INFO L124 PetriNetUnfolderBase]: 2550/4494 cut-off events. [2024-06-03 21:00:01,895 INFO L125 PetriNetUnfolderBase]: For 1003707/1003707 co-relation queries the response was YES. [2024-06-03 21:00:01,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37453 conditions, 4494 events. 2550/4494 cut-off events. For 1003707/1003707 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 31033 event pairs, 448 based on Foata normal form. 1/4486 useless extension candidates. Maximal degree in co-relation 37240. Up to 3620 conditions per place. [2024-06-03 21:00:01,974 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 390 selfloop transitions, 198 changer transitions 0/597 dead transitions. [2024-06-03 21:00:01,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 597 transitions, 9498 flow [2024-06-03 21:00:01,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 21:00:01,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 21:00:01,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 305 transitions. [2024-06-03 21:00:01,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5332167832167832 [2024-06-03 21:00:01,975 INFO L175 Difference]: Start difference. First operand has 506 places, 565 transitions, 7202 flow. Second operand 13 states and 305 transitions. [2024-06-03 21:00:01,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 597 transitions, 9498 flow [2024-06-03 21:00:08,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 597 transitions, 8934 flow, removed 23 selfloop flow, removed 11 redundant places. [2024-06-03 21:00:08,686 INFO L231 Difference]: Finished difference. Result has 508 places, 571 transitions, 7152 flow [2024-06-03 21:00:08,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6658, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7152, PETRI_PLACES=508, PETRI_TRANSITIONS=571} [2024-06-03 21:00:08,686 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 463 predicate places. [2024-06-03 21:00:08,687 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 571 transitions, 7152 flow [2024-06-03 21:00:08,687 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) [2024-06-03 21:00:08,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:00:08,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:00:08,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-03 21:00:08,687 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:00:08,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:00:08,688 INFO L85 PathProgramCache]: Analyzing trace with hash -393367882, now seen corresponding path program 18 times [2024-06-03 21:00:08,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:00:08,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736016863] [2024-06-03 21:00:08,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:00:08,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:00:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:00:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:00:09,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:00:09,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736016863] [2024-06-03 21:00:09,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736016863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:00:09,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:00:09,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 21:00:09,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653626988] [2024-06-03 21:00:09,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:00:09,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 21:00:09,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:00:09,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 21:00:09,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 21:00:09,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:00:09,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 571 transitions, 7152 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) [2024-06-03 21:00:09,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:00:09,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:00:09,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:00:10,146 INFO L124 PetriNetUnfolderBase]: 2547/4490 cut-off events. [2024-06-03 21:00:10,147 INFO L125 PetriNetUnfolderBase]: For 1001758/1001758 co-relation queries the response was YES. [2024-06-03 21:00:10,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37214 conditions, 4490 events. 2547/4490 cut-off events. For 1001758/1001758 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 30940 event pairs, 448 based on Foata normal form. 1/4482 useless extension candidates. Maximal degree in co-relation 37000. Up to 3617 conditions per place. [2024-06-03 21:00:10,235 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 388 selfloop transitions, 197 changer transitions 0/594 dead transitions. [2024-06-03 21:00:10,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 594 transitions, 9012 flow [2024-06-03 21:00:10,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 21:00:10,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 21:00:10,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 264 transitions. [2024-06-03 21:00:10,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-03 21:00:10,236 INFO L175 Difference]: Start difference. First operand has 508 places, 571 transitions, 7152 flow. Second operand 11 states and 264 transitions. [2024-06-03 21:00:10,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 594 transitions, 9012 flow [2024-06-03 21:00:17,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 594 transitions, 8544 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-06-03 21:00:17,879 INFO L231 Difference]: Finished difference. Result has 509 places, 571 transitions, 7084 flow [2024-06-03 21:00:17,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6684, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7084, PETRI_PLACES=509, PETRI_TRANSITIONS=571} [2024-06-03 21:00:17,880 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 464 predicate places. [2024-06-03 21:00:17,880 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 571 transitions, 7084 flow [2024-06-03 21:00:17,880 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) [2024-06-03 21:00:17,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:00:17,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:00:17,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-03 21:00:17,880 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:00:17,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:00:17,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1208277686, now seen corresponding path program 19 times [2024-06-03 21:00:17,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:00:17,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059807799] [2024-06-03 21:00:17,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:00:17,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:00:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:00:18,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:00:18,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:00:18,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059807799] [2024-06-03 21:00:18,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059807799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:00:18,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:00:18,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 21:00:18,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128994100] [2024-06-03 21:00:18,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:00:18,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 21:00:18,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:00:18,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 21:00:18,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 21:00:18,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:00:18,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 571 transitions, 7084 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) [2024-06-03 21:00:18,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:00:18,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:00:18,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:00:19,334 INFO L124 PetriNetUnfolderBase]: 2552/4508 cut-off events. [2024-06-03 21:00:19,335 INFO L125 PetriNetUnfolderBase]: For 1013143/1013143 co-relation queries the response was YES. [2024-06-03 21:00:19,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37279 conditions, 4508 events. 2552/4508 cut-off events. For 1013143/1013143 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 31098 event pairs, 433 based on Foata normal form. 1/4505 useless extension candidates. Maximal degree in co-relation 37064. Up to 3892 conditions per place. [2024-06-03 21:00:19,413 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 546 selfloop transitions, 31 changer transitions 0/586 dead transitions. [2024-06-03 21:00:19,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 586 transitions, 8315 flow [2024-06-03 21:00:19,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 21:00:19,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 21:00:19,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-03 21:00:19,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-03 21:00:19,414 INFO L175 Difference]: Start difference. First operand has 509 places, 571 transitions, 7084 flow. Second operand 8 states and 187 transitions. [2024-06-03 21:00:19,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 586 transitions, 8315 flow [2024-06-03 21:00:26,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 586 transitions, 7915 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-03 21:00:26,042 INFO L231 Difference]: Finished difference. Result has 507 places, 574 transitions, 6807 flow [2024-06-03 21:00:26,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6690, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6807, PETRI_PLACES=507, PETRI_TRANSITIONS=574} [2024-06-03 21:00:26,042 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 462 predicate places. [2024-06-03 21:00:26,042 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 574 transitions, 6807 flow [2024-06-03 21:00:26,043 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) [2024-06-03 21:00:26,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:00:26,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:00:26,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-03 21:00:26,043 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:00:26,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:00:26,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1360904852, now seen corresponding path program 20 times [2024-06-03 21:00:26,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:00:26,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723210106] [2024-06-03 21:00:26,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:00:26,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:00:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:00:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:00:26,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:00:26,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723210106] [2024-06-03 21:00:26,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723210106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:00:26,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:00:26,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 21:00:26,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816010808] [2024-06-03 21:00:26,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:00:26,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 21:00:26,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:00:26,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 21:00:26,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 21:00:26,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:00:26,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 574 transitions, 6807 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) [2024-06-03 21:00:26,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:00:26,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:00:26,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:00:27,471 INFO L124 PetriNetUnfolderBase]: 2565/4521 cut-off events. [2024-06-03 21:00:27,471 INFO L125 PetriNetUnfolderBase]: For 1037337/1037337 co-relation queries the response was YES. [2024-06-03 21:00:27,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37264 conditions, 4521 events. 2565/4521 cut-off events. For 1037337/1037337 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 31250 event pairs, 448 based on Foata normal form. 1/4513 useless extension candidates. Maximal degree in co-relation 37048. Up to 3638 conditions per place. [2024-06-03 21:00:27,549 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 391 selfloop transitions, 206 changer transitions 0/606 dead transitions. [2024-06-03 21:00:27,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 606 transitions, 9108 flow [2024-06-03 21:00:27,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 21:00:27,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 21:00:27,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 306 transitions. [2024-06-03 21:00:27,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.534965034965035 [2024-06-03 21:00:27,550 INFO L175 Difference]: Start difference. First operand has 507 places, 574 transitions, 6807 flow. Second operand 13 states and 306 transitions. [2024-06-03 21:00:27,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 606 transitions, 9108 flow [2024-06-03 21:00:35,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 606 transitions, 9022 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 21:00:35,860 INFO L231 Difference]: Finished difference. Result has 514 places, 580 transitions, 7220 flow [2024-06-03 21:00:35,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6721, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7220, PETRI_PLACES=514, PETRI_TRANSITIONS=580} [2024-06-03 21:00:35,861 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 469 predicate places. [2024-06-03 21:00:35,861 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 580 transitions, 7220 flow [2024-06-03 21:00:35,861 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) [2024-06-03 21:00:35,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:00:35,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:00:35,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-03 21:00:35,862 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:00:35,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:00:35,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1002824340, now seen corresponding path program 21 times [2024-06-03 21:00:35,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:00:35,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850318213] [2024-06-03 21:00:35,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:00:35,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:00:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:00:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:00:36,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:00:36,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850318213] [2024-06-03 21:00:36,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850318213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:00:36,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:00:36,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 21:00:36,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431252296] [2024-06-03 21:00:36,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:00:36,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 21:00:36,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:00:36,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 21:00:36,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 21:00:36,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:00:36,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 580 transitions, 7220 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) [2024-06-03 21:00:36,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:00:36,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:00:36,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:00:37,348 INFO L124 PetriNetUnfolderBase]: 2570/4532 cut-off events. [2024-06-03 21:00:37,348 INFO L125 PetriNetUnfolderBase]: For 1050891/1050891 co-relation queries the response was YES. [2024-06-03 21:00:37,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37772 conditions, 4532 events. 