./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe023_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe023_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 20:47:03,313 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:47:03,388 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:47:03,396 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:47:03,397 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:47:03,422 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:47:03,423 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:47:03,424 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:47:03,424 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:47:03,427 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:47:03,427 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:47:03,428 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:47:03,428 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:47:03,429 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:47:03,430 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:47:03,430 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:47:03,430 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:47:03,430 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:47:03,430 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:47:03,431 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:47:03,432 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:47:03,432 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:47:03,432 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:47:03,432 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:47:03,433 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:47:03,433 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:47:03,433 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:47:03,433 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:47:03,434 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:47:03,434 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:47:03,435 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:47:03,435 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:47:03,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:47:03,435 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:47:03,435 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:47:03,436 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:47:03,436 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:47:03,436 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:47:03,436 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:47:03,436 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:47:03,436 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:47:03,437 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:47:03,437 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:47:03,437 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:47:03,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:47:03,673 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:47:03,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:47:03,677 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:47:03,678 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:47:03,679 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe023_tso.yml/witness.yml [2024-06-03 20:47:03,845 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:47:03,846 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:47:03,846 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.i [2024-06-03 20:47:04,867 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:47:05,130 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:47:05,130 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe023_tso.i [2024-06-03 20:47:05,146 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73826fba4/c094de6add73404eb25cf4c525c06909/FLAG5bd2223fc [2024-06-03 20:47:05,155 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73826fba4/c094de6add73404eb25cf4c525c06909 [2024-06-03 20:47:05,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:47:05,156 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:47:05,157 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:47:05,157 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:47:05,161 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:47:05,161 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:47:03" (1/2) ... [2024-06-03 20:47:05,162 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e0a354 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:47:05, skipping insertion in model container [2024-06-03 20:47:05,162 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:47:03" (1/2) ... [2024-06-03 20:47:05,163 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2e3b111f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:47:05, skipping insertion in model container [2024-06-03 20:47:05,163 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:47:05" (2/2) ... [2024-06-03 20:47:05,164 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e0a354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:05, skipping insertion in model container [2024-06-03 20:47:05,164 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:47:05" (2/2) ... [2024-06-03 20:47:05,164 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:47:05,209 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:47:05,210 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || (((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 127) && x <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 20:47:05,210 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || (((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 127) && x <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 20:47:05,211 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || (((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 127) && x <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 20:47:05,211 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:47:05,211 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-03 20:47:05,270 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:47:05,519 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:47:05,527 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:47:05,641 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:47:05,687 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:47:05,688 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:05 WrapperNode [2024-06-03 20:47:05,688 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:47:05,689 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:47:05,689 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:47:05,689 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:47:05,694 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:05" (1/1) ... [2024-06-03 20:47:05,720 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:05" (1/1) ... [2024-06-03 20:47:05,748 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-03 20:47:05,750 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:47:05,751 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:47:05,751 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:47:05,751 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:47:05,759 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:05" (1/1) ... [2024-06-03 20:47:05,759 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:05" (1/1) ... [2024-06-03 20:47:05,768 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:05" (1/1) ... [2024-06-03 20:47:05,786 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 20:47:05,787 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:05" (1/1) ... [2024-06-03 20:47:05,787 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:05" (1/1) ... [2024-06-03 20:47:05,800 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:05" (1/1) ... [2024-06-03 20:47:05,801 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:05" (1/1) ... [2024-06-03 20:47:05,805 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:05" (1/1) ... [2024-06-03 20:47:05,806 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:05" (1/1) ... [2024-06-03 20:47:05,808 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:47:05,811 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:47:05,813 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:47:05,813 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:47:05,813 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:05" (1/1) ... [2024-06-03 20:47:05,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:47:05,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:47:05,834 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 20:47:05,837 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 20:47:05,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:47:05,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:47:05,871 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:47:05,871 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:47:05,871 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:47:05,871 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:47:05,872 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:47:05,872 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:47:05,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:47:05,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:47:05,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:47:05,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:47:05,874 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 20:47:05,964 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:47:05,965 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:47:06,270 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:47:06,270 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:47:06,329 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:47:06,330 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:47:06,330 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:47:06 BoogieIcfgContainer [2024-06-03 20:47:06,330 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:47:06,332 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:47:06,332 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:47:06,334 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:47:06,334 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:47:03" (1/4) ... [2024-06-03 20:47:06,335 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16555cfa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:47:06, skipping insertion in model container [2024-06-03 20:47:06,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:47:05" (2/4) ... [2024-06-03 20:47:06,335 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16555cfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:47:06, skipping insertion in model container [2024-06-03 20:47:06,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:47:05" (3/4) ... [2024-06-03 20:47:06,335 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16555cfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:47:06, skipping insertion in model container [2024-06-03 20:47:06,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:47:06" (4/4) ... [2024-06-03 20:47:06,336 INFO L112 eAbstractionObserver]: Analyzing ICFG safe023_tso.i [2024-06-03 20:47:06,349 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:47:06,349 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 20:47:06,349 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:47:06,385 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:47:06,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 20:47:06,426 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-03 20:47:06,427 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:47:06,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 20:47:06,428 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 20:47:06,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-03 20:47:06,436 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:47:06,441 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;@2e887198, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:47:06,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 20:47:06,444 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:47:06,444 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 20:47:06,444 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:47:06,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:06,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:47:06,445 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 20:47:06,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:06,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1787024188, now seen corresponding path program 1 times [2024-06-03 20:47:06,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:06,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911644818] [2024-06-03 20:47:06,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:06,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:06,977 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 20:47:06,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:06,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911644818] [2024-06-03 20:47:06,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911644818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:06,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:06,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:47:06,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73184656] [2024-06-03 20:47:06,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:06,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:47:06,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:07,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:47:07,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:47:07,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-03 20:47:07,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:07,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:07,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-03 20:47:07,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:07,280 INFO L124 PetriNetUnfolderBase]: 470/795 cut-off events. [2024-06-03 20:47:07,280 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-03 20:47:07,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1596 conditions, 795 events. 470/795 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3833 event pairs, 281 based on Foata normal form. 1/752 useless extension candidates. Maximal degree in co-relation 1581. Up to 736 conditions per place. [2024-06-03 20:47:07,292 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 29 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-03 20:47:07,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 167 flow [2024-06-03 20:47:07,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:47:07,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:47:07,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-06-03 20:47:07,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2024-06-03 20:47:07,304 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 87 transitions. [2024-06-03 20:47:07,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 167 flow [2024-06-03 20:47:07,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:07,310 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-03 20:47:07,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-03 20:47:07,314 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-03 20:47:07,314 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-03 20:47:07,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:07,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:07,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:07,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:47:07,315 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 20:47:07,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:07,318 INFO L85 PathProgramCache]: Analyzing trace with hash 656708195, now seen corresponding path program 1 times [2024-06-03 20:47:07,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:07,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490604548] [2024-06-03 20:47:07,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:07,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:07,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:07,597 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 20:47:07,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:07,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490604548] [2024-06-03 20:47:07,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490604548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:07,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:07,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:47:07,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890839633] [2024-06-03 20:47:07,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:07,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:47:07,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:07,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:47:07,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:47:07,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:47:07,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:07,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:07,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:47:07,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:07,836 INFO L124 PetriNetUnfolderBase]: 781/1325 cut-off events. [2024-06-03 20:47:07,837 INFO L125 PetriNetUnfolderBase]: For 253/253 co-relation queries the response was YES. [2024-06-03 20:47:07,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2969 conditions, 1325 events. 781/1325 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6749 event pairs, 376 based on Foata normal form. 5/1321 useless extension candidates. Maximal degree in co-relation 2954. Up to 1146 conditions per place. [2024-06-03 20:47:07,847 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 44 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-06-03 20:47:07,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 62 transitions, 284 flow [2024-06-03 20:47:07,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:47:07,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:47:07,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-06-03 20:47:07,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6726190476190477 [2024-06-03 20:47:07,850 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 113 transitions. [2024-06-03 20:47:07,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 62 transitions, 284 flow [2024-06-03 20:47:07,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:47:07,853 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 173 flow [2024-06-03 20:47:07,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-06-03 20:47:07,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-03 20:47:07,854 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 173 flow [2024-06-03 20:47:07,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:07,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:07,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:07,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:47:07,855 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:07,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:07,856 INFO L85 PathProgramCache]: Analyzing trace with hash -263580670, now seen corresponding path program 1 times [2024-06-03 20:47:07,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:07,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823438642] [2024-06-03 20:47:07,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:07,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:07,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:08,080 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 20:47:08,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:08,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823438642] [2024-06-03 20:47:08,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823438642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:08,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:08,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:47:08,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570231349] [2024-06-03 20:47:08,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:08,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:47:08,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:08,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:47:08,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:47:08,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:47:08,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 173 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:08,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:08,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:47:08,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:08,328 INFO L124 PetriNetUnfolderBase]: 789/1357 cut-off events. [2024-06-03 20:47:08,328 INFO L125 PetriNetUnfolderBase]: For 893/934 co-relation queries the response was YES. [2024-06-03 20:47:08,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3596 conditions, 1357 events. 789/1357 cut-off events. For 893/934 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7079 event pairs, 265 based on Foata normal form. 15/1360 useless extension candidates. Maximal degree in co-relation 3578. Up to 1114 conditions per place. [2024-06-03 20:47:08,337 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 52 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-03 20:47:08,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 405 flow [2024-06-03 20:47:08,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:47:08,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:47:08,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-03 20:47:08,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-03 20:47:08,339 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 173 flow. Second operand 5 states and 140 transitions. [2024-06-03 20:47:08,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 405 flow [2024-06-03 20:47:08,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 76 transitions, 403 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-03 20:47:08,343 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 248 flow [2024-06-03 20:47:08,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2024-06-03 20:47:08,344 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-03 20:47:08,344 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 248 flow [2024-06-03 20:47:08,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:08,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:08,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:08,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:47:08,345 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:08,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:08,345 INFO L85 PathProgramCache]: Analyzing trace with hash -364981210, now seen corresponding path program 1 times [2024-06-03 20:47:08,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:08,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269773883] [2024-06-03 20:47:08,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:08,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:08,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:08,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269773883] [2024-06-03 20:47:08,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269773883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:08,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:08,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:47:08,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139210168] [2024-06-03 20:47:08,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:08,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:47:08,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:08,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:47:08,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:47:08,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:47:08,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 248 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:08,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:08,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:47:08,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:08,794 INFO L124 PetriNetUnfolderBase]: 773/1297 cut-off events. [2024-06-03 20:47:08,794 INFO L125 PetriNetUnfolderBase]: For 1645/1660 co-relation queries the response was YES. [2024-06-03 20:47:08,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3948 conditions, 1297 events. 773/1297 cut-off events. For 1645/1660 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6615 event pairs, 312 based on Foata normal form. 15/1305 useless extension candidates. Maximal degree in co-relation 3927. Up to 1140 conditions per place. [2024-06-03 20:47:08,803 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-06-03 20:47:08,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 65 transitions, 401 flow [2024-06-03 20:47:08,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:47:08,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:47:08,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-03 20:47:08,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2024-06-03 20:47:08,805 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 248 flow. Second operand 4 states and 107 transitions. [2024-06-03 20:47:08,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 65 transitions, 401 flow [2024-06-03 20:47:08,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 387 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-03 20:47:08,809 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 287 flow [2024-06-03 20:47:08,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=287, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-06-03 20:47:08,809 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-03 20:47:08,810 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 287 flow [2024-06-03 20:47:08,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:08,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:08,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:08,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:47:08,810 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:08,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:08,811 INFO L85 PathProgramCache]: Analyzing trace with hash -848364989, now seen corresponding path program 1 times [2024-06-03 20:47:08,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:08,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573472060] [2024-06-03 20:47:08,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:08,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:09,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:09,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:09,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573472060] [2024-06-03 20:47:09,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573472060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:09,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:09,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:09,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644706122] [2024-06-03 20:47:09,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:09,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:09,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:09,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:09,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:09,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:47:09,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 287 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:09,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:09,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:47:09,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:09,259 INFO L124 PetriNetUnfolderBase]: 781/1330 cut-off events. [2024-06-03 20:47:09,260 INFO L125 PetriNetUnfolderBase]: For 2266/2340 co-relation queries the response was YES. [2024-06-03 20:47:09,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4191 conditions, 1330 events. 781/1330 cut-off events. For 2266/2340 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6821 event pairs, 210 based on Foata normal form. 30/1350 useless extension candidates. Maximal degree in co-relation 4166. Up to 1064 conditions per place. [2024-06-03 20:47:09,268 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 56 selfloop transitions, 20 changer transitions 0/84 dead transitions. [2024-06-03 20:47:09,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 84 transitions, 537 flow [2024-06-03 20:47:09,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:09,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:09,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-03 20:47:09,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-03 20:47:09,270 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 287 flow. Second operand 6 states and 162 transitions. [2024-06-03 20:47:09,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 84 transitions, 537 flow [2024-06-03 20:47:09,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 84 transitions, 527 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-03 20:47:09,276 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 343 flow [2024-06-03 20:47:09,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=343, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-03 20:47:09,278 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-03 20:47:09,278 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 343 flow [2024-06-03 20:47:09,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:09,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:09,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:09,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:47:09,282 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 20:47:09,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:09,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1570485163, now seen corresponding path program 1 times [2024-06-03 20:47:09,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:09,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698079651] [2024-06-03 20:47:09,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:09,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:09,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:09,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698079651] [2024-06-03 20:47:09,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698079651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:09,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:09,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:47:09,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023843451] [2024-06-03 20:47:09,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:09,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:47:09,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:09,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:47:09,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:47:09,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:09,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 343 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:09,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:09,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:09,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:09,851 INFO L124 PetriNetUnfolderBase]: 955/1562 cut-off events. [2024-06-03 20:47:09,851 INFO L125 PetriNetUnfolderBase]: For 3564/3564 co-relation queries the response was YES. [2024-06-03 20:47:09,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5352 conditions, 1562 events. 955/1562 cut-off events. For 3564/3564 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7919 event pairs, 342 based on Foata normal form. 4/1558 useless extension candidates. Maximal degree in co-relation 5325. Up to 1371 conditions per place. [2024-06-03 20:47:09,859 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 67 selfloop transitions, 15 changer transitions 0/89 dead transitions. [2024-06-03 20:47:09,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 89 transitions, 677 flow [2024-06-03 20:47:09,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:47:09,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:47:09,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-03 20:47:09,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-03 20:47:09,860 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 343 flow. Second operand 5 states and 128 transitions. [2024-06-03 20:47:09,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 89 transitions, 677 flow [2024-06-03 20:47:09,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 89 transitions, 615 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:09,865 INFO L231 Difference]: Finished difference. Result has 63 places, 70 transitions, 446 flow [2024-06-03 20:47:09,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=446, PETRI_PLACES=63, PETRI_TRANSITIONS=70} [2024-06-03 20:47:09,865 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-03 20:47:09,865 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 70 transitions, 446 flow [2024-06-03 20:47:09,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:09,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:09,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:09,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:47:09,866 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:09,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:09,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1727404290, now seen corresponding path program 1 times [2024-06-03 20:47:09,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:09,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942015310] [2024-06-03 20:47:09,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:09,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:10,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:10,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942015310] [2024-06-03 20:47:10,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942015310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:10,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:10,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:47:10,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619018677] [2024-06-03 20:47:10,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:10,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:47:10,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:10,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:47:10,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:47:10,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:10,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 70 transitions, 446 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:10,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:10,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:10,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:10,296 INFO L124 PetriNetUnfolderBase]: 966/1590 cut-off events. [2024-06-03 20:47:10,297 INFO L125 PetriNetUnfolderBase]: For 4475/4481 co-relation queries the response was YES. [2024-06-03 20:47:10,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5799 conditions, 1590 events. 966/1590 cut-off events. For 4475/4481 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8096 event pairs, 346 based on Foata normal form. 6/1588 useless extension candidates. Maximal degree in co-relation 5769. Up to 1383 conditions per place. [2024-06-03 20:47:10,305 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 69 selfloop transitions, 17 changer transitions 0/93 dead transitions. [2024-06-03 20:47:10,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 723 flow [2024-06-03 20:47:10,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:47:10,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:47:10,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-03 20:47:10,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 20:47:10,307 INFO L175 Difference]: Start difference. First operand has 63 places, 70 transitions, 446 flow. Second operand 5 states and 126 transitions. [2024-06-03 20:47:10,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 723 flow [2024-06-03 20:47:10,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 717 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-03 20:47:10,313 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 521 flow [2024-06-03 20:47:10,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=521, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2024-06-03 20:47:10,314 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-03 20:47:10,314 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 521 flow [2024-06-03 20:47:10,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:10,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:10,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:10,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:47:10,315 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 20:47:10,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:10,315 INFO L85 PathProgramCache]: Analyzing trace with hash -761795358, now seen corresponding path program 2 times [2024-06-03 20:47:10,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:10,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267107817] [2024-06-03 20:47:10,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:10,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:10,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:10,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267107817] [2024-06-03 20:47:10,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267107817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:10,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:10,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:47:10,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268601605] [2024-06-03 20:47:10,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:10,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:47:10,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:10,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:47:10,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:47:10,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:10,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 521 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:10,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:10,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:10,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:10,727 INFO L124 PetriNetUnfolderBase]: 961/1587 cut-off events. [2024-06-03 20:47:10,728 INFO L125 PetriNetUnfolderBase]: For 5423/5429 co-relation queries the response was YES. [2024-06-03 20:47:10,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6026 conditions, 1587 events. 961/1587 cut-off events. For 5423/5429 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8071 event pairs, 343 based on Foata normal form. 2/1582 useless extension candidates. Maximal degree in co-relation 5992. Up to 1378 conditions per place. [2024-06-03 20:47:10,737 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 68 selfloop transitions, 20 changer transitions 0/95 dead transitions. [2024-06-03 20:47:10,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 95 transitions, 760 flow [2024-06-03 20:47:10,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:47:10,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:47:10,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-03 20:47:10,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-03 20:47:10,742 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 521 flow. Second operand 5 states and 129 transitions. [2024-06-03 20:47:10,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 95 transitions, 760 flow [2024-06-03 20:47:10,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 95 transitions, 741 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-03 20:47:10,748 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 580 flow [2024-06-03 20:47:10,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=580, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-06-03 20:47:10,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-03 20:47:10,750 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 580 flow [2024-06-03 20:47:10,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:10,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:10,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:10,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:47:10,751 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 20:47:10,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:10,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1702746890, now seen corresponding path program 1 times [2024-06-03 20:47:10,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:10,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409707874] [2024-06-03 20:47:10,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:10,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:11,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:11,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409707874] [2024-06-03 20:47:11,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409707874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:11,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:11,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:11,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406123933] [2024-06-03 20:47:11,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:11,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:11,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:11,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:11,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:11,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:11,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 580 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:11,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:11,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:11,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:11,277 INFO L124 PetriNetUnfolderBase]: 970/1591 cut-off events. [2024-06-03 20:47:11,278 INFO L125 PetriNetUnfolderBase]: For 6620/6620 co-relation queries the response was YES. [2024-06-03 20:47:11,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6234 conditions, 1591 events. 970/1591 cut-off events. For 6620/6620 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8073 event pairs, 316 based on Foata normal form. 8/1591 useless extension candidates. Maximal degree in co-relation 6197. Up to 1357 conditions per place. [2024-06-03 20:47:11,292 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 70 selfloop transitions, 23 changer transitions 0/100 dead transitions. [2024-06-03 20:47:11,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 100 transitions, 834 flow [2024-06-03 20:47:11,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:11,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:11,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 20:47:11,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-03 20:47:11,293 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 580 flow. Second operand 6 states and 148 transitions. [2024-06-03 20:47:11,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 100 transitions, 834 flow [2024-06-03 20:47:11,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 100 transitions, 810 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-03 20:47:11,304 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 634 flow [2024-06-03 20:47:11,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=634, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2024-06-03 20:47:11,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-03 20:47:11,305 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 634 flow [2024-06-03 20:47:11,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:11,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:11,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:11,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:47:11,306 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 20:47:11,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:11,306 INFO L85 PathProgramCache]: Analyzing trace with hash -512207174, now seen corresponding path program 1 times [2024-06-03 20:47:11,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:11,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806081320] [2024-06-03 20:47:11,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:11,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:11,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:11,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:11,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806081320] [2024-06-03 20:47:11,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806081320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:11,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:11,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:11,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308905864] [2024-06-03 20:47:11,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:11,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:11,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:11,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:11,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:11,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:47:11,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 634 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:11,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:11,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:47:11,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:11,869 INFO L124 PetriNetUnfolderBase]: 925/1553 cut-off events. [2024-06-03 20:47:11,870 INFO L125 PetriNetUnfolderBase]: For 8783/8816 co-relation queries the response was YES. [2024-06-03 20:47:11,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6490 conditions, 1553 events. 925/1553 cut-off events. For 8783/8816 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8064 event pairs, 282 based on Foata normal form. 33/1535 useless extension candidates. Maximal degree in co-relation 6451. Up to 1281 conditions per place. [2024-06-03 20:47:11,881 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 68 selfloop transitions, 25 changer transitions 0/108 dead transitions. [2024-06-03 20:47:11,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 108 transitions, 900 flow [2024-06-03 20:47:11,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:11,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:11,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-03 20:47:11,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-03 20:47:11,883 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 634 flow. Second operand 6 states and 157 transitions. [2024-06-03 20:47:11,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 108 transitions, 900 flow [2024-06-03 20:47:11,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 108 transitions, 846 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:11,912 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 660 flow [2024-06-03 20:47:11,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=660, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2024-06-03 20:47:11,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-03 20:47:11,914 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 660 flow [2024-06-03 20:47:11,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:11,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:11,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:11,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:47:11,914 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 20:47:11,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:11,915 INFO L85 PathProgramCache]: Analyzing trace with hash 727180166, now seen corresponding path program 2 times [2024-06-03 20:47:11,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:11,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017967618] [2024-06-03 20:47:11,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:11,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:11,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:12,179 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 20:47:12,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:12,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017967618] [2024-06-03 20:47:12,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017967618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:12,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:12,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:12,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111068420] [2024-06-03 20:47:12,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:12,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:12,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:12,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:12,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:12,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:47:12,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 660 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:12,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:12,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:47:12,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:12,444 INFO L124 PetriNetUnfolderBase]: 917/1534 cut-off events. [2024-06-03 20:47:12,445 INFO L125 PetriNetUnfolderBase]: For 9738/9777 co-relation queries the response was YES. [2024-06-03 20:47:12,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6532 conditions, 1534 events. 917/1534 cut-off events. For 9738/9777 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7966 event pairs, 284 based on Foata normal form. 40/1521 useless extension candidates. Maximal degree in co-relation 6492. Up to 1258 conditions per place. [2024-06-03 20:47:12,458 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 66 selfloop transitions, 28 changer transitions 0/109 dead transitions. [2024-06-03 20:47:12,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 109 transitions, 914 flow [2024-06-03 20:47:12,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:12,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:12,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 20:47:12,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-03 20:47:12,460 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 660 flow. Second operand 7 states and 176 transitions. [2024-06-03 20:47:12,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 109 transitions, 914 flow [2024-06-03 20:47:12,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 109 transitions, 864 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:12,469 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 675 flow [2024-06-03 20:47:12,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=675, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2024-06-03 20:47:12,470 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-03 20:47:12,470 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 675 flow [2024-06-03 20:47:12,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:12,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:12,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:12,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:47:12,471 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:12,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:12,471 INFO L85 PathProgramCache]: Analyzing trace with hash 608205135, now seen corresponding path program 1 times [2024-06-03 20:47:12,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:12,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410902829] [2024-06-03 20:47:12,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:12,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:12,752 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 20:47:12,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:12,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410902829] [2024-06-03 20:47:12,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410902829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:12,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:12,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:12,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013339531] [2024-06-03 20:47:12,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:12,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:12,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:12,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:12,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:12,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:12,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 675 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:12,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:12,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:12,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:13,069 INFO L124 PetriNetUnfolderBase]: 1005/1663 cut-off events. [2024-06-03 20:47:13,070 INFO L125 PetriNetUnfolderBase]: For 10565/10571 co-relation queries the response was YES. [2024-06-03 20:47:13,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7022 conditions, 1663 events. 1005/1663 cut-off events. For 10565/10571 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8528 event pairs, 315 based on Foata normal form. 2/1658 useless extension candidates. Maximal degree in co-relation 6981. Up to 1381 conditions per place. [2024-06-03 20:47:13,079 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 89 selfloop transitions, 30 changer transitions 0/126 dead transitions. [2024-06-03 20:47:13,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 126 transitions, 1110 flow [2024-06-03 20:47:13,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:13,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:13,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-03 20:47:13,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-03 20:47:13,080 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 675 flow. Second operand 7 states and 178 transitions. [2024-06-03 20:47:13,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 126 transitions, 1110 flow [2024-06-03 20:47:13,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 126 transitions, 1018 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:13,092 INFO L231 Difference]: Finished difference. Result has 86 places, 94 transitions, 747 flow [2024-06-03 20:47:13,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=747, PETRI_PLACES=86, PETRI_TRANSITIONS=94} [2024-06-03 20:47:13,093 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-03 20:47:13,093 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 94 transitions, 747 flow [2024-06-03 20:47:13,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:13,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:13,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:13,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:47:13,094 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:13,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:13,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1067956841, now seen corresponding path program 2 times [2024-06-03 20:47:13,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:13,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167760212] [2024-06-03 20:47:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:13,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:13,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:13,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167760212] [2024-06-03 20:47:13,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167760212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:13,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:13,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:13,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770495170] [2024-06-03 20:47:13,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:13,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:13,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:13,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:13,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:13,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:13,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 94 transitions, 747 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:13,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:13,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:13,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:13,602 INFO L124 PetriNetUnfolderBase]: 1016/1671 cut-off events. [2024-06-03 20:47:13,602 INFO L125 PetriNetUnfolderBase]: For 12073/12073 co-relation queries the response was YES. [2024-06-03 20:47:13,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7455 conditions, 1671 events. 1016/1671 cut-off events. For 12073/12073 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8541 event pairs, 312 based on Foata normal form. 2/1665 useless extension candidates. Maximal degree in co-relation 7412. Up to 1368 conditions per place. [2024-06-03 20:47:13,643 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 95 selfloop transitions, 40 changer transitions 0/142 dead transitions. [2024-06-03 20:47:13,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 142 transitions, 1270 flow [2024-06-03 20:47:13,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:47:13,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:47:13,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-03 20:47:13,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-03 20:47:13,644 INFO L175 Difference]: Start difference. First operand has 86 places, 94 transitions, 747 flow. Second operand 9 states and 219 transitions. [2024-06-03 20:47:13,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 142 transitions, 1270 flow [2024-06-03 20:47:13,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 142 transitions, 1231 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-03 20:47:13,663 INFO L231 Difference]: Finished difference. Result has 94 places, 103 transitions, 872 flow [2024-06-03 20:47:13,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=872, PETRI_PLACES=94, PETRI_TRANSITIONS=103} [2024-06-03 20:47:13,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-03 20:47:13,664 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 103 transitions, 872 flow [2024-06-03 20:47:13,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:13,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:13,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:13,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:47:13,665 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:13,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:13,666 INFO L85 PathProgramCache]: Analyzing trace with hash 755814735, now seen corresponding path program 3 times [2024-06-03 20:47:13,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:13,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850159240] [2024-06-03 20:47:13,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:13,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:13,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:13,931 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 20:47:13,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:13,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850159240] [2024-06-03 20:47:13,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850159240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:13,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:13,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:13,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364716785] [2024-06-03 20:47:13,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:13,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:13,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:13,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:13,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:13,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:13,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 103 transitions, 872 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:13,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:13,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:13,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:14,171 INFO L124 PetriNetUnfolderBase]: 1011/1664 cut-off events. [2024-06-03 20:47:14,172 INFO L125 PetriNetUnfolderBase]: For 13939/13939 co-relation queries the response was YES. [2024-06-03 20:47:14,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7897 conditions, 1664 events. 1011/1664 cut-off events. For 13939/13939 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8506 event pairs, 312 based on Foata normal form. 2/1658 useless extension candidates. Maximal degree in co-relation 7851. Up to 1363 conditions per place. [2024-06-03 20:47:14,182 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 91 selfloop transitions, 38 changer transitions 0/136 dead transitions. [2024-06-03 20:47:14,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 136 transitions, 1267 flow [2024-06-03 20:47:14,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:14,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:14,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-03 20:47:14,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-03 20:47:14,184 INFO L175 Difference]: Start difference. First operand has 94 places, 103 transitions, 872 flow. Second operand 8 states and 198 transitions. [2024-06-03 20:47:14,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 136 transitions, 1267 flow [2024-06-03 20:47:14,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 136 transitions, 1202 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:14,200 INFO L231 Difference]: Finished difference. Result has 98 places, 103 transitions, 891 flow [2024-06-03 20:47:14,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=891, PETRI_PLACES=98, PETRI_TRANSITIONS=103} [2024-06-03 20:47:14,201 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-03 20:47:14,201 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 103 transitions, 891 flow [2024-06-03 20:47:14,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:14,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:14,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:14,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:47:14,202 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:14,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:14,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1396806331, now seen corresponding path program 4 times [2024-06-03 20:47:14,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:14,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522197553] [2024-06-03 20:47:14,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:14,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:14,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:14,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522197553] [2024-06-03 20:47:14,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522197553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:14,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:14,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:14,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958224983] [2024-06-03 20:47:14,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:14,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:14,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:14,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:14,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:14,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:14,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 103 transitions, 891 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:14,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:14,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:14,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:14,675 INFO L124 PetriNetUnfolderBase]: 1022/1696 cut-off events. [2024-06-03 20:47:14,676 INFO L125 PetriNetUnfolderBase]: For 15255/15261 co-relation queries the response was YES. [2024-06-03 20:47:14,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8035 conditions, 1696 events. 1022/1696 cut-off events. For 15255/15261 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8770 event pairs, 309 based on Foata normal form. 2/1691 useless extension candidates. Maximal degree in co-relation 7987. Up to 1375 conditions per place. [2024-06-03 20:47:14,686 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 90 selfloop transitions, 41 changer transitions 0/138 dead transitions. [2024-06-03 20:47:14,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 138 transitions, 1320 flow [2024-06-03 20:47:14,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-03 20:47:14,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-03 20:47:14,688 INFO L175 Difference]: Start difference. First operand has 98 places, 103 transitions, 891 flow. Second operand 7 states and 179 transitions. [2024-06-03 20:47:14,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 138 transitions, 1320 flow [2024-06-03 20:47:14,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 138 transitions, 1210 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:14,705 INFO L231 Difference]: Finished difference. Result has 99 places, 107 transitions, 915 flow [2024-06-03 20:47:14,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=915, PETRI_PLACES=99, PETRI_TRANSITIONS=107} [2024-06-03 20:47:14,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-03 20:47:14,705 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 107 transitions, 915 flow [2024-06-03 20:47:14,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:14,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:14,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:14,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:47:14,706 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 20:47:14,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:14,707 INFO L85 PathProgramCache]: Analyzing trace with hash -52293399, now seen corresponding path program 5 times [2024-06-03 20:47:14,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:14,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948815763] [2024-06-03 20:47:14,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:14,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:14,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:14,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948815763] [2024-06-03 20:47:14,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948815763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:14,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:14,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:14,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964742218] [2024-06-03 20:47:14,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:14,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:14,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:14,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:14,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:14,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:14,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 107 transitions, 915 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:14,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:14,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:14,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:15,181 INFO L124 PetriNetUnfolderBase]: 1033/1713 cut-off events. [2024-06-03 20:47:15,181 INFO L125 PetriNetUnfolderBase]: For 17329/17335 co-relation queries the response was YES. [2024-06-03 20:47:15,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8182 conditions, 1713 events. 1033/1713 cut-off events. For 17329/17335 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8876 event pairs, 312 based on Foata normal form. 6/1711 useless extension candidates. Maximal degree in co-relation 8133. Up to 1387 conditions per place. [2024-06-03 20:47:15,191 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 91 selfloop transitions, 45 changer transitions 0/143 dead transitions. [2024-06-03 20:47:15,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 143 transitions, 1365 flow [2024-06-03 20:47:15,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:15,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-03 20:47:15,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-03 20:47:15,192 INFO L175 Difference]: Start difference. First operand has 99 places, 107 transitions, 915 flow. Second operand 8 states and 193 transitions. [2024-06-03 20:47:15,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 143 transitions, 1365 flow [2024-06-03 20:47:15,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 143 transitions, 1273 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:15,210 INFO L231 Difference]: Finished difference. Result has 102 places, 111 transitions, 959 flow [2024-06-03 20:47:15,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=959, PETRI_PLACES=102, PETRI_TRANSITIONS=111} [2024-06-03 20:47:15,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-03 20:47:15,211 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 111 transitions, 959 flow [2024-06-03 20:47:15,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:15,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:15,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:15,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:47:15,211 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 20:47:15,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:15,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2028921553, now seen corresponding path program 6 times [2024-06-03 20:47:15,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:15,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656992456] [2024-06-03 20:47:15,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:15,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:15,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:15,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:15,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656992456] [2024-06-03 20:47:15,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656992456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:15,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:15,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:15,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36793709] [2024-06-03 20:47:15,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:15,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:15,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:15,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:15,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:15,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:15,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 111 transitions, 959 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:15,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:15,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:15,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:15,680 INFO L124 PetriNetUnfolderBase]: 1028/1710 cut-off events. [2024-06-03 20:47:15,680 INFO L125 PetriNetUnfolderBase]: For 18671/18677 co-relation queries the response was YES. [2024-06-03 20:47:15,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8247 conditions, 1710 events. 1028/1710 cut-off events. For 18671/18677 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8855 event pairs, 309 based on Foata normal form. 2/1705 useless extension candidates. Maximal degree in co-relation 8197. Up to 1382 conditions per place. [2024-06-03 20:47:15,691 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 95 selfloop transitions, 46 changer transitions 0/148 dead transitions. [2024-06-03 20:47:15,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 148 transitions, 1335 flow [2024-06-03 20:47:15,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:47:15,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:47:15,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-03 20:47:15,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-03 20:47:15,692 INFO L175 Difference]: Start difference. First operand has 102 places, 111 transitions, 959 flow. Second operand 9 states and 219 transitions. [2024-06-03 20:47:15,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 148 transitions, 1335 flow [2024-06-03 20:47:15,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 148 transitions, 1270 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:15,714 INFO L231 Difference]: Finished difference. Result has 107 places, 111 transitions, 994 flow [2024-06-03 20:47:15,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=994, PETRI_PLACES=107, PETRI_TRANSITIONS=111} [2024-06-03 20:47:15,715 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-03 20:47:15,715 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 111 transitions, 994 flow [2024-06-03 20:47:15,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:15,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:15,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:15,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:47:15,715 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 20:47:15,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:15,716 INFO L85 PathProgramCache]: Analyzing trace with hash -2028913617, now seen corresponding path program 1 times [2024-06-03 20:47:15,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:15,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183344552] [2024-06-03 20:47:15,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:15,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:15,917 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 20:47:15,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:15,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183344552] [2024-06-03 20:47:15,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183344552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:15,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:15,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:15,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540397986] [2024-06-03 20:47:15,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:15,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:15,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:15,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:15,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:15,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:15,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 111 transitions, 994 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:15,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:15,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:15,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:16,143 INFO L124 PetriNetUnfolderBase]: 1045/1737 cut-off events. [2024-06-03 20:47:16,143 INFO L125 PetriNetUnfolderBase]: For 21148/21154 co-relation queries the response was YES. [2024-06-03 20:47:16,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8508 conditions, 1737 events. 1045/1737 cut-off events. For 21148/21154 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8987 event pairs, 309 based on Foata normal form. 4/1734 useless extension candidates. Maximal degree in co-relation 8457. Up to 1487 conditions per place. [2024-06-03 20:47:16,154 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 107 selfloop transitions, 22 changer transitions 0/136 dead transitions. [2024-06-03 20:47:16,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 136 transitions, 1326 flow [2024-06-03 20:47:16,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:16,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:16,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-03 20:47:16,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-03 20:47:16,156 INFO L175 Difference]: Start difference. First operand has 107 places, 111 transitions, 994 flow. Second operand 6 states and 150 transitions. [2024-06-03 20:47:16,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 136 transitions, 1326 flow [2024-06-03 20:47:16,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 136 transitions, 1214 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 20:47:16,182 INFO L231 Difference]: Finished difference. Result has 105 places, 113 transitions, 953 flow [2024-06-03 20:47:16,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=953, PETRI_PLACES=105, PETRI_TRANSITIONS=113} [2024-06-03 20:47:16,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-03 20:47:16,182 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 113 transitions, 953 flow [2024-06-03 20:47:16,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:16,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:16,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:16,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:47:16,183 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 20:47:16,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:16,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1933722735, now seen corresponding path program 2 times [2024-06-03 20:47:16,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:16,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168222480] [2024-06-03 20:47:16,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:16,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:16,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:16,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168222480] [2024-06-03 20:47:16,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168222480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:16,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:16,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:16,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97486692] [2024-06-03 20:47:16,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:16,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:16,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:16,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:16,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:16,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:16,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 113 transitions, 953 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:16,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:16,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:16,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:16,650 INFO L124 PetriNetUnfolderBase]: 1062/1765 cut-off events. [2024-06-03 20:47:16,650 INFO L125 PetriNetUnfolderBase]: For 23440/23446 co-relation queries the response was YES. [2024-06-03 20:47:16,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8741 conditions, 1765 events. 