2570/4532 cut-off events. For 1050891/1050891 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 31343 event pairs, 443 based on Foata normal form. 1/4525 useless extension candidates. Maximal degree in co-relation 37555. Up to 3875 conditions per place. [2024-06-03 21:00:37,427 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 543 selfloop transitions, 42 changer transitions 0/594 dead transitions. [2024-06-03 21:00:37,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 594 transitions, 8463 flow [2024-06-03 21:00:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 21:00:37,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 21:00:37,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-03 21:00:37,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-03 21:00:37,429 INFO L175 Difference]: Start difference. First operand has 514 places, 580 transitions, 7220 flow. Second operand 7 states and 172 transitions. [2024-06-03 21:00:37,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 594 transitions, 8463 flow [2024-06-03 21:00:45,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 594 transitions, 8042 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-03 21:00:45,446 INFO L231 Difference]: Finished difference. Result has 512 places, 583 transitions, 6946 flow [2024-06-03 21:00:45,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6802, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6946, PETRI_PLACES=512, PETRI_TRANSITIONS=583} [2024-06-03 21:00:45,446 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 467 predicate places. [2024-06-03 21:00:45,446 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 583 transitions, 6946 flow [2024-06-03 21:00:45,447 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) [2024-06-03 21:00:45,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:00:45,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:00:45,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-03 21:00:45,447 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:00:45,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:00:45,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1007585940, now seen corresponding path program 22 times [2024-06-03 21:00:45,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:00:45,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46644940] [2024-06-03 21:00:45,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:00:45,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:00:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:00:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:00:45,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:00:45,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46644940] [2024-06-03 21:00:45,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46644940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:00:45,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:00:45,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 21:00:45,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686758572] [2024-06-03 21:00:45,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:00:45,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 21:00:45,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:00:45,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 21:00:45,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 21:00:45,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:00:45,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 583 transitions, 6946 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) [2024-06-03 21:00:45,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:00:45,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:00:45,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:00:46,894 INFO L124 PetriNetUnfolderBase]: 2575/4539 cut-off events. [2024-06-03 21:00:46,894 INFO L125 PetriNetUnfolderBase]: For 1062310/1062310 co-relation queries the response was YES. [2024-06-03 21:00:46,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37520 conditions, 4539 events. 2575/4539 cut-off events. For 1062310/1062310 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 31380 event pairs, 448 based on Foata normal form. 1/4531 useless extension candidates. Maximal degree in co-relation 37302. Up to 3650 conditions per place. [2024-06-03 21:00:46,976 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 388 selfloop transitions, 214 changer transitions 0/611 dead transitions. [2024-06-03 21:00:46,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 611 transitions, 8903 flow [2024-06-03 21:00:46,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 21:00:46,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 21:00:46,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 305 transitions. [2024-06-03 21:00:46,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5332167832167832 [2024-06-03 21:00:46,978 INFO L175 Difference]: Start difference. First operand has 512 places, 583 transitions, 6946 flow. Second operand 13 states and 305 transitions. [2024-06-03 21:00:46,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 611 transitions, 8903 flow [2024-06-03 21:00:56,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 611 transitions, 8791 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 21:00:56,331 INFO L231 Difference]: Finished difference. Result has 519 places, 586 transitions, 7315 flow [2024-06-03 21:00:56,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6838, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7315, PETRI_PLACES=519, PETRI_TRANSITIONS=586} [2024-06-03 21:00:56,332 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 474 predicate places. [2024-06-03 21:00:56,332 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 586 transitions, 7315 flow [2024-06-03 21:00:56,332 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) [2024-06-03 21:00:56,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:00:56,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:00:56,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-03 21:00:56,333 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:00:56,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:00:56,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1066642068, now seen corresponding path program 23 times [2024-06-03 21:00:56,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:00:56,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498555576] [2024-06-03 21:00:56,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:00:56,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:00:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:00:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:00:56,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:00:56,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498555576] [2024-06-03 21:00:56,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498555576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:00:56,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:00:56,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 21:00:56,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103094464] [2024-06-03 21:00:56,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:00:56,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 21:00:56,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:00:56,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 21:00:56,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 21:00:56,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:00:56,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 586 transitions, 7315 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) [2024-06-03 21:00:56,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:00:56,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:00:56,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:00:57,805 INFO L124 PetriNetUnfolderBase]: 2572/4537 cut-off events. [2024-06-03 21:00:57,805 INFO L125 PetriNetUnfolderBase]: For 1050112/1050112 co-relation queries the response was YES. [2024-06-03 21:00:57,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37700 conditions, 4537 events. 2572/4537 cut-off events. For 1050112/1050112 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 31388 event pairs, 443 based on Foata normal form. 1/4530 useless extension candidates. Maximal degree in co-relation 37482. Up to 3859 conditions per place. [2024-06-03 21:00:57,881 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 531 selfloop transitions, 58 changer transitions 0/598 dead transitions. [2024-06-03 21:00:57,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 598 transitions, 8847 flow [2024-06-03 21:00:57,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 21:00:57,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 21:00:57,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-03 21:00:57,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564935064935065 [2024-06-03 21:00:57,882 INFO L175 Difference]: Start difference. First operand has 519 places, 586 transitions, 7315 flow. Second operand 7 states and 174 transitions. [2024-06-03 21:00:57,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 598 transitions, 8847 flow [2024-06-03 21:01:04,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 598 transitions, 8446 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-03 21:01:04,893 INFO L231 Difference]: Finished difference. Result has 517 places, 586 transitions, 7040 flow [2024-06-03 21:01:04,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6914, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7040, PETRI_PLACES=517, PETRI_TRANSITIONS=586} [2024-06-03 21:01:04,893 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 472 predicate places. [2024-06-03 21:01:04,893 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 586 transitions, 7040 flow [2024-06-03 21:01:04,894 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) [2024-06-03 21:01:04,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:01:04,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:01:04,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-03 21:01:04,894 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:01:04,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:01:04,894 INFO L85 PathProgramCache]: Analyzing trace with hash -2059141322, now seen corresponding path program 24 times [2024-06-03 21:01:04,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:01:04,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944410942] [2024-06-03 21:01:04,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:01:04,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:01:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:01:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:01:05,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:01:05,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944410942] [2024-06-03 21:01:05,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944410942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:01:05,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:01:05,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 21:01:05,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227751138] [2024-06-03 21:01:05,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:01:05,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 21:01:05,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:01:05,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 21:01:05,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 21:01:05,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:01:05,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 586 transitions, 7040 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) [2024-06-03 21:01:05,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:01:05,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:01:05,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:01:06,419 INFO L124 PetriNetUnfolderBase]: 2569/4540 cut-off events. [2024-06-03 21:01:06,420 INFO L125 PetriNetUnfolderBase]: For 1047760/1047760 co-relation queries the response was YES. [2024-06-03 21:01:06,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37245 conditions, 4540 events. 2569/4540 cut-off events. For 1047760/1047760 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 31416 event pairs, 433 based on Foata normal form. 1/4537 useless extension candidates. Maximal degree in co-relation 37026. Up to 3887 conditions per place. [2024-06-03 21:01:06,642 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 537 selfloop transitions, 55 changer transitions 0/601 dead transitions. [2024-06-03 21:01:06,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 601 transitions, 8586 flow [2024-06-03 21:01:06,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 21:01:06,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 21:01:06,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-03 21:01:06,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-06-03 21:01:06,643 INFO L175 Difference]: Start difference. First operand has 517 places, 586 transitions, 7040 flow. Second operand 10 states and 230 transitions. [2024-06-03 21:01:06,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 601 transitions, 8586 flow [2024-06-03 21:01:13,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 601 transitions, 8474 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 21:01:13,892 INFO L231 Difference]: Finished difference. Result has 522 places, 586 transitions, 7046 flow [2024-06-03 21:01:13,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6930, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7046, PETRI_PLACES=522, PETRI_TRANSITIONS=586} [2024-06-03 21:01:13,893 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 477 predicate places. [2024-06-03 21:01:13,893 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 586 transitions, 7046 flow [2024-06-03 21:01:13,893 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) [2024-06-03 21:01:13,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:01:13,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:01:13,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-03 21:01:13,893 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:01:13,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:01:13,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1799943532, now seen corresponding path program 25 times [2024-06-03 21:01:13,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:01:13,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191595327] [2024-06-03 21:01:13,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:01:13,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:01:13,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:01:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:01:14,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:01:14,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191595327] [2024-06-03 21:01:14,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191595327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:01:14,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:01:14,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 21:01:14,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932497107] [2024-06-03 21:01:14,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:01:14,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 21:01:14,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:01:14,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 21:01:14,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 21:01:14,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:01:14,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 586 transitions, 7046 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) [2024-06-03 21:01:14,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:01:14,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:01:14,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:01:15,416 INFO L124 PetriNetUnfolderBase]: 2566/4536 cut-off events. [2024-06-03 21:01:15,416 INFO L125 PetriNetUnfolderBase]: For 1034399/1034399 co-relation queries the response was YES. [2024-06-03 21:01:15,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37043 conditions, 4536 events. 