1062/1765 cut-off events. For 23440/23446 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9214 event pairs, 317 based on Foata normal form. 8/1765 useless extension candidates. Maximal degree in co-relation 8689. Up to 1514 conditions per place. [2024-06-03 20:47:16,662 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 108 selfloop transitions, 20 changer transitions 0/135 dead transitions. [2024-06-03 20:47:16,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 135 transitions, 1279 flow [2024-06-03 20:47:16,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:16,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:16,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-03 20:47:16,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-03 20:47:16,664 INFO L175 Difference]: Start difference. First operand has 105 places, 113 transitions, 953 flow. Second operand 6 states and 145 transitions. [2024-06-03 20:47:16,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 135 transitions, 1279 flow [2024-06-03 20:47:16,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 135 transitions, 1226 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:16,691 INFO L231 Difference]: Finished difference. Result has 107 places, 115 transitions, 971 flow [2024-06-03 20:47:16,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=971, PETRI_PLACES=107, PETRI_TRANSITIONS=115} [2024-06-03 20:47:16,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-03 20:47:16,691 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 115 transitions, 971 flow [2024-06-03 20:47:16,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:16,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:16,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:16,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:47:16,692 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 20:47:16,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:16,693 INFO L85 PathProgramCache]: Analyzing trace with hash -42762263, now seen corresponding path program 3 times [2024-06-03 20:47:16,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:16,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618043850] [2024-06-03 20:47:16,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:16,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:16,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:16,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618043850] [2024-06-03 20:47:16,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618043850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:16,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:16,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:16,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927363195] [2024-06-03 20:47:16,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:16,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:16,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:16,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:16,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:16,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:16,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 115 transitions, 971 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:16,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:16,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:16,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:17,119 INFO L124 PetriNetUnfolderBase]: 1054/1752 cut-off events. [2024-06-03 20:47:17,120 INFO L125 PetriNetUnfolderBase]: For 25184/25190 co-relation queries the response was YES. [2024-06-03 20:47:17,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8807 conditions, 1752 events. 1054/1752 cut-off events. For 25184/25190 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9145 event pairs, 286 based on Foata normal form. 8/1752 useless extension candidates. Maximal degree in co-relation 8754. Up to 1425 conditions per place. [2024-06-03 20:47:17,131 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 105 selfloop transitions, 26 changer transitions 0/138 dead transitions. [2024-06-03 20:47:17,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 138 transitions, 1309 flow [2024-06-03 20:47:17,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:17,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:17,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-03 20:47:17,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-03 20:47:17,134 INFO L175 Difference]: Start difference. First operand has 107 places, 115 transitions, 971 flow. Second operand 6 states and 146 transitions. [2024-06-03 20:47:17,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 138 transitions, 1309 flow [2024-06-03 20:47:17,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 138 transitions, 1256 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:17,198 INFO L231 Difference]: Finished difference. Result has 109 places, 117 transitions, 1005 flow [2024-06-03 20:47:17,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1005, PETRI_PLACES=109, PETRI_TRANSITIONS=117} [2024-06-03 20:47:17,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-03 20:47:17,198 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 117 transitions, 1005 flow [2024-06-03 20:47:17,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:17,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:17,198 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 20:47:17,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:47:17,199 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 20:47:17,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:17,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1692425491, now seen corresponding path program 1 times [2024-06-03 20:47:17,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:17,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44747856] [2024-06-03 20:47:17,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:17,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:17,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:17,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44747856] [2024-06-03 20:47:17,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44747856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:17,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:17,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:17,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116109323] [2024-06-03 20:47:17,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:17,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:17,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:17,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:17,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:17,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:47:17,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 117 transitions, 1005 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:17,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:17,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:47:17,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:17,773 INFO L124 PetriNetUnfolderBase]: 1055/1778 cut-off events. [2024-06-03 20:47:17,774 INFO L125 PetriNetUnfolderBase]: For 30598/30632 co-relation queries the response was YES. [2024-06-03 20:47:17,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9298 conditions, 1778 events. 1055/1778 cut-off events. For 30598/30632 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9550 event pairs, 179 based on Foata normal form. 10/1730 useless extension candidates. Maximal degree in co-relation 9244. Up to 1353 conditions per place. [2024-06-03 20:47:17,786 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 94 selfloop transitions, 37 changer transitions 0/158 dead transitions. [2024-06-03 20:47:17,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 158 transitions, 1471 flow [2024-06-03 20:47:17,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:17,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:17,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-03 20:47:17,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-03 20:47:17,788 INFO L175 Difference]: Start difference. First operand has 109 places, 117 transitions, 1005 flow. Second operand 8 states and 204 transitions. [2024-06-03 20:47:17,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 158 transitions, 1471 flow [2024-06-03 20:47:17,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 158 transitions, 1402 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:17,816 INFO L231 Difference]: Finished difference. Result has 113 places, 121 transitions, 1053 flow [2024-06-03 20:47:17,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1053, PETRI_PLACES=113, PETRI_TRANSITIONS=121} [2024-06-03 20:47:17,817 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-03 20:47:17,817 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 121 transitions, 1053 flow [2024-06-03 20:47:17,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:17,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:17,817 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 20:47:17,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:47:17,817 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 20:47:17,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:17,818 INFO L85 PathProgramCache]: Analyzing trace with hash -785006771, now seen corresponding path program 2 times [2024-06-03 20:47:17,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:17,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766880546] [2024-06-03 20:47:17,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:17,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:18,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:18,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766880546] [2024-06-03 20:47:18,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766880546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:18,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:18,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:18,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304042673] [2024-06-03 20:47:18,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:18,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:18,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:18,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:18,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:18,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:47:18,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 121 transitions, 1053 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:18,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:18,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:47:18,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:18,386 INFO L124 PetriNetUnfolderBase]: 1043/1758 cut-off events. [2024-06-03 20:47:18,386 INFO L125 PetriNetUnfolderBase]: For 32326/32361 co-relation queries the response was YES. [2024-06-03 20:47:18,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9363 conditions, 1758 events. 1043/1758 cut-off events. For 32326/32361 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9409 event pairs, 246 based on Foata normal form. 8/1707 useless extension candidates. Maximal degree in co-relation 9308. Up to 1409 conditions per place. [2024-06-03 20:47:18,400 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 91 selfloop transitions, 37 changer transitions 0/155 dead transitions. [2024-06-03 20:47:18,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 155 transitions, 1395 flow [2024-06-03 20:47:18,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:18,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:18,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-03 20:47:18,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-03 20:47:18,401 INFO L175 Difference]: Start difference. First operand has 113 places, 121 transitions, 1053 flow. Second operand 8 states and 201 transitions. [2024-06-03 20:47:18,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 155 transitions, 1395 flow [2024-06-03 20:47:18,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 155 transitions, 1335 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:18,429 INFO L231 Difference]: Finished difference. Result has 117 places, 121 transitions, 1075 flow [2024-06-03 20:47:18,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1075, PETRI_PLACES=117, PETRI_TRANSITIONS=121} [2024-06-03 20:47:18,430 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-03 20:47:18,430 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 121 transitions, 1075 flow [2024-06-03 20:47:18,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:18,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:18,430 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 20:47:18,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:47:18,430 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:18,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:18,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1259509531, now seen corresponding path program 3 times [2024-06-03 20:47:18,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:18,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29296356] [2024-06-03 20:47:18,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:18,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:18,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:18,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29296356] [2024-06-03 20:47:18,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29296356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:18,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:18,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:18,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356041690] [2024-06-03 20:47:18,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:18,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:18,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:18,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:18,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:18,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:47:18,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 121 transitions, 1075 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:18,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:18,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:47:18,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:18,973 INFO L124 PetriNetUnfolderBase]: 1031/1732 cut-off events. [2024-06-03 20:47:18,973 INFO L125 PetriNetUnfolderBase]: For 33642/33671 co-relation queries the response was YES. [2024-06-03 20:47:18,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9329 conditions, 1732 events. 1031/1732 cut-off events. For 33642/33671 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9221 event pairs, 244 based on Foata normal form. 6/1678 useless extension candidates. Maximal degree in co-relation 9272. Up to 1392 conditions per place. [2024-06-03 20:47:18,986 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 90 selfloop transitions, 37 changer transitions 0/154 dead transitions. [2024-06-03 20:47:18,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 154 transitions, 1427 flow [2024-06-03 20:47:18,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:18,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:18,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-03 20:47:18,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-03 20:47:18,987 INFO L175 Difference]: Start difference. First operand has 117 places, 121 transitions, 1075 flow. Second operand 8 states and 198 transitions. [2024-06-03 20:47:18,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 154 transitions, 1427 flow [2024-06-03 20:47:19,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 154 transitions, 1344 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:19,017 INFO L231 Difference]: Finished difference. Result has 118 places, 123 transitions, 1098 flow [2024-06-03 20:47:19,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1098, PETRI_PLACES=118, PETRI_TRANSITIONS=123} [2024-06-03 20:47:19,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-03 20:47:19,018 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 123 transitions, 1098 flow [2024-06-03 20:47:19,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:19,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:19,018 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 20:47:19,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:47:19,018 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 20:47:19,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:19,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1063539590, now seen corresponding path program 1 times [2024-06-03 20:47:19,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:19,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472427848] [2024-06-03 20:47:19,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:19,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:19,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:19,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472427848] [2024-06-03 20:47:19,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472427848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:19,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:19,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:19,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258517850] [2024-06-03 20:47:19,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:19,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:19,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:19,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:19,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:19,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:19,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 123 transitions, 1098 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:19,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:19,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:19,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:19,501 INFO L124 PetriNetUnfolderBase]: 1119/1867 cut-off events. [2024-06-03 20:47:19,502 INFO L125 PetriNetUnfolderBase]: For 33407/33413 co-relation queries the response was YES. [2024-06-03 20:47:19,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9970 conditions, 1867 events. 1119/1867 cut-off events. For 33407/33413 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9895 event pairs, 280 based on Foata normal form. 6/1868 useless extension candidates. Maximal degree in co-relation 9912. Up to 1590 conditions per place. [2024-06-03 20:47:19,515 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 116 selfloop transitions, 34 changer transitions 0/157 dead transitions. [2024-06-03 20:47:19,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 157 transitions, 1705 flow [2024-06-03 20:47:19,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:19,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:19,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 20:47:19,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-03 20:47:19,516 INFO L175 Difference]: Start difference. First operand has 118 places, 123 transitions, 1098 flow. Second operand 6 states and 149 transitions. [2024-06-03 20:47:19,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 157 transitions, 1705 flow [2024-06-03 20:47:19,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 157 transitions, 1611 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:19,553 INFO L231 Difference]: Finished difference. Result has 120 places, 139 transitions, 1287 flow [2024-06-03 20:47:19,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1287, PETRI_PLACES=120, PETRI_TRANSITIONS=139} [2024-06-03 20:47:19,553 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-03 20:47:19,553 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 139 transitions, 1287 flow [2024-06-03 20:47:19,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:19,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:19,554 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 20:47:19,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:47:19,554 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 20:47:19,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:19,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1603426650, now seen corresponding path program 2 times [2024-06-03 20:47:19,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:19,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224587901] [2024-06-03 20:47:19,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:19,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:19,805 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 20:47:19,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:19,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224587901] [2024-06-03 20:47:19,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224587901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:19,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:19,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:19,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874803879] [2024-06-03 20:47:19,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:19,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:19,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:19,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:19,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:19,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:19,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 139 transitions, 1287 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:19,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:19,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:19,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:20,080 INFO L124 PetriNetUnfolderBase]: 1147/1909 cut-off events. [2024-06-03 20:47:20,081 INFO L125 PetriNetUnfolderBase]: For 36483/36483 co-relation queries the response was YES. [2024-06-03 20:47:20,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10599 conditions, 1909 events. 1147/1909 cut-off events. For 36483/36483 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10066 event pairs, 270 based on Foata normal form. 2/1908 useless extension candidates. Maximal degree in co-relation 10538. Up to 1648 conditions per place. [2024-06-03 20:47:20,096 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 125 selfloop transitions, 34 changer transitions 0/166 dead transitions. [2024-06-03 20:47:20,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 166 transitions, 1802 flow [2024-06-03 20:47:20,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:47:20,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:47:20,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-03 20:47:20,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-03 20:47:20,098 INFO L175 Difference]: Start difference. First operand has 120 places, 139 transitions, 1287 flow. Second operand 5 states and 132 transitions. [2024-06-03 20:47:20,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 166 transitions, 1802 flow [2024-06-03 20:47:20,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 166 transitions, 1762 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-06-03 20:47:20,144 INFO L231 Difference]: Finished difference. Result has 126 places, 147 transitions, 1473 flow [2024-06-03 20:47:20,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1473, PETRI_PLACES=126, PETRI_TRANSITIONS=147} [2024-06-03 20:47:20,144 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-03 20:47:20,144 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 147 transitions, 1473 flow [2024-06-03 20:47:20,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:20,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:20,145 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 20:47:20,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:47:20,145 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 20:47:20,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:20,146 INFO L85 PathProgramCache]: Analyzing trace with hash -536055482, now seen corresponding path program 3 times [2024-06-03 20:47:20,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:20,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712909686] [2024-06-03 20:47:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:20,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:20,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:20,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712909686] [2024-06-03 20:47:20,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712909686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:20,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:20,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:20,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115054806] [2024-06-03 20:47:20,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:20,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:20,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:20,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:20,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:20,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:20,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 147 transitions, 1473 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:20,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:20,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:20,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:20,717 INFO L124 PetriNetUnfolderBase]: 1149/1917 cut-off events. [2024-06-03 20:47:20,717 INFO L125 PetriNetUnfolderBase]: For 39723/39729 co-relation queries the response was YES. [2024-06-03 20:47:20,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10889 conditions, 1917 events. 1149/1917 cut-off events. For 39723/39729 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10182 event pairs, 282 based on Foata normal form. 6/1918 useless extension candidates. Maximal degree in co-relation 10824. Up to 1622 conditions per place. [2024-06-03 20:47:20,733 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 115 selfloop transitions, 45 changer transitions 0/167 dead transitions. [2024-06-03 20:47:20,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 167 transitions, 1977 flow [2024-06-03 20:47:20,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:47:20,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:47:20,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-03 20:47:20,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-03 20:47:20,735 INFO L175 Difference]: Start difference. First operand has 126 places, 147 transitions, 1473 flow. Second operand 5 states and 130 transitions. [2024-06-03 20:47:20,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 167 transitions, 1977 flow [2024-06-03 20:47:20,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 167 transitions, 1928 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-03 20:47:20,790 INFO L231 Difference]: Finished difference. Result has 129 places, 150 transitions, 1568 flow [2024-06-03 20:47:20,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1568, PETRI_PLACES=129, PETRI_TRANSITIONS=150} [2024-06-03 20:47:20,791 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-03 20:47:20,791 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 150 transitions, 1568 flow [2024-06-03 20:47:20,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:20,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:20,791 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 20:47:20,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:47:20,791 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 20:47:20,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:20,792 INFO L85 PathProgramCache]: Analyzing trace with hash 236855980, now seen corresponding path program 1 times [2024-06-03 20:47:20,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:20,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314027953] [2024-06-03 20:47:20,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:20,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:21,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:21,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314027953] [2024-06-03 20:47:21,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314027953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:21,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:21,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:21,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429147056] [2024-06-03 20:47:21,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:21,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:21,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:21,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:21,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:21,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:21,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 150 transitions, 1568 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:21,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:21,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:21,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:21,331 INFO L124 PetriNetUnfolderBase]: 1167/1944 cut-off events. [2024-06-03 20:47:21,331 INFO L125 PetriNetUnfolderBase]: For 43429/43429 co-relation queries the response was YES. [2024-06-03 20:47:21,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11226 conditions, 1944 events. 1167/1944 cut-off events. For 43429/43429 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 10351 event pairs, 292 based on Foata normal form. 2/1938 useless extension candidates. Maximal degree in co-relation 11160. Up to 1629 conditions per place. [2024-06-03 20:47:21,346 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 134 selfloop transitions, 38 changer transitions 0/179 dead transitions. [2024-06-03 20:47:21,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 179 transitions, 2182 flow [2024-06-03 20:47:21,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:21,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:21,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 20:47:21,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-03 20:47:21,347 INFO L175 Difference]: Start difference. First operand has 129 places, 150 transitions, 1568 flow. Second operand 6 states and 149 transitions. [2024-06-03 20:47:21,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 179 transitions, 2182 flow [2024-06-03 20:47:21,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 179 transitions, 2076 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:21,394 INFO L231 Difference]: Finished difference. Result has 132 places, 161 transitions, 1679 flow [2024-06-03 20:47:21,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1679, PETRI_PLACES=132, PETRI_TRANSITIONS=161} [2024-06-03 20:47:21,394 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-03 20:47:21,395 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 161 transitions, 1679 flow [2024-06-03 20:47:21,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:21,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:21,395 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 20:47:21,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:47:21,395 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 20:47:21,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:21,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1233432248, now seen corresponding path program 1 times [2024-06-03 20:47:21,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:21,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047873630] [2024-06-03 20:47:21,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:21,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:21,628 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 20:47:21,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:21,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047873630] [2024-06-03 20:47:21,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047873630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:21,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:21,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:21,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209359128] [2024-06-03 20:47:21,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:21,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:21,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:21,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:21,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:21,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:21,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 161 transitions, 1679 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:21,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:21,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:21,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:21,916 INFO L124 PetriNetUnfolderBase]: 1187/1978 cut-off events. [2024-06-03 20:47:21,916 INFO L125 PetriNetUnfolderBase]: For 44464/44464 co-relation queries the response was YES. [2024-06-03 20:47:21,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11641 conditions, 1978 events. 1187/1978 cut-off events. For 44464/44464 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10535 event pairs, 288 based on Foata normal form. 2/1973 useless extension candidates. Maximal degree in co-relation 11575. Up to 1663 conditions per place. [2024-06-03 20:47:21,931 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 125 selfloop transitions, 52 changer transitions 0/184 dead transitions. [2024-06-03 20:47:21,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 184 transitions, 2306 flow [2024-06-03 20:47:21,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:21,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:21,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-03 20:47:21,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-03 20:47:21,932 INFO L175 Difference]: Start difference. First operand has 132 places, 161 transitions, 1679 flow. Second operand 6 states and 146 transitions. [2024-06-03 20:47:21,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 184 transitions, 2306 flow [2024-06-03 20:47:21,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 184 transitions, 2242 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-03 20:47:21,990 INFO L231 Difference]: Finished difference. Result has 138 places, 169 transitions, 1866 flow [2024-06-03 20:47:21,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1619, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1866, PETRI_PLACES=138, PETRI_TRANSITIONS=169} [2024-06-03 20:47:21,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-03 20:47:21,991 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 169 transitions, 1866 flow [2024-06-03 20:47:21,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:21,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:21,991 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 20:47:21,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:47:21,991 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 20:47:21,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:21,992 INFO L85 PathProgramCache]: Analyzing trace with hash 332279124, now seen corresponding path program 2 times [2024-06-03 20:47:21,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:21,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172599673] [2024-06-03 20:47:21,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:21,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:22,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:22,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:22,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172599673] [2024-06-03 20:47:22,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172599673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:22,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:22,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:22,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750279730] [2024-06-03 20:47:22,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:22,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:22,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:22,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:22,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:22,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:22,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 169 transitions, 1866 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:22,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:22,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:22,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:22,532 INFO L124 PetriNetUnfolderBase]: 1197/1995 cut-off events. [2024-06-03 20:47:22,533 INFO L125 PetriNetUnfolderBase]: For 47702/47702 co-relation queries the response was YES. [2024-06-03 20:47:22,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11945 conditions, 1995 events. 1197/1995 cut-off events. For 47702/47702 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10600 event pairs, 280 based on Foata normal form. 2/1990 useless extension candidates. Maximal degree in co-relation 11875. Up to 1726 conditions per place. [2024-06-03 20:47:22,549 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 148 selfloop transitions, 31 changer transitions 0/186 dead transitions. [2024-06-03 20:47:22,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 186 transitions, 2296 flow [2024-06-03 20:47:22,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:22,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:22,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-03 20:47:22,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-03 20:47:22,550 INFO L175 Difference]: Start difference. First operand has 138 places, 169 transitions, 1866 flow. Second operand 6 states and 142 transitions. [2024-06-03 20:47:22,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 186 transitions, 2296 flow [2024-06-03 20:47:22,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 186 transitions, 2148 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:22,614 INFO L231 Difference]: Finished difference. Result has 141 places, 173 transitions, 1835 flow [2024-06-03 20:47:22,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1835, PETRI_PLACES=141, PETRI_TRANSITIONS=173} [2024-06-03 20:47:22,615 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-03 20:47:22,615 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 173 transitions, 1835 flow [2024-06-03 20:47:22,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:22,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:22,615 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 20:47:22,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:47:22,616 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 20:47:22,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:22,616 INFO L85 PathProgramCache]: Analyzing trace with hash -497409828, now seen corresponding path program 2 times [2024-06-03 20:47:22,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:22,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310381082] [2024-06-03 20:47:22,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:22,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:22,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:22,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310381082] [2024-06-03 20:47:22,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310381082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:22,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:22,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:22,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848269529] [2024-06-03 20:47:22,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:22,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:22,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:22,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:22,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:22,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:22,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 173 transitions, 1835 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:22,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:22,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:22,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:23,102 INFO L124 PetriNetUnfolderBase]: 1199/1999 cut-off events. [2024-06-03 20:47:23,102 INFO L125 PetriNetUnfolderBase]: For 49883/49883 co-relation queries the response was YES. [2024-06-03 20:47:23,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11955 conditions, 1999 events. 1199/1999 cut-off events. For 49883/49883 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10681 event pairs, 288 based on Foata normal form. 2/1994 useless extension candidates. Maximal degree in co-relation 11885. Up to 1681 conditions per place. [2024-06-03 20:47:23,117 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 128 selfloop transitions, 55 changer transitions 0/190 dead transitions. [2024-06-03 20:47:23,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 190 transitions, 2392 flow [2024-06-03 20:47:23,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:47:23,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:47:23,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-03 20:47:23,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-06-03 20:47:23,118 INFO L175 Difference]: Start difference. First operand has 141 places, 173 transitions, 1835 flow. Second operand 5 states and 127 transitions. [2024-06-03 20:47:23,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 190 transitions, 2392 flow [2024-06-03 20:47:23,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 190 transitions, 2301 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:23,190 INFO L231 Difference]: Finished difference. Result has 141 places, 176 transitions, 1911 flow [2024-06-03 20:47:23,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1744, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1911, PETRI_PLACES=141, PETRI_TRANSITIONS=176} [2024-06-03 20:47:23,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-03 20:47:23,191 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 176 transitions, 1911 flow [2024-06-03 20:47:23,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:23,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:23,191 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 20:47:23,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:47:23,192 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 20:47:23,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:23,192 INFO L85 PathProgramCache]: Analyzing trace with hash -535840404, now seen corresponding path program 3 times [2024-06-03 20:47:23,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:23,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132216416] [2024-06-03 20:47:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:23,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:23,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:23,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:23,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132216416] [2024-06-03 20:47:23,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132216416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:23,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:23,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:23,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837364157] [2024-06-03 20:47:23,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:23,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:23,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:23,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:23,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:23,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:23,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 176 transitions, 1911 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:23,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:23,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:23,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:23,695 INFO L124 PetriNetUnfolderBase]: 1201/2005 cut-off events. [2024-06-03 20:47:23,696 INFO L125 PetriNetUnfolderBase]: For 52307/52307 co-relation queries the response was YES. [2024-06-03 20:47:23,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12114 conditions, 2005 events. 1201/2005 cut-off events. For 52307/52307 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10724 event pairs, 280 based on Foata normal form. 2/2000 useless extension candidates. Maximal degree in co-relation 12044. Up to 1680 conditions per place. [2024-06-03 20:47:23,714 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 145 selfloop transitions, 47 changer transitions 0/199 dead transitions. [2024-06-03 20:47:23,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 199 transitions, 2443 flow [2024-06-03 20:47:23,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:23,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-03 20:47:23,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-03 20:47:23,715 INFO L175 Difference]: Start difference. First operand has 141 places, 176 transitions, 1911 flow. Second operand 6 states and 150 transitions. [2024-06-03 20:47:23,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 199 transitions, 2443 flow [2024-06-03 20:47:23,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 199 transitions, 2305 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:23,810 INFO L231 Difference]: Finished difference. Result has 145 places, 179 transitions, 1947 flow [2024-06-03 20:47:23,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1775, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1947, PETRI_PLACES=145, PETRI_TRANSITIONS=179} [2024-06-03 20:47:23,810 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-03 20:47:23,811 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 179 transitions, 1947 flow [2024-06-03 20:47:23,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:23,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:23,811 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 20:47:23,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:47:23,811 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 20:47:23,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:23,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1739189820, now seen corresponding path program 3 times [2024-06-03 20:47:23,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:23,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044105777] [2024-06-03 20:47:23,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:23,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:24,049 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 20:47:24,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:24,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044105777] [2024-06-03 20:47:24,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044105777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:24,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:24,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:24,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339056126] [2024-06-03 20:47:24,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:24,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:24,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:24,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:24,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:24,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:24,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 179 transitions, 1947 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:24,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:24,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:24,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:24,334 INFO L124 PetriNetUnfolderBase]: 1193/2002 cut-off events. [2024-06-03 20:47:24,334 INFO L125 PetriNetUnfolderBase]: For 50770/50770 co-relation queries the response was YES. [2024-06-03 20:47:24,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12012 conditions, 2002 events. 1193/2002 cut-off events. For 50770/50770 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10745 event pairs, 266 based on Foata normal form. 2/2001 useless extension candidates. Maximal degree in co-relation 11941. Up to 1712 conditions per place. [2024-06-03 20:47:24,348 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 152 selfloop transitions, 38 changer transitions 0/197 dead transitions. [2024-06-03 20:47:24,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 197 transitions, 2373 flow [2024-06-03 20:47:24,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:47:24,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:47:24,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-03 20:47:24,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6238095238095238 [2024-06-03 20:47:24,350 INFO L175 Difference]: Start difference. First operand has 145 places, 179 transitions, 1947 flow. Second operand 5 states and 131 transitions. [2024-06-03 20:47:24,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 197 transitions, 2373 flow [2024-06-03 20:47:24,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 197 transitions, 2262 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:24,423 INFO L231 Difference]: Finished difference. Result has 146 places, 179 transitions, 1936 flow [2024-06-03 20:47:24,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1936, PETRI_PLACES=146, PETRI_TRANSITIONS=179} [2024-06-03 20:47:24,423 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-03 20:47:24,424 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 179 transitions, 1936 flow [2024-06-03 20:47:24,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:24,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:24,424 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 20:47:24,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:47:24,424 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 20:47:24,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:24,425 INFO L85 PathProgramCache]: Analyzing trace with hash -535594140, now seen corresponding path program 1 times [2024-06-03 20:47:24,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:24,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654895412] [2024-06-03 20:47:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:24,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:24,659 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 20:47:24,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:24,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654895412] [2024-06-03 20:47:24,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654895412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:24,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:24,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:24,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683143517] [2024-06-03 20:47:24,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:24,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:24,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:24,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:24,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:24,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 20:47:24,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 179 transitions, 1936 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:24,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:24,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 20:47:24,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:24,919 INFO L124 PetriNetUnfolderBase]: 1129/1936 cut-off events. [2024-06-03 20:47:24,919 INFO L125 PetriNetUnfolderBase]: For 49296/49296 co-relation queries the response was YES. [2024-06-03 20:47:24,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11529 conditions, 1936 events. 1129/1936 cut-off events. For 49296/49296 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10557 event pairs, 265 based on Foata normal form. 2/1935 useless extension candidates. Maximal degree in co-relation 11457. Up to 1588 conditions per place. [2024-06-03 20:47:24,933 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 146 selfloop transitions, 10 changer transitions 0/190 dead transitions. [2024-06-03 20:47:24,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 190 transitions, 2294 flow [2024-06-03 20:47:24,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:47:24,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:47:24,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-03 20:47:24,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-03 20:47:24,935 INFO L175 Difference]: Start difference. First operand has 146 places, 179 transitions, 1936 flow. Second operand 4 states and 101 transitions. [2024-06-03 20:47:24,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 190 transitions, 2294 flow [2024-06-03 20:47:24,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 190 transitions, 2218 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:24,999 INFO L231 Difference]: Finished difference. Result has 146 places, 181 transitions, 1913 flow [2024-06-03 20:47:25,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1860, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1913, PETRI_PLACES=146, PETRI_TRANSITIONS=181} [2024-06-03 20:47:25,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-03 20:47:25,000 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 181 transitions, 1913 flow [2024-06-03 20:47:25,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:25,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:25,001 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 20:47:25,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:47:25,001 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:25,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:25,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1346028900, now seen corresponding path program 1 times [2024-06-03 20:47:25,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:25,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804962002] [2024-06-03 20:47:25,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:25,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:25,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:25,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:25,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804962002] [2024-06-03 20:47:25,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804962002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:25,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:25,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:25,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674917730] [2024-06-03 20:47:25,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:25,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:25,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:25,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:25,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:25,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:25,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 181 transitions, 1913 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:25,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:25,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:25,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:25,668 INFO L124 PetriNetUnfolderBase]: 1315/2228 cut-off events. [2024-06-03 20:47:25,669 INFO L125 PetriNetUnfolderBase]: For 64005/64011 co-relation queries the response was YES. [2024-06-03 20:47:25,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13193 conditions, 2228 events. 1315/2228 cut-off events. For 64005/64011 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12391 event pairs, 217 based on Foata normal form. 12/2233 useless extension candidates. Maximal degree in co-relation 13120. Up to 1496 conditions per place. [2024-06-03 20:47:25,689 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 49 changer transitions 0/239 dead transitions. [2024-06-03 20:47:25,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 239 transitions, 2686 flow [2024-06-03 20:47:25,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:47:25,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:47:25,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2024-06-03 20:47:25,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2024-06-03 20:47:25,690 INFO L175 Difference]: Start difference. First operand has 146 places, 181 transitions, 1913 flow. Second operand 10 states and 248 transitions. [2024-06-03 20:47:25,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 239 transitions, 2686 flow [2024-06-03 20:47:25,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 239 transitions, 2649 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-03 20:47:25,786 INFO L231 Difference]: Finished difference. Result has 156 places, 186 transitions, 2054 flow [2024-06-03 20:47:25,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1876, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2054, PETRI_PLACES=156, PETRI_TRANSITIONS=186} [2024-06-03 20:47:25,787 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-03 20:47:25,787 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 186 transitions, 2054 flow [2024-06-03 20:47:25,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:25,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:25,787 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 20:47:25,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:47:25,787 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:25,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:25,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1434594660, now seen corresponding path program 2 times [2024-06-03 20:47:25,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:25,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635966155] [2024-06-03 20:47:25,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:25,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:25,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:26,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:26,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635966155] [2024-06-03 20:47:26,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635966155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:26,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:26,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:26,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679102372] [2024-06-03 20:47:26,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:26,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:26,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:26,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:26,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:26,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:26,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 186 transitions, 2054 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:26,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:26,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:26,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:26,530 INFO L124 PetriNetUnfolderBase]: 1442/2451 cut-off events. [2024-06-03 20:47:26,530 INFO L125 PetriNetUnfolderBase]: For 75303/75309 co-relation queries the response was YES. [2024-06-03 20:47:26,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14919 conditions, 2451 events. 1442/2451 cut-off events. For 75303/75309 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14028 event pairs, 331 based on Foata normal form. 12/2456 useless extension candidates. Maximal degree in co-relation 14843. Up to 1830 conditions per place. [2024-06-03 20:47:26,551 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 181 selfloop transitions, 47 changer transitions 0/235 dead transitions. [2024-06-03 20:47:26,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 235 transitions, 2787 flow [2024-06-03 20:47:26,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:47:26,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:47:26,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-03 20:47:26,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978835978835979 [2024-06-03 20:47:26,552 INFO L175 Difference]: Start difference. First operand has 156 places, 186 transitions, 2054 flow. Second operand 9 states and 226 transitions. [2024-06-03 20:47:26,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 235 transitions, 2787 flow [2024-06-03 20:47:26,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 235 transitions, 2713 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:26,679 INFO L231 Difference]: Finished difference. Result has 161 places, 189 transitions, 2128 flow [2024-06-03 20:47:26,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1980, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2128, PETRI_PLACES=161, PETRI_TRANSITIONS=189} [2024-06-03 20:47:26,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-03 20:47:26,680 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 189 transitions, 2128 flow [2024-06-03 20:47:26,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:26,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:26,681 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 20:47:26,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:47:26,681 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 20:47:26,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:26,681 INFO L85 PathProgramCache]: Analyzing trace with hash -214705298, now seen corresponding path program 3 times [2024-06-03 20:47:26,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:26,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795510585] [2024-06-03 20:47:26,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:26,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:26,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:26,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795510585] [2024-06-03 20:47:26,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795510585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:26,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:26,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:26,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152462230] [2024-06-03 20:47:26,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:26,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:26,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:26,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:26,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:27,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:27,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 189 transitions, 2128 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:27,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:27,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:27,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:27,492 INFO L124 PetriNetUnfolderBase]: 1414/2407 cut-off events. [2024-06-03 20:47:27,492 INFO L125 PetriNetUnfolderBase]: For 75374/75380 co-relation queries the response was YES. [2024-06-03 20:47:27,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14617 conditions, 2407 events. 1414/2407 cut-off events. For 75374/75380 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13731 event pairs, 332 based on Foata normal form. 16/2416 useless extension candidates. Maximal degree in co-relation 14538. Up to 1909 conditions per place. [2024-06-03 20:47:27,510 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 46 changer transitions 0/231 dead transitions. [2024-06-03 20:47:27,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 231 transitions, 2708 flow [2024-06-03 20:47:27,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:47:27,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:47:27,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-03 20:47:27,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846560846560847 [2024-06-03 20:47:27,512 INFO L175 Difference]: Start difference. First operand has 161 places, 189 transitions, 2128 flow. Second operand 9 states and 221 transitions. [2024-06-03 20:47:27,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 231 transitions, 2708 flow [2024-06-03 20:47:27,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 231 transitions, 2630 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:27,619 INFO L231 Difference]: Finished difference. Result has 165 places, 190 transitions, 2171 flow [2024-06-03 20:47:27,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2058, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2171, PETRI_PLACES=165, PETRI_TRANSITIONS=190} [2024-06-03 20:47:27,620 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-03 20:47:27,620 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 190 transitions, 2171 flow [2024-06-03 20:47:27,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:27,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:27,621 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 20:47:27,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:47:27,621 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 20:47:27,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:27,621 INFO L85 PathProgramCache]: Analyzing trace with hash 201918776, now seen corresponding path program 4 times [2024-06-03 20:47:27,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:27,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808389475] [2024-06-03 20:47:27,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:27,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:27,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:27,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808389475] [2024-06-03 20:47:27,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808389475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:27,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:27,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:27,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343461653] [2024-06-03 20:47:27,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:27,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:27,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:27,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:27,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:27,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:27,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 190 transitions, 2171 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:27,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:27,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:27,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:28,260 INFO L124 PetriNetUnfolderBase]: 1472/2494 cut-off events. [2024-06-03 20:47:28,260 INFO L125 PetriNetUnfolderBase]: For 79390/79390 co-relation queries the response was YES. [2024-06-03 20:47:28,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15154 conditions, 2494 events. 1472/2494 cut-off events. For 79390/79390 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14364 event pairs, 347 based on Foata normal form. 16/2502 useless extension candidates. Maximal degree in co-relation 15073. Up to 2007 conditions per place. [2024-06-03 20:47:28,282 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 48 changer transitions 0/233 dead transitions. [2024-06-03 20:47:28,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 233 transitions, 2753 flow [2024-06-03 20:47:28,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:47:28,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:47:28,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-03 20:47:28,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-03 20:47:28,284 INFO L175 Difference]: Start difference. First operand has 165 places, 190 transitions, 2171 flow. Second operand 10 states and 238 transitions. [2024-06-03 20:47:28,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 233 transitions, 2753 flow [2024-06-03 20:47:28,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 233 transitions, 2664 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:28,396 INFO L231 Difference]: Finished difference. Result has 168 places, 191 transitions, 2203 flow [2024-06-03 20:47:28,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2082, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2203, PETRI_PLACES=168, PETRI_TRANSITIONS=191} [2024-06-03 20:47:28,397 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-03 20:47:28,397 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 191 transitions, 2203 flow [2024-06-03 20:47:28,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:28,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:28,398 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 20:47:28,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:47:28,398 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 20:47:28,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:28,398 INFO L85 PathProgramCache]: Analyzing trace with hash 494426656, now seen corresponding path program 5 times [2024-06-03 20:47:28,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:28,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613937743] [2024-06-03 20:47:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:28,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:28,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:28,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613937743] [2024-06-03 20:47:28,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613937743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:28,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:28,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:28,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060307823] [2024-06-03 20:47:28,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:28,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:28,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:28,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:28,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:28,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:28,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 191 transitions, 2203 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:28,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:28,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:28,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:29,081 INFO L124 PetriNetUnfolderBase]: 1530/2602 cut-off events. [2024-06-03 20:47:29,081 INFO L125 PetriNetUnfolderBase]: For 84345/84345 co-relation queries the response was YES. [2024-06-03 20:47:29,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15739 conditions, 2602 events. 1530/2602 cut-off events. For 84345/84345 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 15185 event pairs, 362 based on Foata normal form. 16/2610 useless extension candidates. Maximal degree in co-relation 15657. Up to 2105 conditions per place. [2024-06-03 20:47:29,107 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 177 selfloop transitions, 46 changer transitions 0/230 dead transitions. [2024-06-03 20:47:29,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 230 transitions, 2771 flow [2024-06-03 20:47:29,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:47:29,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:47:29,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-03 20:47:29,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-03 20:47:29,109 INFO L175 Difference]: Start difference. First operand has 168 places, 191 transitions, 2203 flow. Second operand 9 states and 219 transitions. [2024-06-03 20:47:29,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 230 transitions, 2771 flow [2024-06-03 20:47:29,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 230 transitions, 2668 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-03 20:47:29,228 INFO L231 Difference]: Finished difference. Result has 169 places, 192 transitions, 2219 flow [2024-06-03 20:47:29,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2100, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2219, PETRI_PLACES=169, PETRI_TRANSITIONS=192} [2024-06-03 20:47:29,228 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-03 20:47:29,228 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 192 transitions, 2219 flow [2024-06-03 20:47:29,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:29,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:29,229 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 20:47:29,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:47:29,229 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 20:47:29,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:29,229 INFO L85 PathProgramCache]: Analyzing trace with hash 488359632, now seen corresponding path program 6 times [2024-06-03 20:47:29,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:29,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903290640] [2024-06-03 20:47:29,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:29,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:29,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:29,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903290640] [2024-06-03 20:47:29,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903290640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:29,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:29,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:29,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989224451] [2024-06-03 20:47:29,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:29,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:29,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:29,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:29,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:29,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:29,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 192 transitions, 2219 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:29,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:29,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:29,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:29,972 INFO L124 PetriNetUnfolderBase]: 1546/2634 cut-off events. [2024-06-03 20:47:29,972 INFO L125 PetriNetUnfolderBase]: For 84985/84985 co-relation queries the response was YES. [2024-06-03 20:47:29,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15805 conditions, 2634 events. 1546/2634 cut-off events. For 84985/84985 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15460 event pairs, 353 based on Foata normal form. 12/2638 useless extension candidates. Maximal degree in co-relation 15722. Up to 1958 conditions per place. [2024-06-03 20:47:29,991 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 180 selfloop transitions, 49 changer transitions 0/236 dead transitions. [2024-06-03 20:47:29,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 236 transitions, 2837 flow [2024-06-03 20:47:29,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:47:29,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:47:29,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-03 20:47:29,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846560846560847 [2024-06-03 20:47:29,999 INFO L175 Difference]: Start difference. First operand has 169 places, 192 transitions, 2219 flow. Second operand 9 states and 221 transitions. [2024-06-03 20:47:29,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 236 transitions, 2837 flow [2024-06-03 20:47:30,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 236 transitions, 2736 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:30,126 INFO L231 Difference]: Finished difference. Result has 172 places, 195 transitions, 2279 flow [2024-06-03 20:47:30,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2118, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2279, PETRI_PLACES=172, PETRI_TRANSITIONS=195} [2024-06-03 20:47:30,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-03 20:47:30,128 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 195 transitions, 2279 flow [2024-06-03 20:47:30,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:30,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:30,129 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 20:47:30,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:47:30,129 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:30,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:30,130 INFO L85 PathProgramCache]: Analyzing trace with hash 695433804, now seen corresponding path program 1 times [2024-06-03 20:47:30,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:30,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763710878] [2024-06-03 20:47:30,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:30,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:30,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:30,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:30,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763710878] [2024-06-03 20:47:30,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763710878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:30,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:30,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:30,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129458061] [2024-06-03 20:47:30,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:30,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:30,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:30,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:30,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:30,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:30,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 195 transitions, 2279 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:30,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:30,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:30,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:30,883 INFO L124 PetriNetUnfolderBase]: 1587/2715 cut-off events. [2024-06-03 20:47:30,884 INFO L125 PetriNetUnfolderBase]: For 89955/89955 co-relation queries the response was YES. [2024-06-03 20:47:30,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16256 conditions, 2715 events. 1587/2715 cut-off events. For 89955/89955 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 16173 event pairs, 329 based on Foata normal form. 12/2719 useless extension candidates. Maximal degree in co-relation 16171. Up to 1919 conditions per place. [2024-06-03 20:47:30,907 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 180 selfloop transitions, 54 changer transitions 0/241 dead transitions. [2024-06-03 20:47:30,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 241 transitions, 2893 flow [2024-06-03 20:47:30,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:47:30,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:47:30,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-03 20:47:30,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738095238095238 [2024-06-03 20:47:30,909 INFO L175 Difference]: Start difference. First operand has 172 places, 195 transitions, 2279 flow. Second operand 10 states and 241 transitions. [2024-06-03 20:47:30,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 241 transitions, 2893 flow [2024-06-03 20:47:31,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 241 transitions, 2815 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:31,053 INFO L231 Difference]: Finished difference. Result has 177 places, 196 transitions, 2339 flow [2024-06-03 20:47:31,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2201, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2339, PETRI_PLACES=177, PETRI_TRANSITIONS=196} [2024-06-03 20:47:31,054 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-03 20:47:31,054 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 196 transitions, 2339 flow [2024-06-03 20:47:31,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:31,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:31,054 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 20:47:31,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:47:31,054 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:31,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:31,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1006932276, now seen corresponding path program 7 times [2024-06-03 20:47:31,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:31,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187687829] [2024-06-03 20:47:31,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:31,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:31,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:31,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187687829] [2024-06-03 20:47:31,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187687829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:31,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:31,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:31,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389617598] [2024-06-03 20:47:31,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:31,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:31,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:31,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:31,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:31,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:31,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 196 transitions, 2339 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:31,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:31,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:31,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:31,773 INFO L124 PetriNetUnfolderBase]: 1628/2797 cut-off events. [2024-06-03 20:47:31,773 INFO L125 PetriNetUnfolderBase]: For 94658/94664 co-relation queries the response was YES. [2024-06-03 20:47:31,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16850 conditions, 2797 events. 1628/2797 cut-off events. For 94658/94664 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 16741 event pairs, 297 based on Foata normal form. 12/2802 useless extension candidates. Maximal degree in co-relation 16763. Up to 2106 conditions per place. [2024-06-03 20:47:31,799 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 185 selfloop transitions, 48 changer transitions 0/240 dead transitions. [2024-06-03 20:47:31,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 240 transitions, 3081 flow [2024-06-03 20:47:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-03 20:47:31,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-03 20:47:31,800 INFO L175 Difference]: Start difference. First operand has 177 places, 196 transitions, 2339 flow. Second operand 8 states and 205 transitions. [2024-06-03 20:47:31,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 240 transitions, 3081 flow [2024-06-03 20:47:31,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 240 transitions, 2957 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-03 20:47:31,971 INFO L231 Difference]: Finished difference. Result has 178 places, 198 transitions, 2353 flow [2024-06-03 20:47:31,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2215, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2353, PETRI_PLACES=178, PETRI_TRANSITIONS=198} [2024-06-03 20:47:31,972 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-03 20:47:31,972 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 198 transitions, 2353 flow [2024-06-03 20:47:31,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:31,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:31,972 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 20:47:31,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:47:31,972 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:31,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:31,973 INFO L85 PathProgramCache]: Analyzing trace with hash -77741648, now seen corresponding path program 8 times [2024-06-03 20:47:31,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:31,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326841469] [2024-06-03 20:47:31,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:31,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:32,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:32,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326841469] [2024-06-03 20:47:32,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326841469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:32,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:32,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:32,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671805185] [2024-06-03 20:47:32,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:32,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:32,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:32,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:32,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:32,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:32,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 198 transitions, 2353 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:32,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:32,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:32,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:32,644 INFO L124 PetriNetUnfolderBase]: 1686/2895 cut-off events. [2024-06-03 20:47:32,644 INFO L125 PetriNetUnfolderBase]: For 101908/101914 co-relation queries the response was YES. [2024-06-03 20:47:32,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17333 conditions, 2895 events. 1686/2895 cut-off events. For 101908/101914 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 17453 event pairs, 402 based on Foata normal form. 16/2904 useless extension candidates. Maximal degree in co-relation 17244. Up to 2377 conditions per place. [2024-06-03 20:47:32,669 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 46 changer transitions 0/236 dead transitions. [2024-06-03 20:47:32,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 236 transitions, 2935 flow [2024-06-03 20:47:32,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:32,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:32,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-03 20:47:32,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-03 20:47:32,670 INFO L175 Difference]: Start difference. First operand has 178 places, 198 transitions, 2353 flow. Second operand 8 states and 200 transitions. [2024-06-03 20:47:32,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 236 transitions, 2935 flow [2024-06-03 20:47:32,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 236 transitions, 2785 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:32,912 INFO L231 Difference]: Finished difference. Result has 179 places, 199 transitions, 2326 flow [2024-06-03 20:47:32,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2207, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2326, PETRI_PLACES=179, PETRI_TRANSITIONS=199} [2024-06-03 20:47:32,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-03 20:47:32,913 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 199 transitions, 2326 flow [2024-06-03 20:47:32,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:32,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:32,913 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 20:47:32,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:47:32,913 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:32,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:32,914 INFO L85 PathProgramCache]: Analyzing trace with hash -398182934, now seen corresponding path program 9 times [2024-06-03 20:47:32,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:32,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563382636] [2024-06-03 20:47:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:32,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:33,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:33,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563382636] [2024-06-03 20:47:33,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563382636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:33,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:33,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:33,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333638266] [2024-06-03 20:47:33,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:33,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:33,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:33,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:33,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:33,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:33,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 199 transitions, 2326 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:33,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:33,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:33,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:33,639 INFO L124 PetriNetUnfolderBase]: 1744/2993 cut-off events. [2024-06-03 20:47:33,640 INFO L125 PetriNetUnfolderBase]: For 106541/106547 co-relation queries the response was YES. [2024-06-03 20:47:33,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17587 conditions, 2993 events. 1744/2993 cut-off events. For 106541/106547 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 18201 event pairs, 412 based on Foata normal form. 16/3002 useless extension candidates. Maximal degree in co-relation 17498. Up to 2475 conditions per place. [2024-06-03 20:47:33,668 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 191 selfloop transitions, 47 changer transitions 0/245 dead transitions. [2024-06-03 20:47:33,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 245 transitions, 2944 flow [2024-06-03 20:47:33,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:47:33,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:47:33,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-03 20:47:33,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2024-06-03 20:47:33,669 INFO L175 Difference]: Start difference. First operand has 179 places, 199 transitions, 2326 flow. Second operand 10 states and 242 transitions. [2024-06-03 20:47:33,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 245 transitions, 2944 flow [2024-06-03 20:47:33,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 245 transitions, 2847 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:33,901 INFO L231 Difference]: Finished difference. Result has 183 places, 200 transitions, 2352 flow [2024-06-03 20:47:33,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2352, PETRI_PLACES=183, PETRI_TRANSITIONS=200} [2024-06-03 20:47:33,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-03 20:47:33,902 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 200 transitions, 2352 flow [2024-06-03 20:47:33,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:33,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:33,902 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 20:47:33,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:47:33,902 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:33,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:33,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1285671304, now seen corresponding path program 10 times [2024-06-03 20:47:33,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:33,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259579213] [2024-06-03 20:47:33,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:33,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:34,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:34,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259579213] [2024-06-03 20:47:34,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259579213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:34,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:34,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:34,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608685644] [2024-06-03 20:47:34,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:34,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:34,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:34,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:34,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:34,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:34,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 200 transitions, 2352 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:34,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:34,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:34,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:34,622 INFO L124 PetriNetUnfolderBase]: 1716/2945 cut-off events. [2024-06-03 20:47:34,622 INFO L125 PetriNetUnfolderBase]: For 101082/101088 co-relation queries the response was YES. [2024-06-03 20:47:34,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16917 conditions, 2945 events. 1716/2945 cut-off events. For 101082/101088 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17918 event pairs, 399 based on Foata normal form. 20/2957 useless extension candidates. Maximal degree in co-relation 16827. Up to 2431 conditions per place. [2024-06-03 20:47:34,649 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 186 selfloop transitions, 46 changer transitions 0/239 dead transitions. [2024-06-03 20:47:34,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 239 transitions, 2942 flow [2024-06-03 20:47:34,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:47:34,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:47:34,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-03 20:47:34,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2024-06-03 20:47:34,651 INFO L175 Difference]: Start difference. First operand has 183 places, 200 transitions, 2352 flow. Second operand 9 states and 214 transitions. [2024-06-03 20:47:34,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 239 transitions, 2942 flow [2024-06-03 20:47:34,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 239 transitions, 2825 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-03 20:47:34,819 INFO L231 Difference]: Finished difference. Result has 184 places, 201 transitions, 2358 flow [2024-06-03 20:47:34,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2243, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2358, PETRI_PLACES=184, PETRI_TRANSITIONS=201} [2024-06-03 20:47:34,820 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-03 20:47:34,820 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 201 transitions, 2358 flow [2024-06-03 20:47:34,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:34,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:34,820 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 20:47:34,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:47:34,820 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:34,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:34,821 INFO L85 PathProgramCache]: Analyzing trace with hash -390558422, now seen corresponding path program 2 times [2024-06-03 20:47:34,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:34,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444858977] [2024-06-03 20:47:34,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:34,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:35,026 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 20:47:35,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:35,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444858977] [2024-06-03 20:47:35,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444858977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:35,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:35,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:35,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663469954] [2024-06-03 20:47:35,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:35,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:35,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:35,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:35,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:35,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:35,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 201 transitions, 2358 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:35,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:35,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:35,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:35,527 INFO L124 PetriNetUnfolderBase]: 1757/3030 cut-off events. [2024-06-03 20:47:35,527 INFO L125 PetriNetUnfolderBase]: For 101806/101812 co-relation queries the response was YES. [2024-06-03 20:47:35,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17191 conditions, 3030 events. 1757/3030 cut-off events. For 101806/101812 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 18602 event pairs, 396 based on Foata normal form. 12/3035 useless extension candidates. Maximal degree in co-relation 17100. Up to 2323 conditions per place. [2024-06-03 20:47:35,603 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 192 selfloop transitions, 51 changer transitions 0/250 dead transitions. [2024-06-03 20:47:35,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 250 transitions, 3000 flow [2024-06-03 20:47:35,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:47:35,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:47:35,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-03 20:47:35,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-06-03 20:47:35,605 INFO L175 Difference]: Start difference. First operand has 184 places, 201 transitions, 2358 flow. Second operand 10 states and 244 transitions. [2024-06-03 20:47:35,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 250 transitions, 3000 flow [2024-06-03 20:47:35,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 250 transitions, 2915 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:35,839 INFO L231 Difference]: Finished difference. Result has 188 places, 202 transitions, 2407 flow [2024-06-03 20:47:35,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2273, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2407, PETRI_PLACES=188, PETRI_TRANSITIONS=202} [2024-06-03 20:47:35,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-03 20:47:35,840 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 202 transitions, 2407 flow [2024-06-03 20:47:35,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:35,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:35,841 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 20:47:35,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:47:35,841 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:35,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:35,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1293295816, now seen corresponding path program 3 times [2024-06-03 20:47:35,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:35,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854890605] [2024-06-03 20:47:35,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:35,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:36,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:36,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854890605] [2024-06-03 20:47:36,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854890605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:36,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:36,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:36,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750056490] [2024-06-03 20:47:36,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:36,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:36,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:36,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:36,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:36,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:36,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 202 transitions, 2407 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:36,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:36,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:36,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:36,709 INFO L124 PetriNetUnfolderBase]: 1798/3102 cut-off events. [2024-06-03 20:47:36,709 INFO L125 PetriNetUnfolderBase]: For 108494/108500 co-relation queries the response was YES. [2024-06-03 20:47:36,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17663 conditions, 3102 events. 1798/3102 cut-off events. For 108494/108500 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19233 event pairs, 414 based on Foata normal form. 16/3110 useless extension candidates. Maximal degree in co-relation 17570. Up to 2486 conditions per place. [2024-06-03 20:47:36,738 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 192 selfloop transitions, 49 changer transitions 0/248 dead transitions. [2024-06-03 20:47:36,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 248 transitions, 3039 flow [2024-06-03 20:47:36,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:47:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:47:36,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-03 20:47:36,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-03 20:47:36,741 INFO L175 Difference]: Start difference. First operand has 188 places, 202 transitions, 2407 flow. Second operand 10 states and 237 transitions. [2024-06-03 20:47:36,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 248 transitions, 3039 flow [2024-06-03 20:47:36,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 248 transitions, 2919 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-03 20:47:36,940 INFO L231 Difference]: Finished difference. Result has 190 places, 203 transitions, 2419 flow [2024-06-03 20:47:36,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2287, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2419, PETRI_PLACES=190, PETRI_TRANSITIONS=203} [2024-06-03 20:47:36,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-03 20:47:36,941 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 203 transitions, 2419 flow [2024-06-03 20:47:36,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:36,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:36,941 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 20:47:36,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:47:36,942 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:36,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:36,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1855156424, now seen corresponding path program 4 times [2024-06-03 20:47:36,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:36,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863266371] [2024-06-03 20:47:36,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:36,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:37,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:37,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:37,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863266371] [2024-06-03 20:47:37,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863266371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:37,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:37,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:37,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732739336] [2024-06-03 20:47:37,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:37,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:37,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:37,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:37,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:37,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:37,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 203 transitions, 2419 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:37,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:37,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:37,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:37,702 INFO L124 PetriNetUnfolderBase]: 1778/3080 cut-off events. [2024-06-03 20:47:37,702 INFO L125 PetriNetUnfolderBase]: For 102677/102683 co-relation queries the response was YES. [2024-06-03 20:47:37,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17049 conditions, 3080 events. 1778/3080 cut-off events. For 102677/102683 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 19106 event pairs, 359 based on Foata normal form. 16/3088 useless extension candidates. Maximal degree in co-relation 16955. Up to 1710 conditions per place. [2024-06-03 20:47:37,730 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 177 selfloop transitions, 60 changer transitions 0/244 dead transitions. [2024-06-03 20:47:37,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 244 transitions, 2935 flow [2024-06-03 20:47:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:47:37,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:47:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-03 20:47:37,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:47:37,732 INFO L175 Difference]: Start difference. First operand has 190 places, 203 transitions, 2419 flow. Second operand 9 states and 216 transitions. [2024-06-03 20:47:37,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 244 transitions, 2935 flow [2024-06-03 20:47:37,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 244 transitions, 2799 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-03 20:47:37,992 INFO L231 Difference]: Finished difference. Result has 189 places, 202 transitions, 2333 flow [2024-06-03 20:47:37,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2209, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2333, PETRI_PLACES=189, PETRI_TRANSITIONS=202} [2024-06-03 20:47:37,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-03 20:47:37,993 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 202 transitions, 2333 flow [2024-06-03 20:47:37,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:37,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:37,993 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 20:47:37,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:47:37,993 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 20:47:37,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:37,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1247397911, now seen corresponding path program 1 times [2024-06-03 20:47:37,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:37,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117825684] [2024-06-03 20:47:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:37,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:38,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:38,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117825684] [2024-06-03 20:47:38,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117825684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:38,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:38,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:38,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579809889] [2024-06-03 20:47:38,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:38,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:38,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:38,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:38,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:38,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:38,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 202 transitions, 2333 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:38,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:38,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:38,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:38,644 INFO L124 PetriNetUnfolderBase]: 1796/3079 cut-off events. [2024-06-03 20:47:38,645 INFO L125 PetriNetUnfolderBase]: For 94817/94817 co-relation queries the response was YES. [2024-06-03 20:47:38,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17186 conditions, 3079 events. 1796/3079 cut-off events. For 94817/94817 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 19021 event pairs, 430 based on Foata normal form. 2/3073 useless extension candidates. Maximal degree in co-relation 17092. Up to 2581 conditions per place. [2024-06-03 20:47:38,673 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 147 selfloop transitions, 79 changer transitions 0/233 dead transitions. [2024-06-03 20:47:38,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 233 transitions, 3215 flow [2024-06-03 20:47:38,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:38,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:38,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:47:38,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-03 20:47:38,675 INFO L175 Difference]: Start difference. First operand has 189 places, 202 transitions, 2333 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:47:38,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 233 transitions, 3215 flow [2024-06-03 20:47:38,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 233 transitions, 3006 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-03 20:47:38,866 INFO L231 Difference]: Finished difference. Result has 187 places, 213 transitions, 2421 flow [2024-06-03 20:47:38,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2124, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2421, PETRI_PLACES=187, PETRI_TRANSITIONS=213} [2024-06-03 20:47:38,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-03 20:47:38,867 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 213 transitions, 2421 flow [2024-06-03 20:47:38,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:38,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:38,867 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 20:47:38,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:47:38,867 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 20:47:38,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:38,868 INFO L85 PathProgramCache]: Analyzing trace with hash 418301511, now seen corresponding path program 2 times [2024-06-03 20:47:38,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:38,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141325659] [2024-06-03 20:47:38,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:38,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:39,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:39,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141325659] [2024-06-03 20:47:39,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141325659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:39,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:39,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:39,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472096313] [2024-06-03 20:47:39,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:39,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:39,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:39,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:39,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:39,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:39,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 213 transitions, 2421 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:39,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:39,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:39,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:39,552 INFO L124 PetriNetUnfolderBase]: 1822/3126 cut-off events. [2024-06-03 20:47:39,552 INFO L125 PetriNetUnfolderBase]: For 100153/100153 co-relation queries the response was YES. [2024-06-03 20:47:39,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17284 conditions, 3126 events. 1822/3126 cut-off events. For 100153/100153 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 19329 event pairs, 419 based on Foata normal form. 2/3121 useless extension candidates. Maximal degree in co-relation 17191. Up to 2724 conditions per place. [2024-06-03 20:47:39,578 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 165 selfloop transitions, 66 changer transitions 0/238 dead transitions. [2024-06-03 20:47:39,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 238 transitions, 3295 flow [2024-06-03 20:47:39,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:39,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:39,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-03 20:47:39,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-03 20:47:39,580 INFO L175 Difference]: Start difference. First operand has 187 places, 213 transitions, 2421 flow. Second operand 7 states and 167 transitions. [2024-06-03 20:47:39,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 238 transitions, 3295 flow [2024-06-03 20:47:39,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 238 transitions, 3158 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:39,833 INFO L231 Difference]: Finished difference. Result has 191 places, 221 transitions, 2539 flow [2024-06-03 20:47:39,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2300, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2539, PETRI_PLACES=191, PETRI_TRANSITIONS=221} [2024-06-03 20:47:39,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-03 20:47:39,834 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 221 transitions, 2539 flow [2024-06-03 20:47:39,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:39,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:39,835 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 20:47:39,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:47:39,835 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 20:47:39,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:39,835 INFO L85 PathProgramCache]: Analyzing trace with hash 418307091, now seen corresponding path program 3 times [2024-06-03 20:47:39,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:39,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756239950] [2024-06-03 20:47:39,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:39,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:40,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:40,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756239950] [2024-06-03 20:47:40,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756239950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:40,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:40,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:40,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302611099] [2024-06-03 20:47:40,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:40,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:40,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:40,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:40,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:40,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:40,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 221 transitions, 2539 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:40,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:40,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:40,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:40,485 INFO L124 PetriNetUnfolderBase]: 1816/3118 cut-off events. [2024-06-03 20:47:40,486 INFO L125 PetriNetUnfolderBase]: For 102514/102514 co-relation queries the response was YES. [2024-06-03 20:47:40,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17243 conditions, 3118 events. 1816/3118 cut-off events. For 102514/102514 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 19310 event pairs, 419 based on Foata normal form. 2/3113 useless extension candidates. Maximal degree in co-relation 17148. Up to 2718 conditions per place. [2024-06-03 20:47:40,511 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 165 selfloop transitions, 67 changer transitions 0/239 dead transitions. [2024-06-03 20:47:40,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 239 transitions, 3225 flow [2024-06-03 20:47:40,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:47:40,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:47:40,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-03 20:47:40,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-06-03 20:47:40,524 INFO L175 Difference]: Start difference. First operand has 191 places, 221 transitions, 2539 flow. Second operand 9 states and 202 transitions. [2024-06-03 20:47:40,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 239 transitions, 3225 flow [2024-06-03 20:47:40,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 239 transitions, 3101 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:40,681 INFO L231 Difference]: Finished difference. Result has 197 places, 221 transitions, 2556 flow [2024-06-03 20:47:40,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2415, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2556, PETRI_PLACES=197, PETRI_TRANSITIONS=221} [2024-06-03 20:47:40,681 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-03 20:47:40,682 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 221 transitions, 2556 flow [2024-06-03 20:47:40,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:40,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:40,682 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 20:47:40,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:47:40,682 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 20:47:40,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:40,683 INFO L85 PathProgramCache]: Analyzing trace with hash 568817961, now seen corresponding path program 4 times [2024-06-03 20:47:40,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:40,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211071733] [2024-06-03 20:47:40,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:40,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:40,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:40,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211071733] [2024-06-03 20:47:40,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211071733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:40,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:40,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:40,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743735323] [2024-06-03 20:47:40,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:40,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:40,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:40,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:40,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:40,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:40,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 221 transitions, 2556 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:40,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:40,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:40,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:41,451 INFO L124 PetriNetUnfolderBase]: 1834/3149 cut-off events. [2024-06-03 20:47:41,452 INFO L125 PetriNetUnfolderBase]: For 107719/107719 co-relation queries the response was YES. [2024-06-03 20:47:41,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17665 conditions, 3149 events. 1834/3149 cut-off events. For 107719/107719 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 19543 event pairs, 419 based on Foata normal form. 2/3144 useless extension candidates. Maximal degree in co-relation 17568. Up to 2647 conditions per place. [2024-06-03 20:47:41,478 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 153 selfloop transitions, 92 changer transitions 0/252 dead transitions. [2024-06-03 20:47:41,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 252 transitions, 3564 flow [2024-06-03 20:47:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:41,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:41,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-03 20:47:41,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-03 20:47:41,479 INFO L175 Difference]: Start difference. First operand has 197 places, 221 transitions, 2556 flow. Second operand 7 states and 175 transitions. [2024-06-03 20:47:41,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 252 transitions, 3564 flow [2024-06-03 20:47:41,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 252 transitions, 3419 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 20:47:41,772 INFO L231 Difference]: Finished difference. Result has 197 places, 228 transitions, 2730 flow [2024-06-03 20:47:41,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2411, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2730, PETRI_PLACES=197, PETRI_TRANSITIONS=228} [2024-06-03 20:47:41,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-03 20:47:41,773 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 228 transitions, 2730 flow [2024-06-03 20:47:41,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:41,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:41,773 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 20:47:41,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:47:41,774 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 20:47:41,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:41,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1760165631, now seen corresponding path program 5 times [2024-06-03 20:47:41,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:41,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014393889] [2024-06-03 20:47:41,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:41,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:41,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:41,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014393889] [2024-06-03 20:47:41,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014393889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:41,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:41,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:41,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936840533] [2024-06-03 20:47:41,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:41,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:41,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:41,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:41,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:42,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:42,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 228 transitions, 2730 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:42,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:42,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:42,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:42,457 INFO L124 PetriNetUnfolderBase]: 1844/3167 cut-off events. [2024-06-03 20:47:42,458 INFO L125 PetriNetUnfolderBase]: For 112555/112555 co-relation queries the response was YES. [2024-06-03 20:47:42,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18018 conditions, 3167 events. 1844/3167 cut-off events. For 112555/112555 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 19677 event pairs, 419 based on Foata normal form. 2/3162 useless extension candidates. Maximal degree in co-relation 17919. Up to 2657 conditions per place. [2024-06-03 20:47:42,488 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 153 selfloop transitions, 98 changer transitions 0/258 dead transitions. [2024-06-03 20:47:42,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 258 transitions, 3733 flow [2024-06-03 20:47:42,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:47:42,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:47:42,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-03 20:47:42,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-03 20:47:42,489 INFO L175 Difference]: Start difference. First operand has 197 places, 228 transitions, 2730 flow. Second operand 9 states and 213 transitions. [2024-06-03 20:47:42,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 258 transitions, 3733 flow [2024-06-03 20:47:42,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 258 transitions, 3520 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:42,838 INFO L231 Difference]: Finished difference. Result has 201 places, 232 transitions, 2796 flow [2024-06-03 20:47:42,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2532, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2796, PETRI_PLACES=201, PETRI_TRANSITIONS=232} [2024-06-03 20:47:42,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-03 20:47:42,839 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 232 transitions, 2796 flow [2024-06-03 20:47:42,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:42,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:42,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:42,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:47:42,840 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 20:47:42,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:42,840 INFO L85 PathProgramCache]: Analyzing trace with hash 576175191, now seen corresponding path program 6 times [2024-06-03 20:47:42,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:42,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521709454] [2024-06-03 20:47:42,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:42,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:43,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:43,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521709454] [2024-06-03 20:47:43,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521709454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:43,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:43,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:43,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152607355] [2024-06-03 20:47:43,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:43,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:43,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:43,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:43,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:43,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:43,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 232 transitions, 2796 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:43,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:43,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:43,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:43,630 INFO L124 PetriNetUnfolderBase]: 1877/3233 cut-off events. [2024-06-03 20:47:43,631 INFO L125 PetriNetUnfolderBase]: For 113200/113200 co-relation queries the response was YES. [2024-06-03 20:47:43,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18501 conditions, 3233 events. 1877/3233 cut-off events. For 113200/113200 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20174 event pairs, 398 based on Foata normal form. 2/3232 useless extension candidates. Maximal degree in co-relation 18402. Up to 2813 conditions per place. [2024-06-03 20:47:43,663 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 213 selfloop transitions, 53 changer transitions 0/273 dead transitions. [2024-06-03 20:47:43,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 273 transitions, 3781 flow [2024-06-03 20:47:43,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:43,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-03 20:47:43,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-03 20:47:43,664 INFO L175 Difference]: Start difference. First operand has 201 places, 232 transitions, 2796 flow. Second operand 6 states and 156 transitions. [2024-06-03 20:47:43,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 273 transitions, 3781 flow [2024-06-03 20:47:43,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 273 transitions, 3514 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-03 20:47:43,992 INFO L231 Difference]: Finished difference. Result has 201 places, 249 transitions, 3016 flow [2024-06-03 20:47:43,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3016, PETRI_PLACES=201, PETRI_TRANSITIONS=249} [2024-06-03 20:47:43,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-03 20:47:43,992 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 249 transitions, 3016 flow [2024-06-03 20:47:43,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:43,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:43,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:43,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:47:43,993 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 20:47:43,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:43,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1474843863, now seen corresponding path program 1 times [2024-06-03 20:47:43,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:43,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843343962] [2024-06-03 20:47:43,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:43,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:44,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:44,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843343962] [2024-06-03 20:47:44,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843343962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:44,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:44,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:44,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178907098] [2024-06-03 20:47:44,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:44,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:44,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:44,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:44,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:44,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:44,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 249 transitions, 3016 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:44,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:44,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:44,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:44,864 INFO L124 PetriNetUnfolderBase]: 1905/3285 cut-off events. [2024-06-03 20:47:44,864 INFO L125 PetriNetUnfolderBase]: For 115917/115923 co-relation queries the response was YES. [2024-06-03 20:47:44,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18765 conditions, 3285 events. 1905/3285 cut-off events. For 115917/115923 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 20670 event pairs, 415 based on Foata normal form. 6/3286 useless extension candidates. Maximal degree in co-relation 18664. Up to 2729 conditions per place. [2024-06-03 20:47:44,897 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 202 selfloop transitions, 86 changer transitions 0/295 dead transitions. [2024-06-03 20:47:44,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 295 transitions, 4187 flow [2024-06-03 20:47:44,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:44,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:44,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-03 20:47:44,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-03 20:47:44,898 INFO L175 Difference]: Start difference. First operand has 201 places, 249 transitions, 3016 flow. Second operand 8 states and 200 transitions. [2024-06-03 20:47:44,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 295 transitions, 4187 flow [2024-06-03 20:47:45,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 295 transitions, 4081 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:45,231 INFO L231 Difference]: Finished difference. Result has 207 places, 264 transitions, 3247 flow [2024-06-03 20:47:45,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3247, PETRI_PLACES=207, PETRI_TRANSITIONS=264} [2024-06-03 20:47:45,231 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-03 20:47:45,232 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 264 transitions, 3247 flow [2024-06-03 20:47:45,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:45,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:45,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:45,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:47:45,233 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 20:47:45,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:45,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1149716793, now seen corresponding path program 2 times [2024-06-03 20:47:45,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:45,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156517404] [2024-06-03 20:47:45,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:45,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:45,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:45,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156517404] [2024-06-03 20:47:45,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156517404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:45,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:45,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:45,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536368321] [2024-06-03 20:47:45,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:45,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:45,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:45,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:45,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:45,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:45,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 264 transitions, 3247 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:45,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:45,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:45,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:46,002 INFO L124 PetriNetUnfolderBase]: 1941/3347 cut-off events. [2024-06-03 20:47:46,002 INFO L125 PetriNetUnfolderBase]: For 123916/123922 co-relation queries the response was YES. [2024-06-03 20:47:46,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19646 conditions, 3347 events. 1941/3347 cut-off events. For 123916/123922 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 21128 event pairs, 415 based on Foata normal form. 6/3348 useless extension candidates. Maximal degree in co-relation 19543. Up to 2760 conditions per place. [2024-06-03 20:47:46,036 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 204 selfloop transitions, 100 changer transitions 0/311 dead transitions. [2024-06-03 20:47:46,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 311 transitions, 4558 flow [2024-06-03 20:47:46,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:47:46,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:47:46,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 258 transitions. [2024-06-03 20:47:46,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-03 20:47:46,037 INFO L175 Difference]: Start difference. First operand has 207 places, 264 transitions, 3247 flow. Second operand 11 states and 258 transitions. [2024-06-03 20:47:46,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 311 transitions, 4558 flow [2024-06-03 20:47:46,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 311 transitions, 4409 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-03 20:47:46,411 INFO L231 Difference]: Finished difference. Result has 217 places, 276 transitions, 3456 flow [2024-06-03 20:47:46,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3118, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3456, PETRI_PLACES=217, PETRI_TRANSITIONS=276} [2024-06-03 20:47:46,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-03 20:47:46,412 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 276 transitions, 3456 flow [2024-06-03 20:47:46,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:46,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:46,412 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 20:47:46,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:47:46,413 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 20:47:46,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:46,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1150102743, now seen corresponding path program 3 times [2024-06-03 20:47:46,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:46,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555291454] [2024-06-03 20:47:46,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:46,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:46,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:46,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555291454] [2024-06-03 20:47:46,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555291454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:46,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:46,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:46,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003717489] [2024-06-03 20:47:46,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:46,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:46,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:46,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:46,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:46,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:46,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 276 transitions, 3456 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:46,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:46,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:46,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:47,213 INFO L124 PetriNetUnfolderBase]: 1935/3339 cut-off events. [2024-06-03 20:47:47,213 INFO L125 PetriNetUnfolderBase]: For 126102/126108 co-relation queries the response was YES. [2024-06-03 20:47:47,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19829 conditions, 3339 events. 1935/3339 cut-off events. For 126102/126108 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 21081 event pairs, 415 based on Foata normal form. 6/3340 useless extension candidates. Maximal degree in co-relation 19723. Up to 2755 conditions per place. [2024-06-03 20:47:47,251 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 204 selfloop transitions, 98 changer transitions 0/309 dead transitions. [2024-06-03 20:47:47,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 309 transitions, 4532 flow [2024-06-03 20:47:47,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:47:47,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:47:47,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-03 20:47:47,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738095238095238 [2024-06-03 20:47:47,252 INFO L175 Difference]: Start difference. First operand has 217 places, 276 transitions, 3456 flow. Second operand 10 states and 241 transitions. [2024-06-03 20:47:47,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 309 transitions, 4532 flow [2024-06-03 20:47:47,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 309 transitions, 4318 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:47,583 INFO L231 Difference]: Finished difference. Result has 221 places, 276 transitions, 3445 flow [2024-06-03 20:47:47,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3242, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3445, PETRI_PLACES=221, PETRI_TRANSITIONS=276} [2024-06-03 20:47:47,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-03 20:47:47,584 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 276 transitions, 3445 flow [2024-06-03 20:47:47,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:47,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:47,584 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 20:47:47,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:47:47,584 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 20:47:47,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:47,585 INFO L85 PathProgramCache]: Analyzing trace with hash 105029785, now seen corresponding path program 1 times [2024-06-03 20:47:47,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:47,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798466173] [2024-06-03 20:47:47,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:47,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:47,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:47,808 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 20:47:47,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:47,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798466173] [2024-06-03 20:47:47,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798466173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:47,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:47,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:47,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731670606] [2024-06-03 20:47:47,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:47,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:47,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:47,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:47,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:47,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:47,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 276 transitions, 3445 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:47,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:47,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:47,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:48,330 INFO L124 PetriNetUnfolderBase]: 1940/3345 cut-off events. [2024-06-03 20:47:48,330 INFO L125 PetriNetUnfolderBase]: For 129488/129494 co-relation queries the response was YES. [2024-06-03 20:47:48,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19975 conditions, 3345 events. 1940/3345 cut-off events. For 129488/129494 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 21121 event pairs, 416 based on Foata normal form. 5/3345 useless extension candidates. Maximal degree in co-relation 19868. Up to 2902 conditions per place. [2024-06-03 20:47:48,365 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 230 selfloop transitions, 61 changer transitions 0/298 dead transitions. [2024-06-03 20:47:48,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 298 transitions, 4333 flow [2024-06-03 20:47:48,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:48,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:48,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 20:47:48,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-03 20:47:48,366 INFO L175 Difference]: Start difference. First operand has 221 places, 276 transitions, 3445 flow. Second operand 7 states and 166 transitions. [2024-06-03 20:47:48,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 298 transitions, 4333 flow [2024-06-03 20:47:48,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 298 transitions, 4099 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-03 20:47:48,752 INFO L231 Difference]: Finished difference. Result has 218 places, 279 transitions, 3399 flow [2024-06-03 20:47:48,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3217, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3399, PETRI_PLACES=218, PETRI_TRANSITIONS=279} [2024-06-03 20:47:48,753 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-03 20:47:48,753 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 279 transitions, 3399 flow [2024-06-03 20:47:48,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:48,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:48,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:48,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:47:48,754 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 20:47:48,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:48,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1149702905, now seen corresponding path program 1 times [2024-06-03 20:47:48,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:48,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445518175] [2024-06-03 20:47:48,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:48,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:48,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:48,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445518175] [2024-06-03 20:47:48,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445518175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:48,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:48,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:48,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093057706] [2024-06-03 20:47:48,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:48,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:48,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:48,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:48,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:49,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:49,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 279 transitions, 3399 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:49,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:49,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:49,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:49,479 INFO L124 PetriNetUnfolderBase]: 1956/3369 cut-off events. [2024-06-03 20:47:49,480 INFO L125 PetriNetUnfolderBase]: For 137889/137895 co-relation queries the response was YES. [2024-06-03 20:47:49,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20055 conditions, 3369 events. 1956/3369 cut-off events. For 137889/137895 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 21245 event pairs, 417 based on Foata normal form. 8/3372 useless extension candidates. Maximal degree in co-relation 19948. Up to 2914 conditions per place. [2024-06-03 20:47:49,516 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 231 selfloop transitions, 64 changer transitions 0/302 dead transitions. [2024-06-03 20:47:49,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 302 transitions, 4293 flow [2024-06-03 20:47:49,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:49,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:49,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-03 20:47:49,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-03 20:47:49,518 INFO L175 Difference]: Start difference. First operand has 218 places, 279 transitions, 3399 flow. Second operand 7 states and 167 transitions. [2024-06-03 20:47:49,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 302 transitions, 4293 flow [2024-06-03 20:47:49,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 302 transitions, 4181 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:49,933 INFO L231 Difference]: Finished difference. Result has 221 places, 282 transitions, 3479 flow [2024-06-03 20:47:49,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3287, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3479, PETRI_PLACES=221, PETRI_TRANSITIONS=282} [2024-06-03 20:47:49,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-03 20:47:49,934 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 282 transitions, 3479 flow [2024-06-03 20:47:49,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:49,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:49,934 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 20:47:49,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:47:49,934 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 20:47:49,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:49,935 INFO L85 PathProgramCache]: Analyzing trace with hash 674882755, now seen corresponding path program 4 times [2024-06-03 20:47:49,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:49,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906272370] [2024-06-03 20:47:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:49,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:50,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:50,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906272370] [2024-06-03 20:47:50,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906272370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:50,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:50,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:50,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739581778] [2024-06-03 20:47:50,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:50,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:50,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:50,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:50,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:50,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:50,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 282 transitions, 3479 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:50,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:50,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:50,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:50,734 INFO L124 PetriNetUnfolderBase]: 1974/3398 cut-off events. [2024-06-03 20:47:50,734 INFO L125 PetriNetUnfolderBase]: For 141245/141245 co-relation queries the response was YES. [2024-06-03 20:47:50,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20450 conditions, 3398 events. 1974/3398 cut-off events. For 141245/141245 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 21407 event pairs, 396 based on Foata normal form. 2/3397 useless extension candidates. Maximal degree in co-relation 20341. Up to 2900 conditions per place. [2024-06-03 20:47:50,768 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 238 selfloop transitions, 70 changer transitions 0/315 dead transitions. [2024-06-03 20:47:50,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 315 transitions, 4331 flow [2024-06-03 20:47:50,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:50,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:50,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-03 20:47:50,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-03 20:47:50,769 INFO L175 Difference]: Start difference. First operand has 221 places, 282 transitions, 3479 flow. Second operand 6 states and 159 transitions. [2024-06-03 20:47:50,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 315 transitions, 4331 flow [2024-06-03 20:47:51,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 315 transitions, 4161 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:51,229 INFO L231 Difference]: Finished difference. Result has 223 places, 289 transitions, 3593 flow [2024-06-03 20:47:51,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3309, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3593, PETRI_PLACES=223, PETRI_TRANSITIONS=289} [2024-06-03 20:47:51,230 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-03 20:47:51,230 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 289 transitions, 3593 flow [2024-06-03 20:47:51,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:51,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:51,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:51,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 20:47:51,231 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 20:47:51,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:51,231 INFO L85 PathProgramCache]: Analyzing trace with hash 246786085, now seen corresponding path program 5 times [2024-06-03 20:47:51,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:51,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38474058] [2024-06-03 20:47:51,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:51,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:51,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:51,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:51,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38474058] [2024-06-03 20:47:51,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38474058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:51,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:51,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:51,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543253911] [2024-06-03 20:47:51,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:51,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:51,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:51,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:51,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:51,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:51,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 289 transitions, 3593 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:51,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:51,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:51,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:52,037 INFO L124 PetriNetUnfolderBase]: 1992/3432 cut-off events. [2024-06-03 20:47:52,037 INFO L125 PetriNetUnfolderBase]: For 149183/149189 co-relation queries the response was YES. [2024-06-03 20:47:52,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20844 conditions, 3432 events. 1992/3432 cut-off events. For 149183/149189 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 21699 event pairs, 416 based on Foata normal form. 6/3433 useless extension candidates. Maximal degree in co-relation 20733. Up to 2821 conditions per place. [2024-06-03 20:47:52,078 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 204 selfloop transitions, 118 changer transitions 0/329 dead transitions. [2024-06-03 20:47:52,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 329 transitions, 4927 flow [2024-06-03 20:47:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:47:52,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:47:52,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-03 20:47:52,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582010582010582 [2024-06-03 20:47:52,080 INFO L175 Difference]: Start difference. First operand has 223 places, 289 transitions, 3593 flow. Second operand 9 states and 220 transitions. [2024-06-03 20:47:52,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 329 transitions, 4927 flow [2024-06-03 20:47:52,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 329 transitions, 4835 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:52,481 INFO L231 Difference]: Finished difference. Result has 229 places, 296 transitions, 3829 flow [2024-06-03 20:47:52,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3501, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3829, PETRI_PLACES=229, PETRI_TRANSITIONS=296} [2024-06-03 20:47:52,484 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-03 20:47:52,484 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 296 transitions, 3829 flow [2024-06-03 20:47:52,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:52,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:52,484 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 20:47:52,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 20:47:52,484 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 20:47:52,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:52,485 INFO L85 PathProgramCache]: Analyzing trace with hash 246400135, now seen corresponding path program 6 times [2024-06-03 20:47:52,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:52,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136317575] [2024-06-03 20:47:52,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:52,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:52,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:52,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136317575] [2024-06-03 20:47:52,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136317575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:52,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:52,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:52,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509183157] [2024-06-03 20:47:52,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:52,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:52,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:52,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:52,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:52,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:52,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 296 transitions, 3829 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:52,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:52,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:52,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:53,297 INFO L124 PetriNetUnfolderBase]: 1986/3424 cut-off events. [2024-06-03 20:47:53,297 INFO L125 PetriNetUnfolderBase]: For 152160/152166 co-relation queries the response was YES. [2024-06-03 20:47:53,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20994 conditions, 3424 events. 1986/3424 cut-off events. For 152160/152166 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 21682 event pairs, 416 based on Foata normal form. 6/3425 useless extension candidates. Maximal degree in co-relation 20882. Up to 2816 conditions per place. [2024-06-03 20:47:53,332 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 204 selfloop transitions, 115 changer transitions 0/326 dead transitions. [2024-06-03 20:47:53,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 326 transitions, 4973 flow [2024-06-03 20:47:53,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:53,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-03 20:47:53,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-03 20:47:53,334 INFO L175 Difference]: Start difference. First operand has 229 places, 296 transitions, 3829 flow. Second operand 7 states and 181 transitions. [2024-06-03 20:47:53,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 326 transitions, 4973 flow [2024-06-03 20:47:53,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 326 transitions, 4711 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:53,690 INFO L231 Difference]: Finished difference. Result has 230 places, 296 transitions, 3822 flow [2024-06-03 20:47:53,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3575, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3822, PETRI_PLACES=230, PETRI_TRANSITIONS=296} [2024-06-03 20:47:53,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-03 20:47:53,691 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 296 transitions, 3822 flow [2024-06-03 20:47:53,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:53,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:53,691 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 20:47:53,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 20:47:53,692 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 20:47:53,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:53,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1436780941, now seen corresponding path program 1 times [2024-06-03 20:47:53,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:53,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001148054] [2024-06-03 20:47:53,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:53,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:53,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:53,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001148054] [2024-06-03 20:47:53,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001148054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:53,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:53,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:53,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288372445] [2024-06-03 20:47:53,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:53,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:53,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:53,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:53,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:53,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:53,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 296 transitions, 3822 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:53,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:53,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:53,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:54,397 INFO L124 PetriNetUnfolderBase]: 2007/3454 cut-off events. [2024-06-03 20:47:54,397 INFO L125 PetriNetUnfolderBase]: For 154341/154347 co-relation queries the response was YES. [2024-06-03 20:47:54,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21317 conditions, 3454 events. 