2566/4536 cut-off events. For 1034399/1034399 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 31446 event pairs, 433 based on Foata normal form. 1/4533 useless extension candidates. Maximal degree in co-relation 36824. Up to 3884 conditions per place. [2024-06-03 21:01:15,486 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 536 selfloop transitions, 54 changer transitions 0/599 dead transitions. [2024-06-03 21:01:15,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 599 transitions, 8584 flow [2024-06-03 21:01:15,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 21:01:15,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 21:01:15,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-03 21:01:15,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5397727272727273 [2024-06-03 21:01:15,488 INFO L175 Difference]: Start difference. First operand has 522 places, 586 transitions, 7046 flow. Second operand 8 states and 190 transitions. [2024-06-03 21:01:15,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 599 transitions, 8584 flow [2024-06-03 21:01:22,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 599 transitions, 8426 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-03 21:01:22,080 INFO L231 Difference]: Finished difference. Result has 522 places, 586 transitions, 7002 flow [2024-06-03 21:01:22,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6888, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7002, PETRI_PLACES=522, PETRI_TRANSITIONS=586} [2024-06-03 21:01:22,081 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 477 predicate places. [2024-06-03 21:01:22,081 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 586 transitions, 7002 flow [2024-06-03 21:01:22,081 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) [2024-06-03 21:01:22,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:01:22,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:01:22,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-03 21:01:22,082 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:01:22,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:01:22,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1416648954, now seen corresponding path program 26 times [2024-06-03 21:01:22,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:01:22,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938041283] [2024-06-03 21:01:22,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:01:22,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:01:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:01:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:01:22,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:01:22,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938041283] [2024-06-03 21:01:22,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938041283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:01:22,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:01:22,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 21:01:22,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24313724] [2024-06-03 21:01:22,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:01:22,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 21:01:22,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:01:22,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 21:01:22,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 21:01:22,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:01:22,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 586 transitions, 7002 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) [2024-06-03 21:01:22,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:01:22,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:01:22,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:01:23,756 INFO L124 PetriNetUnfolderBase]: 2563/4535 cut-off events. [2024-06-03 21:01:23,756 INFO L125 PetriNetUnfolderBase]: For 1032521/1032521 co-relation queries the response was YES. [2024-06-03 21:01:23,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36879 conditions, 4535 events. 2563/4535 cut-off events. For 1032521/1032521 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 31395 event pairs, 429 based on Foata normal form. 1/4534 useless extension candidates. Maximal degree in co-relation 36659. Up to 3926 conditions per place. [2024-06-03 21:01:23,833 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 567 selfloop transitions, 21 changer transitions 0/597 dead transitions. [2024-06-03 21:01:23,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 597 transitions, 8204 flow [2024-06-03 21:01:23,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 21:01:23,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 21:01:23,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 21:01:23,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 21:01:23,834 INFO L175 Difference]: Start difference. First operand has 522 places, 586 transitions, 7002 flow. Second operand 7 states and 165 transitions. [2024-06-03 21:01:23,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 597 transitions, 8204 flow [2024-06-03 21:01:30,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 597 transitions, 7971 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-03 21:01:30,813 INFO L231 Difference]: Finished difference. Result has 520 places, 586 transitions, 6821 flow [2024-06-03 21:01:30,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6769, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6821, PETRI_PLACES=520, PETRI_TRANSITIONS=586} [2024-06-03 21:01:30,813 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 475 predicate places. [2024-06-03 21:01:30,813 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 586 transitions, 6821 flow [2024-06-03 21:01:30,813 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) [2024-06-03 21:01:30,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:01:30,814 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, 1] [2024-06-03 21:01:30,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-03 21:01:30,814 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:01:30,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:01:30,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1063782132, now seen corresponding path program 3 times [2024-06-03 21:01:30,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:01:30,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226109458] [2024-06-03 21:01:30,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:01:30,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:01:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:01:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:01:31,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:01:31,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226109458] [2024-06-03 21:01:31,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226109458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:01:31,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:01:31,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 21:01:31,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923712749] [2024-06-03 21:01:31,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:01:31,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 21:01:31,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:01:31,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 21:01:31,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 21:01:31,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:01:31,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 586 transitions, 6821 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) [2024-06-03 21:01:31,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:01:31,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:01:31,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:01:32,362 INFO L124 PetriNetUnfolderBase]: 2550/4502 cut-off events. [2024-06-03 21:01:32,362 INFO L125 PetriNetUnfolderBase]: For 1027032/1027032 co-relation queries the response was YES. [2024-06-03 21:01:32,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35253 conditions, 4502 events. 2550/4502 cut-off events. For 1027032/1027032 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 31130 event pairs, 428 based on Foata normal form. 6/4500 useless extension candidates. Maximal degree in co-relation 35033. Up to 3739 conditions per place. [2024-06-03 21:01:32,434 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 557 selfloop transitions, 39 changer transitions 0/605 dead transitions. [2024-06-03 21:01:32,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 605 transitions, 8147 flow [2024-06-03 21:01:32,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 21:01:32,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 21:01:32,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-03 21:01:32,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-03 21:01:32,435 INFO L175 Difference]: Start difference. First operand has 520 places, 586 transitions, 6821 flow. Second operand 7 states and 175 transitions. [2024-06-03 21:01:32,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 605 transitions, 8147 flow [2024-06-03 21:01:40,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 605 transitions, 8093 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 21:01:40,038 INFO L231 Difference]: Finished difference. Result has 520 places, 586 transitions, 6849 flow [2024-06-03 21:01:40,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6767, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6849, PETRI_PLACES=520, PETRI_TRANSITIONS=586} [2024-06-03 21:01:40,039 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 475 predicate places. [2024-06-03 21:01:40,039 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 586 transitions, 6849 flow [2024-06-03 21:01:40,039 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) [2024-06-03 21:01:40,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:01:40,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:01:40,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-03 21:01:40,039 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:01:40,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:01:40,040 INFO L85 PathProgramCache]: Analyzing trace with hash -37199276, now seen corresponding path program 5 times [2024-06-03 21:01:40,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:01:40,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314135302] [2024-06-03 21:01:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:01:40,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:01:40,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:01:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:01:40,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:01:40,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314135302] [2024-06-03 21:01:40,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314135302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:01:40,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:01:40,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 21:01:40,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488890841] [2024-06-03 21:01:40,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:01:40,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 21:01:40,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:01:40,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 21:01:40,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 21:01:40,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:01:40,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 586 transitions, 6849 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) [2024-06-03 21:01:40,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:01:40,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:01:40,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:01:41,707 INFO L124 PetriNetUnfolderBase]: 2571/4537 cut-off events. [2024-06-03 21:01:41,707 INFO L125 PetriNetUnfolderBase]: For 1002597/1002597 co-relation queries the response was YES. [2024-06-03 21:01:41,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36043 conditions, 4537 events. 2571/4537 cut-off events. For 1002597/1002597 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 31336 event pairs, 423 based on Foata normal form. 2/4534 useless extension candidates. Maximal degree in co-relation 35823. Up to 3840 conditions per place. [2024-06-03 21:01:41,792 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 575 selfloop transitions, 34 changer transitions 0/618 dead transitions. [2024-06-03 21:01:41,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 618 transitions, 8607 flow [2024-06-03 21:01:41,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 21:01:41,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 21:01:41,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-03 21:01:41,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5580808080808081 [2024-06-03 21:01:41,794 INFO L175 Difference]: Start difference. First operand has 520 places, 586 transitions, 6849 flow. Second operand 9 states and 221 transitions. [2024-06-03 21:01:41,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 618 transitions, 8607 flow [2024-06-03 21:01:49,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 618 transitions, 8493 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 21:01:49,732 INFO L231 Difference]: Finished difference. Result has 523 places, 590 transitions, 6952 flow [2024-06-03 21:01:49,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6735, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6952, PETRI_PLACES=523, PETRI_TRANSITIONS=590} [2024-06-03 21:01:49,733 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 478 predicate places. [2024-06-03 21:01:49,733 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 590 transitions, 6952 flow [2024-06-03 21:01:49,733 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) [2024-06-03 21:01:49,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:01:49,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:01:49,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-03 21:01:49,734 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:01:49,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:01:49,734 INFO L85 PathProgramCache]: Analyzing trace with hash -34342316, now seen corresponding path program 6 times [2024-06-03 21:01:49,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:01:49,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785864495] [2024-06-03 21:01:49,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:01:49,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:01:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:01:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:01:50,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:01:50,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785864495] [2024-06-03 21:01:50,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785864495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:01:50,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:01:50,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 21:01:50,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890554212] [2024-06-03 21:01:50,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:01:50,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 21:01:50,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:01:50,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 21:01:50,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 21:01:50,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:01:50,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 590 transitions, 6952 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) [2024-06-03 21:01:50,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:01:50,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:01:50,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:01:51,334 INFO L124 PetriNetUnfolderBase]: 2566/4535 cut-off events. [2024-06-03 21:01:51,334 INFO L125 PetriNetUnfolderBase]: For 986641/986641 co-relation queries the response was YES. [2024-06-03 21:01:51,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35674 conditions, 4535 events. 