2007/3454 cut-off events. For 154341/154347 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21857 event pairs, 423 based on Foata normal form. 1/3448 useless extension candidates. Maximal degree in co-relation 21205. Up to 2969 conditions per place. [2024-06-03 20:47:54,433 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 251 selfloop transitions, 68 changer transitions 0/326 dead transitions. [2024-06-03 20:47:54,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 326 transitions, 4878 flow [2024-06-03 20:47:54,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:54,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:54,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-03 20:47:54,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-03 20:47:54,435 INFO L175 Difference]: Start difference. First operand has 230 places, 296 transitions, 3822 flow. Second operand 6 states and 150 transitions. [2024-06-03 20:47:54,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 326 transitions, 4878 flow [2024-06-03 20:47:54,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 326 transitions, 4626 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 20:47:54,790 INFO L231 Difference]: Finished difference. Result has 228 places, 305 transitions, 3870 flow [2024-06-03 20:47:54,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3578, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3870, PETRI_PLACES=228, PETRI_TRANSITIONS=305} [2024-06-03 20:47:54,790 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-03 20:47:54,790 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 305 transitions, 3870 flow [2024-06-03 20:47:54,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:54,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:54,791 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 20:47:54,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 20:47:54,791 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 20:47:54,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:54,791 INFO L85 PathProgramCache]: Analyzing trace with hash -283403825, now seen corresponding path program 2 times [2024-06-03 20:47:54,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:54,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41038805] [2024-06-03 20:47:54,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:54,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:54,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:54,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41038805] [2024-06-03 20:47:54,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41038805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:54,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:54,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:54,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560329284] [2024-06-03 20:47:54,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:54,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:54,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:54,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:54,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:55,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:55,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 305 transitions, 3870 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:55,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:55,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:55,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:55,530 INFO L124 PetriNetUnfolderBase]: 2012/3465 cut-off events. [2024-06-03 20:47:55,530 INFO L125 PetriNetUnfolderBase]: For 148983/148989 co-relation queries the response was YES. [2024-06-03 20:47:55,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21125 conditions, 3465 events. 2012/3465 cut-off events. For 148983/148989 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 21963 event pairs, 408 based on Foata normal form. 5/3465 useless extension candidates. Maximal degree in co-relation 21014. Up to 3057 conditions per place. [2024-06-03 20:47:55,567 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 282 selfloop transitions, 35 changer transitions 0/324 dead transitions. [2024-06-03 20:47:55,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 324 transitions, 4600 flow [2024-06-03 20:47:55,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:55,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:55,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-03 20:47:55,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-06-03 20:47:55,568 INFO L175 Difference]: Start difference. First operand has 228 places, 305 transitions, 3870 flow. Second operand 6 states and 143 transitions. [2024-06-03 20:47:55,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 324 transitions, 4600 flow [2024-06-03 20:47:55,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 324 transitions, 4430 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:55,947 INFO L231 Difference]: Finished difference. Result has 231 places, 308 transitions, 3838 flow [2024-06-03 20:47:55,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3706, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3838, PETRI_PLACES=231, PETRI_TRANSITIONS=308} [2024-06-03 20:47:55,948 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-03 20:47:55,948 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 308 transitions, 3838 flow [2024-06-03 20:47:55,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:55,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:55,948 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 20:47:55,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 20:47:55,949 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 20:47:55,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:55,949 INFO L85 PathProgramCache]: Analyzing trace with hash -27023285, now seen corresponding path program 3 times [2024-06-03 20:47:55,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:55,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075835465] [2024-06-03 20:47:55,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:55,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:56,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:56,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075835465] [2024-06-03 20:47:56,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075835465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:56,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:56,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:56,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643079129] [2024-06-03 20:47:56,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:56,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:56,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:56,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:56,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:56,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:56,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 308 transitions, 3838 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:56,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:56,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:56,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:56,685 INFO L124 PetriNetUnfolderBase]: 2017/3468 cut-off events. [2024-06-03 20:47:56,685 INFO L125 PetriNetUnfolderBase]: For 154281/154287 co-relation queries the response was YES. [2024-06-03 20:47:56,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21164 conditions, 3468 events. 2017/3468 cut-off events. For 154281/154287 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 21998 event pairs, 424 based on Foata normal form. 5/3465 useless extension candidates. Maximal degree in co-relation 21053. Up to 2981 conditions per place. [2024-06-03 20:47:56,718 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 252 selfloop transitions, 70 changer transitions 0/329 dead transitions. [2024-06-03 20:47:56,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 329 transitions, 4792 flow [2024-06-03 20:47:56,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:56,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:56,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-03 20:47:56,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-03 20:47:56,720 INFO L175 Difference]: Start difference. First operand has 231 places, 308 transitions, 3838 flow. Second operand 6 states and 145 transitions. [2024-06-03 20:47:56,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 329 transitions, 4792 flow [2024-06-03 20:47:57,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 329 transitions, 4692 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:57,050 INFO L231 Difference]: Finished difference. Result has 232 places, 311 transitions, 3934 flow [2024-06-03 20:47:57,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3738, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3934, PETRI_PLACES=232, PETRI_TRANSITIONS=311} [2024-06-03 20:47:57,051 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-03 20:47:57,051 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 311 transitions, 3934 flow [2024-06-03 20:47:57,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:57,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:57,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:57,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 20:47:57,052 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 20:47:57,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:57,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1471358611, now seen corresponding path program 4 times [2024-06-03 20:47:57,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:57,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268538718] [2024-06-03 20:47:57,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:57,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:57,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:57,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268538718] [2024-06-03 20:47:57,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268538718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:57,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:57,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:57,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169300910] [2024-06-03 20:47:57,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:57,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:57,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:57,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:57,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:57,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:57,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 311 transitions, 3934 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:57,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:57,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:57,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:57,742 INFO L124 PetriNetUnfolderBase]: 2014/3464 cut-off events. [2024-06-03 20:47:57,742 INFO L125 PetriNetUnfolderBase]: For 157721/157727 co-relation queries the response was YES. [2024-06-03 20:47:57,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21247 conditions, 3464 events. 2014/3464 cut-off events. For 157721/157727 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 21969 event pairs, 424 based on Foata normal form. 5/3461 useless extension candidates. Maximal degree in co-relation 21136. Up to 2978 conditions per place. [2024-06-03 20:47:57,779 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 249 selfloop transitions, 69 changer transitions 0/325 dead transitions. [2024-06-03 20:47:57,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 325 transitions, 4714 flow [2024-06-03 20:47:57,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:57,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:57,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-03 20:47:57,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-03 20:47:57,780 INFO L175 Difference]: Start difference. First operand has 232 places, 311 transitions, 3934 flow. Second operand 6 states and 141 transitions. [2024-06-03 20:47:57,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 325 transitions, 4714 flow [2024-06-03 20:47:58,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 325 transitions, 4514 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:58,184 INFO L231 Difference]: Finished difference. Result has 234 places, 311 transitions, 3878 flow [2024-06-03 20:47:58,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3734, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3878, PETRI_PLACES=234, PETRI_TRANSITIONS=311} [2024-06-03 20:47:58,185 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-03 20:47:58,185 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 311 transitions, 3878 flow [2024-06-03 20:47:58,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:58,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:58,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:58,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 20:47:58,185 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 20:47:58,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:58,186 INFO L85 PathProgramCache]: Analyzing trace with hash 621287301, now seen corresponding path program 2 times [2024-06-03 20:47:58,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:58,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395366712] [2024-06-03 20:47:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:58,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:58,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:58,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395366712] [2024-06-03 20:47:58,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395366712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:58,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:58,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:47:58,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717171110] [2024-06-03 20:47:58,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:58,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:47:58,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:58,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:47:58,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:47:58,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:58,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 311 transitions, 3878 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:58,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:58,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:58,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:58,954 INFO L124 PetriNetUnfolderBase]: 2019/3468 cut-off events. [2024-06-03 20:47:58,955 INFO L125 PetriNetUnfolderBase]: For 161230/161230 co-relation queries the response was YES. [2024-06-03 20:47:58,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21348 conditions, 3468 events. 2019/3468 cut-off events. For 161230/161230 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 21954 event pairs, 418 based on Foata normal form. 1/3462 useless extension candidates. Maximal degree in co-relation 21236. Up to 3013 conditions per place. [2024-06-03 20:47:58,987 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 259 selfloop transitions, 64 changer transitions 0/330 dead transitions. [2024-06-03 20:47:58,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 330 transitions, 4844 flow [2024-06-03 20:47:58,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:58,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:58,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 20:47:58,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-03 20:47:58,988 INFO L175 Difference]: Start difference. First operand has 234 places, 311 transitions, 3878 flow. Second operand 7 states and 163 transitions. [2024-06-03 20:47:58,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 330 transitions, 4844 flow [2024-06-03 20:47:59,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 330 transitions, 4659 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:59,350 INFO L231 Difference]: Finished difference. Result has 236 places, 314 transitions, 3885 flow [2024-06-03 20:47:59,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3693, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3885, PETRI_PLACES=236, PETRI_TRANSITIONS=314} [2024-06-03 20:47:59,351 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-03 20:47:59,351 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 314 transitions, 3885 flow [2024-06-03 20:47:59,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:59,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:59,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:59,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 20:47:59,351 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 20:47:59,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:59,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1492685043, now seen corresponding path program 5 times [2024-06-03 20:47:59,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:59,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881653257] [2024-06-03 20:47:59,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:59,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:59,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:59,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881653257] [2024-06-03 20:47:59,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881653257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:59,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:59,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:47:59,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355854642] [2024-06-03 20:47:59,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:59,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:47:59,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:59,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:47:59,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:47:59,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:47:59,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 314 transitions, 3885 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:59,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:59,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:47:59,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:00,179 INFO L124 PetriNetUnfolderBase]: 2013/3465 cut-off events. [2024-06-03 20:48:00,180 INFO L125 PetriNetUnfolderBase]: For 165710/165716 co-relation queries the response was YES. [2024-06-03 20:48:00,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21170 conditions, 3465 events. 2013/3465 cut-off events. For 165710/165716 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22014 event pairs, 423 based on Foata normal form. 6/3463 useless extension candidates. Maximal degree in co-relation 21058. Up to 2994 conditions per place. [2024-06-03 20:48:00,217 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 264 selfloop transitions, 59 changer transitions 0/330 dead transitions. [2024-06-03 20:48:00,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 330 transitions, 4685 flow [2024-06-03 20:48:00,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:48:00,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:48:00,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-03 20:48:00,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 20:48:00,219 INFO L175 Difference]: Start difference. First operand has 236 places, 314 transitions, 3885 flow. Second operand 5 states and 126 transitions. [2024-06-03 20:48:00,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 330 transitions, 4685 flow [2024-06-03 20:48:00,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 330 transitions, 4542 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:00,830 INFO L231 Difference]: Finished difference. Result has 237 places, 314 transitions, 3874 flow [2024-06-03 20:48:00,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3742, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3874, PETRI_PLACES=237, PETRI_TRANSITIONS=314} [2024-06-03 20:48:00,830 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-03 20:48:00,830 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 314 transitions, 3874 flow [2024-06-03 20:48:00,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:00,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:00,831 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 20:48:00,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 20:48:00,831 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 20:48:00,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:00,831 INFO L85 PathProgramCache]: Analyzing trace with hash -23299051, now seen corresponding path program 6 times [2024-06-03 20:48:00,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:00,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011190492] [2024-06-03 20:48:00,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:00,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:01,064 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 20:48:01,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:01,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011190492] [2024-06-03 20:48:01,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011190492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:01,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:01,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:48:01,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163714845] [2024-06-03 20:48:01,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:01,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:48:01,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:01,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:48:01,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:48:01,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:01,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 314 transitions, 3874 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:01,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:01,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:01,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:01,658 INFO L124 PetriNetUnfolderBase]: 2007/3463 cut-off events. [2024-06-03 20:48:01,659 INFO L125 PetriNetUnfolderBase]: For 167550/167556 co-relation queries the response was YES. [2024-06-03 20:48:01,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21070 conditions, 3463 events. 2007/3463 cut-off events. For 167550/167556 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22001 event pairs, 407 based on Foata normal form. 6/3464 useless extension candidates. Maximal degree in co-relation 20956. Up to 2988 conditions per place. [2024-06-03 20:48:01,693 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 266 selfloop transitions, 67 changer transitions 0/340 dead transitions. [2024-06-03 20:48:01,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 340 transitions, 4606 flow [2024-06-03 20:48:01,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:01,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:01,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 20:48:01,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-03 20:48:01,695 INFO L175 Difference]: Start difference. First operand has 237 places, 314 transitions, 3874 flow. Second operand 7 states and 173 transitions. [2024-06-03 20:48:01,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 340 transitions, 4606 flow [2024-06-03 20:48:02,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 340 transitions, 4427 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:02,178 INFO L231 Difference]: Finished difference. Result has 238 places, 314 transitions, 3846 flow [2024-06-03 20:48:02,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3695, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3846, PETRI_PLACES=238, PETRI_TRANSITIONS=314} [2024-06-03 20:48:02,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-03 20:48:02,179 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 314 transitions, 3846 flow [2024-06-03 20:48:02,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:02,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:02,179 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 20:48:02,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 20:48:02,179 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 20:48:02,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:02,180 INFO L85 PathProgramCache]: Analyzing trace with hash 246791045, now seen corresponding path program 3 times [2024-06-03 20:48:02,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:02,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788219884] [2024-06-03 20:48:02,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:02,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:02,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:02,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:02,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788219884] [2024-06-03 20:48:02,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788219884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:02,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:02,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:02,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351629948] [2024-06-03 20:48:02,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:02,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:02,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:02,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:02,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:02,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:02,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 314 transitions, 3846 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:02,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:02,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:02,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:02,929 INFO L124 PetriNetUnfolderBase]: 2004/3459 cut-off events. [2024-06-03 20:48:02,929 INFO L125 PetriNetUnfolderBase]: For 164127/164133 co-relation queries the response was YES. [2024-06-03 20:48:02,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20977 conditions, 3459 events. 2004/3459 cut-off events. For 164127/164133 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 22013 event pairs, 414 based on Foata normal form. 5/3459 useless extension candidates. Maximal degree in co-relation 20863. Up to 2994 conditions per place. [2024-06-03 20:48:02,967 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 259 selfloop transitions, 65 changer transitions 0/331 dead transitions. [2024-06-03 20:48:02,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 331 transitions, 4652 flow [2024-06-03 20:48:02,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:02,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:02,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-03 20:48:02,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-03 20:48:02,968 INFO L175 Difference]: Start difference. First operand has 238 places, 314 transitions, 3846 flow. Second operand 6 states and 146 transitions. [2024-06-03 20:48:02,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 331 transitions, 4652 flow [2024-06-03 20:48:03,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 331 transitions, 4492 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:03,384 INFO L231 Difference]: Finished difference. Result has 237 places, 314 transitions, 3830 flow [2024-06-03 20:48:03,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3690, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3830, PETRI_PLACES=237, PETRI_TRANSITIONS=314} [2024-06-03 20:48:03,385 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-03 20:48:03,385 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 314 transitions, 3830 flow [2024-06-03 20:48:03,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:03,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:03,385 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 20:48:03,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 20:48:03,385 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 20:48:03,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:03,386 INFO L85 PathProgramCache]: Analyzing trace with hash 612909549, now seen corresponding path program 4 times [2024-06-03 20:48:03,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:03,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454277641] [2024-06-03 20:48:03,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:03,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:03,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:03,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:03,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454277641] [2024-06-03 20:48:03,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454277641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:03,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:03,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:03,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829938659] [2024-06-03 20:48:03,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:03,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:03,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:03,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:03,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:03,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:03,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 314 transitions, 3830 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:03,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:03,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:03,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:04,189 INFO L124 PetriNetUnfolderBase]: 2001/3444 cut-off events. [2024-06-03 20:48:04,189 INFO L125 PetriNetUnfolderBase]: For 156757/156757 co-relation queries the response was YES. [2024-06-03 20:48:04,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20753 conditions, 3444 events. 2001/3444 cut-off events. For 156757/156757 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 21818 event pairs, 417 based on Foata normal form. 1/3438 useless extension candidates. Maximal degree in co-relation 20639. Up to 2991 conditions per place. [2024-06-03 20:48:04,223 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 255 selfloop transitions, 65 changer transitions 0/327 dead transitions. [2024-06-03 20:48:04,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 327 transitions, 4502 flow [2024-06-03 20:48:04,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:04,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:04,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-03 20:48:04,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-03 20:48:04,224 INFO L175 Difference]: Start difference. First operand has 237 places, 314 transitions, 3830 flow. Second operand 6 states and 142 transitions. [2024-06-03 20:48:04,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 327 transitions, 4502 flow [2024-06-03 20:48:04,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 327 transitions, 4318 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:04,561 INFO L231 Difference]: Finished difference. Result has 237 places, 314 transitions, 3786 flow [2024-06-03 20:48:04,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3646, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3786, PETRI_PLACES=237, PETRI_TRANSITIONS=314} [2024-06-03 20:48:04,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-03 20:48:04,562 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 314 transitions, 3786 flow [2024-06-03 20:48:04,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:04,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:04,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:04,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 20:48:04,563 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 20:48:04,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:04,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1012718179, now seen corresponding path program 2 times [2024-06-03 20:48:04,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:04,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128933667] [2024-06-03 20:48:04,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:04,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:04,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:04,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:04,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128933667] [2024-06-03 20:48:04,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128933667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:04,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:04,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:04,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669474401] [2024-06-03 20:48:04,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:04,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:04,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:04,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:04,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:04,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:04,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 314 transitions, 3786 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:04,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:04,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:04,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:05,304 INFO L124 PetriNetUnfolderBase]: 2017/3479 cut-off events. [2024-06-03 20:48:05,305 INFO L125 PetriNetUnfolderBase]: For 162773/162779 co-relation queries the response was YES. [2024-06-03 20:48:05,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20873 conditions, 3479 events. 2017/3479 cut-off events. For 162773/162779 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 22125 event pairs, 416 based on Foata normal form. 8/3482 useless extension candidates. Maximal degree in co-relation 20760. Up to 2991 conditions per place. [2024-06-03 20:48:05,341 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 256 selfloop transitions, 71 changer transitions 0/334 dead transitions. [2024-06-03 20:48:05,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 334 transitions, 4540 flow [2024-06-03 20:48:05,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:05,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-03 20:48:05,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-03 20:48:05,343 INFO L175 Difference]: Start difference. First operand has 237 places, 314 transitions, 3786 flow. Second operand 6 states and 146 transitions. [2024-06-03 20:48:05,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 334 transitions, 4540 flow [2024-06-03 20:48:05,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 334 transitions, 4332 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:05,846 INFO L231 Difference]: Finished difference. Result has 236 places, 317 transitions, 3794 flow [2024-06-03 20:48:05,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3578, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3794, PETRI_PLACES=236, PETRI_TRANSITIONS=317} [2024-06-03 20:48:05,846 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-03 20:48:05,846 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 317 transitions, 3794 flow [2024-06-03 20:48:05,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:05,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:05,847 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 20:48:05,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 20:48:05,847 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 20:48:05,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:05,847 INFO L85 PathProgramCache]: Analyzing trace with hash 259312193, now seen corresponding path program 3 times [2024-06-03 20:48:05,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:05,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335377924] [2024-06-03 20:48:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:05,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:06,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:06,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335377924] [2024-06-03 20:48:06,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335377924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:06,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:06,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:06,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145010026] [2024-06-03 20:48:06,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:06,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:06,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:06,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:06,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:06,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:06,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 317 transitions, 3794 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:06,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:06,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:06,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:06,725 INFO L124 PetriNetUnfolderBase]: 2033/3505 cut-off events. [2024-06-03 20:48:06,725 INFO L125 PetriNetUnfolderBase]: For 161799/161799 co-relation queries the response was YES. [2024-06-03 20:48:06,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21186 conditions, 3505 events. 2033/3505 cut-off events. For 161799/161799 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 22249 event pairs, 397 based on Foata normal form. 4/3506 useless extension candidates. Maximal degree in co-relation 21073. Up to 3067 conditions per place. [2024-06-03 20:48:06,761 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 287 selfloop transitions, 46 changer transitions 0/340 dead transitions. [2024-06-03 20:48:06,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 340 transitions, 4574 flow [2024-06-03 20:48:06,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:06,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:06,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 20:48:06,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-03 20:48:06,763 INFO L175 Difference]: Start difference. First operand has 236 places, 317 transitions, 3794 flow. Second operand 6 states and 149 transitions. [2024-06-03 20:48:06,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 340 transitions, 4574 flow [2024-06-03 20:48:07,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 340 transitions, 4380 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:07,286 INFO L231 Difference]: Finished difference. Result has 238 places, 320 transitions, 3768 flow [2024-06-03 20:48:07,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3606, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3768, PETRI_PLACES=238, PETRI_TRANSITIONS=320} [2024-06-03 20:48:07,286 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-03 20:48:07,287 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 320 transitions, 3768 flow [2024-06-03 20:48:07,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:07,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:07,287 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 20:48:07,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 20:48:07,287 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 20:48:07,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:07,288 INFO L85 PathProgramCache]: Analyzing trace with hash -999758629, now seen corresponding path program 4 times [2024-06-03 20:48:07,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:07,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393164512] [2024-06-03 20:48:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:07,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:07,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:07,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393164512] [2024-06-03 20:48:07,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393164512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:07,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:07,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:07,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443865326] [2024-06-03 20:48:07,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:07,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:07,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:07,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:07,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:07,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:07,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 320 transitions, 3768 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:07,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:07,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:07,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:08,125 INFO L124 PetriNetUnfolderBase]: 2065/3559 cut-off events. [2024-06-03 20:48:08,125 INFO L125 PetriNetUnfolderBase]: For 165096/165096 co-relation queries the response was YES. [2024-06-03 20:48:08,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21504 conditions, 3559 events. 2065/3559 cut-off events. For 165096/165096 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 22663 event pairs, 396 based on Foata normal form. 4/3560 useless extension candidates. Maximal degree in co-relation 21390. Up to 3060 conditions per place. [2024-06-03 20:48:08,162 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 294 selfloop transitions, 44 changer transitions 0/345 dead transitions. [2024-06-03 20:48:08,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 345 transitions, 4726 flow [2024-06-03 20:48:08,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:08,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:08,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-03 20:48:08,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 20:48:08,164 INFO L175 Difference]: Start difference. First operand has 238 places, 320 transitions, 3768 flow. Second operand 6 states and 147 transitions. [2024-06-03 20:48:08,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 345 transitions, 4726 flow [2024-06-03 20:48:08,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 345 transitions, 4586 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:08,615 INFO L231 Difference]: Finished difference. Result has 241 places, 326 transitions, 3863 flow [2024-06-03 20:48:08,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3628, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3863, PETRI_PLACES=241, PETRI_TRANSITIONS=326} [2024-06-03 20:48:08,615 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-03 20:48:08,615 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 326 transitions, 3863 flow [2024-06-03 20:48:08,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:08,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:08,616 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 20:48:08,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 20:48:08,616 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 20:48:08,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:08,616 INFO L85 PathProgramCache]: Analyzing trace with hash -35706805, now seen corresponding path program 1 times [2024-06-03 20:48:08,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:08,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644461161] [2024-06-03 20:48:08,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:08,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:08,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:08,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644461161] [2024-06-03 20:48:08,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644461161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:08,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:08,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:08,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211625350] [2024-06-03 20:48:08,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:08,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:08,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:08,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:08,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:08,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:08,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 326 transitions, 3863 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:08,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:08,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:08,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:09,405 INFO L124 PetriNetUnfolderBase]: 2094/3602 cut-off events. [2024-06-03 20:48:09,405 INFO L125 PetriNetUnfolderBase]: For 176792/176792 co-relation queries the response was YES. [2024-06-03 20:48:09,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22101 conditions, 3602 events. 2094/3602 cut-off events. For 176792/176792 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 22985 event pairs, 374 based on Foata normal form. 4/3598 useless extension candidates. Maximal degree in co-relation 21985. Up to 3024 conditions per place. [2024-06-03 20:48:09,445 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 265 selfloop transitions, 83 changer transitions 0/355 dead transitions. [2024-06-03 20:48:09,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 355 transitions, 4843 flow [2024-06-03 20:48:09,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:09,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:09,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:48:09,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-03 20:48:09,446 INFO L175 Difference]: Start difference. First operand has 241 places, 326 transitions, 3863 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:48:09,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 355 transitions, 4843 flow [2024-06-03 20:48:09,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 355 transitions, 4720 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-03 20:48:09,951 INFO L231 Difference]: Finished difference. Result has 246 places, 332 transitions, 4030 flow [2024-06-03 20:48:09,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3740, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4030, PETRI_PLACES=246, PETRI_TRANSITIONS=332} [2024-06-03 20:48:09,952 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-03 20:48:09,952 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 332 transitions, 4030 flow [2024-06-03 20:48:09,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:09,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:09,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:09,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 20:48:09,953 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 20:48:09,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:09,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1377403793, now seen corresponding path program 2 times [2024-06-03 20:48:09,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:09,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682409866] [2024-06-03 20:48:09,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:09,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:10,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:10,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:10,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682409866] [2024-06-03 20:48:10,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682409866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:10,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:10,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:10,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373924630] [2024-06-03 20:48:10,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:10,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:10,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:10,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:10,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:10,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:10,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 332 transitions, 4030 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:10,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:10,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:10,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:10,748 INFO L124 PetriNetUnfolderBase]: 2110/3621 cut-off events. [2024-06-03 20:48:10,748 INFO L125 PetriNetUnfolderBase]: For 181977/181977 co-relation queries the response was YES. [2024-06-03 20:48:10,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22466 conditions, 3621 events. 2110/3621 cut-off events. For 181977/181977 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 23084 event pairs, 431 based on Foata normal form. 4/3617 useless extension candidates. Maximal degree in co-relation 22348. Up to 3116 conditions per place. [2024-06-03 20:48:10,789 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 268 selfloop transitions, 78 changer transitions 0/353 dead transitions. [2024-06-03 20:48:10,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 353 transitions, 4828 flow [2024-06-03 20:48:10,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:10,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:10,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 20:48:10,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-03 20:48:10,790 INFO L175 Difference]: Start difference. First operand has 246 places, 332 transitions, 4030 flow. Second operand 7 states and 165 transitions. [2024-06-03 20:48:10,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 353 transitions, 4828 flow [2024-06-03 20:48:11,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 353 transitions, 4636 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-03 20:48:11,249 INFO L231 Difference]: Finished difference. Result has 250 places, 335 transitions, 4068 flow [2024-06-03 20:48:11,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3864, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4068, PETRI_PLACES=250, PETRI_TRANSITIONS=335} [2024-06-03 20:48:11,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-03 20:48:11,250 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 335 transitions, 4068 flow [2024-06-03 20:48:11,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:11,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:11,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:11,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 20:48:11,250 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 20:48:11,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:11,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1492694963, now seen corresponding path program 3 times [2024-06-03 20:48:11,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:11,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159061355] [2024-06-03 20:48:11,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:11,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:11,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:11,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159061355] [2024-06-03 20:48:11,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159061355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:11,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:11,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:11,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625082208] [2024-06-03 20:48:11,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:11,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:11,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:11,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:11,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:11,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:11,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 335 transitions, 4068 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:11,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:11,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:11,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:12,031 INFO L124 PetriNetUnfolderBase]: 2126/3650 cut-off events. [2024-06-03 20:48:12,031 INFO L125 PetriNetUnfolderBase]: For 186689/186689 co-relation queries the response was YES. [2024-06-03 20:48:12,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22639 conditions, 3650 events. 2126/3650 cut-off events. For 186689/186689 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 23252 event pairs, 415 based on Foata normal form. 4/3647 useless extension candidates. Maximal degree in co-relation 22519. Up to 3215 conditions per place. [2024-06-03 20:48:12,077 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 307 selfloop transitions, 39 changer transitions 0/353 dead transitions. [2024-06-03 20:48:12,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 353 transitions, 4838 flow [2024-06-03 20:48:12,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:12,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:12,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-03 20:48:12,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-06-03 20:48:12,078 INFO L175 Difference]: Start difference. First operand has 250 places, 335 transitions, 4068 flow. Second operand 7 states and 160 transitions. [2024-06-03 20:48:12,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 353 transitions, 4838 flow [2024-06-03 20:48:12,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 353 transitions, 4662 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:12,439 INFO L231 Difference]: Finished difference. Result has 252 places, 338 transitions, 4024 flow [2024-06-03 20:48:12,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3892, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4024, PETRI_PLACES=252, PETRI_TRANSITIONS=338} [2024-06-03 20:48:12,440 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-03 20:48:12,440 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 338 transitions, 4024 flow [2024-06-03 20:48:12,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:12,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:12,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:12,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 20:48:12,441 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 20:48:12,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:12,441 INFO L85 PathProgramCache]: Analyzing trace with hash 82626023, now seen corresponding path program 1 times [2024-06-03 20:48:12,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:12,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039381942] [2024-06-03 20:48:12,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:12,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:12,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:12,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:12,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039381942] [2024-06-03 20:48:12,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039381942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:12,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:12,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:12,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072395327] [2024-06-03 20:48:12,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:12,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:12,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:12,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:12,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:12,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:12,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 338 transitions, 4024 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:12,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:12,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:12,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:13,259 INFO L124 PetriNetUnfolderBase]: 2142/3673 cut-off events. [2024-06-03 20:48:13,259 INFO L125 PetriNetUnfolderBase]: For 192728/192728 co-relation queries the response was YES. [2024-06-03 20:48:13,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22821 conditions, 3673 events. 2142/3673 cut-off events. For 192728/192728 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 23431 event pairs, 424 based on Foata normal form. 4/3670 useless extension candidates. Maximal degree in co-relation 22700. Up to 3190 conditions per place. [2024-06-03 20:48:13,298 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 282 selfloop transitions, 67 changer transitions 0/356 dead transitions. [2024-06-03 20:48:13,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 356 transitions, 4826 flow [2024-06-03 20:48:13,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:13,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:13,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-03 20:48:13,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-06-03 20:48:13,299 INFO L175 Difference]: Start difference. First operand has 252 places, 338 transitions, 4024 flow. Second operand 7 states and 162 transitions. [2024-06-03 20:48:13,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 356 transitions, 4826 flow [2024-06-03 20:48:13,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 356 transitions, 4722 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:13,742 INFO L231 Difference]: Finished difference. Result has 254 places, 341 transitions, 4134 flow [2024-06-03 20:48:13,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3920, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4134, PETRI_PLACES=254, PETRI_TRANSITIONS=341} [2024-06-03 20:48:13,742 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-03 20:48:13,743 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 341 transitions, 4134 flow [2024-06-03 20:48:13,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:13,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:13,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:13,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 20:48:13,743 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 20:48:13,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:13,744 INFO L85 PathProgramCache]: Analyzing trace with hash 453483979, now seen corresponding path program 4 times [2024-06-03 20:48:13,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:13,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771641420] [2024-06-03 20:48:13,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:13,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:13,967 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 20:48:13,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:13,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771641420] [2024-06-03 20:48:13,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771641420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:13,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:13,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:13,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909251002] [2024-06-03 20:48:13,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:13,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:13,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:13,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:13,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:14,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:14,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 341 transitions, 4134 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:14,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:14,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:14,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:14,587 INFO L124 PetriNetUnfolderBase]: 2132/3665 cut-off events. [2024-06-03 20:48:14,588 INFO L125 PetriNetUnfolderBase]: For 191286/191286 co-relation queries the response was YES. [2024-06-03 20:48:14,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22709 conditions, 3665 events. 2132/3665 cut-off events. For 191286/191286 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23397 event pairs, 358 based on Foata normal form. 4/3662 useless extension candidates. Maximal degree in co-relation 22587. Up to 3115 conditions per place. [2024-06-03 20:48:14,630 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 282 selfloop transitions, 76 changer transitions 0/365 dead transitions. [2024-06-03 20:48:14,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 365 transitions, 4910 flow [2024-06-03 20:48:14,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:48:14,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-03 20:48:14,642 INFO L175 Difference]: Start difference. First operand has 254 places, 341 transitions, 4134 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:48:14,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 365 transitions, 4910 flow [2024-06-03 20:48:15,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 365 transitions, 4698 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:15,034 INFO L231 Difference]: Finished difference. Result has 256 places, 341 transitions, 4089 flow [2024-06-03 20:48:15,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3922, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4089, PETRI_PLACES=256, PETRI_TRANSITIONS=341} [2024-06-03 20:48:15,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-03 20:48:15,037 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 341 transitions, 4089 flow [2024-06-03 20:48:15,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:15,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:15,037 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 20:48:15,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 20:48:15,038 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 20:48:15,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:15,038 INFO L85 PathProgramCache]: Analyzing trace with hash 619181531, now seen corresponding path program 2 times [2024-06-03 20:48:15,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:15,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715635454] [2024-06-03 20:48:15,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:15,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:15,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:15,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715635454] [2024-06-03 20:48:15,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715635454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:15,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:15,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:15,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446277390] [2024-06-03 20:48:15,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:15,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:15,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:15,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:15,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:15,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:15,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 341 transitions, 4089 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:15,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:15,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:15,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:15,866 INFO L124 PetriNetUnfolderBase]: 2148/3691 cut-off events. [2024-06-03 20:48:15,866 INFO L125 PetriNetUnfolderBase]: For 195623/195623 co-relation queries the response was YES. [2024-06-03 20:48:15,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22867 conditions, 3691 events. 2148/3691 cut-off events. For 195623/195623 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23587 event pairs, 400 based on Foata normal form. 4/3692 useless extension candidates. Maximal degree in co-relation 22744. Up to 3240 conditions per place. [2024-06-03 20:48:15,908 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 311 selfloop transitions, 46 changer transitions 0/364 dead transitions. [2024-06-03 20:48:15,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 364 transitions, 4897 flow [2024-06-03 20:48:15,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:15,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 20:48:15,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-03 20:48:15,909 INFO L175 Difference]: Start difference. First operand has 256 places, 341 transitions, 4089 flow. Second operand 6 states and 149 transitions. [2024-06-03 20:48:15,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 364 transitions, 4897 flow [2024-06-03 20:48:16,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 364 transitions, 4733 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:16,363 INFO L231 Difference]: Finished difference. Result has 256 places, 344 transitions, 4073 flow [2024-06-03 20:48:16,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3925, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4073, PETRI_PLACES=256, PETRI_TRANSITIONS=344} [2024-06-03 20:48:16,364 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-03 20:48:16,364 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 344 transitions, 4073 flow [2024-06-03 20:48:16,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:16,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:16,364 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 20:48:16,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 20:48:16,365 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 20:48:16,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:16,365 INFO L85 PathProgramCache]: Analyzing trace with hash 690140707, now seen corresponding path program 3 times [2024-06-03 20:48:16,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:16,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917887226] [2024-06-03 20:48:16,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:16,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:16,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:16,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917887226] [2024-06-03 20:48:16,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917887226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:16,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:16,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:16,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385748729] [2024-06-03 20:48:16,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:16,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:16,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:16,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:16,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:16,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:16,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 344 transitions, 4073 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:16,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:16,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:16,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:17,169 INFO L124 PetriNetUnfolderBase]: 2135/3672 cut-off events. [2024-06-03 20:48:17,169 INFO L125 PetriNetUnfolderBase]: For 187334/187334 co-relation queries the response was YES. [2024-06-03 20:48:17,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22416 conditions, 3672 events. 2135/3672 cut-off events. For 187334/187334 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 23432 event pairs, 395 based on Foata normal form. 4/3673 useless extension candidates. Maximal degree in co-relation 22292. Up to 3163 conditions per place. [2024-06-03 20:48:17,212 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 308 selfloop transitions, 47 changer transitions 0/362 dead transitions. [2024-06-03 20:48:17,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 362 transitions, 4827 flow [2024-06-03 20:48:17,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:17,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-03 20:48:17,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-03 20:48:17,213 INFO L175 Difference]: Start difference. First operand has 256 places, 344 transitions, 4073 flow. Second operand 6 states and 146 transitions. [2024-06-03 20:48:17,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 362 transitions, 4827 flow [2024-06-03 20:48:17,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 362 transitions, 4689 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:17,651 INFO L231 Difference]: Finished difference. Result has 258 places, 344 transitions, 4037 flow [2024-06-03 20:48:17,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3935, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4037, PETRI_PLACES=258, PETRI_TRANSITIONS=344} [2024-06-03 20:48:17,652 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-03 20:48:17,652 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 344 transitions, 4037 flow [2024-06-03 20:48:17,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:17,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:17,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:17,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 20:48:17,653 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 20:48:17,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:17,653 INFO L85 PathProgramCache]: Analyzing trace with hash 453668677, now seen corresponding path program 4 times [2024-06-03 20:48:17,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:17,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586175948] [2024-06-03 20:48:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:17,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:17,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:17,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586175948] [2024-06-03 20:48:17,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586175948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:17,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:17,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:17,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107681395] [2024-06-03 20:48:17,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:17,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:17,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:17,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:17,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:17,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:17,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 344 transitions, 4037 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:17,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:17,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:17,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:18,411 INFO L124 PetriNetUnfolderBase]: 2138/3658 cut-off events. [2024-06-03 20:48:18,411 INFO L125 PetriNetUnfolderBase]: For 189742/189742 co-relation queries the response was YES. [2024-06-03 20:48:18,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22339 conditions, 3658 events. 2138/3658 cut-off events. For 189742/189742 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23315 event pairs, 422 based on Foata normal form. 4/3655 useless extension candidates. Maximal degree in co-relation 22214. Up to 3174 conditions per place. [2024-06-03 20:48:18,453 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 283 selfloop transitions, 71 changer transitions 0/361 dead transitions. [2024-06-03 20:48:18,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 361 transitions, 4853 flow [2024-06-03 20:48:18,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:18,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:18,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-03 20:48:18,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-06-03 20:48:18,454 INFO L175 Difference]: Start difference. First operand has 258 places, 344 transitions, 4037 flow. Second operand 6 states and 143 transitions. [2024-06-03 20:48:18,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 361 transitions, 4853 flow [2024-06-03 20:48:18,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 361 transitions, 4740 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:18,923 INFO L231 Difference]: Finished difference. Result has 259 places, 347 transitions, 4156 flow [2024-06-03 20:48:18,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3924, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4156, PETRI_PLACES=259, PETRI_TRANSITIONS=347} [2024-06-03 20:48:18,924 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-03 20:48:18,924 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 347 transitions, 4156 flow [2024-06-03 20:48:18,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:18,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:18,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:18,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 20:48:18,924 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 20:48:18,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:18,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1110363624, now seen corresponding path program 1 times [2024-06-03 20:48:18,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:18,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249465613] [2024-06-03 20:48:18,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:18,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:19,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:19,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249465613] [2024-06-03 20:48:19,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249465613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:19,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:19,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:19,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044308259] [2024-06-03 20:48:19,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:19,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:19,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:19,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:19,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:19,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:19,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 347 transitions, 4156 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:19,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:19,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:19,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:19,798 INFO L124 PetriNetUnfolderBase]: 2151/3692 cut-off events. [2024-06-03 20:48:19,798 INFO L125 PetriNetUnfolderBase]: For 192465/192471 co-relation queries the response was YES. [2024-06-03 20:48:19,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22759 conditions, 3692 events. 2151/3692 cut-off events. For 192465/192471 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 23554 event pairs, 418 based on Foata normal form. 5/3692 useless extension candidates. Maximal degree in co-relation 22633. Up to 3204 conditions per place. [2024-06-03 20:48:19,840 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 294 selfloop transitions, 73 changer transitions 0/374 dead transitions. [2024-06-03 20:48:19,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 374 transitions, 5158 flow [2024-06-03 20:48:19,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:19,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:19,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-03 20:48:19,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2024-06-03 20:48:19,841 INFO L175 Difference]: Start difference. First operand has 259 places, 347 transitions, 4156 flow. Second operand 10 states and 219 transitions. [2024-06-03 20:48:19,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 374 transitions, 5158 flow [2024-06-03 20:48:20,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 374 transitions, 4952 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:20,567 INFO L231 Difference]: Finished difference. Result has 266 places, 353 transitions, 4209 flow [2024-06-03 20:48:20,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3952, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4209, PETRI_PLACES=266, PETRI_TRANSITIONS=353} [2024-06-03 20:48:20,567 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-03 20:48:20,567 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 353 transitions, 4209 flow [2024-06-03 20:48:20,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:20,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:20,568 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] [2024-06-03 20:48:20,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 20:48:20,568 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 20:48:20,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:20,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1590534910, now seen corresponding path program 2 times [2024-06-03 20:48:20,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:20,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662518832] [2024-06-03 20:48:20,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:20,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:20,808 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 20:48:20,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:20,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662518832] [2024-06-03 20:48:20,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662518832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:20,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:20,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:20,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395846344] [2024-06-03 20:48:20,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:20,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:20,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:20,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:20,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:20,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:20,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 353 transitions, 4209 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:20,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:20,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:20,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:21,432 INFO L124 PetriNetUnfolderBase]: 2172/3725 cut-off events. [2024-06-03 20:48:21,433 INFO L125 PetriNetUnfolderBase]: For 195500/195506 co-relation queries the response was YES. [2024-06-03 20:48:21,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22891 conditions, 3725 events. 2172/3725 cut-off events. For 195500/195506 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 23806 event pairs, 448 based on Foata normal form. 1/3719 useless extension candidates. Maximal degree in co-relation 22763. Up to 3068 conditions per place. [2024-06-03 20:48:21,477 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 238 selfloop transitions, 140 changer transitions 0/385 dead transitions. [2024-06-03 20:48:21,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 385 transitions, 5549 flow [2024-06-03 20:48:21,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:21,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:21,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-03 20:48:21,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-03 20:48:21,479 INFO L175 Difference]: Start difference. First operand has 266 places, 353 transitions, 4209 flow. Second operand 7 states and 172 transitions. [2024-06-03 20:48:21,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 385 transitions, 5549 flow [2024-06-03 20:48:22,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 385 transitions, 5364 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:22,135 INFO L231 Difference]: Finished difference. Result has 266 places, 362 transitions, 4448 flow [2024-06-03 20:48:22,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4024, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4448, PETRI_PLACES=266, PETRI_TRANSITIONS=362} [2024-06-03 20:48:22,135 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-03 20:48:22,136 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 362 transitions, 4448 flow [2024-06-03 20:48:22,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:22,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:22,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:22,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 20:48:22,136 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 20:48:22,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:22,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1586810260, now seen corresponding path program 3 times [2024-06-03 20:48:22,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:22,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759216071] [2024-06-03 20:48:22,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:22,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:22,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:22,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759216071] [2024-06-03 20:48:22,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759216071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:22,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:22,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:22,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819573712] [2024-06-03 20:48:22,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:22,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:22,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:22,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:22,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:22,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:22,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 362 transitions, 4448 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:22,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:22,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:22,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:23,019 INFO L124 PetriNetUnfolderBase]: 2177/3736 cut-off events. [2024-06-03 20:48:23,019 INFO L125 PetriNetUnfolderBase]: For 201427/201433 co-relation queries the response was YES. [2024-06-03 20:48:23,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23168 conditions, 3736 events. 2177/3736 cut-off events. For 201427/201433 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 23909 event pairs, 419 based on Foata normal form. 5/3736 useless extension candidates. Maximal degree in co-relation 23039. Up to 3242 conditions per place. [2024-06-03 20:48:23,060 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 305 selfloop transitions, 73 changer transitions 0/385 dead transitions. [2024-06-03 20:48:23,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 385 transitions, 5424 flow [2024-06-03 20:48:23,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:23,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-03 20:48:23,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-03 20:48:23,062 INFO L175 Difference]: Start difference. First operand has 266 places, 362 transitions, 4448 flow. Second operand 9 states and 201 transitions. [2024-06-03 20:48:23,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 385 transitions, 5424 flow [2024-06-03 20:48:23,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 385 transitions, 5114 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:23,809 INFO L231 Difference]: Finished difference. Result has 271 places, 365 transitions, 4330 flow [2024-06-03 20:48:23,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4144, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4330, PETRI_PLACES=271, PETRI_TRANSITIONS=365} [2024-06-03 20:48:23,809 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-03 20:48:23,809 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 365 transitions, 4330 flow [2024-06-03 20:48:23,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:23,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:23,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:23,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 20:48:23,811 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 20:48:23,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:23,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1368889870, now seen corresponding path program 4 times [2024-06-03 20:48:23,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:23,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655784964] [2024-06-03 20:48:23,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:23,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:24,006 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 20:48:24,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:24,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655784964] [2024-06-03 20:48:24,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655784964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:24,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:24,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:24,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121410945] [2024-06-03 20:48:24,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:24,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:24,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:24,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:24,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:24,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:24,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 365 transitions, 4330 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:24,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:24,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:24,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:24,571 INFO L124 PetriNetUnfolderBase]: 2182/3739 cut-off events. [2024-06-03 20:48:24,571 INFO L125 PetriNetUnfolderBase]: For 206525/206531 co-relation queries the response was YES. [2024-06-03 20:48:24,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23106 conditions, 3739 events. 2182/3739 cut-off events. For 206525/206531 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 23919 event pairs, 443 based on Foata normal form. 5/3736 useless extension candidates. Maximal degree in co-relation 22977. Up to 3080 conditions per place. [2024-06-03 20:48:24,614 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 240 selfloop transitions, 140 changer transitions 0/387 dead transitions. [2024-06-03 20:48:24,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 387 transitions, 5448 flow [2024-06-03 20:48:24,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:24,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:24,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 20:48:24,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-03 20:48:24,615 INFO L175 Difference]: Start difference. First operand has 271 places, 365 transitions, 4330 flow. Second operand 7 states and 166 transitions. [2024-06-03 20:48:24,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 387 transitions, 5448 flow [2024-06-03 20:48:25,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 387 transitions, 5292 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:25,254 INFO L231 Difference]: Finished difference. Result has 271 places, 368 transitions, 4504 flow [2024-06-03 20:48:25,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4174, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4504, PETRI_PLACES=271, PETRI_TRANSITIONS=368} [2024-06-03 20:48:25,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-03 20:48:25,255 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 368 transitions, 4504 flow [2024-06-03 20:48:25,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:25,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:25,256 INFO 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 20:48:25,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 20:48:25,256 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 20:48:25,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:25,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1484346568, now seen corresponding path program 5 times [2024-06-03 20:48:25,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:25,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712809216] [2024-06-03 20:48:25,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:25,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:25,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:25,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712809216] [2024-06-03 20:48:25,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712809216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:25,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:25,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:25,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770407471] [2024-06-03 20:48:25,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:25,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:25,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:25,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:25,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:25,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:25,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 368 transitions, 4504 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:25,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:25,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:25,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:26,139 INFO L124 PetriNetUnfolderBase]: 2179/3741 cut-off events. [2024-06-03 20:48:26,139 INFO L125 PetriNetUnfolderBase]: For 209823/209829 co-relation queries the response was YES. [2024-06-03 20:48:26,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23290 conditions, 3741 events. 2179/3741 cut-off events. For 209823/209829 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 23954 event pairs, 419 based on Foata normal form. 5/3741 useless extension candidates. Maximal degree in co-relation 23160. Up to 3246 conditions per place. [2024-06-03 20:48:26,178 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 306 selfloop transitions, 72 changer transitions 0/385 dead transitions. [2024-06-03 20:48:26,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 385 transitions, 5302 flow [2024-06-03 20:48:26,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:26,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:26,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 20:48:26,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-03 20:48:26,179 INFO L175 Difference]: Start difference. First operand has 271 places, 368 transitions, 4504 flow. Second operand 7 states and 165 transitions. [2024-06-03 20:48:26,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 385 transitions, 5302 flow [2024-06-03 20:48:26,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 385 transitions, 4937 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:26,784 INFO L231 Difference]: Finished difference. Result has 273 places, 368 transitions, 4289 flow [2024-06-03 20:48:26,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4139, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4289, PETRI_PLACES=273, PETRI_TRANSITIONS=368} [2024-06-03 20:48:26,785 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-03 20:48:26,785 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 368 transitions, 4289 flow [2024-06-03 20:48:26,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:26,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:26,786 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] [2024-06-03 20:48:26,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 20:48:26,786 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 20:48:26,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:26,786 INFO L85 PathProgramCache]: Analyzing trace with hash -453490104, now seen corresponding path program 6 times [2024-06-03 20:48:26,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:26,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092536592] [2024-06-03 20:48:26,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:26,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:27,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:27,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:27,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092536592] [2024-06-03 20:48:27,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092536592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:27,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:27,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:27,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915112658] [2024-06-03 20:48:27,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:27,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:27,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:27,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:27,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:27,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:27,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 368 transitions, 4289 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:27,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:27,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:27,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:27,621 INFO L124 PetriNetUnfolderBase]: 2184/3732 cut-off events. [2024-06-03 20:48:27,621 INFO L125 PetriNetUnfolderBase]: For 213881/213881 co-relation queries the response was YES. [2024-06-03 20:48:27,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23136 conditions, 3732 events. 2184/3732 cut-off events. For 213881/213881 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 23818 event pairs, 447 based on Foata normal form. 1/3725 useless extension candidates. Maximal degree in co-relation 23005. Up to 3083 conditions per place. [2024-06-03 20:48:27,661 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 234 selfloop transitions, 150 changer transitions 0/391 dead transitions. [2024-06-03 20:48:27,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 391 transitions, 5419 flow [2024-06-03 20:48:27,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:27,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:27,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-03 20:48:27,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-03 20:48:27,663 INFO L175 Difference]: Start difference. First operand has 273 places, 368 transitions, 4289 flow. Second operand 8 states and 188 transitions. [2024-06-03 20:48:27,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 391 transitions, 5419 flow [2024-06-03 20:48:28,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 391 transitions, 5275 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:28,276 INFO L231 Difference]: Finished difference. Result has 275 places, 371 transitions, 4489 flow [2024-06-03 20:48:28,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4145, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4489, PETRI_PLACES=275, PETRI_TRANSITIONS=371} [2024-06-03 20:48:28,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-03 20:48:28,277 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 371 transitions, 4489 flow [2024-06-03 20:48:28,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:28,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:28,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:28,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 20:48:28,278 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 20:48:28,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:28,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1455494786, now seen corresponding path program 7 times [2024-06-03 20:48:28,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:28,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694076934] [2024-06-03 20:48:28,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:28,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:28,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:28,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694076934] [2024-06-03 20:48:28,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694076934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:28,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:28,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:28,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237750911] [2024-06-03 20:48:28,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:28,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:28,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:28,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:28,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:28,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:28,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 371 transitions, 4489 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:28,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:28,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:28,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:29,117 INFO L124 PetriNetUnfolderBase]: 2181/3740 cut-off events. [2024-06-03 20:48:29,118 INFO L125 PetriNetUnfolderBase]: For 218588/218594 co-relation queries the response was YES. [2024-06-03 20:48:29,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23363 conditions, 3740 events. 2181/3740 cut-off events. For 218588/218594 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 23987 event pairs, 443 based on Foata normal form. 5/3737 useless extension candidates. Maximal degree in co-relation 23231. Up to 3080 conditions per place. [2024-06-03 20:48:29,160 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 242 selfloop transitions, 137 changer transitions 0/386 dead transitions. [2024-06-03 20:48:29,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 386 transitions, 5423 flow [2024-06-03 20:48:29,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:29,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:29,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 20:48:29,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-03 20:48:29,162 INFO L175 Difference]: Start difference. First operand has 275 places, 371 transitions, 4489 flow. Second operand 7 states and 163 transitions. [2024-06-03 20:48:29,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 386 transitions, 5423 flow [2024-06-03 20:48:29,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 386 transitions, 5188 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:29,993 INFO L231 Difference]: Finished difference. Result has 277 places, 371 transitions, 4534 flow [2024-06-03 20:48:29,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4254, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4534, PETRI_PLACES=277, PETRI_TRANSITIONS=371} [2024-06-03 20:48:29,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-03 20:48:29,994 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 371 transitions, 4534 flow [2024-06-03 20:48:29,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:29,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:29,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:29,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 20:48:29,994 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 20:48:29,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:29,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2074942792, now seen corresponding path program 8 times [2024-06-03 20:48:29,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:29,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953733321] [2024-06-03 20:48:29,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:29,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:30,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:30,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953733321] [2024-06-03 20:48:30,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953733321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:30,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:30,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:30,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840761172] [2024-06-03 20:48:30,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:30,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:30,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:30,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:30,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:30,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:30,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 371 transitions, 4534 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:30,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:30,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:30,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:30,862 INFO L124 PetriNetUnfolderBase]: 2186/3743 cut-off events. [2024-06-03 20:48:30,862 INFO L125 PetriNetUnfolderBase]: For 224411/224411 co-relation queries the response was YES. [2024-06-03 20:48:30,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23482 conditions, 3743 events. 2186/3743 cut-off events. For 224411/224411 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 23961 event pairs, 422 based on Foata normal form. 1/3737 useless extension candidates. Maximal degree in co-relation 23348. Up to 3244 conditions per place. [2024-06-03 20:48:30,904 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 304 selfloop transitions, 78 changer transitions 0/389 dead transitions. [2024-06-03 20:48:30,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 389 transitions, 5387 flow [2024-06-03 20:48:30,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:30,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:30,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-03 20:48:30,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-03 20:48:30,905 INFO L175 Difference]: Start difference. First operand has 277 places, 371 transitions, 4534 flow. Second operand 8 states and 182 transitions. [2024-06-03 20:48:30,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 389 transitions, 5387 flow [2024-06-03 20:48:31,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 389 transitions, 4942 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:31,651 INFO L231 Difference]: Finished difference. Result has 278 places, 374 transitions, 4310 flow [2024-06-03 20:48:31,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4101, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4310, PETRI_PLACES=278, PETRI_TRANSITIONS=374} [2024-06-03 20:48:31,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-03 20:48:31,651 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 374 transitions, 4310 flow [2024-06-03 20:48:31,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:31,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:31,652 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 20:48:31,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 20:48:31,652 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 20:48:31,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:31,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1707344904, now seen corresponding path program 9 times [2024-06-03 20:48:31,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:31,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955067585] [2024-06-03 20:48:31,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:31,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:31,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:31,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955067585] [2024-06-03 20:48:31,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955067585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:31,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:31,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:31,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342135072] [2024-06-03 20:48:31,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:31,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:31,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:31,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:31,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:31,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:31,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 374 transitions, 4310 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:31,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:31,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:31,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:32,536 INFO L124 PetriNetUnfolderBase]: 2207/3790 cut-off events. [2024-06-03 20:48:32,537 INFO L125 PetriNetUnfolderBase]: For 234350/234356 co-relation queries the response was YES. [2024-06-03 20:48:32,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23619 conditions, 3790 events. 2207/3790 cut-off events. For 234350/234356 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 24345 event pairs, 419 based on Foata normal form. 5/3790 useless extension candidates. Maximal degree in co-relation 23486. Up to 3143 conditions per place. [2024-06-03 20:48:32,573 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 154 changer transitions 0/411 dead transitions. [2024-06-03 20:48:32,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 411 transitions, 5759 flow [2024-06-03 20:48:32,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:32,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:32,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-03 20:48:32,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-03 20:48:32,574 INFO L175 Difference]: Start difference. First operand has 278 places, 374 transitions, 4310 flow. Second operand 9 states and 213 transitions. [2024-06-03 20:48:32,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 411 transitions, 5759 flow [2024-06-03 20:48:33,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 411 transitions, 5581 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:33,260 INFO L231 Difference]: Finished difference. Result has 281 places, 383 transitions, 4591 flow [2024-06-03 20:48:33,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4132, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4591, PETRI_PLACES=281, PETRI_TRANSITIONS=383} [2024-06-03 20:48:33,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-03 20:48:33,261 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 383 transitions, 4591 flow [2024-06-03 20:48:33,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:33,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:33,262 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 20:48:33,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 20:48:33,262 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 20:48:33,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:33,262 INFO L85 PathProgramCache]: Analyzing trace with hash 2080038262, now seen corresponding path program 10 times [2024-06-03 20:48:33,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:33,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590423837] [2024-06-03 20:48:33,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:33,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:33,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:33,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590423837] [2024-06-03 20:48:33,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590423837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:33,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:33,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:33,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774981944] [2024-06-03 20:48:33,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:33,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:33,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:33,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:33,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:33,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:33,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 383 transitions, 4591 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:33,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:33,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:33,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:34,183 INFO L124 PetriNetUnfolderBase]: 2220/3801 cut-off events. [2024-06-03 20:48:34,183 INFO L125 PetriNetUnfolderBase]: For 243250/243250 co-relation queries the response was YES. [2024-06-03 20:48:34,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24120 conditions, 3801 events. 2220/3801 cut-off events. For 243250/243250 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24384 event pairs, 421 based on Foata normal form. 1/3795 useless extension candidates. Maximal degree in co-relation 23986. Up to 3284 conditions per place. [2024-06-03 20:48:34,226 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 316 selfloop transitions, 85 changer transitions 0/408 dead transitions. [2024-06-03 20:48:34,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 408 transitions, 5689 flow [2024-06-03 20:48:34,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:48:34,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:48:34,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-03 20:48:34,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108225108225108 [2024-06-03 20:48:34,227 INFO L175 Difference]: Start difference. First operand has 281 places, 383 transitions, 4591 flow. Second operand 11 states and 236 transitions. [2024-06-03 20:48:34,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 408 transitions, 5689 flow [2024-06-03 20:48:35,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 408 transitions, 5301 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:35,200 INFO L231 Difference]: Finished difference. Result has 286 places, 389 transitions, 4507 flow [2024-06-03 20:48:35,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4223, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4507, PETRI_PLACES=286, PETRI_TRANSITIONS=389} [2024-06-03 20:48:35,200 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-03 20:48:35,200 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 389 transitions, 4507 flow [2024-06-03 20:48:35,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:35,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:35,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:35,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 20:48:35,201 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 20:48:35,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:35,201 INFO L85 PathProgramCache]: Analyzing trace with hash -965594772, now seen corresponding path program 11 times [2024-06-03 20:48:35,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:35,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986254384] [2024-06-03 20:48:35,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:35,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:35,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:35,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:35,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986254384] [2024-06-03 20:48:35,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986254384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:35,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:35,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:35,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633964140] [2024-06-03 20:48:35,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:35,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:35,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:35,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:35,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:35,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:35,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 389 transitions, 4507 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:35,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:35,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:35,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:36,152 INFO L124 PetriNetUnfolderBase]: 2217/3797 cut-off events. [2024-06-03 20:48:36,152 INFO L125 PetriNetUnfolderBase]: For 239467/239467 co-relation queries the response was YES. [2024-06-03 20:48:36,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23755 conditions, 3797 events. 2217/3797 cut-off events. For 239467/239467 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24400 event pairs, 421 based on Foata normal form. 1/3791 useless extension candidates. Maximal degree in co-relation 23620. Up to 3281 conditions per place. [2024-06-03 20:48:36,192 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 317 selfloop transitions, 85 changer transitions 0/409 dead transitions. [2024-06-03 20:48:36,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 409 transitions, 5357 flow [2024-06-03 20:48:36,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:48:36,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:48:36,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 272 transitions. [2024-06-03 20:48:36,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981684981684982 [2024-06-03 20:48:36,193 INFO L175 Difference]: Start difference. First operand has 286 places, 389 transitions, 4507 flow. Second operand 13 states and 272 transitions. [2024-06-03 20:48:36,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 409 transitions, 5357 flow [2024-06-03 20:48:37,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 409 transitions, 5147 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-03 20:48:37,051 INFO L231 Difference]: Finished difference. Result has 291 places, 389 transitions, 4473 flow [2024-06-03 20:48:37,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4297, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4473, PETRI_PLACES=291, PETRI_TRANSITIONS=389} [2024-06-03 20:48:37,051 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-03 20:48:37,052 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 389 transitions, 4473 flow [2024-06-03 20:48:37,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:37,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:37,052 INFO 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 20:48:37,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 20:48:37,052 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 20:48:37,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:37,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1739592440, now seen corresponding path program 12 times [2024-06-03 20:48:37,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:37,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36305326] [2024-06-03 20:48:37,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:37,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:37,256 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 20:48:37,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:37,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36305326] [2024-06-03 20:48:37,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36305326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:37,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:37,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:37,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598905743] [2024-06-03 20:48:37,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:37,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:37,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:37,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:37,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:37,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:37,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 389 transitions, 4473 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:37,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:37,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:37,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:37,867 INFO L124 PetriNetUnfolderBase]: 2214/3798 cut-off events. [2024-06-03 20:48:37,867 INFO L125 PetriNetUnfolderBase]: For 243817/243823 co-relation queries the response was YES. [2024-06-03 20:48:37,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23710 conditions, 3798 events. 2214/3798 cut-off events. For 243817/243823 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24476 event pairs, 443 based on Foata normal form. 5/3795 useless extension candidates. Maximal degree in co-relation 23574. Up to 3152 conditions per place. [2024-06-03 20:48:37,915 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 261 selfloop transitions, 139 changer transitions 0/407 dead transitions. [2024-06-03 20:48:37,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 407 transitions, 5613 flow [2024-06-03 20:48:37,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:37,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:37,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 20:48:37,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-03 20:48:37,916 INFO L175 Difference]: Start difference. First operand has 291 places, 389 transitions, 4473 flow. Second operand 6 states and 148 transitions. [2024-06-03 20:48:37,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 407 transitions, 5613 flow [2024-06-03 20:48:38,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 407 transitions, 5433 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-03 20:48:38,929 INFO L231 Difference]: Finished difference. Result has 285 places, 389 transitions, 4578 flow [2024-06-03 20:48:38,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4293, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4578, PETRI_PLACES=285, PETRI_TRANSITIONS=389} [2024-06-03 20:48:38,930 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-03 20:48:38,930 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 389 transitions, 4578 flow [2024-06-03 20:48:38,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:38,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:38,931 INFO 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 20:48:38,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 20:48:38,931 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 20:48:38,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:38,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1231341504, now seen corresponding path program 13 times [2024-06-03 20:48:38,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:38,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300730572] [2024-06-03 20:48:38,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:38,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:39,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:39,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300730572] [2024-06-03 20:48:39,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300730572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:39,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:39,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:39,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786590533] [2024-06-03 20:48:39,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:39,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:39,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:39,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:39,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:39,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:39,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 389 transitions, 4578 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:39,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:39,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:39,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:39,893 INFO L124 PetriNetUnfolderBase]: 2211/3800 cut-off events. [2024-06-03 20:48:39,893 INFO L125 PetriNetUnfolderBase]: For 247155/247161 co-relation queries the response was YES. [2024-06-03 20:48:39,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23852 conditions, 3800 events. 2211/3800 cut-off events. For 247155/247161 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24511 event pairs, 419 based on Foata normal form. 5/3800 useless extension candidates. Maximal degree in co-relation 23715. Up to 3149 conditions per place. [2024-06-03 20:48:39,932 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 257 selfloop transitions, 155 changer transitions 0/419 dead transitions. [2024-06-03 20:48:39,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 419 transitions, 5926 flow [2024-06-03 20:48:39,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:39,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:39,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-03 20:48:39,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-03 20:48:39,936 INFO L175 Difference]: Start difference. First operand has 285 places, 389 transitions, 4578 flow. Second operand 8 states and 199 transitions. [2024-06-03 20:48:39,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 419 transitions, 5926 flow [2024-06-03 20:48:40,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 419 transitions, 5616 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:40,831 INFO L231 Difference]: Finished difference. Result has 289 places, 389 transitions, 4589 flow [2024-06-03 20:48:40,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4268, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4589, PETRI_PLACES=289, PETRI_TRANSITIONS=389} [2024-06-03 20:48:40,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-03 20:48:40,844 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 389 transitions, 4589 flow [2024-06-03 20:48:40,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:40,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:40,845 INFO 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 20:48:40,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 20:48:40,845 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 20:48:40,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:40,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1815232480, now seen corresponding path program 14 times [2024-06-03 20:48:40,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:40,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292884149] [2024-06-03 20:48:40,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:40,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:41,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:41,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292884149] [2024-06-03 20:48:41,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292884149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:41,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:41,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:41,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785301327] [2024-06-03 20:48:41,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:41,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:41,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:41,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:41,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:41,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:41,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 389 transitions, 4589 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:41,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:41,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:41,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:41,752 INFO L124 PetriNetUnfolderBase]: 2216/3797 cut-off events. [2024-06-03 20:48:41,752 INFO L125 PetriNetUnfolderBase]: For 252851/252851 co-relation queries the response was YES. [2024-06-03 20:48:41,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24017 conditions, 3797 events. 2216/3797 cut-off events. For 252851/252851 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24443 event pairs, 422 based on Foata normal form. 1/3791 useless extension candidates. Maximal degree in co-relation 23879. Up to 3155 conditions per place. [2024-06-03 20:48:41,800 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 158 changer transitions 0/415 dead transitions. [2024-06-03 20:48:41,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 415 transitions, 5824 flow [2024-06-03 20:48:41,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:41,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 20:48:41,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-03 20:48:41,801 INFO L175 Difference]: Start difference. First operand has 289 places, 389 transitions, 4589 flow. Second operand 8 states and 191 transitions. [2024-06-03 20:48:41,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 415 transitions, 5824 flow [2024-06-03 20:48:43,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 415 transitions, 5490 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 20:48:43,005 INFO L231 Difference]: Finished difference. Result has 289 places, 392 transitions, 4644 flow [2024-06-03 20:48:43,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4265, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4644, PETRI_PLACES=289, PETRI_TRANSITIONS=392} [2024-06-03 20:48:43,006 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-03 20:48:43,006 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 392 transitions, 4644 flow [2024-06-03 20:48:43,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:43,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:43,006 INFO 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 20:48:43,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 20:48:43,006 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 20:48:43,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:43,007 INFO L85 PathProgramCache]: Analyzing trace with hash -939411082, now seen corresponding path program 15 times [2024-06-03 20:48:43,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:43,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067708338] [2024-06-03 20:48:43,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:43,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:43,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:43,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067708338] [2024-06-03 20:48:43,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067708338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:43,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:43,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:43,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417614924] [2024-06-03 20:48:43,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:43,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:43,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:43,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:43,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:43,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:43,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 392 transitions, 4644 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:43,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:43,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:43,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:43,937 INFO L124 PetriNetUnfolderBase]: 2213/3805 cut-off events. [2024-06-03 20:48:43,938 INFO L125 PetriNetUnfolderBase]: For 250457/250463 co-relation queries the response was YES. [2024-06-03 20:48:43,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23923 conditions, 3805 events. 2213/3805 cut-off events. For 250457/250463 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24554 event pairs, 417 based on Foata normal form. 5/3805 useless extension candidates. Maximal degree in co-relation 23785. Up to 3152 conditions per place. [2024-06-03 20:48:43,976 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 249 selfloop transitions, 163 changer transitions 0/419 dead transitions. [2024-06-03 20:48:43,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 419 transitions, 5686 flow [2024-06-03 20:48:43,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:43,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:43,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-03 20:48:43,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452380952380952 [2024-06-03 20:48:43,977 INFO L175 Difference]: Start difference. First operand has 289 places, 392 transitions, 4644 flow. Second operand 10 states and 229 transitions. [2024-06-03 20:48:43,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 419 transitions, 5686 flow [2024-06-03 20:48:44,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 419 transitions, 5405 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:44,903 INFO L231 Difference]: Finished difference. Result has 294 places, 392 transitions, 4699 flow [2024-06-03 20:48:44,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4363, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4699, PETRI_PLACES=294, PETRI_TRANSITIONS=392} [2024-06-03 20:48:44,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-03 20:48:44,903 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 392 transitions, 4699 flow [2024-06-03 20:48:44,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:44,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:44,904 INFO 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 20:48:44,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 20:48:44,904 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 20:48:44,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:44,904 INFO L85 PathProgramCache]: Analyzing trace with hash -698183360, now seen corresponding path program 16 times [2024-06-03 20:48:44,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:44,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807156049] [2024-06-03 20:48:44,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:44,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:45,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:45,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807156049] [2024-06-03 20:48:45,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807156049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:45,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:45,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:45,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853314318] [2024-06-03 20:48:45,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:45,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:45,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:45,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:45,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:45,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:45,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 392 transitions, 4699 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:45,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:45,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:45,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:45,841 INFO L124 PetriNetUnfolderBase]: 2210/3790 cut-off events. [2024-06-03 20:48:45,841 INFO L125 PetriNetUnfolderBase]: For 253168/253168 co-relation queries the response was YES. [2024-06-03 20:48:45,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23914 conditions, 3790 events. 2210/3790 cut-off events. For 253168/253168 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24384 event pairs, 420 based on Foata normal form. 1/3784 useless extension candidates. Maximal degree in co-relation 23775. Up to 3149 conditions per place. [2024-06-03 20:48:45,884 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 161 changer transitions 0/418 dead transitions. [2024-06-03 20:48:45,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 418 transitions, 5891 flow [2024-06-03 20:48:45,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:48:45,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:48:45,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-03 20:48:45,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324675324675324 [2024-06-03 20:48:45,886 INFO L175 Difference]: Start difference. First operand has 294 places, 392 transitions, 4699 flow. Second operand 11 states and 246 transitions. [2024-06-03 20:48:45,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 418 transitions, 5891 flow [2024-06-03 20:48:46,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 418 transitions, 5513 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-03 20:48:46,980 INFO L231 Difference]: Finished difference. Result has 296 places, 392 transitions, 4657 flow [2024-06-03 20:48:46,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4325, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4657, PETRI_PLACES=296, PETRI_TRANSITIONS=392} [2024-06-03 20:48:46,981 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-03 20:48:46,981 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 392 transitions, 4657 flow [2024-06-03 20:48:46,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:46,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:46,981 INFO 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 20:48:46,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 20:48:46,981 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 20:48:46,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:46,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1178603092, now seen corresponding path program 17 times [2024-06-03 20:48:46,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:46,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875393349] [2024-06-03 20:48:46,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:46,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:47,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:47,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:47,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875393349] [2024-06-03 20:48:47,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875393349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:47,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:47,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:47,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554666761] [2024-06-03 20:48:47,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:47,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:47,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:47,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:47,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:47,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:47,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 392 transitions, 4657 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:47,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:47,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:47,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:47,903 INFO L124 PetriNetUnfolderBase]: 2207/3786 cut-off events. [2024-06-03 20:48:47,903 INFO L125 PetriNetUnfolderBase]: For 249779/249779 co-relation queries the response was YES. [2024-06-03 20:48:47,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23768 conditions, 3786 events. 2207/3786 cut-off events. For 249779/249779 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24381 event pairs, 420 based on Foata normal form. 1/3780 useless extension candidates. Maximal degree in co-relation 23628. Up to 3146 conditions per place. [2024-06-03 20:48:47,946 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 161 changer transitions 0/419 dead transitions. [2024-06-03 20:48:47,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 419 transitions, 5699 flow [2024-06-03 20:48:47,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:48:47,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:48:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 282 transitions. [2024-06-03 20:48:47,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164835164835165 [2024-06-03 20:48:47,947 INFO L175 Difference]: Start difference. First operand has 296 places, 392 transitions, 4657 flow. Second operand 13 states and 282 transitions. [2024-06-03 20:48:47,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 419 transitions, 5699 flow [2024-06-03 20:48:49,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 419 transitions, 5392 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:49,162 INFO L231 Difference]: Finished difference. Result has 302 places, 392 transitions, 4684 flow [2024-06-03 20:48:49,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4352, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4684, PETRI_PLACES=302, PETRI_TRANSITIONS=392} [2024-06-03 20:48:49,162 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-03 20:48:49,162 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 392 transitions, 4684 flow [2024-06-03 20:48:49,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:49,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:49,163 INFO 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 20:48:49,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 20:48:49,163 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 20:48:49,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:49,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2014267360, now seen corresponding path program 18 times [2024-06-03 20:48:49,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:49,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940007318] [2024-06-03 20:48:49,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:49,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:49,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:49,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940007318] [2024-06-03 20:48:49,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940007318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:49,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:49,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:49,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270113065] [2024-06-03 20:48:49,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:49,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:49,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:49,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:49,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:49,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:49,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 392 transitions, 4684 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:49,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:49,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:49,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:49,993 INFO L124 PetriNetUnfolderBase]: 2204/3791 cut-off events. [2024-06-03 20:48:49,994 INFO L125 PetriNetUnfolderBase]: For 246084/246084 co-relation queries the response was YES. [2024-06-03 20:48:50,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23674 conditions, 3791 events. 2204/3791 cut-off events. For 246084/246084 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24402 event pairs, 398 based on Foata normal form. 1/3789 useless extension candidates. Maximal degree in co-relation 23533. Up to 3288 conditions per place. [2024-06-03 20:48:50,041 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 350 selfloop transitions, 59 changer transitions 0/416 dead transitions. [2024-06-03 20:48:50,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 416 transitions, 5741 flow [2024-06-03 20:48:50,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:50,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:50,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-03 20:48:50,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-03 20:48:50,042 INFO L175 Difference]: Start difference. First operand has 302 places, 392 transitions, 4684 flow. Second operand 6 states and 156 transitions. [2024-06-03 20:48:50,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 416 transitions, 5741 flow [2024-06-03 20:48:50,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 416 transitions, 5369 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-06-03 20:48:50,872 INFO L231 Difference]: Finished difference. Result has 296 places, 393 transitions, 4505 flow [2024-06-03 20:48:50,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4316, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4505, PETRI_PLACES=296, PETRI_TRANSITIONS=393} [2024-06-03 20:48:50,873 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-03 20:48:50,873 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 393 transitions, 4505 flow [2024-06-03 20:48:50,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:50,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:50,873 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 20:48:50,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 20:48:50,873 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 20:48:50,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:50,874 INFO L85 PathProgramCache]: Analyzing trace with hash -346395850, now seen corresponding path program 19 times [2024-06-03 20:48:50,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:50,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133186837] [2024-06-03 20:48:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:50,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:51,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:51,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133186837] [2024-06-03 20:48:51,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133186837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:51,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:51,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:51,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670475797] [2024-06-03 20:48:51,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:51,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:51,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:51,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:51,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:51,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:51,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 393 transitions, 4505 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:51,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:51,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:51,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:51,725 INFO L124 PetriNetUnfolderBase]: 2201/3787 cut-off events. [2024-06-03 20:48:51,726 INFO L125 PetriNetUnfolderBase]: For 242669/242669 co-relation queries the response was YES. [2024-06-03 20:48:51,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23390 conditions, 3787 events. 2201/3787 cut-off events. For 242669/242669 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24382 event pairs, 398 based on Foata normal form. 1/3785 useless extension candidates. Maximal degree in co-relation 23248. Up to 3285 conditions per place. [2024-06-03 20:48:51,768 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 352 selfloop transitions, 56 changer transitions 0/415 dead transitions. [2024-06-03 20:48:51,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 415 transitions, 5377 flow [2024-06-03 20:48:51,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:51,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:51,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-03 20:48:51,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-03 20:48:51,769 INFO L175 Difference]: Start difference. First operand has 296 places, 393 transitions, 4505 flow. Second operand 6 states and 154 transitions. [2024-06-03 20:48:51,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 415 transitions, 5377 flow [2024-06-03 20:48:52,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 415 transitions, 5157 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:52,682 INFO L231 Difference]: Finished difference. Result has 296 places, 393 transitions, 4411 flow [2024-06-03 20:48:52,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4285, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4411, PETRI_PLACES=296, PETRI_TRANSITIONS=393} [2024-06-03 20:48:52,682 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-03 20:48:52,683 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 393 transitions, 4411 flow [2024-06-03 20:48:52,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:52,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:52,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:52,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 20:48:52,683 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 20:48:52,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:52,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1106909654, now seen corresponding path program 1 times [2024-06-03 20:48:52,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:52,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136382341] [2024-06-03 20:48:52,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:52,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:52,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:52,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136382341] [2024-06-03 20:48:52,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136382341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:52,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:52,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:52,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478201730] [2024-06-03 20:48:52,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:52,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:52,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:52,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:52,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:52,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:52,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 393 transitions, 4411 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:52,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:52,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:52,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:53,567 INFO L124 PetriNetUnfolderBase]: 2320/3971 cut-off events. [2024-06-03 20:48:53,568 INFO L125 PetriNetUnfolderBase]: For 321467/321467 co-relation queries the response was YES. [2024-06-03 20:48:53,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25682 conditions, 3971 events. 2320/3971 cut-off events. For 321467/321467 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 25710 event pairs, 443 based on Foata normal form. 12/3975 useless extension candidates. Maximal degree in co-relation 25539. Up to 2982 conditions per place. [2024-06-03 20:48:53,615 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 185 changer transitions 0/427 dead transitions. [2024-06-03 20:48:53,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 427 transitions, 5599 flow [2024-06-03 20:48:53,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:53,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:53,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 20:48:53,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 20:48:53,617 INFO L175 Difference]: Start difference. First operand has 296 places, 393 transitions, 4411 flow. Second operand 8 states and 196 transitions. [2024-06-03 20:48:53,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 427 transitions, 5599 flow [2024-06-03 20:48:54,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 427 transitions, 5385 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:54,695 INFO L231 Difference]: Finished difference. Result has 297 places, 397 transitions, 4676 flow [2024-06-03 20:48:54,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4197, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4676, PETRI_PLACES=297, PETRI_TRANSITIONS=397} [2024-06-03 20:48:54,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-03 20:48:54,696 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 397 transitions, 4676 flow [2024-06-03 20:48:54,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:54,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:54,696 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 20:48:54,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 20:48:54,697 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 20:48:54,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:54,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1018196024, now seen corresponding path program 2 times [2024-06-03 20:48:54,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:54,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233972654] [2024-06-03 20:48:54,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:54,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:54,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:54,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233972654] [2024-06-03 20:48:54,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233972654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:54,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:54,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:54,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821717579] [2024-06-03 20:48:54,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:54,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:54,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:54,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:54,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:54,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:54,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 397 transitions, 4676 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:54,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:54,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:54,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:55,621 INFO L124 PetriNetUnfolderBase]: 2376/4062 cut-off events. [2024-06-03 20:48:55,622 INFO L125 PetriNetUnfolderBase]: For 345766/345766 co-relation queries the response was YES. [2024-06-03 20:48:55,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26830 conditions, 4062 events. 2376/4062 cut-off events. For 345766/345766 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 26359 event pairs, 506 based on Foata normal form. 16/4070 useless extension candidates. Maximal degree in co-relation 26687. Up to 3316 conditions per place. [2024-06-03 20:48:55,670 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 173 changer transitions 0/421 dead transitions. [2024-06-03 20:48:55,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 421 transitions, 5626 flow [2024-06-03 20:48:55,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:55,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:55,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-03 20:48:55,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-03 20:48:55,671 INFO L175 Difference]: Start difference. First operand has 297 places, 397 transitions, 4676 flow. Second operand 8 states and 189 transitions. [2024-06-03 20:48:55,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 421 transitions, 5626 flow [2024-06-03 20:48:56,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 421 transitions, 5369 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:56,541 INFO L231 Difference]: Finished difference. Result has 301 places, 399 transitions, 4829 flow [2024-06-03 20:48:56,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4425, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4829, PETRI_PLACES=301, PETRI_TRANSITIONS=399} [2024-06-03 20:48:56,541 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-03 20:48:56,541 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 399 transitions, 4829 flow [2024-06-03 20:48:56,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:56,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:56,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:56,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 20:48:56,542 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 20:48:56,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:56,542 INFO L85 PathProgramCache]: Analyzing trace with hash -250154076, now seen corresponding path program 3 times [2024-06-03 20:48:56,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:56,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585927763] [2024-06-03 20:48:56,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:56,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:56,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:56,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585927763] [2024-06-03 20:48:56,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585927763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:56,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:56,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:56,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896166279] [2024-06-03 20:48:56,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:56,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:56,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:56,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:56,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:56,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:56,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 399 transitions, 4829 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:56,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:56,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:56,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:57,477 INFO L124 PetriNetUnfolderBase]: 2416/4126 cut-off events. [2024-06-03 20:48:57,477 INFO L125 PetriNetUnfolderBase]: For 340893/340893 co-relation queries the response was YES. [2024-06-03 20:48:57,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27490 conditions, 4126 events. 2416/4126 cut-off events. For 340893/340893 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26851 event pairs, 502 based on Foata normal form. 12/4130 useless extension candidates. Maximal degree in co-relation 27345. Up to 3320 conditions per place. [2024-06-03 20:48:57,528 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 242 selfloop transitions, 177 changer transitions 0/426 dead transitions. [2024-06-03 20:48:57,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 426 transitions, 5801 flow [2024-06-03 20:48:57,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:57,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:57,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 20:48:57,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:48:57,529 INFO L175 Difference]: Start difference. First operand has 301 places, 399 transitions, 4829 flow. Second operand 8 states and 192 transitions. [2024-06-03 20:48:57,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 426 transitions, 5801 flow [2024-06-03 20:48:58,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 426 transitions, 5433 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:58,691 INFO L231 Difference]: Finished difference. Result has 303 places, 401 transitions, 4876 flow [2024-06-03 20:48:58,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4461, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4876, PETRI_PLACES=303, PETRI_TRANSITIONS=401} [2024-06-03 20:48:58,692 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-03 20:48:58,692 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 401 transitions, 4876 flow [2024-06-03 20:48:58,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:58,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:58,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:58,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 20:48:58,693 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 20:48:58,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:58,693 INFO L85 PathProgramCache]: Analyzing trace with hash -970947232, now seen corresponding path program 4 times [2024-06-03 20:48:58,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:58,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209284118] [2024-06-03 20:48:58,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:58,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:58,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:58,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209284118] [2024-06-03 20:48:58,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209284118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:58,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:58,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:58,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878623594] [2024-06-03 20:48:58,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:58,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:58,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:58,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:58,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:58,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:48:58,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 401 transitions, 4876 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:58,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:58,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:48:58,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:59,628 INFO L124 PetriNetUnfolderBase]: 2472/4230 cut-off events. [2024-06-03 20:48:59,628 INFO L125 PetriNetUnfolderBase]: For 363179/363179 co-relation queries the response was YES. [2024-06-03 20:48:59,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28160 conditions, 4230 events. 