2566/4535 cut-off events. For 986641/986641 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 31471 event pairs, 429 based on Foata normal form. 2/4532 useless extension candidates. Maximal degree in co-relation 35453. Up to 3862 conditions per place. [2024-06-03 21:01:51,411 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 573 selfloop transitions, 30 changer transitions 0/612 dead transitions. [2024-06-03 21:01:51,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 612 transitions, 8212 flow [2024-06-03 21:01:51,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 21:01:51,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 21:01:51,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 21:01:51,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-03 21:01:51,413 INFO L175 Difference]: Start difference. First operand has 523 places, 590 transitions, 6952 flow. Second operand 8 states and 196 transitions. [2024-06-03 21:01:51,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 612 transitions, 8212 flow [2024-06-03 21:01:59,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 612 transitions, 8025 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-03 21:01:59,650 INFO L231 Difference]: Finished difference. Result has 525 places, 590 transitions, 6830 flow [2024-06-03 21:01:59,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6765, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6830, PETRI_PLACES=525, PETRI_TRANSITIONS=590} [2024-06-03 21:01:59,650 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 480 predicate places. [2024-06-03 21:01:59,651 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 590 transitions, 6830 flow [2024-06-03 21:01:59,651 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) [2024-06-03 21:01:59,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:01:59,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:01:59,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-03 21:01:59,651 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:01:59,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:01:59,652 INFO L85 PathProgramCache]: Analyzing trace with hash -34337356, now seen corresponding path program 7 times [2024-06-03 21:01:59,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:01:59,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86818284] [2024-06-03 21:01:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:01:59,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:01:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:02:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:02:00,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:02:00,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86818284] [2024-06-03 21:02:00,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86818284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:02:00,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:02:00,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 21:02:00,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411719922] [2024-06-03 21:02:00,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:02:00,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 21:02:00,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:02:00,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 21:02:00,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 21:02:00,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:02:00,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 590 transitions, 6830 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) [2024-06-03 21:02:00,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:02:00,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:02:00,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:02:01,349 INFO L124 PetriNetUnfolderBase]: 2571/4544 cut-off events. [2024-06-03 21:02:01,349 INFO L125 PetriNetUnfolderBase]: For 981100/981100 co-relation queries the response was YES. [2024-06-03 21:02:01,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35519 conditions, 4544 events. 2571/4544 cut-off events. For 981100/981100 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 31495 event pairs, 429 based on Foata normal form. 1/4540 useless extension candidates. Maximal degree in co-relation 35297. Up to 3872 conditions per place. [2024-06-03 21:02:01,448 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 574 selfloop transitions, 31 changer transitions 0/614 dead transitions. [2024-06-03 21:02:01,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 614 transitions, 8150 flow [2024-06-03 21:02:01,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 21:02:01,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 21:02:01,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 21:02:01,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-03 21:02:01,450 INFO L175 Difference]: Start difference. First operand has 525 places, 590 transitions, 6830 flow. Second operand 8 states and 196 transitions. [2024-06-03 21:02:01,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 614 transitions, 8150 flow [2024-06-03 21:02:09,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 614 transitions, 8085 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 21:02:09,540 INFO L231 Difference]: Finished difference. Result has 526 places, 593 transitions, 6897 flow [2024-06-03 21:02:09,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6765, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6897, PETRI_PLACES=526, PETRI_TRANSITIONS=593} [2024-06-03 21:02:09,540 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 481 predicate places. [2024-06-03 21:02:09,540 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 593 transitions, 6897 flow [2024-06-03 21:02:09,541 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) [2024-06-03 21:02:09,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:02:09,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:02:09,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-03 21:02:09,541 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:02:09,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:02:09,541 INFO L85 PathProgramCache]: Analyzing trace with hash 246587988, now seen corresponding path program 7 times [2024-06-03 21:02:09,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:02:09,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868272645] [2024-06-03 21:02:09,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:02:09,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:02:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:02:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:02:09,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:02:09,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868272645] [2024-06-03 21:02:09,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868272645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:02:09,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:02:09,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 21:02:09,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598963207] [2024-06-03 21:02:09,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:02:09,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 21:02:09,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:02:09,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 21:02:09,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 21:02:09,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:02:09,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 593 transitions, 6897 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) [2024-06-03 21:02:09,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:02:09,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:02:09,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:02:11,053 INFO L124 PetriNetUnfolderBase]: 2579/4558 cut-off events. [2024-06-03 21:02:11,053 INFO L125 PetriNetUnfolderBase]: For 1007892/1007892 co-relation queries the response was YES. [2024-06-03 21:02:11,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35752 conditions, 4558 events. 2579/4558 cut-off events. For 1007892/1007892 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 31626 event pairs, 434 based on Foata normal form. 2/4553 useless extension candidates. Maximal degree in co-relation 35529. Up to 3806 conditions per place. [2024-06-03 21:02:11,130 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 515 selfloop transitions, 90 changer transitions 0/614 dead transitions. [2024-06-03 21:02:11,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 614 transitions, 8225 flow [2024-06-03 21:02:11,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 21:02:11,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 21:02:11,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-03 21:02:11,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596590909090909 [2024-06-03 21:02:11,131 INFO L175 Difference]: Start difference. First operand has 526 places, 593 transitions, 6897 flow. Second operand 8 states and 197 transitions. [2024-06-03 21:02:11,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 614 transitions, 8225 flow [2024-06-03 21:02:19,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 614 transitions, 8127 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-03 21:02:19,438 INFO L231 Difference]: Finished difference. Result has 528 places, 595 transitions, 7060 flow [2024-06-03 21:02:19,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6799, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7060, PETRI_PLACES=528, PETRI_TRANSITIONS=595} [2024-06-03 21:02:19,439 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 483 predicate places. [2024-06-03 21:02:19,439 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 595 transitions, 7060 flow [2024-06-03 21:02:19,439 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) [2024-06-03 21:02:19,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:02:19,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:02:19,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-03 21:02:19,440 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:02:19,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:02:19,440 INFO L85 PathProgramCache]: Analyzing trace with hash 246592948, now seen corresponding path program 8 times [2024-06-03 21:02:19,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:02:19,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008395321] [2024-06-03 21:02:19,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:02:19,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:02:19,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:02:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:02:19,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:02:19,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008395321] [2024-06-03 21:02:19,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008395321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:02:19,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:02:19,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 21:02:19,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440065011] [2024-06-03 21:02:19,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:02:19,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 21:02:19,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:02:19,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 21:02:19,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 21:02:19,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:02:19,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 595 transitions, 7060 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) [2024-06-03 21:02:19,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:02:19,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:02:19,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:02:20,979 INFO L124 PetriNetUnfolderBase]: 2592/4578 cut-off events. [2024-06-03 21:02:20,979 INFO L125 PetriNetUnfolderBase]: For 1020245/1020245 co-relation queries the response was YES. [2024-06-03 21:02:21,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36340 conditions, 4578 events. 2592/4578 cut-off events. For 1020245/1020245 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 31786 event pairs, 438 based on Foata normal form. 1/4570 useless extension candidates. Maximal degree in co-relation 36116. Up to 3688 conditions per place. [2024-06-03 21:02:21,073 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 464 selfloop transitions, 150 changer transitions 0/623 dead transitions. [2024-06-03 21:02:21,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 623 transitions, 9828 flow [2024-06-03 21:02:21,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 21:02:21,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 21:02:21,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-03 21:02:21,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-03 21:02:21,074 INFO L175 Difference]: Start difference. First operand has 528 places, 595 transitions, 7060 flow. Second operand 8 states and 206 transitions. [2024-06-03 21:02:21,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 623 transitions, 9828 flow [2024-06-03 21:02:29,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 623 transitions, 9583 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-03 21:02:29,755 INFO L231 Difference]: Finished difference. Result has 530 places, 601 transitions, 7249 flow [2024-06-03 21:02:29,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6815, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7249, PETRI_PLACES=530, PETRI_TRANSITIONS=601} [2024-06-03 21:02:29,756 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 485 predicate places. [2024-06-03 21:02:29,756 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 601 transitions, 7249 flow [2024-06-03 21:02:29,756 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) [2024-06-03 21:02:29,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:02:29,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:02:29,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-03 21:02:29,757 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:02:29,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:02:29,757 INFO L85 PathProgramCache]: Analyzing trace with hash 253259188, now seen corresponding path program 9 times [2024-06-03 21:02:29,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:02:29,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758039087] [2024-06-03 21:02:29,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:02:29,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:02:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:02:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:02:30,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:02:30,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758039087] [2024-06-03 21:02:30,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758039087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:02:30,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:02:30,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 21:02:30,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620758757] [2024-06-03 21:02:30,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:02:30,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 21:02:30,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:02:30,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 21:02:30,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 21:02:30,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:02:30,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 601 transitions, 7249 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) [2024-06-03 21:02:30,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:02:30,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:02:30,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:02:31,255 INFO L124 PetriNetUnfolderBase]: 2589/4574 cut-off events. [2024-06-03 21:02:31,255 INFO L125 PetriNetUnfolderBase]: For 1016677/1016677 co-relation queries the response was YES. [2024-06-03 21:02:31,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36200 conditions, 4574 events. 