2472/4230 cut-off events. For 363179/363179 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 27720 event pairs, 493 based on Foata normal form. 16/4239 useless extension candidates. Maximal degree in co-relation 28014. Up to 3630 conditions per place. [2024-06-03 20:48:59,681 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 337 selfloop transitions, 78 changer transitions 0/422 dead transitions. [2024-06-03 20:48:59,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 422 transitions, 5822 flow [2024-06-03 20:48:59,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:59,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:59,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-03 20:48:59,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2024-06-03 20:48:59,682 INFO L175 Difference]: Start difference. First operand has 303 places, 401 transitions, 4876 flow. Second operand 8 states and 185 transitions. [2024-06-03 20:48:59,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 422 transitions, 5822 flow [2024-06-03 20:49:01,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 422 transitions, 5435 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:01,032 INFO L231 Difference]: Finished difference. Result has 305 places, 403 transitions, 4711 flow [2024-06-03 20:49:01,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4489, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4711, PETRI_PLACES=305, PETRI_TRANSITIONS=403} [2024-06-03 20:49:01,032 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-03 20:49:01,033 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 403 transitions, 4711 flow [2024-06-03 20:49:01,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:01,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:01,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:01,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 20:49:01,033 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 20:49:01,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:01,033 INFO L85 PathProgramCache]: Analyzing trace with hash -971095102, now seen corresponding path program 5 times [2024-06-03 20:49:01,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:01,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668831129] [2024-06-03 20:49:01,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:01,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:01,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:01,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668831129] [2024-06-03 20:49:01,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668831129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:01,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:01,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:01,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548194569] [2024-06-03 20:49:01,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:01,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:01,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:01,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:01,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:01,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:01,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 403 transitions, 4711 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:01,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:01,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:01,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:02,059 INFO L124 PetriNetUnfolderBase]: 2604/4434 cut-off events. [2024-06-03 20:49:02,060 INFO L125 PetriNetUnfolderBase]: For 415377/415377 co-relation queries the response was YES. [2024-06-03 20:49:02,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30693 conditions, 4434 events. 2604/4434 cut-off events. For 415377/415377 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 29124 event pairs, 513 based on Foata normal form. 12/4439 useless extension candidates. Maximal degree in co-relation 30546. Up to 3674 conditions per place. [2024-06-03 20:49:02,118 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 339 selfloop transitions, 84 changer transitions 0/430 dead transitions. [2024-06-03 20:49:02,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 430 transitions, 5915 flow [2024-06-03 20:49:02,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:02,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:02,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-03 20:49:02,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-03 20:49:02,119 INFO L175 Difference]: Start difference. First operand has 305 places, 403 transitions, 4711 flow. Second operand 8 states and 188 transitions. [2024-06-03 20:49:02,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 430 transitions, 5915 flow [2024-06-03 20:49:03,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 430 transitions, 5729 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:03,430 INFO L231 Difference]: Finished difference. Result has 307 places, 407 transitions, 4822 flow [2024-06-03 20:49:03,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4525, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4822, PETRI_PLACES=307, PETRI_TRANSITIONS=407} [2024-06-03 20:49:03,431 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-03 20:49:03,431 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 407 transitions, 4822 flow [2024-06-03 20:49:03,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:03,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:03,431 INFO 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 20:49:03,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 20:49:03,432 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 20:49:03,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:03,432 INFO L85 PathProgramCache]: Analyzing trace with hash -965584852, now seen corresponding path program 6 times [2024-06-03 20:49:03,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:03,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490458573] [2024-06-03 20:49:03,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:03,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:03,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:03,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490458573] [2024-06-03 20:49:03,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490458573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:03,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:03,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:03,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617553883] [2024-06-03 20:49:03,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:03,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:03,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:03,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:03,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:03,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:03,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 407 transitions, 4822 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:03,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:03,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:03,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:04,440 INFO L124 PetriNetUnfolderBase]: 2568/4382 cut-off events. [2024-06-03 20:49:04,441 INFO L125 PetriNetUnfolderBase]: For 383203/383203 co-relation queries the response was YES. [2024-06-03 20:49:04,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29003 conditions, 4382 events. 2568/4382 cut-off events. For 383203/383203 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 28780 event pairs, 509 based on Foata normal form. 16/4391 useless extension candidates. Maximal degree in co-relation 28855. Up to 3782 conditions per place. [2024-06-03 20:49:04,495 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 342 selfloop transitions, 79 changer transitions 0/428 dead transitions. [2024-06-03 20:49:04,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 428 transitions, 5728 flow [2024-06-03 20:49:04,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:49:04,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:49:04,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-03 20:49:04,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261904761904762 [2024-06-03 20:49:04,497 INFO L175 Difference]: Start difference. First operand has 307 places, 407 transitions, 4822 flow. Second operand 10 states and 221 transitions. [2024-06-03 20:49:04,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 428 transitions, 5728 flow [2024-06-03 20:49:05,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 428 transitions, 5561 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-03 20:49:05,901 INFO L231 Difference]: Finished difference. Result has 313 places, 407 transitions, 4819 flow [2024-06-03 20:49:05,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4655, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4819, PETRI_PLACES=313, PETRI_TRANSITIONS=407} [2024-06-03 20:49:05,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-03 20:49:05,902 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 407 transitions, 4819 flow [2024-06-03 20:49:05,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:05,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:05,902 INFO 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 20:49:05,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 20:49:05,902 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 20:49:05,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:05,903 INFO L85 PathProgramCache]: Analyzing trace with hash -965369650, now seen corresponding path program 1 times [2024-06-03 20:49:05,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:05,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761324404] [2024-06-03 20:49:05,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:05,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:06,151 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 20:49:06,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:06,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761324404] [2024-06-03 20:49:06,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761324404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:06,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:06,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:06,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33836704] [2024-06-03 20:49:06,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:06,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:06,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:06,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:06,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:06,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:06,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 407 transitions, 4819 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:06,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:06,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:06,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:06,979 INFO L124 PetriNetUnfolderBase]: 2608/4454 cut-off events. [2024-06-03 20:49:06,979 INFO L125 PetriNetUnfolderBase]: For 374214/374214 co-relation queries the response was YES. [2024-06-03 20:49:07,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29305 conditions, 4454 events. 2608/4454 cut-off events. For 374214/374214 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 29365 event pairs, 511 based on Foata normal form. 12/4459 useless extension candidates. Maximal degree in co-relation 29155. Up to 3722 conditions per place. [2024-06-03 20:49:07,035 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 340 selfloop transitions, 86 changer transitions 0/433 dead transitions. [2024-06-03 20:49:07,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 433 transitions, 5803 flow [2024-06-03 20:49:07,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:49:07,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:49:07,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-03 20:49:07,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.530952380952381 [2024-06-03 20:49:07,037 INFO L175 Difference]: Start difference. First operand has 313 places, 407 transitions, 4819 flow. Second operand 10 states and 223 transitions. [2024-06-03 20:49:07,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 433 transitions, 5803 flow [2024-06-03 20:49:08,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 433 transitions, 5629 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-03 20:49:08,404 INFO L231 Difference]: Finished difference. Result has 314 places, 409 transitions, 4880 flow [2024-06-03 20:49:08,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4645, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4880, PETRI_PLACES=314, PETRI_TRANSITIONS=409} [2024-06-03 20:49:08,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-03 20:49:08,405 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 409 transitions, 4880 flow [2024-06-03 20:49:08,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:08,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:08,405 INFO 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 20:49:08,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 20:49:08,406 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 20:49:08,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:08,406 INFO L85 PathProgramCache]: Analyzing trace with hash -346385930, now seen corresponding path program 7 times [2024-06-03 20:49:08,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:08,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072022186] [2024-06-03 20:49:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:08,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:08,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:08,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072022186] [2024-06-03 20:49:08,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072022186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:08,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:08,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:08,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472829797] [2024-06-03 20:49:08,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:08,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:08,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:08,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:08,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:08,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:08,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 409 transitions, 4880 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:08,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:08,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:08,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:09,488 INFO L124 PetriNetUnfolderBase]: 2672/4571 cut-off events. [2024-06-03 20:49:09,489 INFO L125 PetriNetUnfolderBase]: For 399350/399350 co-relation queries the response was YES. [2024-06-03 20:49:09,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30262 conditions, 4571 events. 2672/4571 cut-off events. For 399350/399350 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 30284 event pairs, 452 based on Foata normal form. 16/4584 useless extension candidates. Maximal degree in co-relation 30111. Up to 3914 conditions per place. [2024-06-03 20:49:09,549 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 369 selfloop transitions, 67 changer transitions 0/443 dead transitions. [2024-06-03 20:49:09,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 443 transitions, 5924 flow [2024-06-03 20:49:09,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:49:09,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:49:09,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-03 20:49:09,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-03 20:49:09,551 INFO L175 Difference]: Start difference. First operand has 314 places, 409 transitions, 4880 flow. Second operand 7 states and 181 transitions. [2024-06-03 20:49:09,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 443 transitions, 5924 flow [2024-06-03 20:49:10,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 443 transitions, 5715 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-03 20:49:10,940 INFO L231 Difference]: Finished difference. Result has 313 places, 413 transitions, 4909 flow [2024-06-03 20:49:10,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4671, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4909, PETRI_PLACES=313, PETRI_TRANSITIONS=413} [2024-06-03 20:49:10,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-03 20:49:10,941 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 413 transitions, 4909 flow [2024-06-03 20:49:10,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:10,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:10,941 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] [2024-06-03 20:49:10,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 20:49:10,942 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 20:49:10,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:10,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1178613012, now seen corresponding path program 8 times [2024-06-03 20:49:10,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:10,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620819254] [2024-06-03 20:49:10,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:10,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:11,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:11,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620819254] [2024-06-03 20:49:11,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620819254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:11,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:11,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:11,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629064689] [2024-06-03 20:49:11,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:11,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:11,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:11,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:11,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:11,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:11,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 413 transitions, 4909 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:11,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:11,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:11,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:12,044 INFO L124 PetriNetUnfolderBase]: 2728/4642 cut-off events. [2024-06-03 20:49:12,044 INFO L125 PetriNetUnfolderBase]: For 412348/412348 co-relation queries the response was YES. [2024-06-03 20:49:12,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30934 conditions, 4642 events. 2728/4642 cut-off events. For 412348/412348 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 30802 event pairs, 539 based on Foata normal form. 16/4651 useless extension candidates. Maximal degree in co-relation 30782. Up to 3841 conditions per place. [2024-06-03 20:49:12,099 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 269 selfloop transitions, 166 changer transitions 0/442 dead transitions. [2024-06-03 20:49:12,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 442 transitions, 5927 flow [2024-06-03 20:49:12,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:49:12,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:49:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-03 20:49:12,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:49:12,101 INFO L175 Difference]: Start difference. First operand has 313 places, 413 transitions, 4909 flow. Second operand 10 states and 230 transitions. [2024-06-03 20:49:12,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 442 transitions, 5927 flow [2024-06-03 20:49:13,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 442 transitions, 5783 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 20:49:13,453 INFO L231 Difference]: Finished difference. Result has 319 places, 415 transitions, 5179 flow [2024-06-03 20:49:13,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4765, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5179, PETRI_PLACES=319, PETRI_TRANSITIONS=415} [2024-06-03 20:49:13,453 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-03 20:49:13,453 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 415 transitions, 5179 flow [2024-06-03 20:49:13,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:13,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:13,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:13,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 20:49:13,454 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 20:49:13,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:13,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1173106482, now seen corresponding path program 9 times [2024-06-03 20:49:13,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:13,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602945232] [2024-06-03 20:49:13,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:13,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:13,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:13,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:13,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602945232] [2024-06-03 20:49:13,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602945232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:13,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:13,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:13,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053881895] [2024-06-03 20:49:13,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:13,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:13,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:13,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:13,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:13,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:13,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 415 transitions, 5179 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:13,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:13,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:13,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:14,491 INFO L124 PetriNetUnfolderBase]: 2771/4715 cut-off events. [2024-06-03 20:49:14,492 INFO L125 PetriNetUnfolderBase]: For 416005/416005 co-relation queries the response was YES. [2024-06-03 20:49:14,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31579 conditions, 4715 events. 2771/4715 cut-off events. For 416005/416005 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 31352 event pairs, 548 based on Foata normal form. 16/4724 useless extension candidates. Maximal degree in co-relation 31426. Up to 3910 conditions per place. [2024-06-03 20:49:14,553 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 272 selfloop transitions, 163 changer transitions 0/442 dead transitions. [2024-06-03 20:49:14,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 442 transitions, 6197 flow [2024-06-03 20:49:14,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:14,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 20:49:14,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:49:14,554 INFO L175 Difference]: Start difference. First operand has 319 places, 415 transitions, 5179 flow. Second operand 8 states and 192 transitions. [2024-06-03 20:49:14,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 442 transitions, 6197 flow [2024-06-03 20:49:16,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 442 transitions, 5825 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-03 20:49:16,072 INFO L231 Difference]: Finished difference. Result has 318 places, 417 transitions, 5219 flow [2024-06-03 20:49:16,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4807, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5219, PETRI_PLACES=318, PETRI_TRANSITIONS=417} [2024-06-03 20:49:16,073 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-03 20:49:16,073 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 417 transitions, 5219 flow [2024-06-03 20:49:16,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:16,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:16,073 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] [2024-06-03 20:49:16,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 20:49:16,074 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 20:49:16,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:16,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1815094530, now seen corresponding path program 10 times [2024-06-03 20:49:16,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:16,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787256478] [2024-06-03 20:49:16,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:16,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:16,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:16,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787256478] [2024-06-03 20:49:16,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787256478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:16,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:16,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:16,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204324242] [2024-06-03 20:49:16,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:16,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:16,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:16,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:16,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:16,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:16,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 417 transitions, 5219 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:16,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:16,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:16,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:17,126 INFO L124 PetriNetUnfolderBase]: 2778/4737 cut-off events. [2024-06-03 20:49:17,126 INFO L125 PetriNetUnfolderBase]: For 378885/378885 co-relation queries the response was YES. [2024-06-03 20:49:17,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30994 conditions, 4737 events. 2778/4737 cut-off events. For 378885/378885 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 31583 event pairs, 470 based on Foata normal form. 12/4742 useless extension candidates. Maximal degree in co-relation 30841. Up to 3511 conditions per place. [2024-06-03 20:49:17,184 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 261 selfloop transitions, 182 changer transitions 0/450 dead transitions. [2024-06-03 20:49:17,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 450 transitions, 6419 flow [2024-06-03 20:49:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:17,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:17,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-03 20:49:17,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-03 20:49:17,186 INFO L175 Difference]: Start difference. First operand has 318 places, 417 transitions, 5219 flow. Second operand 8 states and 199 transitions. [2024-06-03 20:49:17,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 450 transitions, 6419 flow [2024-06-03 20:49:18,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 450 transitions, 6049 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:18,622 INFO L231 Difference]: Finished difference. Result has 320 places, 418 transitions, 5266 flow [2024-06-03 20:49:18,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4853, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5266, PETRI_PLACES=320, PETRI_TRANSITIONS=418} [2024-06-03 20:49:18,623 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-03 20:49:18,623 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 418 transitions, 5266 flow [2024-06-03 20:49:18,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:18,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:18,623 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] [2024-06-03 20:49:18,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 20:49:18,624 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 20:49:18,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:18,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1820819982, now seen corresponding path program 2 times [2024-06-03 20:49:18,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:18,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515990279] [2024-06-03 20:49:18,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:18,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:18,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:18,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515990279] [2024-06-03 20:49:18,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515990279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:18,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:18,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:18,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266433125] [2024-06-03 20:49:18,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:18,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:18,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:18,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:18,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:18,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:18,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 418 transitions, 5266 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:18,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:18,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:18,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:19,699 INFO L124 PetriNetUnfolderBase]: 2818/4804 cut-off events. [2024-06-03 20:49:19,699 INFO L125 PetriNetUnfolderBase]: For 377861/377861 co-relation queries the response was YES. [2024-06-03 20:49:19,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31388 conditions, 4804 events. 2818/4804 cut-off events. For 377861/377861 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 32032 event pairs, 535 based on Foata normal form. 12/4809 useless extension candidates. Maximal degree in co-relation 31234. Up to 3739 conditions per place. [2024-06-03 20:49:19,896 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 263 selfloop transitions, 180 changer transitions 0/450 dead transitions. [2024-06-03 20:49:19,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 450 transitions, 6304 flow [2024-06-03 20:49:19,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:49:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:49:19,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-03 20:49:19,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2024-06-03 20:49:19,898 INFO L175 Difference]: Start difference. First operand has 320 places, 418 transitions, 5266 flow. Second operand 10 states and 232 transitions. [2024-06-03 20:49:19,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 450 transitions, 6304 flow [2024-06-03 20:49:21,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 450 transitions, 5872 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-03 20:49:21,605 INFO L231 Difference]: Finished difference. Result has 322 places, 420 transitions, 5264 flow [2024-06-03 20:49:21,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4834, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5264, PETRI_PLACES=322, PETRI_TRANSITIONS=420} [2024-06-03 20:49:21,606 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-03 20:49:21,606 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 420 transitions, 5264 flow [2024-06-03 20:49:21,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:21,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:21,606 INFO 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 20:49:21,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 20:49:21,606 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 20:49:21,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:21,607 INFO L85 PathProgramCache]: Analyzing trace with hash -89670218, now seen corresponding path program 3 times [2024-06-03 20:49:21,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:21,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253538249] [2024-06-03 20:49:21,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:21,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:21,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:21,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253538249] [2024-06-03 20:49:21,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253538249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:21,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:21,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:21,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550129746] [2024-06-03 20:49:21,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:21,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:21,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:21,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:21,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:21,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:21,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 420 transitions, 5264 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:21,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:21,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:21,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:22,673 INFO L124 PetriNetUnfolderBase]: 2858/4889 cut-off events. [2024-06-03 20:49:22,674 INFO L125 PetriNetUnfolderBase]: For 375465/375465 co-relation queries the response was YES. [2024-06-03 20:49:22,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31554 conditions, 4889 events. 2858/4889 cut-off events. For 375465/375465 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 32773 event pairs, 476 based on Foata normal form. 12/4898 useless extension candidates. Maximal degree in co-relation 31401. Up to 4152 conditions per place. [2024-06-03 20:49:22,737 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 376 selfloop transitions, 69 changer transitions 0/452 dead transitions. [2024-06-03 20:49:22,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 452 transitions, 6312 flow [2024-06-03 20:49:22,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:49:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:49:22,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-03 20:49:22,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-03 20:49:22,739 INFO L175 Difference]: Start difference. First operand has 322 places, 420 transitions, 5264 flow. Second operand 7 states and 179 transitions. [2024-06-03 20:49:22,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 452 transitions, 6312 flow [2024-06-03 20:49:24,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 452 transitions, 5908 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-03 20:49:24,030 INFO L231 Difference]: Finished difference. Result has 321 places, 422 transitions, 5069 flow [2024-06-03 20:49:24,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4864, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5069, PETRI_PLACES=321, PETRI_TRANSITIONS=422} [2024-06-03 20:49:24,030 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-03 20:49:24,030 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 422 transitions, 5069 flow [2024-06-03 20:49:24,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:24,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:24,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:24,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 20:49:24,031 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 20:49:24,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:24,031 INFO L85 PathProgramCache]: Analyzing trace with hash -80473448, now seen corresponding path program 4 times [2024-06-03 20:49:24,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:24,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656840097] [2024-06-03 20:49:24,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:24,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:24,256 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 20:49:24,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:24,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656840097] [2024-06-03 20:49:24,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656840097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:24,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:24,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:24,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124952012] [2024-06-03 20:49:24,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:24,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:24,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:24,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:24,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:24,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:24,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 422 transitions, 5069 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:24,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:24,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:24,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:25,116 INFO L124 PetriNetUnfolderBase]: 2924/5001 cut-off events. [2024-06-03 20:49:25,116 INFO L125 PetriNetUnfolderBase]: For 392248/392248 co-relation queries the response was YES. [2024-06-03 20:49:25,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32280 conditions, 5001 events. 2924/5001 cut-off events. For 392248/392248 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 33667 event pairs, 457 based on Foata normal form. 12/5010 useless extension candidates. Maximal degree in co-relation 32126. Up to 3972 conditions per place. [2024-06-03 20:49:25,180 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 375 selfloop transitions, 72 changer transitions 0/454 dead transitions. [2024-06-03 20:49:25,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 454 transitions, 6315 flow [2024-06-03 20:49:25,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:49:25,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:49:25,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 20:49:25,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-03 20:49:25,181 INFO L175 Difference]: Start difference. First operand has 321 places, 422 transitions, 5069 flow. Second operand 7 states and 176 transitions. [2024-06-03 20:49:25,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 454 transitions, 6315 flow [2024-06-03 20:49:26,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 454 transitions, 6136 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 20:49:26,439 INFO L231 Difference]: Finished difference. Result has 324 places, 425 transitions, 5168 flow [2024-06-03 20:49:26,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4890, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5168, PETRI_PLACES=324, PETRI_TRANSITIONS=425} [2024-06-03 20:49:26,440 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-03 20:49:26,440 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 425 transitions, 5168 flow [2024-06-03 20:49:26,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:26,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:26,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:26,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 20:49:26,441 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 20:49:26,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:26,441 INFO L85 PathProgramCache]: Analyzing trace with hash -163199762, now seen corresponding path program 1 times [2024-06-03 20:49:26,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:26,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728877886] [2024-06-03 20:49:26,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:26,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:26,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:26,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728877886] [2024-06-03 20:49:26,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728877886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:26,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:26,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:26,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036390368] [2024-06-03 20:49:26,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:26,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:26,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:26,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:26,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:26,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:26,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 425 transitions, 5168 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:26,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:26,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:26,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:27,548 INFO L124 PetriNetUnfolderBase]: 2945/5027 cut-off events. [2024-06-03 20:49:27,548 INFO L125 PetriNetUnfolderBase]: For 367529/367535 co-relation queries the response was YES. [2024-06-03 20:49:27,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32786 conditions, 5027 events. 2945/5027 cut-off events. For 367529/367535 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 33880 event pairs, 587 based on Foata normal form. 1/5021 useless extension candidates. Maximal degree in co-relation 32630. Up to 4244 conditions per place. [2024-06-03 20:49:27,612 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 353 selfloop transitions, 114 changer transitions 0/474 dead transitions. [2024-06-03 20:49:27,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 474 transitions, 6860 flow [2024-06-03 20:49:27,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:27,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:27,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-03 20:49:27,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58994708994709 [2024-06-03 20:49:27,614 INFO L175 Difference]: Start difference. First operand has 324 places, 425 transitions, 5168 flow. Second operand 9 states and 223 transitions. [2024-06-03 20:49:27,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 474 transitions, 6860 flow [2024-06-03 20:49:29,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 474 transitions, 6732 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-03 20:49:29,217 INFO L231 Difference]: Finished difference. Result has 329 places, 437 transitions, 5424 flow [2024-06-03 20:49:29,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5040, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5424, PETRI_PLACES=329, PETRI_TRANSITIONS=437} [2024-06-03 20:49:29,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-03 20:49:29,218 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 437 transitions, 5424 flow [2024-06-03 20:49:29,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:29,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:29,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:29,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 20:49:29,218 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 20:49:29,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:29,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1040982994, now seen corresponding path program 2 times [2024-06-03 20:49:29,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:29,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705786647] [2024-06-03 20:49:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:29,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:29,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:29,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705786647] [2024-06-03 20:49:29,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705786647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:29,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:29,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:29,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774758297] [2024-06-03 20:49:29,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:29,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:29,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:29,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:29,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:29,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:29,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 437 transitions, 5424 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:29,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:29,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:29,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:30,382 INFO L124 PetriNetUnfolderBase]: 2955/5045 cut-off events. [2024-06-03 20:49:30,383 INFO L125 PetriNetUnfolderBase]: For 374209/374215 co-relation queries the response was YES. [2024-06-03 20:49:30,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33357 conditions, 5045 events. 2955/5045 cut-off events. For 374209/374215 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 34046 event pairs, 572 based on Foata normal form. 5/5045 useless extension candidates. Maximal degree in co-relation 33200. Up to 4442 conditions per place. [2024-06-03 20:49:30,449 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 403 selfloop transitions, 64 changer transitions 0/474 dead transitions. [2024-06-03 20:49:30,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 474 transitions, 6517 flow [2024-06-03 20:49:30,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:30,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:30,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-03 20:49:30,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608465608465608 [2024-06-03 20:49:30,450 INFO L175 Difference]: Start difference. First operand has 329 places, 437 transitions, 5424 flow. Second operand 9 states and 212 transitions. [2024-06-03 20:49:30,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 474 transitions, 6517 flow [2024-06-03 20:49:31,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 474 transitions, 6317 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-03 20:49:32,003 INFO L231 Difference]: Finished difference. Result has 335 places, 443 transitions, 5445 flow [2024-06-03 20:49:32,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5249, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5445, PETRI_PLACES=335, PETRI_TRANSITIONS=443} [2024-06-03 20:49:32,004 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-03 20:49:32,004 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 443 transitions, 5445 flow [2024-06-03 20:49:32,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:32,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:32,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:32,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 20:49:32,004 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 20:49:32,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:32,005 INFO L85 PathProgramCache]: Analyzing trace with hash -163079606, now seen corresponding path program 1 times [2024-06-03 20:49:32,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:32,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564006067] [2024-06-03 20:49:32,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:32,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:32,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:32,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564006067] [2024-06-03 20:49:32,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564006067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:32,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:32,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:32,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449955197] [2024-06-03 20:49:32,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:32,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:32,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:32,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:32,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:32,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:32,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 443 transitions, 5445 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:32,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:32,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:32,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:33,160 INFO L124 PetriNetUnfolderBase]: 2976/5078 cut-off events. [2024-06-03 20:49:33,161 INFO L125 PetriNetUnfolderBase]: For 381722/381728 co-relation queries the response was YES. [2024-06-03 20:49:33,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33756 conditions, 5078 events. 2976/5078 cut-off events. For 381722/381728 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 34278 event pairs, 580 based on Foata normal form. 5/5078 useless extension candidates. Maximal degree in co-relation 33597. Up to 4340 conditions per place. [2024-06-03 20:49:33,227 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 350 selfloop transitions, 129 changer transitions 0/486 dead transitions. [2024-06-03 20:49:33,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 486 transitions, 7111 flow [2024-06-03 20:49:33,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:33,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:33,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-03 20:49:33,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582010582010582 [2024-06-03 20:49:33,228 INFO L175 Difference]: Start difference. First operand has 335 places, 443 transitions, 5445 flow. Second operand 9 states and 220 transitions. [2024-06-03 20:49:33,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 486 transitions, 7111 flow [2024-06-03 20:49:34,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 486 transitions, 6975 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:34,812 INFO L231 Difference]: Finished difference. Result has 338 places, 452 transitions, 5669 flow [2024-06-03 20:49:34,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5309, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5669, PETRI_PLACES=338, PETRI_TRANSITIONS=452} [2024-06-03 20:49:34,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-03 20:49:34,813 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 452 transitions, 5669 flow [2024-06-03 20:49:34,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:34,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:34,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:34,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 20:49:34,813 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 20:49:34,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:34,814 INFO L85 PathProgramCache]: Analyzing trace with hash -275307424, now seen corresponding path program 2 times [2024-06-03 20:49:34,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:34,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103219036] [2024-06-03 20:49:34,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:34,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:35,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:35,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103219036] [2024-06-03 20:49:35,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103219036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:35,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:35,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:35,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079906518] [2024-06-03 20:49:35,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:35,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:35,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:35,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:35,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:35,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:35,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 452 transitions, 5669 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:35,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:35,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:35,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:36,009 INFO L124 PetriNetUnfolderBase]: 2994/5103 cut-off events. [2024-06-03 20:49:36,010 INFO L125 PetriNetUnfolderBase]: For 394068/394074 co-relation queries the response was YES. [2024-06-03 20:49:36,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34282 conditions, 5103 events. 2994/5103 cut-off events. For 394068/394074 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 34430 event pairs, 580 based on Foata normal form. 5/5103 useless extension candidates. Maximal degree in co-relation 34122. Up to 4359 conditions per place. [2024-06-03 20:49:36,081 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 353 selfloop transitions, 138 changer transitions 0/498 dead transitions. [2024-06-03 20:49:36,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 498 transitions, 7569 flow [2024-06-03 20:49:36,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:49:36,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:49:36,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 261 transitions. [2024-06-03 20:49:36,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564935064935065 [2024-06-03 20:49:36,083 INFO L175 Difference]: Start difference. First operand has 338 places, 452 transitions, 5669 flow. Second operand 11 states and 261 transitions. [2024-06-03 20:49:36,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 498 transitions, 7569 flow [2024-06-03 20:49:38,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 498 transitions, 7271 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:38,019 INFO L231 Difference]: Finished difference. Result has 344 places, 461 transitions, 5779 flow [2024-06-03 20:49:38,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5387, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5779, PETRI_PLACES=344, PETRI_TRANSITIONS=461} [2024-06-03 20:49:38,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-03 20:49:38,020 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 461 transitions, 5779 flow [2024-06-03 20:49:38,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:38,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:38,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:38,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 20:49:38,020 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 20:49:38,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:38,021 INFO L85 PathProgramCache]: Analyzing trace with hash -447790804, now seen corresponding path program 3 times [2024-06-03 20:49:38,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:38,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255356544] [2024-06-03 20:49:38,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:38,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:38,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:38,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255356544] [2024-06-03 20:49:38,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255356544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:38,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:38,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:38,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090646307] [2024-06-03 20:49:38,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:38,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:38,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:38,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:38,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:38,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:38,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 461 transitions, 5779 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:38,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:38,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:38,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:39,240 INFO L124 PetriNetUnfolderBase]: 2991/5101 cut-off events. [2024-06-03 20:49:39,240 INFO L125 PetriNetUnfolderBase]: For 398132/398138 co-relation queries the response was YES. [2024-06-03 20:49:39,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34262 conditions, 5101 events. 2991/5101 cut-off events. For 398132/398138 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 34500 event pairs, 580 based on Foata normal form. 5/5101 useless extension candidates. Maximal degree in co-relation 34100. Up to 4356 conditions per place. [2024-06-03 20:49:39,309 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 347 selfloop transitions, 137 changer transitions 0/491 dead transitions. [2024-06-03 20:49:39,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 491 transitions, 7181 flow [2024-06-03 20:49:39,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:39,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:39,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-03 20:49:39,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:49:39,311 INFO L175 Difference]: Start difference. First operand has 344 places, 461 transitions, 5779 flow. Second operand 9 states and 216 transitions. [2024-06-03 20:49:39,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 491 transitions, 7181 flow [2024-06-03 20:49:41,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 491 transitions, 6875 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-03 20:49:41,211 INFO L231 Difference]: Finished difference. Result has 345 places, 461 transitions, 5753 flow [2024-06-03 20:49:41,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5473, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5753, PETRI_PLACES=345, PETRI_TRANSITIONS=461} [2024-06-03 20:49:41,211 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-03 20:49:41,211 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 461 transitions, 5753 flow [2024-06-03 20:49:41,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:41,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:41,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:41,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 20:49:41,213 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 20:49:41,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:41,213 INFO L85 PathProgramCache]: Analyzing trace with hash -275307610, now seen corresponding path program 3 times [2024-06-03 20:49:41,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:41,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041392108] [2024-06-03 20:49:41,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:41,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:41,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:41,492 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 20:49:41,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:41,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041392108] [2024-06-03 20:49:41,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041392108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:41,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:41,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:49:41,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196539946] [2024-06-03 20:49:41,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:41,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:49:41,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:41,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:49:41,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:49:41,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:41,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 461 transitions, 5753 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:41,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:41,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:41,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:42,449 INFO L124 PetriNetUnfolderBase]: 3004/5121 cut-off events. [2024-06-03 20:49:42,450 INFO L125 PetriNetUnfolderBase]: For 410218/410224 co-relation queries the response was YES. [2024-06-03 20:49:42,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34510 conditions, 5121 events. 3004/5121 cut-off events. For 410218/410224 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 34608 event pairs, 571 based on Foata normal form. 5/5121 useless extension candidates. Maximal degree in co-relation 34347. Up to 4502 conditions per place. [2024-06-03 20:49:42,523 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 421 selfloop transitions, 74 changer transitions 0/502 dead transitions. [2024-06-03 20:49:42,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 502 transitions, 7065 flow [2024-06-03 20:49:42,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:49:42,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:49:42,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 268 transitions. [2024-06-03 20:49:42,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-03 20:49:42,525 INFO L175 Difference]: Start difference. First operand has 345 places, 461 transitions, 5753 flow. Second operand 12 states and 268 transitions. [2024-06-03 20:49:42,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 502 transitions, 7065 flow [2024-06-03 20:49:44,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 502 transitions, 6783 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 20:49:44,554 INFO L231 Difference]: Finished difference. Result has 351 places, 467 transitions, 5699 flow [2024-06-03 20:49:44,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5471, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5699, PETRI_PLACES=351, PETRI_TRANSITIONS=467} [2024-06-03 20:49:44,554 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-03 20:49:44,554 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 467 transitions, 5699 flow [2024-06-03 20:49:44,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:44,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:44,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:44,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 20:49:44,555 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 20:49:44,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:44,555 INFO L85 PathProgramCache]: Analyzing trace with hash 654435596, now seen corresponding path program 4 times [2024-06-03 20:49:44,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:44,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457751936] [2024-06-03 20:49:44,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:44,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:44,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:44,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457751936] [2024-06-03 20:49:44,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457751936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:44,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:44,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:44,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51478969] [2024-06-03 20:49:44,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:44,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:44,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:44,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:44,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:44,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:44,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 467 transitions, 5699 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:44,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:44,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:44,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:45,864 INFO L124 PetriNetUnfolderBase]: 3017/5125 cut-off events. [2024-06-03 20:49:45,864 INFO L125 PetriNetUnfolderBase]: For 421694/421694 co-relation queries the response was YES. [2024-06-03 20:49:45,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34621 conditions, 5125 events. 3017/5125 cut-off events. For 421694/421694 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 34582 event pairs, 590 based on Foata normal form. 1/5118 useless extension candidates. Maximal degree in co-relation 34456. Up to 4476 conditions per place. [2024-06-03 20:49:45,924 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 403 selfloop transitions, 93 changer transitions 0/503 dead transitions. [2024-06-03 20:49:45,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 503 transitions, 7185 flow [2024-06-03 20:49:45,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:45,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:45,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-03 20:49:45,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-03 20:49:45,925 INFO L175 Difference]: Start difference. First operand has 351 places, 467 transitions, 5699 flow. Second operand 9 states and 213 transitions. [2024-06-03 20:49:45,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 503 transitions, 7185 flow [2024-06-03 20:49:47,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 503 transitions, 7002 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-03 20:49:47,911 INFO L231 Difference]: Finished difference. Result has 350 places, 473 transitions, 5760 flow [2024-06-03 20:49:47,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5516, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5760, PETRI_PLACES=350, PETRI_TRANSITIONS=473} [2024-06-03 20:49:47,912 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-03 20:49:47,912 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 473 transitions, 5760 flow [2024-06-03 20:49:47,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:47,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:47,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:47,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 20:49:47,912 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 20:49:47,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:47,913 INFO L85 PathProgramCache]: Analyzing trace with hash 634300144, now seen corresponding path program 5 times [2024-06-03 20:49:47,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:47,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517224745] [2024-06-03 20:49:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:47,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:48,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:48,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517224745] [2024-06-03 20:49:48,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517224745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:48,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:48,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:48,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918122981] [2024-06-03 20:49:48,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:48,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:48,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:48,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:48,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:48,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:48,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 473 transitions, 5760 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:48,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:48,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:48,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:49,098 INFO L124 PetriNetUnfolderBase]: 3030/5149 cut-off events. [2024-06-03 20:49:49,099 INFO L125 PetriNetUnfolderBase]: For 434546/434546 co-relation queries the response was YES. [2024-06-03 20:49:49,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34922 conditions, 5149 events. 3030/5149 cut-off events. For 434546/434546 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 34793 event pairs, 590 based on Foata normal form. 1/5142 useless extension candidates. Maximal degree in co-relation 34757. Up to 4346 conditions per place. [2024-06-03 20:49:49,167 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 358 selfloop transitions, 150 changer transitions 0/515 dead transitions. [2024-06-03 20:49:49,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 515 transitions, 7486 flow [2024-06-03 20:49:49,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:49:49,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:49:49,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 256 transitions. [2024-06-03 20:49:49,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541125541125541 [2024-06-03 20:49:49,169 INFO L175 Difference]: Start difference. First operand has 350 places, 473 transitions, 5760 flow. Second operand 11 states and 256 transitions. [2024-06-03 20:49:49,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 515 transitions, 7486 flow [2024-06-03 20:49:51,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 515 transitions, 7247 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:51,430 INFO L231 Difference]: Finished difference. Result has 355 places, 479 transitions, 5891 flow [2024-06-03 20:49:51,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5545, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5891, PETRI_PLACES=355, PETRI_TRANSITIONS=479} [2024-06-03 20:49:51,430 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-03 20:49:51,431 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 479 transitions, 5891 flow [2024-06-03 20:49:51,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:51,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:51,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:51,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 20:49:51,431 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 20:49:51,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:51,432 INFO L85 PathProgramCache]: Analyzing trace with hash 738337384, now seen corresponding path program 6 times [2024-06-03 20:49:51,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:51,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582550079] [2024-06-03 20:49:51,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:51,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:51,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:51,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582550079] [2024-06-03 20:49:51,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582550079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:51,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:51,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:51,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950477958] [2024-06-03 20:49:51,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:51,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:51,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:51,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:51,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:51,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:51,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 479 transitions, 5891 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:51,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:51,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:51,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:52,538 INFO L124 PetriNetUnfolderBase]: 3027/5143 cut-off events. [2024-06-03 20:49:52,538 INFO L125 PetriNetUnfolderBase]: For 439098/439098 co-relation queries the response was YES. [2024-06-03 20:49:52,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35027 conditions, 5143 events. 3027/5143 cut-off events. For 439098/439098 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 34746 event pairs, 590 based on Foata normal form. 1/5136 useless extension candidates. Maximal degree in co-relation 34861. Up to 4343 conditions per place. [2024-06-03 20:49:52,608 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 368 selfloop transitions, 139 changer transitions 0/514 dead transitions. [2024-06-03 20:49:52,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 514 transitions, 7743 flow [2024-06-03 20:49:52,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:52,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:52,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-03 20:49:52,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-03 20:49:52,610 INFO L175 Difference]: Start difference. First operand has 355 places, 479 transitions, 5891 flow. Second operand 9 states and 222 transitions. [2024-06-03 20:49:52,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 514 transitions, 7743 flow [2024-06-03 20:49:54,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 514 transitions, 7477 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 20:49:54,836 INFO L231 Difference]: Finished difference. Result has 357 places, 479 transitions, 5909 flow [2024-06-03 20:49:54,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5625, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5909, PETRI_PLACES=357, PETRI_TRANSITIONS=479} [2024-06-03 20:49:54,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-03 20:49:54,837 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 479 transitions, 5909 flow [2024-06-03 20:49:54,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:54,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:54,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:54,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 20:49:54,838 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 20:49:54,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:54,838 INFO L85 PathProgramCache]: Analyzing trace with hash 424642990, now seen corresponding path program 4 times [2024-06-03 20:49:54,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:54,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729397472] [2024-06-03 20:49:54,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:54,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:55,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:55,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729397472] [2024-06-03 20:49:55,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729397472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:55,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:55,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:55,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679429626] [2024-06-03 20:49:55,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:55,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:55,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:55,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:55,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:55,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:55,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 479 transitions, 5909 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:55,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:55,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:55,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:56,038 INFO L124 PetriNetUnfolderBase]: 3037/5165 cut-off events. [2024-06-03 20:49:56,038 INFO L125 PetriNetUnfolderBase]: For 447929/447929 co-relation queries the response was YES. [2024-06-03 20:49:56,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35209 conditions, 5165 events. 3037/5165 cut-off events. For 447929/447929 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 34937 event pairs, 583 based on Foata normal form. 1/5159 useless extension candidates. Maximal degree in co-relation 35042. Up to 4416 conditions per place. [2024-06-03 20:49:56,101 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 367 selfloop transitions, 142 changer transitions 0/516 dead transitions. [2024-06-03 20:49:56,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 516 transitions, 7644 flow [2024-06-03 20:49:56,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:56,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:56,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-03 20:49:56,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-03 20:49:56,102 INFO L175 Difference]: Start difference. First operand has 357 places, 479 transitions, 5909 flow. Second operand 9 states and 217 transitions. [2024-06-03 20:49:56,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 516 transitions, 7644 flow [2024-06-03 20:49:58,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 516 transitions, 7350 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 20:49:58,306 INFO L231 Difference]: Finished difference. Result has 359 places, 485 transitions, 5982 flow [2024-06-03 20:49:58,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5621, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5982, PETRI_PLACES=359, PETRI_TRANSITIONS=485} [2024-06-03 20:49:58,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-03 20:49:58,307 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 485 transitions, 5982 flow [2024-06-03 20:49:58,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:58,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:58,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:58,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 20:49:58,307 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 20:49:58,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:58,308 INFO L85 PathProgramCache]: Analyzing trace with hash 424642804, now seen corresponding path program 7 times [2024-06-03 20:49:58,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:58,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356823160] [2024-06-03 20:49:58,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:58,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:58,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:58,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:58,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356823160] [2024-06-03 20:49:58,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356823160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:58,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:58,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:58,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958562879] [2024-06-03 20:49:58,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:58,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:58,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:58,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:58,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:58,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:49:58,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 485 transitions, 5982 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:58,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:58,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:49:58,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:59,511 INFO L124 PetriNetUnfolderBase]: 3042/5175 cut-off events. [2024-06-03 20:49:59,511 INFO L125 PetriNetUnfolderBase]: For 456335/456335 co-relation queries the response was YES. [2024-06-03 20:49:59,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35324 conditions, 5175 events. 