2589/4574 cut-off events. For 1016677/1016677 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 31752 event pairs, 438 based on Foata normal form. 1/4566 useless extension candidates. Maximal degree in co-relation 35975. Up to 3685 conditions per place. [2024-06-03 21:02:31,335 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 461 selfloop transitions, 152 changer transitions 0/622 dead transitions. [2024-06-03 21:02:31,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 622 transitions, 9551 flow [2024-06-03 21:02:31,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 21:02:31,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 21:02:31,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-03 21:02:31,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-03 21:02:31,337 INFO L175 Difference]: Start difference. First operand has 530 places, 601 transitions, 7249 flow. Second operand 8 states and 204 transitions. [2024-06-03 21:02:31,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 622 transitions, 9551 flow [2024-06-03 21:02:39,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 622 transitions, 9089 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-03 21:02:39,291 INFO L231 Difference]: Finished difference. Result has 532 places, 601 transitions, 7097 flow [2024-06-03 21:02:39,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6787, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7097, PETRI_PLACES=532, PETRI_TRANSITIONS=601} [2024-06-03 21:02:39,292 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 487 predicate places. [2024-06-03 21:02:39,292 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 601 transitions, 7097 flow [2024-06-03 21:02:39,292 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) [2024-06-03 21:02:39,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:02:39,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:02:39,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-03 21:02:39,292 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:02:39,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:02:39,293 INFO L85 PathProgramCache]: Analyzing trace with hash 253268116, now seen corresponding path program 5 times [2024-06-03 21:02:39,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:02:39,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983868050] [2024-06-03 21:02:39,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:02:39,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:02:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:02:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:02:39,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:02:39,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983868050] [2024-06-03 21:02:39,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983868050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:02:39,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:02:39,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 21:02:39,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882434885] [2024-06-03 21:02:39,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:02:39,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 21:02:39,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:02:39,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 21:02:39,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 21:02:39,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:02:39,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 601 transitions, 7097 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) [2024-06-03 21:02:39,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:02:39,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:02:39,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:02:40,869 INFO L124 PetriNetUnfolderBase]: 2584/4567 cut-off events. [2024-06-03 21:02:40,869 INFO L125 PetriNetUnfolderBase]: For 1011612/1011612 co-relation queries the response was YES. [2024-06-03 21:02:40,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35766 conditions, 4567 events. 2584/4567 cut-off events. For 1011612/1011612 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 31665 event pairs, 437 based on Foata normal form. 2/4560 useless extension candidates. Maximal degree in co-relation 35541. Up to 3837 conditions per place. [2024-06-03 21:02:40,944 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 521 selfloop transitions, 91 changer transitions 0/621 dead transitions. [2024-06-03 21:02:40,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 621 transitions, 8392 flow [2024-06-03 21:02:40,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 21:02:40,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 21:02:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-03 21:02:40,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596590909090909 [2024-06-03 21:02:40,946 INFO L175 Difference]: Start difference. First operand has 532 places, 601 transitions, 7097 flow. Second operand 8 states and 197 transitions. [2024-06-03 21:02:40,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 621 transitions, 8392 flow [2024-06-03 21:02:48,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 621 transitions, 8040 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-03 21:02:48,959 INFO L231 Difference]: Finished difference. Result has 533 places, 602 transitions, 6959 flow [2024-06-03 21:02:48,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6759, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6959, PETRI_PLACES=533, PETRI_TRANSITIONS=602} [2024-06-03 21:02:48,960 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 488 predicate places. [2024-06-03 21:02:48,960 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 602 transitions, 6959 flow [2024-06-03 21:02:48,960 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) [2024-06-03 21:02:48,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:02:48,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:02:48,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-03 21:02:48,960 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:02:48,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:02:48,961 INFO L85 PathProgramCache]: Analyzing trace with hash -274257324, now seen corresponding path program 8 times [2024-06-03 21:02:48,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:02:48,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708550988] [2024-06-03 21:02:48,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:02:48,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:02:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:02:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:02:49,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:02:49,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708550988] [2024-06-03 21:02:49,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708550988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:02:49,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:02:49,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 21:02:49,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467046234] [2024-06-03 21:02:49,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:02:49,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 21:02:49,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:02:49,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 21:02:49,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 21:02:49,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:02:49,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 602 transitions, 6959 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) [2024-06-03 21:02:49,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:02:49,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:02:49,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:02:50,587 INFO L124 PetriNetUnfolderBase]: 2605/4601 cut-off events. [2024-06-03 21:02:50,587 INFO L125 PetriNetUnfolderBase]: For 1053983/1053983 co-relation queries the response was YES. [2024-06-03 21:02:50,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36409 conditions, 4601 events. 2605/4601 cut-off events. For 1053983/1053983 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 31983 event pairs, 426 based on Foata normal form. 2/4598 useless extension candidates. Maximal degree in co-relation 36184. Up to 3876 conditions per place. [2024-06-03 21:02:50,665 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 579 selfloop transitions, 47 changer transitions 0/635 dead transitions. [2024-06-03 21:02:50,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 635 transitions, 8779 flow [2024-06-03 21:02:50,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 21:02:50,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 21:02:50,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-03 21:02:50,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5477272727272727 [2024-06-03 21:02:50,666 INFO L175 Difference]: Start difference. First operand has 533 places, 602 transitions, 6959 flow. Second operand 10 states and 241 transitions. [2024-06-03 21:02:50,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 635 transitions, 8779 flow [2024-06-03 21:02:59,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 635 transitions, 8588 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 21:02:59,636 INFO L231 Difference]: Finished difference. Result has 537 places, 606 transitions, 7023 flow [2024-06-03 21:02:59,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6768, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7023, PETRI_PLACES=537, PETRI_TRANSITIONS=606} [2024-06-03 21:02:59,637 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 492 predicate places. [2024-06-03 21:02:59,637 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 606 transitions, 7023 flow [2024-06-03 21:02:59,637 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) [2024-06-03 21:02:59,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:02:59,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:02:59,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-03 21:02:59,637 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:02:59,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:02:59,638 INFO L85 PathProgramCache]: Analyzing trace with hash -31382888, now seen corresponding path program 9 times [2024-06-03 21:02:59,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:02:59,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442807328] [2024-06-03 21:02:59,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:02:59,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:02:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:03:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:03:00,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:03:00,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442807328] [2024-06-03 21:03:00,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442807328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:03:00,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:03:00,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 21:03:00,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301256155] [2024-06-03 21:03:00,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:03:00,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 21:03:00,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:03:00,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 21:03:00,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 21:03:00,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:03:00,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 606 transitions, 7023 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) [2024-06-03 21:03:00,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:03:00,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:03:00,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:03:01,223 INFO L124 PetriNetUnfolderBase]: 2613/4618 cut-off events. [2024-06-03 21:03:01,223 INFO L125 PetriNetUnfolderBase]: For 1068463/1068463 co-relation queries the response was YES. [2024-06-03 21:03:01,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36688 conditions, 4618 events. 2613/4618 cut-off events. For 1068463/1068463 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 32108 event pairs, 433 based on Foata normal form. 2/4615 useless extension candidates. Maximal degree in co-relation 36462. Up to 3919 conditions per place. [2024-06-03 21:03:01,308 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 580 selfloop transitions, 43 changer transitions 0/632 dead transitions. [2024-06-03 21:03:01,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 632 transitions, 8407 flow [2024-06-03 21:03:01,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 21:03:01,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 21:03:01,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-03 21:03:01,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-06-03 21:03:01,309 INFO L175 Difference]: Start difference. First operand has 537 places, 606 transitions, 7023 flow. Second operand 10 states and 236 transitions. [2024-06-03 21:03:01,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 632 transitions, 8407 flow [2024-06-03 21:03:10,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 632 transitions, 8207 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-03 21:03:10,220 INFO L231 Difference]: Finished difference. Result has 541 places, 608 transitions, 6998 flow [2024-06-03 21:03:10,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6861, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6998, PETRI_PLACES=541, PETRI_TRANSITIONS=608} [2024-06-03 21:03:10,221 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 496 predicate places. [2024-06-03 21:03:10,221 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 608 transitions, 6998 flow [2024-06-03 21:03:10,221 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) [2024-06-03 21:03:10,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:03:10,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:03:10,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-03 21:03:10,221 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:03:10,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:03:10,222 INFO L85 PathProgramCache]: Analyzing trace with hash -31377928, now seen corresponding path program 10 times [2024-06-03 21:03:10,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:03:10,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889494767] [2024-06-03 21:03:10,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:03:10,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:03:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:03:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:03:10,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:03:10,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889494767] [2024-06-03 21:03:10,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889494767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:03:10,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:03:10,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 21:03:10,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232277999] [2024-06-03 21:03:10,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:03:10,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 21:03:10,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:03:10,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 21:03:10,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 21:03:10,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:03:10,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 608 transitions, 6998 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) [2024-06-03 21:03:10,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:03:10,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:03:10,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:03:11,799 INFO L124 PetriNetUnfolderBase]: 2618/4627 cut-off events. [2024-06-03 21:03:11,799 INFO L125 PetriNetUnfolderBase]: For 1061901/1061901 co-relation queries the response was YES. [2024-06-03 21:03:11,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36622 conditions, 4627 events. 2618/4627 cut-off events. For 1061901/1061901 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 32192 event pairs, 433 based on Foata normal form. 1/4623 useless extension candidates. Maximal degree in co-relation 36394. Up to 3914 conditions per place. [2024-06-03 21:03:11,883 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 574 selfloop transitions, 52 changer transitions 0/635 dead transitions. [2024-06-03 21:03:11,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 635 transitions, 8730 flow [2024-06-03 21:03:11,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 21:03:11,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 21:03:11,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-03 21:03:11,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431818181818182 [2024-06-03 21:03:11,884 INFO L175 Difference]: Start difference. First operand has 541 places, 608 transitions, 6998 flow. Second operand 10 states and 239 transitions. [2024-06-03 21:03:11,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 635 transitions, 8730 flow [2024-06-03 21:03:20,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 635 transitions, 8581 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-03 21:03:20,884 INFO L231 Difference]: Finished difference. Result has 544 places, 611 transitions, 7044 flow [2024-06-03 21:03:20,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6849, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7044, PETRI_PLACES=544, PETRI_TRANSITIONS=611} [2024-06-03 21:03:20,884 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 499 predicate places. [2024-06-03 21:03:20,885 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 611 transitions, 7044 flow [2024-06-03 21:03:20,885 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) [2024-06-03 21:03:20,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:03:20,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:03:20,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-03 21:03:20,885 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:03:20,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:03:20,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1215669814, now seen corresponding path program 10 times [2024-06-03 21:03:20,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:03:20,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908189967] [2024-06-03 21:03:20,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:03:20,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:03:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:03:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:03:21,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:03:21,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908189967] [2024-06-03 21:03:21,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908189967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:03:21,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:03:21,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 21:03:21,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012735827] [2024-06-03 21:03:21,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:03:21,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 21:03:21,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:03:21,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 21:03:21,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 21:03:21,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:03:21,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 611 transitions, 7044 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) [2024-06-03 21:03:21,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:03:21,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:03:21,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:03:22,517 INFO L124 PetriNetUnfolderBase]: 2639/4662 cut-off events. [2024-06-03 21:03:22,517 INFO L125 PetriNetUnfolderBase]: For 1121993/1121993 co-relation queries the response was YES. [2024-06-03 21:03:22,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37435 conditions, 4662 events. 2639/4662 cut-off events. For 1121993/1121993 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 32467 event pairs, 345 based on Foata normal form. 2/4659 useless extension candidates. Maximal degree in co-relation 37205. Up to 3780 conditions per place. [2024-06-03 21:03:22,617 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 573 selfloop transitions, 66 changer transitions 0/648 dead transitions. [2024-06-03 21:03:22,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 648 transitions, 9322 flow [2024-06-03 21:03:22,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 21:03:22,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 21:03:22,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-03 21:03:22,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5656565656565656 [2024-06-03 21:03:22,618 INFO L175 Difference]: Start difference. First operand has 544 places, 611 transitions, 7044 flow. Second operand 9 states and 224 transitions. [2024-06-03 21:03:22,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 648 transitions, 9322 flow [2024-06-03 21:03:32,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 648 transitions, 9167 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-03 21:03:32,227 INFO L231 Difference]: Finished difference. Result has 545 places, 618 transitions, 7288 flow [2024-06-03 21:03:32,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6889, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7288, PETRI_PLACES=545, PETRI_TRANSITIONS=618} [2024-06-03 21:03:32,227 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 500 predicate places. [2024-06-03 21:03:32,227 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 618 transitions, 7288 flow [2024-06-03 21:03:32,228 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) [2024-06-03 21:03:32,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:03:32,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:03:32,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-03 21:03:32,228 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:03:32,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:03:32,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1216115284, now seen corresponding path program 11 times [2024-06-03 21:03:32,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:03:32,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114226000] [2024-06-03 21:03:32,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:03:32,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:03:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:03:32,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:03:32,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:03:32,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114226000] [2024-06-03 21:03:32,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114226000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:03:32,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:03:32,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 21:03:32,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951334594] [2024-06-03 21:03:32,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:03:32,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 21:03:32,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:03:32,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 21:03:32,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 21:03:32,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:03:32,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 618 transitions, 7288 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) [2024-06-03 21:03:32,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:03:32,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:03:32,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:03:33,816 INFO L124 PetriNetUnfolderBase]: 2647/4678 cut-off events. [2024-06-03 21:03:33,816 INFO L125 PetriNetUnfolderBase]: For 1136776/1136776 co-relation queries the response was YES. [2024-06-03 21:03:33,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38005 conditions, 4678 events. 2647/4678 cut-off events. For 1136776/1136776 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 32640 event pairs, 345 based on Foata normal form. 2/4675 useless extension candidates. Maximal degree in co-relation 37773. Up to 3788 conditions per place. [2024-06-03 21:03:33,901 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 567 selfloop transitions, 71 changer transitions 0/647 dead transitions. [2024-06-03 21:03:33,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 647 transitions, 9103 flow [2024-06-03 21:03:33,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 21:03:33,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 21:03:33,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-03 21:03:33,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-03 21:03:33,902 INFO L175 Difference]: Start difference. First operand has 545 places, 618 transitions, 7288 flow. Second operand 9 states and 220 transitions. [2024-06-03 21:03:33,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 647 transitions, 9103 flow [2024-06-03 21:03:43,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 647 transitions, 8847 flow, removed 104 selfloop flow, removed 4 redundant places. [2024-06-03 21:03:43,610 INFO L231 Difference]: Finished difference. Result has 550 places, 621 transitions, 7302 flow [2024-06-03 21:03:43,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7090, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7302, PETRI_PLACES=550, PETRI_TRANSITIONS=621} [2024-06-03 21:03:43,611 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 505 predicate places. [2024-06-03 21:03:43,611 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 621 transitions, 7302 flow [2024-06-03 21:03:43,611 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) [2024-06-03 21:03:43,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:03:43,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:03:43,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-03 21:03:43,613 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:03:43,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:03:43,613 INFO L85 PathProgramCache]: Analyzing trace with hash -343788972, now seen corresponding path program 12 times [2024-06-03 21:03:43,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:03:43,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085144795] [2024-06-03 21:03:43,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:03:43,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:03:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:03:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:03:43,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:03:43,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085144795] [2024-06-03 21:03:43,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085144795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:03:43,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:03:43,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 21:03:43,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472639191] [2024-06-03 21:03:43,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:03:43,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 21:03:43,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:03:43,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 21:03:43,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 21:03:44,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:03:44,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 621 transitions, 7302 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) [2024-06-03 21:03:44,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:03:44,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:03:44,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:03:45,170 INFO L124 PetriNetUnfolderBase]: 2642/4671 cut-off events. [2024-06-03 21:03:45,170 INFO L125 PetriNetUnfolderBase]: For 1110762/1110762 co-relation queries the response was YES. [2024-06-03 21:03:45,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37296 conditions, 4671 events. 