3042/5175 cut-off events. For 456335/456335 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 35062 event pairs, 574 based on Foata normal form. 1/5169 useless extension candidates. Maximal degree in co-relation 35155. Up to 4561 conditions per place. [2024-06-03 20:49:59,584 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 439 selfloop transitions, 70 changer transitions 0/516 dead transitions. [2024-06-03 20:49:59,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 516 transitions, 7093 flow [2024-06-03 20:49:59,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:59,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:59,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-03 20:49:59,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5529100529100529 [2024-06-03 20:49:59,585 INFO L175 Difference]: Start difference. First operand has 359 places, 485 transitions, 5982 flow. Second operand 9 states and 209 transitions. [2024-06-03 20:49:59,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 516 transitions, 7093 flow [2024-06-03 20:50:02,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 516 transitions, 6791 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-03 20:50:02,302 INFO L231 Difference]: Finished difference. Result has 362 places, 488 transitions, 5855 flow [2024-06-03 20:50:02,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5680, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5855, PETRI_PLACES=362, PETRI_TRANSITIONS=488} [2024-06-03 20:50:02,302 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-03 20:50:02,303 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 488 transitions, 5855 flow [2024-06-03 20:50:02,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:02,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:02,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:02,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 20:50:02,303 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 20:50:02,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:02,304 INFO L85 PathProgramCache]: Analyzing trace with hash 749770060, now seen corresponding path program 5 times [2024-06-03 20:50:02,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:02,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480209855] [2024-06-03 20:50:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:02,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:02,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:02,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:02,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480209855] [2024-06-03 20:50:02,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480209855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:02,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:02,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:02,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438828968] [2024-06-03 20:50:02,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:02,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:02,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:02,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:02,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:02,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:02,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 488 transitions, 5855 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:02,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:02,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:02,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:03,462 INFO L124 PetriNetUnfolderBase]: 3060/5205 cut-off events. [2024-06-03 20:50:03,463 INFO L125 PetriNetUnfolderBase]: For 469505/469505 co-relation queries the response was YES. [2024-06-03 20:50:03,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35476 conditions, 5205 events. 3060/5205 cut-off events. For 469505/469505 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 35263 event pairs, 583 based on Foata normal form. 1/5199 useless extension candidates. Maximal degree in co-relation 35306. Up to 4442 conditions per place. [2024-06-03 20:50:03,540 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 365 selfloop transitions, 155 changer transitions 0/527 dead transitions. [2024-06-03 20:50:03,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 527 transitions, 7652 flow [2024-06-03 20:50:03,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:50:03,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:50:03,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-03 20:50:03,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5411255411255411 [2024-06-03 20:50:03,542 INFO L175 Difference]: Start difference. First operand has 362 places, 488 transitions, 5855 flow. Second operand 11 states and 250 transitions. [2024-06-03 20:50:03,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 527 transitions, 7652 flow [2024-06-03 20:50:06,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 527 transitions, 7492 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 20:50:06,360 INFO L231 Difference]: Finished difference. Result has 366 places, 497 transitions, 6128 flow [2024-06-03 20:50:06,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5703, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6128, PETRI_PLACES=366, PETRI_TRANSITIONS=497} [2024-06-03 20:50:06,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-03 20:50:06,361 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 497 transitions, 6128 flow [2024-06-03 20:50:06,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:06,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:06,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:06,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 20:50:06,362 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 20:50:06,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:06,362 INFO L85 PathProgramCache]: Analyzing trace with hash 749591314, now seen corresponding path program 8 times [2024-06-03 20:50:06,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:06,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731619927] [2024-06-03 20:50:06,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:06,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:06,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:06,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:06,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731619927] [2024-06-03 20:50:06,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731619927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:06,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:06,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:06,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388413059] [2024-06-03 20:50:06,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:06,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:06,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:06,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:06,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:06,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:06,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 497 transitions, 6128 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:06,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:06,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:06,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:07,752 INFO L124 PetriNetUnfolderBase]: 3073/5228 cut-off events. [2024-06-03 20:50:07,752 INFO L125 PetriNetUnfolderBase]: For 483654/483654 co-relation queries the response was YES. [2024-06-03 20:50:07,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35982 conditions, 5228 events. 3073/5228 cut-off events. For 483654/483654 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35427 event pairs, 574 based on Foata normal form. 1/5222 useless extension candidates. Maximal degree in co-relation 35811. Up to 4587 conditions per place. [2024-06-03 20:50:07,832 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 435 selfloop transitions, 88 changer transitions 0/530 dead transitions. [2024-06-03 20:50:07,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 530 transitions, 7488 flow [2024-06-03 20:50:07,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:50:07,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:50:07,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-03 20:50:07,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404761904761904 [2024-06-03 20:50:07,833 INFO L175 Difference]: Start difference. First operand has 366 places, 497 transitions, 6128 flow. Second operand 10 states and 227 transitions. [2024-06-03 20:50:07,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 530 transitions, 7488 flow [2024-06-03 20:50:09,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 530 transitions, 7219 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 20:50:09,656 INFO L231 Difference]: Finished difference. Result has 371 places, 503 transitions, 6122 flow [2024-06-03 20:50:09,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5859, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6122, PETRI_PLACES=371, PETRI_TRANSITIONS=503} [2024-06-03 20:50:09,657 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-03 20:50:09,657 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 503 transitions, 6122 flow [2024-06-03 20:50:09,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:09,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:09,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:09,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 20:50:09,658 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 20:50:09,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:09,658 INFO L85 PathProgramCache]: Analyzing trace with hash 749384110, now seen corresponding path program 6 times [2024-06-03 20:50:09,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:09,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477524665] [2024-06-03 20:50:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:09,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:09,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:09,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477524665] [2024-06-03 20:50:09,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477524665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:09,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:09,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:09,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441314312] [2024-06-03 20:50:09,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:09,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:09,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:09,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:09,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:09,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:09,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 503 transitions, 6122 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:09,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:09,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:09,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:10,848 INFO L124 PetriNetUnfolderBase]: 3070/5223 cut-off events. [2024-06-03 20:50:10,848 INFO L125 PetriNetUnfolderBase]: For 487804/487804 co-relation queries the response was YES. [2024-06-03 20:50:10,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35853 conditions, 5223 events. 3070/5223 cut-off events. For 487804/487804 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35398 event pairs, 583 based on Foata normal form. 1/5217 useless extension candidates. Maximal degree in co-relation 35680. Up to 4457 conditions per place. [2024-06-03 20:50:10,924 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 372 selfloop transitions, 152 changer transitions 0/531 dead transitions. [2024-06-03 20:50:10,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 531 transitions, 7634 flow [2024-06-03 20:50:10,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:50:10,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:50:10,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-03 20:50:10,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547619047619048 [2024-06-03 20:50:10,926 INFO L175 Difference]: Start difference. First operand has 371 places, 503 transitions, 6122 flow. Second operand 10 states and 233 transitions. [2024-06-03 20:50:10,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 531 transitions, 7634 flow [2024-06-03 20:50:13,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 531 transitions, 7469 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 20:50:13,294 INFO L231 Difference]: Finished difference. Result has 374 places, 503 transitions, 6267 flow [2024-06-03 20:50:13,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5957, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6267, PETRI_PLACES=374, PETRI_TRANSITIONS=503} [2024-06-03 20:50:13,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-03 20:50:13,295 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 503 transitions, 6267 flow [2024-06-03 20:50:13,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:13,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:13,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:13,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 20:50:13,295 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 20:50:13,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:13,296 INFO L85 PathProgramCache]: Analyzing trace with hash 749383924, now seen corresponding path program 9 times [2024-06-03 20:50:13,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:13,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909703546] [2024-06-03 20:50:13,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:13,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:13,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:13,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909703546] [2024-06-03 20:50:13,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909703546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:13,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:13,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:13,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721126572] [2024-06-03 20:50:13,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:13,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:13,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:13,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:13,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:13,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:13,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 503 transitions, 6267 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:13,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:13,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:13,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:14,516 INFO L124 PetriNetUnfolderBase]: 3067/5220 cut-off events. [2024-06-03 20:50:14,516 INFO L125 PetriNetUnfolderBase]: For 492564/492564 co-relation queries the response was YES. [2024-06-03 20:50:14,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35995 conditions, 5220 events. 3067/5220 cut-off events. For 492564/492564 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35470 event pairs, 574 based on Foata normal form. 1/5214 useless extension candidates. Maximal degree in co-relation 35822. Up to 4580 conditions per place. [2024-06-03 20:50:14,591 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 436 selfloop transitions, 88 changer transitions 0/531 dead transitions. [2024-06-03 20:50:14,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 531 transitions, 7383 flow [2024-06-03 20:50:14,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:50:14,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:50:14,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-06-03 20:50:14,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198412698412699 [2024-06-03 20:50:14,592 INFO L175 Difference]: Start difference. First operand has 374 places, 503 transitions, 6267 flow. Second operand 12 states and 262 transitions. [2024-06-03 20:50:14,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 531 transitions, 7383 flow [2024-06-03 20:50:16,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 531 transitions, 7075 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 20:50:16,991 INFO L231 Difference]: Finished difference. Result has 378 places, 503 transitions, 6141 flow [2024-06-03 20:50:16,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5959, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6141, PETRI_PLACES=378, PETRI_TRANSITIONS=503} [2024-06-03 20:50:16,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-03 20:50:16,992 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 503 transitions, 6141 flow [2024-06-03 20:50:16,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:16,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:16,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:16,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 20:50:16,992 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 20:50:16,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:16,993 INFO L85 PathProgramCache]: Analyzing trace with hash -61539774, now seen corresponding path program 7 times [2024-06-03 20:50:16,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:16,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798905306] [2024-06-03 20:50:16,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:16,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:17,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:17,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798905306] [2024-06-03 20:50:17,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798905306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:17,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:17,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:50:17,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095139754] [2024-06-03 20:50:17,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:17,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:50:17,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:17,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:50:17,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:50:17,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:17,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 503 transitions, 6141 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:17,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:17,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:17,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:18,288 INFO L124 PetriNetUnfolderBase]: 3080/5253 cut-off events. [2024-06-03 20:50:18,289 INFO L125 PetriNetUnfolderBase]: For 507550/507556 co-relation queries the response was YES. [2024-06-03 20:50:18,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36131 conditions, 5253 events. 3080/5253 cut-off events. For 507550/507556 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 35696 event pairs, 579 based on Foata normal form. 5/5253 useless extension candidates. Maximal degree in co-relation 35957. Up to 4547 conditions per place. [2024-06-03 20:50:18,361 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 416 selfloop transitions, 116 changer transitions 0/539 dead transitions. [2024-06-03 20:50:18,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 539 transitions, 7749 flow [2024-06-03 20:50:18,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:50:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:50:18,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 267 transitions. [2024-06-03 20:50:18,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-06-03 20:50:18,362 INFO L175 Difference]: Start difference. First operand has 378 places, 503 transitions, 6141 flow. Second operand 12 states and 267 transitions. [2024-06-03 20:50:18,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 539 transitions, 7749 flow [2024-06-03 20:50:20,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 539 transitions, 7538 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-03 20:50:20,705 INFO L231 Difference]: Finished difference. Result has 379 places, 509 transitions, 6257 flow [2024-06-03 20:50:20,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5930, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6257, PETRI_PLACES=379, PETRI_TRANSITIONS=509} [2024-06-03 20:50:20,706 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-03 20:50:20,706 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 509 transitions, 6257 flow [2024-06-03 20:50:20,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:20,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:20,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:20,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 20:50:20,707 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 20:50:20,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:20,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1814130350, now seen corresponding path program 8 times [2024-06-03 20:50:20,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:20,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661832754] [2024-06-03 20:50:20,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:20,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:20,949 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 20:50:20,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:20,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661832754] [2024-06-03 20:50:20,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661832754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:20,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:20,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:50:20,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783599168] [2024-06-03 20:50:20,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:20,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:50:20,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:20,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:50:20,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:50:21,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:21,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 509 transitions, 6257 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:21,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:21,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:21,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:21,956 INFO L124 PetriNetUnfolderBase]: 3090/5267 cut-off events. [2024-06-03 20:50:21,956 INFO L125 PetriNetUnfolderBase]: For 517219/517225 co-relation queries the response was YES. [2024-06-03 20:50:22,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36433 conditions, 5267 events. 3090/5267 cut-off events. For 517219/517225 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 35864 event pairs, 580 based on Foata normal form. 5/5267 useless extension candidates. Maximal degree in co-relation 36257. Up to 4478 conditions per place. [2024-06-03 20:50:22,031 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 379 selfloop transitions, 162 changer transitions 0/548 dead transitions. [2024-06-03 20:50:22,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 548 transitions, 8114 flow [2024-06-03 20:50:22,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:50:22,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:50:22,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 258 transitions. [2024-06-03 20:50:22,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-03 20:50:22,032 INFO L175 Difference]: Start difference. First operand has 379 places, 509 transitions, 6257 flow. Second operand 11 states and 258 transitions. [2024-06-03 20:50:22,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 548 transitions, 8114 flow [2024-06-03 20:50:25,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 548 transitions, 7863 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-03 20:50:25,105 INFO L231 Difference]: Finished difference. Result has 382 places, 515 transitions, 6430 flow [2024-06-03 20:50:25,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6006, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6430, PETRI_PLACES=382, PETRI_TRANSITIONS=515} [2024-06-03 20:50:25,105 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-03 20:50:25,105 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 515 transitions, 6430 flow [2024-06-03 20:50:25,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:25,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:25,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:25,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 20:50:25,106 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 20:50:25,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:25,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1360568612, now seen corresponding path program 9 times [2024-06-03 20:50:25,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:25,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097378816] [2024-06-03 20:50:25,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:25,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:25,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:25,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097378816] [2024-06-03 20:50:25,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097378816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:25,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:25,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:50:25,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641911834] [2024-06-03 20:50:25,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:25,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:50:25,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:25,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:50:25,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:50:25,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:25,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 515 transitions, 6430 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:25,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:25,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:25,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:26,323 INFO L124 PetriNetUnfolderBase]: 3095/5274 cut-off events. [2024-06-03 20:50:26,323 INFO L125 PetriNetUnfolderBase]: For 526969/526975 co-relation queries the response was YES. [2024-06-03 20:50:26,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36673 conditions, 5274 events. 3095/5274 cut-off events. For 526969/526975 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 35836 event pairs, 580 based on Foata normal form. 5/5274 useless extension candidates. Maximal degree in co-relation 36495. Up to 4484 conditions per place. [2024-06-03 20:50:26,397 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 377 selfloop transitions, 167 changer transitions 0/551 dead transitions. [2024-06-03 20:50:26,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 551 transitions, 8046 flow [2024-06-03 20:50:26,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:50:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:50:26,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 273 transitions. [2024-06-03 20:50:26,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-03 20:50:26,398 INFO L175 Difference]: Start difference. First operand has 382 places, 515 transitions, 6430 flow. Second operand 12 states and 273 transitions. [2024-06-03 20:50:26,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 551 transitions, 8046 flow [2024-06-03 20:50:29,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 551 transitions, 7767 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 20:50:29,154 INFO L231 Difference]: Finished difference. Result has 387 places, 518 transitions, 6527 flow [2024-06-03 20:50:29,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6154, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6527, PETRI_PLACES=387, PETRI_TRANSITIONS=518} [2024-06-03 20:50:29,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-03 20:50:29,155 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 518 transitions, 6527 flow [2024-06-03 20:50:29,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:29,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:29,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:29,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 20:50:29,156 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 20:50:29,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:29,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1442107224, now seen corresponding path program 10 times [2024-06-03 20:50:29,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:29,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304460908] [2024-06-03 20:50:29,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:29,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:29,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:29,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304460908] [2024-06-03 20:50:29,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304460908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:29,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:29,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:50:29,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889897896] [2024-06-03 20:50:29,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:29,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:50:29,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:29,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:50:29,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:50:29,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:29,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 518 transitions, 6527 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:29,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:29,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:29,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:30,515 INFO L124 PetriNetUnfolderBase]: 3092/5270 cut-off events. [2024-06-03 20:50:30,515 INFO L125 PetriNetUnfolderBase]: For 531383/531389 co-relation queries the response was YES. [2024-06-03 20:50:30,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36671 conditions, 5270 events. 3092/5270 cut-off events. For 531383/531389 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 35855 event pairs, 580 based on Foata normal form. 5/5270 useless extension candidates. Maximal degree in co-relation 36492. Up to 4481 conditions per place. [2024-06-03 20:50:30,581 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 378 selfloop transitions, 165 changer transitions 0/550 dead transitions. [2024-06-03 20:50:30,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 550 transitions, 8107 flow [2024-06-03 20:50:30,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:50:30,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:50:30,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 257 transitions. [2024-06-03 20:50:30,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5562770562770563 [2024-06-03 20:50:30,583 INFO L175 Difference]: Start difference. First operand has 387 places, 518 transitions, 6527 flow. Second operand 11 states and 257 transitions. [2024-06-03 20:50:30,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 550 transitions, 8107 flow [2024-06-03 20:50:33,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 550 transitions, 7840 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-03 20:50:33,413 INFO L231 Difference]: Finished difference. Result has 389 places, 518 transitions, 6596 flow [2024-06-03 20:50:33,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6260, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6596, PETRI_PLACES=389, PETRI_TRANSITIONS=518} [2024-06-03 20:50:33,414 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-03 20:50:33,414 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 518 transitions, 6596 flow [2024-06-03 20:50:33,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:33,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:33,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:33,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 20:50:33,415 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 20:50:33,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:33,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1731703898, now seen corresponding path program 10 times [2024-06-03 20:50:33,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:33,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310692012] [2024-06-03 20:50:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:33,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:33,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:33,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:33,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310692012] [2024-06-03 20:50:33,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310692012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:33,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:33,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:50:33,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723447722] [2024-06-03 20:50:33,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:33,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:50:33,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:33,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:50:33,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:50:33,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:33,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 518 transitions, 6596 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:33,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:33,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:33,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:34,774 INFO L124 PetriNetUnfolderBase]: 3105/5292 cut-off events. [2024-06-03 20:50:34,774 INFO L125 PetriNetUnfolderBase]: For 546924/546930 co-relation queries the response was YES. [2024-06-03 20:50:34,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37006 conditions, 5292 events. 3105/5292 cut-off events. For 546924/546930 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 35981 event pairs, 571 based on Foata normal form. 5/5292 useless extension candidates. Maximal degree in co-relation 36826. Up to 4634 conditions per place. [2024-06-03 20:50:34,854 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 465 selfloop transitions, 86 changer transitions 0/558 dead transitions. [2024-06-03 20:50:34,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 558 transitions, 8269 flow [2024-06-03 20:50:34,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:50:34,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:50:34,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 286 transitions. [2024-06-03 20:50:34,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-03 20:50:34,856 INFO L175 Difference]: Start difference. First operand has 389 places, 518 transitions, 6596 flow. Second operand 13 states and 286 transitions. [2024-06-03 20:50:34,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 558 transitions, 8269 flow [2024-06-03 20:50:38,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 558 transitions, 7856 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-03 20:50:38,525 INFO L231 Difference]: Finished difference. Result has 392 places, 524 transitions, 6447 flow [2024-06-03 20:50:38,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6183, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6447, PETRI_PLACES=392, PETRI_TRANSITIONS=524} [2024-06-03 20:50:38,525 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-03 20:50:38,525 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 524 transitions, 6447 flow [2024-06-03 20:50:38,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:38,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:38,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:38,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 20:50:38,526 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 20:50:38,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:38,526 INFO L85 PathProgramCache]: Analyzing trace with hash -666530376, now seen corresponding path program 11 times [2024-06-03 20:50:38,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:38,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328600587] [2024-06-03 20:50:38,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:38,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:38,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:38,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328600587] [2024-06-03 20:50:38,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328600587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:38,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:38,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:38,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606986734] [2024-06-03 20:50:38,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:38,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:38,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:38,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:38,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:38,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:38,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 524 transitions, 6447 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:38,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:38,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:38,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:39,789 INFO L124 PetriNetUnfolderBase]: 3110/5290 cut-off events. [2024-06-03 20:50:39,789 INFO L125 PetriNetUnfolderBase]: For 555066/555066 co-relation queries the response was YES. [2024-06-03 20:50:39,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36927 conditions, 5290 events. 3110/5290 cut-off events. For 555066/555066 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 36041 event pairs, 574 based on Foata normal form. 1/5284 useless extension candidates. Maximal degree in co-relation 36745. Up to 4484 conditions per place. [2024-06-03 20:50:39,869 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 410 selfloop transitions, 155 changer transitions 0/572 dead transitions. [2024-06-03 20:50:39,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 572 transitions, 8365 flow [2024-06-03 20:50:39,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:50:39,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:50:39,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-06-03 20:50:39,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577922077922078 [2024-06-03 20:50:39,870 INFO L175 Difference]: Start difference. First operand has 392 places, 524 transitions, 6447 flow. Second operand 11 states and 267 transitions. [2024-06-03 20:50:39,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 572 transitions, 8365 flow [2024-06-03 20:50:43,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 572 transitions, 8143 flow, removed 23 selfloop flow, removed 11 redundant places. [2024-06-03 20:50:43,103 INFO L231 Difference]: Finished difference. Result has 393 places, 527 transitions, 6642 flow [2024-06-03 20:50:43,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6225, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6642, PETRI_PLACES=393, PETRI_TRANSITIONS=527} [2024-06-03 20:50:43,104 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-03 20:50:43,104 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 527 transitions, 6642 flow [2024-06-03 20:50:43,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:43,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:43,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:43,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 20:50:43,105 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 20:50:43,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:43,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2012927748, now seen corresponding path program 11 times [2024-06-03 20:50:43,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:43,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235129373] [2024-06-03 20:50:43,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:43,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:43,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:43,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235129373] [2024-06-03 20:50:43,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235129373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:43,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:43,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:43,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710039418] [2024-06-03 20:50:43,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:43,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:43,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:43,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:43,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:43,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:43,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 527 transitions, 6642 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:43,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:43,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:43,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:44,433 INFO L124 PetriNetUnfolderBase]: 3115/5298 cut-off events. [2024-06-03 20:50:44,433 INFO L125 PetriNetUnfolderBase]: For 565766/565766 co-relation queries the response was YES. [2024-06-03 20:50:44,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37317 conditions, 5298 events. 3115/5298 cut-off events. For 565766/565766 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 36036 event pairs, 583 based on Foata normal form. 1/5292 useless extension candidates. Maximal degree in co-relation 37135. Up to 4512 conditions per place. [2024-06-03 20:50:44,502 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 385 selfloop transitions, 168 changer transitions 0/560 dead transitions. [2024-06-03 20:50:44,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 560 transitions, 8506 flow [2024-06-03 20:50:44,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:44,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:44,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-03 20:50:44,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-03 20:50:44,503 INFO L175 Difference]: Start difference. First operand has 393 places, 527 transitions, 6642 flow. Second operand 8 states and 199 transitions. [2024-06-03 20:50:44,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 560 transitions, 8506 flow [2024-06-03 20:50:47,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 560 transitions, 8140 flow, removed 19 selfloop flow, removed 12 redundant places. [2024-06-03 20:50:47,305 INFO L231 Difference]: Finished difference. Result has 389 places, 530 transitions, 6686 flow [2024-06-03 20:50:47,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6294, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6686, PETRI_PLACES=389, PETRI_TRANSITIONS=530} [2024-06-03 20:50:47,306 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-03 20:50:47,306 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 530 transitions, 6686 flow [2024-06-03 20:50:47,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:47,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:47,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:47,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 20:50:47,306 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 20:50:47,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:47,307 INFO L85 PathProgramCache]: Analyzing trace with hash -289619670, now seen corresponding path program 12 times [2024-06-03 20:50:47,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:47,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456739363] [2024-06-03 20:50:47,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:47,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:47,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:47,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:47,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456739363] [2024-06-03 20:50:47,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456739363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:47,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:47,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:47,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892977303] [2024-06-03 20:50:47,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:47,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:47,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:47,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:47,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:47,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:47,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 530 transitions, 6686 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:47,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:47,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:47,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:48,558 INFO L124 PetriNetUnfolderBase]: 3112/5295 cut-off events. [2024-06-03 20:50:48,558 INFO L125 PetriNetUnfolderBase]: For 540561/540561 co-relation queries the response was YES. [2024-06-03 20:50:48,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36977 conditions, 5295 events. 3112/5295 cut-off events. For 540561/540561 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 36027 event pairs, 574 based on Foata normal form. 1/5289 useless extension candidates. Maximal degree in co-relation 36796. Up to 4488 conditions per place. [2024-06-03 20:50:48,636 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 404 selfloop transitions, 155 changer transitions 0/566 dead transitions. [2024-06-03 20:50:48,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 566 transitions, 8314 flow [2024-06-03 20:50:48,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:50:48,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:50:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-03 20:50:48,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-03 20:50:48,637 INFO L175 Difference]: Start difference. First operand has 389 places, 530 transitions, 6686 flow. Second operand 9 states and 222 transitions. [2024-06-03 20:50:48,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 566 transitions, 8314 flow [2024-06-03 20:50:51,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 566 transitions, 7964 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-03 20:50:52,000 INFO L231 Difference]: Finished difference. Result has 390 places, 530 transitions, 6669 flow [2024-06-03 20:50:52,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6344, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6669, PETRI_PLACES=390, PETRI_TRANSITIONS=530} [2024-06-03 20:50:52,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-03 20:50:52,001 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 530 transitions, 6669 flow [2024-06-03 20:50:52,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:52,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:52,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:52,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 20:50:52,001 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 20:50:52,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:52,001 INFO L85 PathProgramCache]: Analyzing trace with hash -289440924, now seen corresponding path program 12 times [2024-06-03 20:50:52,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:52,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598165185] [2024-06-03 20:50:52,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:52,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:52,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:52,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598165185] [2024-06-03 20:50:52,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598165185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:52,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:52,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:52,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122489584] [2024-06-03 20:50:52,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:52,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:52,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:52,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:52,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:52,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:52,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 530 transitions, 6669 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:52,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:52,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:52,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:53,325 INFO L124 PetriNetUnfolderBase]: 3125/5316 cut-off events. [2024-06-03 20:50:53,326 INFO L125 PetriNetUnfolderBase]: For 536979/536979 co-relation queries the response was YES. [2024-06-03 20:50:53,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37107 conditions, 5316 events. 3125/5316 cut-off events. For 536979/536979 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 36191 event pairs, 583 based on Foata normal form. 1/5310 useless extension candidates. Maximal degree in co-relation 36928. Up to 4523 conditions per place. [2024-06-03 20:50:53,401 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 376 selfloop transitions, 181 changer transitions 0/564 dead transitions. [2024-06-03 20:50:53,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 564 transitions, 8564 flow [2024-06-03 20:50:53,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:50:53,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:50:53,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-03 20:50:53,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-03 20:50:53,402 INFO L175 Difference]: Start difference. First operand has 390 places, 530 transitions, 6669 flow. Second operand 9 states and 213 transitions. [2024-06-03 20:50:53,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 564 transitions, 8564 flow [2024-06-03 20:50:56,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 564 transitions, 8234 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-03 20:50:56,159 INFO L231 Difference]: Finished difference. Result has 390 places, 536 transitions, 6812 flow [2024-06-03 20:50:56,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6351, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6812, PETRI_PLACES=390, PETRI_TRANSITIONS=536} [2024-06-03 20:50:56,159 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-03 20:50:56,159 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 536 transitions, 6812 flow [2024-06-03 20:50:56,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:56,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:56,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:56,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 20:50:56,160 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 20:50:56,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:56,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1193173496, now seen corresponding path program 1 times [2024-06-03 20:50:56,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:56,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080535476] [2024-06-03 20:50:56,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:56,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:56,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:56,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:56,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080535476] [2024-06-03 20:50:56,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080535476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:56,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:56,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:50:56,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165740117] [2024-06-03 20:50:56,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:56,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:50:56,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:56,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:50:56,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:50:56,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:50:56,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 536 transitions, 6812 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:56,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:56,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:50:56,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:57,623 INFO L124 PetriNetUnfolderBase]: 3260/5545 cut-off events. [2024-06-03 20:50:57,623 INFO L125 PetriNetUnfolderBase]: For 664055/664061 co-relation queries the response was YES. [2024-06-03 20:50:57,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39765 conditions, 5545 events. 3260/5545 cut-off events. For 664055/664061 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 37890 event pairs, 517 based on Foata normal form. 16/5556 useless extension candidates. Maximal degree in co-relation 39586. Up to 4545 conditions per place. [2024-06-03 20:50:57,693 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 459 selfloop transitions, 114 changer transitions 0/580 dead transitions. [2024-06-03 20:50:57,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 580 transitions, 8594 flow [2024-06-03 20:50:57,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:57,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:57,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-03 20:50:57,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-03 20:50:57,694 INFO L175 Difference]: Start difference. First operand has 390 places, 536 transitions, 6812 flow. Second operand 8 states and 202 transitions. [2024-06-03 20:50:57,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 580 transitions, 8594 flow [2024-06-03 20:51:00,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 580 transitions, 8280 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 20:51:00,972 INFO L231 Difference]: Finished difference. Result has 393 places, 543 transitions, 6857 flow [2024-06-03 20:51:00,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6502, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6857, PETRI_PLACES=393, PETRI_TRANSITIONS=543} [2024-06-03 20:51:00,972 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-03 20:51:00,973 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 543 transitions, 6857 flow [2024-06-03 20:51:00,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:00,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:00,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:00,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 20:51:00,973 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 20:51:00,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:00,973 INFO L85 PathProgramCache]: Analyzing trace with hash 14286088, now seen corresponding path program 2 times [2024-06-03 20:51:00,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:00,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826171411] [2024-06-03 20:51:00,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:00,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:01,211 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 20:51:01,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:01,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826171411] [2024-06-03 20:51:01,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826171411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:01,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:01,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:51:01,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534290618] [2024-06-03 20:51:01,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:01,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:51:01,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:01,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:51:01,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:51:01,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:01,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 543 transitions, 6857 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:01,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:01,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:01,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:02,308 INFO L124 PetriNetUnfolderBase]: 3316/5641 cut-off events. [2024-06-03 20:51:02,309 INFO L125 PetriNetUnfolderBase]: For 688503/688509 co-relation queries the response was YES. [2024-06-03 20:51:02,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40414 conditions, 5641 events. 3316/5641 cut-off events. For 688503/688509 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 38669 event pairs, 627 based on Foata normal form. 20/5656 useless extension candidates. Maximal degree in co-relation 40234. Up to 4756 conditions per place. [2024-06-03 20:51:02,392 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 397 selfloop transitions, 175 changer transitions 0/579 dead transitions. [2024-06-03 20:51:02,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 579 transitions, 8561 flow [2024-06-03 20:51:02,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:51:02,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:51:02,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-03 20:51:02,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-03 20:51:02,393 INFO L175 Difference]: Start difference. First operand has 393 places, 543 transitions, 6857 flow. Second operand 9 states and 219 transitions. [2024-06-03 20:51:02,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 579 transitions, 8561 flow [2024-06-03 20:51:06,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 579 transitions, 8389 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-03 20:51:06,045 INFO L231 Difference]: Finished difference. Result has 399 places, 545 transitions, 7095 flow [2024-06-03 20:51:06,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6689, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7095, PETRI_PLACES=399, PETRI_TRANSITIONS=545} [2024-06-03 20:51:06,046 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-03 20:51:06,046 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 545 transitions, 7095 flow [2024-06-03 20:51:06,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:06,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:06,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:06,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 20:51:06,047 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 20:51:06,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:06,049 INFO L85 PathProgramCache]: Analyzing trace with hash -275399680, now seen corresponding path program 3 times [2024-06-03 20:51:06,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:06,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351123862] [2024-06-03 20:51:06,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:06,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:06,313 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 20:51:06,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:06,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351123862] [2024-06-03 20:51:06,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351123862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:06,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:06,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:51:06,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372248294] [2024-06-03 20:51:06,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:06,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:51:06,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:06,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:51:06,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:51:06,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:06,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 545 transitions, 7095 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:06,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:06,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:06,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:07,435 INFO L124 PetriNetUnfolderBase]: 3372/5729 cut-off events. [2024-06-03 20:51:07,435 INFO L125 PetriNetUnfolderBase]: For 680257/680263 co-relation queries the response was YES. [2024-06-03 20:51:07,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41299 conditions, 5729 events. 3372/5729 cut-off events. For 680257/680263 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 39328 event pairs, 623 based on Foata normal form. 16/5740 useless extension candidates. Maximal degree in co-relation 41117. Up to 4784 conditions per place. [2024-06-03 20:51:07,530 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 401 selfloop transitions, 179 changer transitions 0/587 dead transitions. [2024-06-03 20:51:07,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 587 transitions, 8859 flow [2024-06-03 20:51:07,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:51:07,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:51:07,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-03 20:51:07,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-03 20:51:07,531 INFO L175 Difference]: Start difference. First operand has 399 places, 545 transitions, 7095 flow. Second operand 9 states and 222 transitions. [2024-06-03 20:51:07,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 587 transitions, 8859 flow [2024-06-03 20:51:10,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 587 transitions, 8487 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-03 20:51:10,870 INFO L231 Difference]: Finished difference. Result has 402 places, 550 transitions, 7180 flow [2024-06-03 20:51:10,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6723, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7180, PETRI_PLACES=402, PETRI_TRANSITIONS=550} [2024-06-03 20:51:10,871 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-03 20:51:10,871 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 550 transitions, 7180 flow [2024-06-03 20:51:10,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:10,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:10,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:10,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 20:51:10,872 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 20:51:10,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:10,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1071212250, now seen corresponding path program 4 times [2024-06-03 20:51:10,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:10,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720296110] [2024-06-03 20:51:10,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:10,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:11,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:11,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720296110] [2024-06-03 20:51:11,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720296110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:11,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:11,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:51:11,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219026292] [2024-06-03 20:51:11,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:11,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:51:11,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:11,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:51:11,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:51:11,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:11,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 550 transitions, 7180 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:11,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:11,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:11,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:12,337 INFO L124 PetriNetUnfolderBase]: 3428/5817 cut-off events. [2024-06-03 20:51:12,337 INFO L125 PetriNetUnfolderBase]: For 717078/717084 co-relation queries the response was YES. [2024-06-03 20:51:12,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42019 conditions, 5817 events. 3428/5817 cut-off events. For 717078/717084 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 39994 event pairs, 643 based on Foata normal form. 20/5832 useless extension candidates. Maximal degree in co-relation 41835. Up to 4932 conditions per place. [2024-06-03 20:51:12,414 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 404 selfloop transitions, 178 changer transitions 0/589 dead transitions. [2024-06-03 20:51:12,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 589 transitions, 8922 flow [2024-06-03 20:51:12,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:51:12,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:51:12,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 276 transitions. [2024-06-03 20:51:12,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:51:12,415 INFO L175 Difference]: Start difference. First operand has 402 places, 550 transitions, 7180 flow. Second operand 12 states and 276 transitions. [2024-06-03 20:51:12,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 589 transitions, 8922 flow [2024-06-03 20:51:15,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 589 transitions, 8537 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 20:51:15,843 INFO L231 Difference]: Finished difference. Result has 408 places, 552 transitions, 7215 flow [2024-06-03 20:51:15,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6795, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7215, PETRI_PLACES=408, PETRI_TRANSITIONS=552} [2024-06-03 20:51:15,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-03 20:51:15,844 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 552 transitions, 7215 flow [2024-06-03 20:51:15,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:15,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:15,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:15,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 20:51:15,845 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 20:51:15,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:15,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1442110200, now seen corresponding path program 5 times [2024-06-03 20:51:15,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:15,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385579748] [2024-06-03 20:51:15,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:15,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:16,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:16,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385579748] [2024-06-03 20:51:16,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385579748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:16,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:16,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:51:16,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372781721] [2024-06-03 20:51:16,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:16,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:51:16,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:16,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:51:16,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:51:16,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:16,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 552 transitions, 7215 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:16,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:16,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:16,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:17,243 INFO L124 PetriNetUnfolderBase]: 3484/5913 cut-off events. [2024-06-03 20:51:17,243 INFO L125 PetriNetUnfolderBase]: For 731073/731079 co-relation queries the response was YES. [2024-06-03 20:51:17,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42674 conditions, 5913 events. 3484/5913 cut-off events. For 731073/731079 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 40769 event pairs, 655 based on Foata normal form. 20/5928 useless extension candidates. Maximal degree in co-relation 42489. Up to 5020 conditions per place. [2024-06-03 20:51:17,329 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 407 selfloop transitions, 176 changer transitions 0/590 dead transitions. [2024-06-03 20:51:17,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 590 transitions, 8965 flow [2024-06-03 20:51:17,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:51:17,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:51:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 260 transitions. [2024-06-03 20:51:17,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5627705627705628 [2024-06-03 20:51:17,330 INFO L175 Difference]: Start difference. First operand has 408 places, 552 transitions, 7215 flow. Second operand 11 states and 260 transitions. [2024-06-03 20:51:17,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 590 transitions, 8965 flow [2024-06-03 20:51:21,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 590 transitions, 8579 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-03 20:51:21,579 INFO L231 Difference]: Finished difference. Result has 409 places, 554 transitions, 7249 flow [2024-06-03 20:51:21,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6829, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7249, PETRI_PLACES=409, PETRI_TRANSITIONS=554} [2024-06-03 20:51:21,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-03 20:51:21,579 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 554 transitions, 7249 flow [2024-06-03 20:51:21,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:21,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:21,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:21,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 20:51:21,580 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 20:51:21,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:21,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1442436630, now seen corresponding path program 6 times [2024-06-03 20:51:21,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:21,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158608229] [2024-06-03 20:51:21,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:21,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:21,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:21,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158608229] [2024-06-03 20:51:21,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158608229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:21,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:21,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:51:21,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690253461] [2024-06-03 20:51:21,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:21,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:51:21,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:21,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:51:21,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:51:21,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:21,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 554 transitions, 7249 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:21,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:21,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:21,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:23,043 INFO L124 PetriNetUnfolderBase]: 3540/6001 cut-off events. [2024-06-03 20:51:23,043 INFO L125 PetriNetUnfolderBase]: For 722274/722280 co-relation queries the response was YES. [2024-06-03 20:51:23,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43217 conditions, 6001 events. 3540/6001 cut-off events. For 722274/722280 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 41378 event pairs, 651 based on Foata normal form. 16/6012 useless extension candidates. Maximal degree in co-relation 43031. Up to 4984 conditions per place. [2024-06-03 20:51:23,130 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 409 selfloop transitions, 182 changer transitions 0/598 dead transitions. [2024-06-03 20:51:23,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 598 transitions, 9069 flow [2024-06-03 20:51:23,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:51:23,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:51:23,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 262 transitions. [2024-06-03 20:51:23,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670995670995671 [2024-06-03 20:51:23,132 INFO L175 Difference]: Start difference. First operand has 409 places, 554 transitions, 7249 flow. Second operand 11 states and 262 transitions. [2024-06-03 20:51:23,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 598 transitions, 9069 flow [2024-06-03 20:51:27,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 598 transitions, 8683 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-03 20:51:27,525 INFO L231 Difference]: Finished difference. Result has 412 places, 559 transitions, 7348 flow [2024-06-03 20:51:27,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6863, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7348, PETRI_PLACES=412, PETRI_TRANSITIONS=559} [2024-06-03 20:51:27,526 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-03 20:51:27,526 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 559 transitions, 7348 flow [2024-06-03 20:51:27,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:27,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:27,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:27,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 20:51:27,527 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 20:51:27,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:27,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1057867866, now seen corresponding path program 1 times [2024-06-03 20:51:27,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:27,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377929630] [2024-06-03 20:51:27,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:27,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:27,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:27,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377929630] [2024-06-03 20:51:27,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377929630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:27,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:27,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:51:27,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801893257] [2024-06-03 20:51:27,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:27,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:51:27,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:27,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:51:27,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:51:27,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:27,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 559 transitions, 7348 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:27,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:27,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:27,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:28,989 INFO L124 PetriNetUnfolderBase]: 3580/6073 cut-off events. [2024-06-03 20:51:28,989 INFO L125 PetriNetUnfolderBase]: For 735497/735503 co-relation queries the response was YES. [2024-06-03 20:51:29,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43709 conditions, 6073 events. 3580/6073 cut-off events. For 735497/735503 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 41985 event pairs, 663 based on Foata normal form. 16/6084 useless extension candidates. Maximal degree in co-relation 43521. Up to 4984 conditions per place. [2024-06-03 20:51:29,077 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 407 selfloop transitions, 187 changer transitions 0/601 dead transitions. [2024-06-03 20:51:29,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 601 transitions, 9136 flow [2024-06-03 20:51:29,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:51:29,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:51:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 278 transitions. [2024-06-03 20:51:29,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5515873015873016 [2024-06-03 20:51:29,078 INFO L175 Difference]: Start difference. First operand has 412 places, 559 transitions, 7348 flow. Second operand 12 states and 278 transitions. [2024-06-03 20:51:29,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 601 transitions, 9136 flow [2024-06-03 20:51:33,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 601 transitions, 8731 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-03 20:51:33,206 INFO L231 Difference]: Finished difference. Result has 416 places, 561 transitions, 7376 flow [2024-06-03 20:51:33,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6943, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7376, PETRI_PLACES=416, PETRI_TRANSITIONS=561} [2024-06-03 20:51:33,206 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-03 20:51:33,206 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 561 transitions, 7376 flow [2024-06-03 20:51:33,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:33,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:33,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:33,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 20:51:33,207 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 20:51:33,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:33,207 INFO L85 PathProgramCache]: Analyzing trace with hash 657589674, now seen corresponding path program 1 times [2024-06-03 20:51:33,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:33,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648874486] [2024-06-03 20:51:33,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:33,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:33,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:33,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648874486] [2024-06-03 20:51:33,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648874486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:33,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:33,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:33,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394776658] [2024-06-03 20:51:33,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:33,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:33,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:33,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:33,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:33,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:33,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 561 transitions, 7376 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:33,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:33,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:33,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:34,662 INFO L124 PetriNetUnfolderBase]: 3588/6083 cut-off events. [2024-06-03 20:51:34,662 INFO L125 PetriNetUnfolderBase]: For 688527/688533 co-relation queries the response was YES. [2024-06-03 20:51:34,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43810 conditions, 6083 events. 