2642/4671 cut-off events. For 1110762/1110762 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 32590 event pairs, 437 based on Foata normal form. 2/4668 useless extension candidates. Maximal degree in co-relation 37062. Up to 3962 conditions per place. [2024-06-03 21:03:45,265 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 589 selfloop transitions, 42 changer transitions 0/640 dead transitions. [2024-06-03 21:03:45,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 640 transitions, 8610 flow [2024-06-03 21:03:45,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 21:03:45,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 21:03:45,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-03 21:03:45,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5482954545454546 [2024-06-03 21:03:45,266 INFO L175 Difference]: Start difference. First operand has 550 places, 621 transitions, 7302 flow. Second operand 8 states and 193 transitions. [2024-06-03 21:03:45,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 640 transitions, 8610 flow [2024-06-03 21:03:54,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 640 transitions, 8415 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-03 21:03:54,186 INFO L231 Difference]: Finished difference. Result has 553 places, 621 transitions, 7196 flow [2024-06-03 21:03:54,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7107, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7196, PETRI_PLACES=553, PETRI_TRANSITIONS=621} [2024-06-03 21:03:54,186 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 508 predicate places. [2024-06-03 21:03:54,186 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 621 transitions, 7196 flow [2024-06-03 21:03:54,187 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) [2024-06-03 21:03:54,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:03:54,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:03:54,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-03 21:03:54,187 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:03:54,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:03:54,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1274207734, now seen corresponding path program 13 times [2024-06-03 21:03:54,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:03:54,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980108356] [2024-06-03 21:03:54,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:03:54,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:03:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:03:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:03:54,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:03:54,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980108356] [2024-06-03 21:03:54,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980108356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:03:54,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:03:54,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 21:03:54,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837641108] [2024-06-03 21:03:54,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:03:54,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 21:03:54,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:03:54,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 21:03:54,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 21:03:54,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:03:54,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 621 transitions, 7196 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) [2024-06-03 21:03:54,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:03:54,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:03:54,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:03:55,745 INFO L124 PetriNetUnfolderBase]: 2637/4662 cut-off events. [2024-06-03 21:03:55,745 INFO L125 PetriNetUnfolderBase]: For 1090501/1090501 co-relation queries the response was YES. [2024-06-03 21:03:55,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36667 conditions, 4662 events. 2637/4662 cut-off events. For 1090501/1090501 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 32521 event pairs, 432 based on Foata normal form. 2/4657 useless extension candidates. Maximal degree in co-relation 36432. Up to 3923 conditions per place. [2024-06-03 21:03:55,836 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 581 selfloop transitions, 51 changer transitions 0/641 dead transitions. [2024-06-03 21:03:55,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 641 transitions, 8508 flow [2024-06-03 21:03:55,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 21:03:55,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 21:03:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-03 21:03:55,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511363636363636 [2024-06-03 21:03:55,838 INFO L175 Difference]: Start difference. First operand has 553 places, 621 transitions, 7196 flow. Second operand 8 states and 194 transitions. [2024-06-03 21:03:55,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 641 transitions, 8508 flow [2024-06-03 21:04:04,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 641 transitions, 8380 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-03 21:04:04,918 INFO L231 Difference]: Finished difference. Result has 554 places, 621 transitions, 7175 flow [2024-06-03 21:04:04,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7068, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7175, PETRI_PLACES=554, PETRI_TRANSITIONS=621} [2024-06-03 21:04:04,919 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 509 predicate places. [2024-06-03 21:04:04,919 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 621 transitions, 7175 flow [2024-06-03 21:04:04,919 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) [2024-06-03 21:04:04,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:04:04,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:04:04,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-03 21:04:04,919 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:04:04,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:04:04,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1586318640, now seen corresponding path program 11 times [2024-06-03 21:04:04,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:04:04,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079766270] [2024-06-03 21:04:04,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:04:04,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:04:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:04:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:04:05,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:04:05,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079766270] [2024-06-03 21:04:05,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079766270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:04:05,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:04:05,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 21:04:05,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942434270] [2024-06-03 21:04:05,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:04:05,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 21:04:05,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:04:05,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 21:04:05,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 21:04:05,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:04:05,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 621 transitions, 7175 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) [2024-06-03 21:04:05,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:04:05,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:04:05,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:04:06,442 INFO L124 PetriNetUnfolderBase]: 2642/4673 cut-off events. [2024-06-03 21:04:06,443 INFO L125 PetriNetUnfolderBase]: For 1085833/1085833 co-relation queries the response was YES. [2024-06-03 21:04:06,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36763 conditions, 4673 events. 2642/4673 cut-off events. For 1085833/1085833 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 32646 event pairs, 436 based on Foata normal form. 1/4669 useless extension candidates. Maximal degree in co-relation 36527. Up to 3949 conditions per place. [2024-06-03 21:04:06,531 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 580 selfloop transitions, 54 changer transitions 0/643 dead transitions. [2024-06-03 21:04:06,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 643 transitions, 8911 flow [2024-06-03 21:04:06,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 21:04:06,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 21:04:06,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 21:04:06,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-03 21:04:06,532 INFO L175 Difference]: Start difference. First operand has 554 places, 621 transitions, 7175 flow. Second operand 8 states and 196 transitions. [2024-06-03 21:04:06,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 643 transitions, 8911 flow [2024-06-03 21:04:15,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 643 transitions, 8787 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 21:04:15,843 INFO L231 Difference]: Finished difference. Result has 555 places, 624 transitions, 7227 flow [2024-06-03 21:04:15,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7051, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7227, PETRI_PLACES=555, PETRI_TRANSITIONS=624} [2024-06-03 21:04:15,844 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 510 predicate places. [2024-06-03 21:04:15,844 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 624 transitions, 7227 flow [2024-06-03 21:04:15,844 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) [2024-06-03 21:04:15,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:04:15,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:04:15,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-03 21:04:15,845 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:04:15,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:04:15,845 INFO L85 PathProgramCache]: Analyzing trace with hash -328546892, now seen corresponding path program 12 times [2024-06-03 21:04:15,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:04:15,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597382517] [2024-06-03 21:04:15,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:04:15,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:04:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:04:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:04:16,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:04:16,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597382517] [2024-06-03 21:04:16,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597382517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:04:16,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:04:16,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 21:04:16,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661455867] [2024-06-03 21:04:16,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:04:16,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 21:04:16,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:04:16,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 21:04:16,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 21:04:16,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:04:16,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 624 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) [2024-06-03 21:04:16,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:04:16,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:04:16,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:04:17,352 INFO L124 PetriNetUnfolderBase]: 2639/4674 cut-off events. [2024-06-03 21:04:17,352 INFO L125 PetriNetUnfolderBase]: For 1080701/1080701 co-relation queries the response was YES. [2024-06-03 21:04:17,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36569 conditions, 4674 events. 2639/4674 cut-off events. For 1080701/1080701 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 32630 event pairs, 429 based on Foata normal form. 1/4673 useless extension candidates. Maximal degree in co-relation 36332. Up to 4030 conditions per place. [2024-06-03 21:04:17,440 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 614 selfloop transitions, 19 changer transitions 0/642 dead transitions. [2024-06-03 21:04:17,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 642 transitions, 8537 flow [2024-06-03 21:04:17,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 21:04:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 21:04:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-03 21:04:17,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369318181818182 [2024-06-03 21:04:17,442 INFO L175 Difference]: Start difference. First operand has 555 places, 624 transitions, 7227 flow. Second operand 8 states and 189 transitions. [2024-06-03 21:04:17,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 642 transitions, 8537 flow [2024-06-03 21:04:26,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 642 transitions, 8361 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-03 21:04:26,224 INFO L231 Difference]: Finished difference. Result has 557 places, 624 transitions, 7095 flow [2024-06-03 21:04:26,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7051, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7095, PETRI_PLACES=557, PETRI_TRANSITIONS=624} [2024-06-03 21:04:26,225 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 512 predicate places. [2024-06-03 21:04:26,225 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 624 transitions, 7095 flow [2024-06-03 21:04:26,225 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) [2024-06-03 21:04:26,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:04:26,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:04:26,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-03 21:04:26,225 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:04:26,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:04:26,226 INFO L85 PathProgramCache]: Analyzing trace with hash -952706476, now seen corresponding path program 14 times [2024-06-03 21:04:26,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:04:26,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791271085] [2024-06-03 21:04:26,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:04:26,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:04:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:04:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:04:26,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:04:26,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791271085] [2024-06-03 21:04:26,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791271085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:04:26,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:04:26,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 21:04:26,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673637261] [2024-06-03 21:04:26,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:04:26,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 21:04:26,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:04:26,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 21:04:26,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 21:04:26,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:04:26,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 624 transitions, 7095 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) [2024-06-03 21:04:26,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:04:26,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:04:26,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:04:27,746 INFO L124 PetriNetUnfolderBase]: 2647/4683 cut-off events. [2024-06-03 21:04:27,746 INFO L125 PetriNetUnfolderBase]: For 1108402/1108402 co-relation queries the response was YES. [2024-06-03 21:04:27,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36639 conditions, 4683 events. 2647/4683 cut-off events. For 1108402/1108402 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 32754 event pairs, 441 based on Foata normal form. 2/4678 useless extension candidates. Maximal degree in co-relation 36401. Up to 3907 conditions per place. [2024-06-03 21:04:27,836 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 542 selfloop transitions, 91 changer transitions 0/642 dead transitions. [2024-06-03 21:04:27,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 642 transitions, 8475 flow [2024-06-03 21:04:27,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 21:04:27,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 21:04:27,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-03 21:04:27,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511363636363636 [2024-06-03 21:04:27,838 INFO L175 Difference]: Start difference. First operand has 557 places, 624 transitions, 7095 flow. Second operand 8 states and 194 transitions. [2024-06-03 21:04:27,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 642 transitions, 8475 flow [2024-06-03 21:04:37,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 642 transitions, 8413 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 21:04:37,420 INFO L231 Difference]: Finished difference. Result has 558 places, 626 transitions, 7300 flow [2024-06-03 21:04:37,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7033, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7300, PETRI_PLACES=558, PETRI_TRANSITIONS=626} [2024-06-03 21:04:37,421 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 513 predicate places. [2024-06-03 21:04:37,421 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 626 transitions, 7300 flow [2024-06-03 21:04:37,421 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) [2024-06-03 21:04:37,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:04:37,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:04:37,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-03 21:04:37,422 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:04:37,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:04:37,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1932321386, now seen corresponding path program 15 times [2024-06-03 21:04:37,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:04:37,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057662357] [2024-06-03 21:04:37,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:04:37,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:04:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:04:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:04:37,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:04:37,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057662357] [2024-06-03 21:04:37,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057662357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:04:37,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:04:37,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 21:04:37,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565102427] [2024-06-03 21:04:37,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:04:37,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 21:04:37,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:04:37,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 21:04:37,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 21:04:37,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:04:37,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 626 transitions, 7300 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) [2024-06-03 21:04:37,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:04:37,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:04:37,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:04:38,987 INFO L124 PetriNetUnfolderBase]: 2668/4714 cut-off events. [2024-06-03 21:04:38,987 INFO L125 PetriNetUnfolderBase]: For 1157282/1157282 co-relation queries the response was YES. [2024-06-03 21:04:39,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37755 conditions, 4714 events. 2668/4714 cut-off events. For 1157282/1157282 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 32950 event pairs, 440 based on Foata normal form. 2/4709 useless extension candidates. Maximal degree in co-relation 37516. Up to 3903 conditions per place. [2024-06-03 21:04:39,111 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 541 selfloop transitions, 99 changer transitions 0/649 dead transitions. [2024-06-03 21:04:39,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 649 transitions, 9162 flow [2024-06-03 21:04:39,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 21:04:39,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 21:04:39,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 21:04:39,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-03 21:04:39,112 INFO L175 Difference]: Start difference. First operand has 558 places, 626 transitions, 7300 flow. Second operand 8 states and 196 transitions. [2024-06-03 21:04:39,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 649 transitions, 9162 flow [2024-06-03 21:04:48,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 649 transitions, 8911 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-03 21:04:48,147 INFO L231 Difference]: Finished difference. Result has 561 places, 631 transitions, 7446 flow [2024-06-03 21:04:48,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7049, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7446, PETRI_PLACES=561, PETRI_TRANSITIONS=631} [2024-06-03 21:04:48,148 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 516 predicate places. [2024-06-03 21:04:48,148 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 631 transitions, 7446 flow [2024-06-03 21:04:48,148 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) [2024-06-03 21:04:48,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:04:48,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:04:48,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-03 21:04:48,149 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:04:48,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:04:48,149 INFO L85 PathProgramCache]: Analyzing trace with hash -687114232, now seen corresponding path program 16 times [2024-06-03 21:04:48,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:04:48,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438593077] [2024-06-03 21:04:48,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:04:48,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:04:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:04:48,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:04:48,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:04:48,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438593077] [2024-06-03 21:04:48,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438593077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:04:48,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:04:48,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 21:04:48,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205830155] [2024-06-03 21:04:48,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:04:48,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 21:04:48,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:04:48,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 21:04:48,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 21:04:48,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:04:48,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 631 transitions, 7446 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) [2024-06-03 21:04:48,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:04:48,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:04:48,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:04:49,673 INFO L124 PetriNetUnfolderBase]: 2663/4707 cut-off events. [2024-06-03 21:04:49,674 INFO L125 PetriNetUnfolderBase]: For 1137089/1137089 co-relation queries the response was YES. [2024-06-03 21:04:49,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37406 conditions, 4707 events. 2663/4707 cut-off events. For 1137089/1137089 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 32877 event pairs, 441 based on Foata normal form. 2/4702 useless extension candidates. Maximal degree in co-relation 37165. Up to 3931 conditions per place. [2024-06-03 21:04:49,763 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 549 selfloop transitions, 90 changer transitions 0/648 dead transitions. [2024-06-03 21:04:49,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 648 transitions, 8801 flow [2024-06-03 21:04:49,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 21:04:49,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 21:04:49,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-03 21:04:49,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511363636363636 [2024-06-03 21:04:49,765 INFO L175 Difference]: Start difference. First operand has 561 places, 631 transitions, 7446 flow. Second operand 8 states and 194 transitions. [2024-06-03 21:04:49,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 648 transitions, 8801 flow [2024-06-03 21:04:59,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 648 transitions, 8519 flow, removed 89 selfloop flow, removed 4 redundant places. [2024-06-03 21:04:59,975 INFO L231 Difference]: Finished difference. Result has 565 places, 632 transitions, 7390 flow [2024-06-03 21:04:59,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7192, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7390, PETRI_PLACES=565, PETRI_TRANSITIONS=632} [2024-06-03 21:04:59,976 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 520 predicate places. [2024-06-03 21:04:59,976 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 632 transitions, 7390 flow [2024-06-03 21:04:59,977 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) [2024-06-03 21:04:59,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:04:59,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:04:59,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-03 21:04:59,977 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:04:59,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:04:59,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1872370674, now seen corresponding path program 13 times [2024-06-03 21:04:59,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:04:59,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651492856] [2024-06-03 21:04:59,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:04:59,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:04:59,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:05:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:05:00,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:05:00,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651492856] [2024-06-03 21:05:00,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651492856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:05:00,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:05:00,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 21:05:00,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739374705] [2024-06-03 21:05:00,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:05:00,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 21:05:00,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:05:00,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 21:05:00,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 21:05:00,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:05:00,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 632 transitions, 7390 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) [2024-06-03 21:05:00,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:05:00,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:05:00,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:05:01,480 INFO L124 PetriNetUnfolderBase]: 2684/4740 cut-off events. [2024-06-03 21:05:01,481 INFO L125 PetriNetUnfolderBase]: For 1163800/1163800 co-relation queries the response was YES. [2024-06-03 21:05:01,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38006 conditions, 4740 events. 2684/4740 cut-off events. For 1163800/1163800 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 33193 event pairs, 445 based on Foata normal form. 1/4732 useless extension candidates. Maximal degree in co-relation 37763. Up to 3819 conditions per place. [2024-06-03 21:05:01,577 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 485 selfloop transitions, 165 changer transitions 0/659 dead transitions. [2024-06-03 21:05:01,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 659 transitions, 10076 flow [2024-06-03 21:05:01,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 21:05:01,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 21:05:01,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-03 21:05:01,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738636363636364 [2024-06-03 21:05:01,578 INFO L175 Difference]: Start difference. First operand has 565 places, 632 transitions, 7390 flow. Second operand 8 states and 202 transitions. [2024-06-03 21:05:01,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 659 transitions, 10076 flow [2024-06-03 21:05:10,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 659 transitions, 9887 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 21:05:10,937 INFO L231 Difference]: Finished difference. Result has 567 places, 641 transitions, 7771 flow [2024-06-03 21:05:10,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7201, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7771, PETRI_PLACES=567, PETRI_TRANSITIONS=641} [2024-06-03 21:05:10,938 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 522 predicate places. [2024-06-03 21:05:10,938 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 641 transitions, 7771 flow [2024-06-03 21:05:10,938 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) [2024-06-03 21:05:10,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:05:10,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:05:10,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-03 21:05:10,939 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:05:10,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:05:10,939 INFO L85 PathProgramCache]: Analyzing trace with hash -2019797558, now seen corresponding path program 14 times [2024-06-03 21:05:10,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:05:10,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516060264] [2024-06-03 21:05:10,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:05:10,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:05:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:05:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:05:11,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:05:11,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516060264] [2024-06-03 21:05:11,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516060264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:05:11,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:05:11,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 21:05:11,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771088530] [2024-06-03 21:05:11,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:05:11,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 21:05:11,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:05:11,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 21:05:11,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 21:05:11,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-03 21:05:11,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 641 transitions, 7771 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) [2024-06-03 21:05:11,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:05:11,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-03 21:05:11,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:05:12,453 INFO L124 PetriNetUnfolderBase]: 2689/4749 cut-off events. [2024-06-03 21:05:12,453 INFO L125 PetriNetUnfolderBase]: For 1177179/1177179 co-relation queries the response was YES. [2024-06-03 21:05:12,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38302 conditions, 4749 events. 2689/4749 cut-off events. For 1177179/1177179 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 33259 event pairs, 445 based on Foata normal form. 1/4741 useless extension candidates. Maximal degree in co-relation 38058. Up to 3825 conditions per place. [2024-06-03 21:05:12,544 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 487 selfloop transitions, 166 changer transitions 0/662 dead transitions. [2024-06-03 21:05:12,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 662 transitions, 10319 flow [2024-06-03 21:05:12,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 21:05:12,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 21:05:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-03 21:05:12,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738636363636364 [2024-06-03 21:05:12,545 INFO L175 Difference]: Start difference. First operand has 567 places, 641 transitions, 7771 flow. Second operand 8 states and 202 transitions. [2024-06-03 21:05:12,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 662 transitions, 10319 flow Killed by 15