3588/6083 cut-off events. For 688527/688533 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 42045 event pairs, 674 based on Foata normal form. 6/6084 useless extension candidates. Maximal degree in co-relation 43621. Up to 5427 conditions per place. [2024-06-03 20:51:34,747 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 508 selfloop transitions, 67 changer transitions 0/582 dead transitions. [2024-06-03 20:51:34,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 582 transitions, 8638 flow [2024-06-03 20:51:34,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:51:34,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:51:34,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-03 20:51:34,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-03 20:51:34,748 INFO L175 Difference]: Start difference. First operand has 416 places, 561 transitions, 7376 flow. Second operand 8 states and 182 transitions. [2024-06-03 20:51:34,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 582 transitions, 8638 flow [2024-06-03 20:51:38,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 582 transitions, 8227 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-03 20:51:38,727 INFO L231 Difference]: Finished difference. Result has 414 places, 563 transitions, 7174 flow [2024-06-03 20:51:38,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6965, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7174, PETRI_PLACES=414, PETRI_TRANSITIONS=563} [2024-06-03 20:51:38,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-03 20:51:38,727 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 563 transitions, 7174 flow [2024-06-03 20:51:38,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:38,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:38,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:38,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 20:51:38,728 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 20:51:38,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:38,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1057862906, now seen corresponding path program 2 times [2024-06-03 20:51:38,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:38,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572169987] [2024-06-03 20:51:38,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:38,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:38,949 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 20:51:38,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:38,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572169987] [2024-06-03 20:51:38,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572169987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:38,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:38,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:38,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039996310] [2024-06-03 20:51:38,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:38,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:38,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:38,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:38,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:38,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:38,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 563 transitions, 7174 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:38,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:38,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:38,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:40,113 INFO L124 PetriNetUnfolderBase]: 3596/6091 cut-off events. [2024-06-03 20:51:40,113 INFO L125 PetriNetUnfolderBase]: For 699087/699093 co-relation queries the response was YES. [2024-06-03 20:51:40,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43478 conditions, 6091 events. 3596/6091 cut-off events. For 699087/699093 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 42084 event pairs, 666 based on Foata normal form. 6/6092 useless extension candidates. Maximal degree in co-relation 43288. Up to 5419 conditions per place. [2024-06-03 20:51:40,203 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 507 selfloop transitions, 72 changer transitions 0/586 dead transitions. [2024-06-03 20:51:40,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 586 transitions, 8452 flow [2024-06-03 20:51:40,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:51:40,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:51:40,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-03 20:51:40,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-03 20:51:40,204 INFO L175 Difference]: Start difference. First operand has 414 places, 563 transitions, 7174 flow. Second operand 9 states and 201 transitions. [2024-06-03 20:51:40,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 586 transitions, 8452 flow [2024-06-03 20:51:44,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 586 transitions, 8259 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 20:51:44,269 INFO L231 Difference]: Finished difference. Result has 417 places, 565 transitions, 7204 flow [2024-06-03 20:51:44,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6981, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7204, PETRI_PLACES=417, PETRI_TRANSITIONS=565} [2024-06-03 20:51:44,270 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-03 20:51:44,270 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 565 transitions, 7204 flow [2024-06-03 20:51:44,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:44,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:44,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:44,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 20:51:44,270 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 20:51:44,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:44,271 INFO L85 PathProgramCache]: Analyzing trace with hash 2023236468, now seen corresponding path program 13 times [2024-06-03 20:51:44,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:44,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645814858] [2024-06-03 20:51:44,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:44,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:44,493 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 20:51:44,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:44,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645814858] [2024-06-03 20:51:44,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645814858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:44,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:44,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:44,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759317734] [2024-06-03 20:51:44,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:44,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:44,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:44,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:44,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:44,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:44,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 565 transitions, 7204 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:44,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:44,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:44,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:45,662 INFO L124 PetriNetUnfolderBase]: 3617/6128 cut-off events. [2024-06-03 20:51:45,662 INFO L125 PetriNetUnfolderBase]: For 717513/717519 co-relation queries the response was YES. [2024-06-03 20:51:45,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43964 conditions, 6128 events. 3617/6128 cut-off events. For 717513/717519 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 42371 event pairs, 683 based on Foata normal form. 1/6122 useless extension candidates. Maximal degree in co-relation 43773. Up to 5226 conditions per place. [2024-06-03 20:51:45,754 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 426 selfloop transitions, 174 changer transitions 0/607 dead transitions. [2024-06-03 20:51:45,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 607 transitions, 9258 flow [2024-06-03 20:51:45,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:51:45,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:51:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-03 20:51:45,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-03 20:51:45,755 INFO L175 Difference]: Start difference. First operand has 417 places, 565 transitions, 7204 flow. Second operand 8 states and 201 transitions. [2024-06-03 20:51:45,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 607 transitions, 9258 flow [2024-06-03 20:51:50,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 607 transitions, 9051 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-03 20:51:50,132 INFO L231 Difference]: Finished difference. Result has 418 places, 574 transitions, 7457 flow [2024-06-03 20:51:50,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6997, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7457, PETRI_PLACES=418, PETRI_TRANSITIONS=574} [2024-06-03 20:51:50,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-03 20:51:50,133 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 574 transitions, 7457 flow [2024-06-03 20:51:50,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:50,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:50,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:50,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 20:51:50,134 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 20:51:50,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:50,134 INFO L85 PathProgramCache]: Analyzing trace with hash 2023356438, now seen corresponding path program 14 times [2024-06-03 20:51:50,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:50,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365158518] [2024-06-03 20:51:50,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:50,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:50,372 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 20:51:50,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:50,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365158518] [2024-06-03 20:51:50,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365158518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:50,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:50,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:50,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867435525] [2024-06-03 20:51:50,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:50,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:50,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:50,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:50,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:50,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:50,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 574 transitions, 7457 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:50,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:50,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:50,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:51,599 INFO L124 PetriNetUnfolderBase]: 3614/6126 cut-off events. [2024-06-03 20:51:51,600 INFO L125 PetriNetUnfolderBase]: For 723398/723404 co-relation queries the response was YES. [2024-06-03 20:51:51,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44100 conditions, 6126 events. 3614/6126 cut-off events. For 723398/723404 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 42377 event pairs, 668 based on Foata normal form. 5/6126 useless extension candidates. Maximal degree in co-relation 43908. Up to 5437 conditions per place. [2024-06-03 20:51:51,693 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 518 selfloop transitions, 76 changer transitions 0/601 dead transitions. [2024-06-03 20:51:51,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 601 transitions, 8713 flow [2024-06-03 20:51:51,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:51:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:51:51,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 20:51:51,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-03 20:51:51,694 INFO L175 Difference]: Start difference. First operand has 418 places, 574 transitions, 7457 flow. Second operand 8 states and 191 transitions. [2024-06-03 20:51:51,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 601 transitions, 8713 flow [2024-06-03 20:51:56,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 601 transitions, 8331 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 20:51:56,182 INFO L231 Difference]: Finished difference. Result has 421 places, 574 transitions, 7233 flow [2024-06-03 20:51:56,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7075, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7233, PETRI_PLACES=421, PETRI_TRANSITIONS=574} [2024-06-03 20:51:56,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-03 20:51:56,182 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 574 transitions, 7233 flow [2024-06-03 20:51:56,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:56,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:56,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:56,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 20:51:56,183 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 20:51:56,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:56,183 INFO L85 PathProgramCache]: Analyzing trace with hash -2072429038, now seen corresponding path program 15 times [2024-06-03 20:51:56,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:56,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738439149] [2024-06-03 20:51:56,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:56,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:56,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:56,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:56,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738439149] [2024-06-03 20:51:56,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738439149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:56,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:56,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:51:56,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845978159] [2024-06-03 20:51:56,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:56,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:51:56,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:56,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:51:56,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:51:56,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:51:56,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 574 transitions, 7233 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:56,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:56,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:51:56,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:57,599 INFO L124 PetriNetUnfolderBase]: 3635/6157 cut-off events. [2024-06-03 20:51:57,599 INFO L125 PetriNetUnfolderBase]: For 747653/747659 co-relation queries the response was YES. [2024-06-03 20:51:57,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44307 conditions, 6157 events. 3635/6157 cut-off events. For 747653/747659 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 42585 event pairs, 681 based on Foata normal form. 1/6151 useless extension candidates. Maximal degree in co-relation 44114. Up to 5247 conditions per place. [2024-06-03 20:51:57,690 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 431 selfloop transitions, 187 changer transitions 0/625 dead transitions. [2024-06-03 20:51:57,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 625 transitions, 9577 flow [2024-06-03 20:51:57,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:51:57,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:51:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-03 20:51:57,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-03 20:51:57,691 INFO L175 Difference]: Start difference. First operand has 421 places, 574 transitions, 7233 flow. Second operand 10 states and 246 transitions. [2024-06-03 20:51:57,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 625 transitions, 9577 flow [2024-06-03 20:52:03,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 625 transitions, 9413 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 20:52:03,028 INFO L231 Difference]: Finished difference. Result has 423 places, 583 transitions, 7549 flow [2024-06-03 20:52:03,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7069, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7549, PETRI_PLACES=423, PETRI_TRANSITIONS=583} [2024-06-03 20:52:03,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-03 20:52:03,029 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 583 transitions, 7549 flow [2024-06-03 20:52:03,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:03,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:03,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:03,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 20:52:03,029 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 20:52:03,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:03,030 INFO L85 PathProgramCache]: Analyzing trace with hash -2061953518, now seen corresponding path program 16 times [2024-06-03 20:52:03,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:03,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396191272] [2024-06-03 20:52:03,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:03,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:03,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:03,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396191272] [2024-06-03 20:52:03,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396191272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:03,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:03,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:52:03,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121303915] [2024-06-03 20:52:03,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:03,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:52:03,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:03,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:52:03,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:52:03,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:03,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 583 transitions, 7549 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:03,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:03,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:03,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:04,543 INFO L124 PetriNetUnfolderBase]: 3632/6153 cut-off events. [2024-06-03 20:52:04,543 INFO L125 PetriNetUnfolderBase]: For 754345/754351 co-relation queries the response was YES. [2024-06-03 20:52:04,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44578 conditions, 6153 events. 3632/6153 cut-off events. For 754345/754351 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 42602 event pairs, 683 based on Foata normal form. 1/6147 useless extension candidates. Maximal degree in co-relation 44384. Up to 5244 conditions per place. [2024-06-03 20:52:04,627 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 426 selfloop transitions, 189 changer transitions 0/622 dead transitions. [2024-06-03 20:52:04,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 622 transitions, 9559 flow [2024-06-03 20:52:04,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:52:04,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:52:04,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-06-03 20:52:04,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-06-03 20:52:04,629 INFO L175 Difference]: Start difference. First operand has 423 places, 583 transitions, 7549 flow. Second operand 11 states and 259 transitions. [2024-06-03 20:52:04,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 622 transitions, 9559 flow [2024-06-03 20:52:09,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 622 transitions, 9151 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-03 20:52:09,891 INFO L231 Difference]: Finished difference. Result has 427 places, 583 transitions, 7525 flow [2024-06-03 20:52:09,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7141, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7525, PETRI_PLACES=427, PETRI_TRANSITIONS=583} [2024-06-03 20:52:09,891 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-03 20:52:09,891 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 583 transitions, 7525 flow [2024-06-03 20:52:09,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:09,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:09,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:09,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 20:52:09,892 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 20:52:09,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:09,892 INFO L85 PathProgramCache]: Analyzing trace with hash 410945750, now seen corresponding path program 17 times [2024-06-03 20:52:09,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:09,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422325964] [2024-06-03 20:52:09,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:09,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:10,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:10,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:10,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422325964] [2024-06-03 20:52:10,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422325964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:10,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:10,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:52:10,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66742934] [2024-06-03 20:52:10,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:10,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:52:10,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:10,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:52:10,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:52:10,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:10,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 583 transitions, 7525 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:10,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:10,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:10,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:11,632 INFO L124 PetriNetUnfolderBase]: 3637/6158 cut-off events. [2024-06-03 20:52:11,632 INFO L125 PetriNetUnfolderBase]: For 767418/767424 co-relation queries the response was YES. [2024-06-03 20:52:11,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44706 conditions, 6158 events. 3637/6158 cut-off events. For 767418/767424 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42642 event pairs, 682 based on Foata normal form. 5/6155 useless extension candidates. Maximal degree in co-relation 44511. Up to 5250 conditions per place. [2024-06-03 20:52:11,718 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 421 selfloop transitions, 191 changer transitions 0/619 dead transitions. [2024-06-03 20:52:11,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 619 transitions, 9331 flow [2024-06-03 20:52:11,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:52:11,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:52:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-03 20:52:11,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-03 20:52:11,719 INFO L175 Difference]: Start difference. First operand has 427 places, 583 transitions, 7525 flow. Second operand 9 states and 215 transitions. [2024-06-03 20:52:11,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 619 transitions, 9331 flow [2024-06-03 20:52:16,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 619 transitions, 8966 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 20:52:16,064 INFO L231 Difference]: Finished difference. Result has 428 places, 586 transitions, 7588 flow [2024-06-03 20:52:16,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7166, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7588, PETRI_PLACES=428, PETRI_TRANSITIONS=586} [2024-06-03 20:52:16,064 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-03 20:52:16,064 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 586 transitions, 7588 flow [2024-06-03 20:52:16,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:16,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:16,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:16,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 20:52:16,065 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 20:52:16,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:16,065 INFO L85 PathProgramCache]: Analyzing trace with hash -365294612, now seen corresponding path program 18 times [2024-06-03 20:52:16,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:16,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826807271] [2024-06-03 20:52:16,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:16,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:16,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:16,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826807271] [2024-06-03 20:52:16,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826807271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:16,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:16,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:52:16,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298787572] [2024-06-03 20:52:16,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:16,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:52:16,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:16,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:52:16,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:52:16,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:16,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 586 transitions, 7588 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:16,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:16,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:16,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:17,631 INFO L124 PetriNetUnfolderBase]: 3634/6160 cut-off events. [2024-06-03 20:52:17,631 INFO L125 PetriNetUnfolderBase]: For 772678/772684 co-relation queries the response was YES. [2024-06-03 20:52:17,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44700 conditions, 6160 events. 3634/6160 cut-off events. For 772678/772684 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42682 event pairs, 668 based on Foata normal form. 5/6160 useless extension candidates. Maximal degree in co-relation 44504. Up to 5455 conditions per place. [2024-06-03 20:52:17,733 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 525 selfloop transitions, 86 changer transitions 0/618 dead transitions. [2024-06-03 20:52:17,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 618 transitions, 9120 flow [2024-06-03 20:52:17,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:52:17,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:52:17,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 267 transitions. [2024-06-03 20:52:17,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-06-03 20:52:17,734 INFO L175 Difference]: Start difference. First operand has 428 places, 586 transitions, 7588 flow. Second operand 12 states and 267 transitions. [2024-06-03 20:52:17,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 618 transitions, 9120 flow [2024-06-03 20:52:23,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 618 transitions, 8691 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 20:52:23,026 INFO L231 Difference]: Finished difference. Result has 433 places, 586 transitions, 7337 flow [2024-06-03 20:52:23,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7159, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7337, PETRI_PLACES=433, PETRI_TRANSITIONS=586} [2024-06-03 20:52:23,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-03 20:52:23,027 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 586 transitions, 7337 flow [2024-06-03 20:52:23,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:23,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:23,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:23,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 20:52:23,028 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 20:52:23,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:23,028 INFO L85 PathProgramCache]: Analyzing trace with hash -209721332, now seen corresponding path program 19 times [2024-06-03 20:52:23,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:23,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157253294] [2024-06-03 20:52:23,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:23,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:23,262 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 20:52:23,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:23,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157253294] [2024-06-03 20:52:23,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157253294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:23,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:23,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:52:23,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297417796] [2024-06-03 20:52:23,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:23,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:52:23,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:23,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:52:23,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:52:23,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:23,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 586 transitions, 7337 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:23,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:23,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:23,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:24,538 INFO L124 PetriNetUnfolderBase]: 3639/6163 cut-off events. [2024-06-03 20:52:24,539 INFO L125 PetriNetUnfolderBase]: For 784970/784976 co-relation queries the response was YES. [2024-06-03 20:52:24,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44509 conditions, 6163 events. 3639/6163 cut-off events. For 784970/784976 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42774 event pairs, 682 based on Foata normal form. 5/6160 useless extension candidates. Maximal degree in co-relation 44312. Up to 5253 conditions per place. [2024-06-03 20:52:24,639 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 422 selfloop transitions, 195 changer transitions 0/624 dead transitions. [2024-06-03 20:52:24,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 624 transitions, 9151 flow [2024-06-03 20:52:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:52:24,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:52:24,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 251 transitions. [2024-06-03 20:52:24,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432900432900433 [2024-06-03 20:52:24,640 INFO L175 Difference]: Start difference. First operand has 433 places, 586 transitions, 7337 flow. Second operand 11 states and 251 transitions. [2024-06-03 20:52:24,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 624 transitions, 9151 flow [2024-06-03 20:52:28,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 624 transitions, 8975 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 20:52:28,677 INFO L231 Difference]: Finished difference. Result has 434 places, 589 transitions, 7583 flow [2024-06-03 20:52:28,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7161, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7583, PETRI_PLACES=434, PETRI_TRANSITIONS=589} [2024-06-03 20:52:28,678 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-03 20:52:28,678 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 589 transitions, 7583 flow [2024-06-03 20:52:28,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:28,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:28,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:28,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 20:52:28,678 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 20:52:28,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:28,679 INFO L85 PathProgramCache]: Analyzing trace with hash -291835144, now seen corresponding path program 20 times [2024-06-03 20:52:28,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:28,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551606370] [2024-06-03 20:52:28,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:28,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:28,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:28,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551606370] [2024-06-03 20:52:28,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551606370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:28,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:28,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:52:28,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539250340] [2024-06-03 20:52:28,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:28,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:52:28,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:28,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:52:28,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:52:28,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:28,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 589 transitions, 7583 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:28,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:28,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:28,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:30,249 INFO L124 PetriNetUnfolderBase]: 3636/6165 cut-off events. [2024-06-03 20:52:30,249 INFO L125 PetriNetUnfolderBase]: For 790887/790893 co-relation queries the response was YES. [2024-06-03 20:52:30,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44773 conditions, 6165 events. 3636/6165 cut-off events. For 790887/790893 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42732 event pairs, 666 based on Foata normal form. 5/6165 useless extension candidates. Maximal degree in co-relation 44575. Up to 5459 conditions per place. [2024-06-03 20:52:30,354 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 525 selfloop transitions, 86 changer transitions 0/618 dead transitions. [2024-06-03 20:52:30,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 618 transitions, 8877 flow [2024-06-03 20:52:30,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:52:30,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:52:30,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-03 20:52:30,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452380952380952 [2024-06-03 20:52:30,355 INFO L175 Difference]: Start difference. First operand has 434 places, 589 transitions, 7583 flow. Second operand 10 states and 229 transitions. [2024-06-03 20:52:30,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 618 transitions, 8877 flow [2024-06-03 20:52:35,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 618 transitions, 8469 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-03 20:52:35,525 INFO L231 Difference]: Finished difference. Result has 435 places, 589 transitions, 7353 flow [2024-06-03 20:52:35,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7175, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7353, PETRI_PLACES=435, PETRI_TRANSITIONS=589} [2024-06-03 20:52:35,525 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-03 20:52:35,525 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 589 transitions, 7353 flow [2024-06-03 20:52:35,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:35,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:35,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:35,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 20:52:35,526 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 20:52:35,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:35,526 INFO L85 PathProgramCache]: Analyzing trace with hash 144541708, now seen corresponding path program 21 times [2024-06-03 20:52:35,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:35,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372105572] [2024-06-03 20:52:35,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:35,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:35,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:35,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372105572] [2024-06-03 20:52:35,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372105572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:35,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:35,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:52:35,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853699763] [2024-06-03 20:52:35,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:35,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:52:35,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:35,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:52:35,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:52:35,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:35,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 589 transitions, 7353 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:35,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:35,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:35,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:37,010 INFO L124 PetriNetUnfolderBase]: 3633/6155 cut-off events. [2024-06-03 20:52:37,017 INFO L125 PetriNetUnfolderBase]: For 796130/796136 co-relation queries the response was YES. [2024-06-03 20:52:37,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44437 conditions, 6155 events. 3633/6155 cut-off events. For 796130/796136 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 42699 event pairs, 684 based on Foata normal form. 5/6152 useless extension candidates. Maximal degree in co-relation 44238. Up to 5247 conditions per place. [2024-06-03 20:52:37,118 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 410 selfloop transitions, 199 changer transitions 0/616 dead transitions. [2024-06-03 20:52:37,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 616 transitions, 8875 flow [2024-06-03 20:52:37,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:52:37,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:52:37,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-03 20:52:37,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 20:52:37,121 INFO L175 Difference]: Start difference. First operand has 435 places, 589 transitions, 7353 flow. Second operand 10 states and 225 transitions. [2024-06-03 20:52:37,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 616 transitions, 8875 flow [2024-06-03 20:52:40,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 616 transitions, 8703 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-03 20:52:40,906 INFO L231 Difference]: Finished difference. Result has 436 places, 589 transitions, 7585 flow [2024-06-03 20:52:40,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7181, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7585, PETRI_PLACES=436, PETRI_TRANSITIONS=589} [2024-06-03 20:52:40,907 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-03 20:52:40,907 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 589 transitions, 7585 flow [2024-06-03 20:52:40,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:40,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:40,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:40,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 20:52:40,908 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 20:52:40,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:40,908 INFO L85 PathProgramCache]: Analyzing trace with hash 56670884, now seen corresponding path program 13 times [2024-06-03 20:52:40,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:40,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906236118] [2024-06-03 20:52:40,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:40,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:41,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:41,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906236118] [2024-06-03 20:52:41,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906236118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:41,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:41,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:52:41,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592794719] [2024-06-03 20:52:41,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:41,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:52:41,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:41,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:52:41,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:52:41,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:41,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 589 transitions, 7585 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:41,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:41,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:41,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:42,514 INFO L124 PetriNetUnfolderBase]: 3638/6159 cut-off events. [2024-06-03 20:52:42,515 INFO L125 PetriNetUnfolderBase]: For 808175/808175 co-relation queries the response was YES. [2024-06-03 20:52:42,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44884 conditions, 6159 events. 3638/6159 cut-off events. For 808175/808175 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42695 event pairs, 677 based on Foata normal form. 1/6153 useless extension candidates. Maximal degree in co-relation 44684. Up to 5455 conditions per place. [2024-06-03 20:52:42,606 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 504 selfloop transitions, 103 changer transitions 0/614 dead transitions. [2024-06-03 20:52:42,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 614 transitions, 9129 flow [2024-06-03 20:52:42,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:52:42,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:52:42,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-03 20:52:42,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173160173160173 [2024-06-03 20:52:42,607 INFO L175 Difference]: Start difference. First operand has 436 places, 589 transitions, 7585 flow. Second operand 11 states and 239 transitions. [2024-06-03 20:52:42,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 614 transitions, 9129 flow [2024-06-03 20:52:46,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 614 transitions, 8756 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 20:52:46,598 INFO L231 Difference]: Finished difference. Result has 439 places, 592 transitions, 7468 flow [2024-06-03 20:52:46,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7212, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7468, PETRI_PLACES=439, PETRI_TRANSITIONS=592} [2024-06-03 20:52:46,598 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-03 20:52:46,598 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 592 transitions, 7468 flow [2024-06-03 20:52:46,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:46,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:46,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:46,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-03 20:52:46,599 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 20:52:46,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:46,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1016739006, now seen corresponding path program 22 times [2024-06-03 20:52:46,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:46,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361712552] [2024-06-03 20:52:46,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:46,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:46,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:46,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361712552] [2024-06-03 20:52:46,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361712552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:46,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:46,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:52:46,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396586317] [2024-06-03 20:52:46,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:46,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:52:46,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:46,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:52:46,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:52:46,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:46,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 592 transitions, 7468 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:46,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:46,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:46,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:48,359 INFO L124 PetriNetUnfolderBase]: 3635/6166 cut-off events. [2024-06-03 20:52:48,359 INFO L125 PetriNetUnfolderBase]: For 813871/813877 co-relation queries the response was YES. [2024-06-03 20:52:48,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44541 conditions, 6166 events. 3635/6166 cut-off events. For 813871/813877 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42774 event pairs, 666 based on Foata normal form. 5/6166 useless extension candidates. Maximal degree in co-relation 44341. Up to 5296 conditions per place. [2024-06-03 20:52:48,451 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 465 selfloop transitions, 164 changer transitions 0/636 dead transitions. [2024-06-03 20:52:48,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 636 transitions, 9562 flow [2024-06-03 20:52:48,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:52:48,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:52:48,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2024-06-03 20:52:48,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-03 20:52:48,452 INFO L175 Difference]: Start difference. First operand has 439 places, 592 transitions, 7468 flow. Second operand 10 states and 249 transitions. [2024-06-03 20:52:48,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 636 transitions, 9562 flow [2024-06-03 20:52:53,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 636 transitions, 9256 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-03 20:52:53,685 INFO L231 Difference]: Finished difference. Result has 439 places, 592 transitions, 7505 flow [2024-06-03 20:52:53,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7162, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7505, PETRI_PLACES=439, PETRI_TRANSITIONS=592} [2024-06-03 20:52:53,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-03 20:52:53,685 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 592 transitions, 7505 flow [2024-06-03 20:52:53,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:53,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:53,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:53,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-03 20:52:53,686 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 20:52:53,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:53,686 INFO L85 PathProgramCache]: Analyzing trace with hash -115104022, now seen corresponding path program 23 times [2024-06-03 20:52:53,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:53,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657302374] [2024-06-03 20:52:53,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:53,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:53,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:53,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657302374] [2024-06-03 20:52:53,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657302374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:53,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:53,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:52:53,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722528379] [2024-06-03 20:52:53,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:53,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:52:53,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:53,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:52:53,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:52:53,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:52:53,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 592 transitions, 7505 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:53,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:53,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:52:53,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:55,243 INFO L124 PetriNetUnfolderBase]: 3632/6156 cut-off events. [2024-06-03 20:52:55,243 INFO L125 PetriNetUnfolderBase]: For 820388/820394 co-relation queries the response was YES. [2024-06-03 20:52:55,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44667 conditions, 6156 events. 3632/6156 cut-off events. For 820388/820394 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 42726 event pairs, 682 based on Foata normal form. 5/6153 useless extension candidates. Maximal degree in co-relation 44466. Up to 5293 conditions per place. [2024-06-03 20:52:55,347 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 461 selfloop transitions, 151 changer transitions 0/619 dead transitions. [2024-06-03 20:52:55,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 619 transitions, 9041 flow [2024-06-03 20:52:55,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:52:55,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:52:55,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-03 20:52:55,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-03 20:52:55,349 INFO L175 Difference]: Start difference. First operand has 439 places, 592 transitions, 7505 flow. Second operand 7 states and 175 transitions. [2024-06-03 20:52:55,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 619 transitions, 9041 flow [2024-06-03 20:53:00,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 619 transitions, 8623 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-03 20:53:00,654 INFO L231 Difference]: Finished difference. Result has 434 places, 592 transitions, 7404 flow [2024-06-03 20:53:00,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7091, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7404, PETRI_PLACES=434, PETRI_TRANSITIONS=592} [2024-06-03 20:53:00,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-03 20:53:00,655 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 592 transitions, 7404 flow [2024-06-03 20:53:00,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:00,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:00,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:00,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-03 20:53:00,656 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 20:53:00,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:00,656 INFO L85 PathProgramCache]: Analyzing trace with hash -371811922, now seen corresponding path program 24 times [2024-06-03 20:53:00,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:00,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174986193] [2024-06-03 20:53:00,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:00,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:00,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:00,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174986193] [2024-06-03 20:53:00,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174986193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:00,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:00,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:53:00,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122949683] [2024-06-03 20:53:00,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:00,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:53:00,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:00,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:53:00,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:53:00,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:00,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 592 transitions, 7404 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:00,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:00,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:00,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:02,245 INFO L124 PetriNetUnfolderBase]: 3629/6158 cut-off events. [2024-06-03 20:53:02,245 INFO L125 PetriNetUnfolderBase]: For 799484/799490 co-relation queries the response was YES. [2024-06-03 20:53:02,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44333 conditions, 6158 events. 3629/6158 cut-off events. For 799484/799490 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42755 event pairs, 666 based on Foata normal form. 5/6158 useless extension candidates. Maximal degree in co-relation 44133. Up to 5290 conditions per place. [2024-06-03 20:53:02,348 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 460 selfloop transitions, 167 changer transitions 0/634 dead transitions. [2024-06-03 20:53:02,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 634 transitions, 9006 flow [2024-06-03 20:53:02,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:53:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:53:02,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-03 20:53:02,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 20:53:02,350 INFO L175 Difference]: Start difference. First operand has 434 places, 592 transitions, 7404 flow. Second operand 10 states and 245 transitions. [2024-06-03 20:53:02,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 634 transitions, 9006 flow [2024-06-03 20:53:07,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 634 transitions, 8586 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-03 20:53:07,676 INFO L231 Difference]: Finished difference. Result has 435 places, 592 transitions, 7338 flow [2024-06-03 20:53:07,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6986, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7338, PETRI_PLACES=435, PETRI_TRANSITIONS=592} [2024-06-03 20:53:07,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-03 20:53:07,677 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 592 transitions, 7338 flow [2024-06-03 20:53:07,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:07,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:07,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:07,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-03 20:53:07,678 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 20:53:07,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:07,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1982507884, now seen corresponding path program 14 times [2024-06-03 20:53:07,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:07,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023680723] [2024-06-03 20:53:07,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:07,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:07,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:07,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023680723] [2024-06-03 20:53:07,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023680723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:07,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:07,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:07,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057654493] [2024-06-03 20:53:07,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:07,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:07,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:07,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:07,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:08,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:08,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 592 transitions, 7338 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:08,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:08,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:08,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:09,397 INFO L124 PetriNetUnfolderBase]: 3626/6154 cut-off events. [2024-06-03 20:53:09,397 INFO L125 PetriNetUnfolderBase]: For 791802/791808 co-relation queries the response was YES. [2024-06-03 20:53:09,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44176 conditions, 6154 events. 3626/6154 cut-off events. For 791802/791808 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42707 event pairs, 673 based on Foata normal form. 5/6154 useless extension candidates. Maximal degree in co-relation 43976. Up to 5303 conditions per place. [2024-06-03 20:53:09,512 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 438 selfloop transitions, 180 changer transitions 0/625 dead transitions. [2024-06-03 20:53:09,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 625 transitions, 9380 flow [2024-06-03 20:53:09,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:53:09,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:53:09,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-03 20:53:09,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:53:09,513 INFO L175 Difference]: Start difference. First operand has 435 places, 592 transitions, 7338 flow. Second operand 11 states and 253 transitions. [2024-06-03 20:53:09,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 625 transitions, 9380 flow [2024-06-03 20:53:15,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 625 transitions, 9010 flow, removed 12 selfloop flow, removed 12 redundant places. [2024-06-03 20:53:15,216 INFO L231 Difference]: Finished difference. Result has 434 places, 592 transitions, 7356 flow [2024-06-03 20:53:15,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6986, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7356, PETRI_PLACES=434, PETRI_TRANSITIONS=592} [2024-06-03 20:53:15,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-03 20:53:15,216 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 592 transitions, 7356 flow [2024-06-03 20:53:15,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:15,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:15,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:15,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-03 20:53:15,217 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 20:53:15,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:15,217 INFO L85 PathProgramCache]: Analyzing trace with hash 938260132, now seen corresponding path program 15 times [2024-06-03 20:53:15,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:15,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940319457] [2024-06-03 20:53:15,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:15,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:15,458 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 20:53:15,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:15,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940319457] [2024-06-03 20:53:15,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940319457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:15,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:15,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:15,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969053639] [2024-06-03 20:53:15,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:15,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:15,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:15,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:15,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:15,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:15,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 592 transitions, 7356 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:15,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:15,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:15,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:16,733 INFO L124 PetriNetUnfolderBase]: 3631/6161 cut-off events. [2024-06-03 20:53:16,733 INFO L125 PetriNetUnfolderBase]: For 767434/767440 co-relation queries the response was YES. [2024-06-03 20:53:16,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44025 conditions, 6161 events. 3631/6161 cut-off events. For 767434/767440 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 42779 event pairs, 675 based on Foata normal form. 5/6161 useless extension candidates. Maximal degree in co-relation 43827. Up to 5309 conditions per place. [2024-06-03 20:53:16,831 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 436 selfloop transitions, 183 changer transitions 0/626 dead transitions. [2024-06-03 20:53:16,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 626 transitions, 9196 flow [2024-06-03 20:53:16,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:53:16,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:53:16,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-03 20:53:16,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-03 20:53:16,832 INFO L175 Difference]: Start difference. First operand has 434 places, 592 transitions, 7356 flow. Second operand 10 states and 235 transitions. [2024-06-03 20:53:16,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 626 transitions, 9196 flow [2024-06-03 20:53:20,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 626 transitions, 8813 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-03 20:53:21,002 INFO L231 Difference]: Finished difference. Result has 436 places, 595 transitions, 7403 flow [2024-06-03 20:53:21,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6994, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7403, PETRI_PLACES=436, PETRI_TRANSITIONS=595} [2024-06-03 20:53:21,002 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-03 20:53:21,002 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 595 transitions, 7403 flow [2024-06-03 20:53:21,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:21,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:21,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:21,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-03 20:53:21,003 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 20:53:21,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:21,003 INFO L85 PathProgramCache]: Analyzing trace with hash 595585804, now seen corresponding path program 16 times [2024-06-03 20:53:21,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:21,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586804386] [2024-06-03 20:53:21,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:21,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:21,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:21,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586804386] [2024-06-03 20:53:21,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586804386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:21,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:21,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:21,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176175998] [2024-06-03 20:53:21,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:21,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:21,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:21,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:21,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:21,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:21,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 595 transitions, 7403 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:21,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:21,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:21,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:22,569 INFO L124 PetriNetUnfolderBase]: 3628/6146 cut-off events. [2024-06-03 20:53:22,569 INFO L125 PetriNetUnfolderBase]: For 759531/759531 co-relation queries the response was YES. [2024-06-03 20:53:22,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43739 conditions, 6146 events. 3628/6146 cut-off events. For 759531/759531 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 42595 event pairs, 676 based on Foata normal form. 1/6140 useless extension candidates. Maximal degree in co-relation 43541. Up to 5306 conditions per place. [2024-06-03 20:53:22,664 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 429 selfloop transitions, 187 changer transitions 0/623 dead transitions. [2024-06-03 20:53:22,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 623 transitions, 9179 flow [2024-06-03 20:53:22,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:53:22,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:53:22,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-03 20:53:22,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:53:22,665 INFO L175 Difference]: Start difference. First operand has 436 places, 595 transitions, 7403 flow. Second operand 10 states and 230 transitions. [2024-06-03 20:53:22,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 623 transitions, 9179 flow [2024-06-03 20:53:26,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 623 transitions, 8882 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-03 20:53:26,555 INFO L231 Difference]: Finished difference. Result has 438 places, 595 transitions, 7494 flow [2024-06-03 20:53:26,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7110, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7494, PETRI_PLACES=438, PETRI_TRANSITIONS=595} [2024-06-03 20:53:26,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-03 20:53:26,555 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 595 transitions, 7494 flow [2024-06-03 20:53:26,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:26,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:26,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:26,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-03 20:53:26,556 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 20:53:26,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:26,556 INFO L85 PathProgramCache]: Analyzing trace with hash 567124846, now seen corresponding path program 25 times [2024-06-03 20:53:26,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:26,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61120081] [2024-06-03 20:53:26,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:26,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:26,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:26,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61120081] [2024-06-03 20:53:26,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61120081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:26,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:26,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:26,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325928217] [2024-06-03 20:53:26,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:26,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:26,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:26,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:26,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:26,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:26,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 595 transitions, 7494 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:26,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:26,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:26,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:28,170 INFO L124 PetriNetUnfolderBase]: 3625/6153 cut-off events. [2024-06-03 20:53:28,170 INFO L125 PetriNetUnfolderBase]: For 753642/753648 co-relation queries the response was YES. [2024-06-03 20:53:28,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43644 conditions, 6153 events. 3625/6153 cut-off events. For 753642/753648 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 42711 event pairs, 666 based on Foata normal form. 5/6153 useless extension candidates. Maximal degree in co-relation 43446. Up to 5286 conditions per place. [2024-06-03 20:53:28,266 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 167 changer transitions 0/640 dead transitions. [2024-06-03 20:53:28,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 640 transitions, 8874 flow [2024-06-03 20:53:28,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:53:28,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:53:28,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-06-03 20:53:28,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-06-03 20:53:28,267 INFO L175 Difference]: Start difference. First operand has 438 places, 595 transitions, 7494 flow. Second operand 11 states and 266 transitions. [2024-06-03 20:53:28,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 640 transitions, 8874 flow [2024-06-03 20:53:32,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 640 transitions, 8456 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-03 20:53:32,729 INFO L231 Difference]: Finished difference. Result has 440 places, 595 transitions, 7432 flow [2024-06-03 20:53:32,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7076, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7432, PETRI_PLACES=440, PETRI_TRANSITIONS=595} [2024-06-03 20:53:32,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-03 20:53:32,729 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 595 transitions, 7432 flow [2024-06-03 20:53:32,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:32,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:32,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:32,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-03 20:53:32,730 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 20:53:32,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:32,730 INFO L85 PathProgramCache]: Analyzing trace with hash 567362182, now seen corresponding path program 17 times [2024-06-03 20:53:32,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:32,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550952701] [2024-06-03 20:53:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:32,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:32,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:32,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550952701] [2024-06-03 20:53:32,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550952701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:32,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:32,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:32,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140704219] [2024-06-03 20:53:32,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:32,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:32,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:32,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:32,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:33,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:33,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 595 transitions, 7432 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:33,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:33,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:33,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:34,382 INFO L124 PetriNetUnfolderBase]: 3622/6149 cut-off events. [2024-06-03 20:53:34,382 INFO L125 PetriNetUnfolderBase]: For 746541/746547 co-relation queries the response was YES. [2024-06-03 20:53:34,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43482 conditions, 6149 events. 3622/6149 cut-off events. For 746541/746547 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 42664 event pairs, 675 based on Foata normal form. 5/6149 useless extension candidates. Maximal degree in co-relation 43283. Up to 5299 conditions per place. [2024-06-03 20:53:34,468 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 436 selfloop transitions, 180 changer transitions 0/623 dead transitions. [2024-06-03 20:53:34,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 623 transitions, 8972 flow [2024-06-03 20:53:34,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:53:34,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:53:34,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 20:53:34,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 20:53:34,469 INFO L175 Difference]: Start difference. First operand has 440 places, 595 transitions, 7432 flow. Second operand 8 states and 196 transitions. [2024-06-03 20:53:34,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 623 transitions, 8972 flow [2024-06-03 20:53:39,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 623 transitions, 8612 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-03 20:53:39,078 INFO L231 Difference]: Finished difference. Result has 437 places, 595 transitions, 7454 flow [2024-06-03 20:53:39,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7080, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7454, PETRI_PLACES=437, PETRI_TRANSITIONS=595} [2024-06-03 20:53:39,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-03 20:53:39,079 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 595 transitions, 7454 flow [2024-06-03 20:53:39,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:39,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:39,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:39,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-03 20:53:39,080 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 20:53:39,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:39,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1606611184, now seen corresponding path program 18 times [2024-06-03 20:53:39,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:39,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364081670] [2024-06-03 20:53:39,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:39,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:39,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:39,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364081670] [2024-06-03 20:53:39,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364081670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:39,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:39,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:39,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951125463] [2024-06-03 20:53:39,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:39,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:39,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:39,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:39,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:39,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:39,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 595 transitions, 7454 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:39,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:39,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:39,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:40,713 INFO L124 PetriNetUnfolderBase]: 3619/6145 cut-off events. [2024-06-03 20:53:40,713 INFO L125 PetriNetUnfolderBase]: For 705086/705092 co-relation queries the response was YES. [2024-06-03 20:53:40,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43061 conditions, 6145 events. 3619/6145 cut-off events. For 705086/705092 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 42671 event pairs, 675 based on Foata normal form. 5/6145 useless extension candidates. Maximal degree in co-relation 42862. Up to 5296 conditions per place. [2024-06-03 20:53:40,826 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 439 selfloop transitions, 181 changer transitions 0/627 dead transitions. [2024-06-03 20:53:40,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 627 transitions, 9238 flow [2024-06-03 20:53:40,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:53:40,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:53:40,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-03 20:53:40,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-03 20:53:40,827 INFO L175 Difference]: Start difference. First operand has 437 places, 595 transitions, 7454 flow. Second operand 8 states and 201 transitions. [2024-06-03 20:53:40,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 627 transitions, 9238 flow [2024-06-03 20:53:44,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 627 transitions, 8761 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-03 20:53:44,698 INFO L231 Difference]: Finished difference. Result has 435 places, 595 transitions, 7365 flow [2024-06-03 20:53:44,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6985, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7365, PETRI_PLACES=435, PETRI_TRANSITIONS=595} [2024-06-03 20:53:44,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-03 20:53:44,699 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 595 transitions, 7365 flow [2024-06-03 20:53:44,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:44,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:44,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:44,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-03 20:53:44,700 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 20:53:44,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:44,700 INFO L85 PathProgramCache]: Analyzing trace with hash 27061186, now seen corresponding path program 19 times [2024-06-03 20:53:44,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:44,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065707728] [2024-06-03 20:53:44,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:44,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:44,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:44,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:44,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065707728] [2024-06-03 20:53:44,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065707728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:44,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:44,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:53:44,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152514692] [2024-06-03 20:53:44,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:44,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:53:44,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:44,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:53:44,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:53:44,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:44,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 595 transitions, 7365 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:44,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:44,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:44,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:46,136 INFO L124 PetriNetUnfolderBase]: 3616/6139 cut-off events. [2024-06-03 20:53:46,136 INFO L125 PetriNetUnfolderBase]: For 684532/684532 co-relation queries the response was YES. [2024-06-03 20:53:46,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42784 conditions, 6139 events. 3616/6139 cut-off events. For 684532/684532 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 42631 event pairs, 654 based on Foata normal form. 1/6137 useless extension candidates. Maximal degree in co-relation 42586. Up to 5417 conditions per place. [2024-06-03 20:53:46,232 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 522 selfloop transitions, 89 changer transitions 0/618 dead transitions. [2024-06-03 20:53:46,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 618 transitions, 8875 flow [2024-06-03 20:53:46,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:53:46,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:53:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-03 20:53:46,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-03 20:53:46,245 INFO L175 Difference]: Start difference. First operand has 435 places, 595 transitions, 7365 flow. Second operand 6 states and 156 transitions. [2024-06-03 20:53:46,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 618 transitions, 8875 flow [2024-06-03 20:53:50,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 618 transitions, 8513 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-03 20:53:50,761 INFO L231 Difference]: Finished difference. Result has 432 places, 595 transitions, 7208 flow [2024-06-03 20:53:50,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7009, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7208, PETRI_PLACES=432, PETRI_TRANSITIONS=595} [2024-06-03 20:53:50,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-03 20:53:50,762 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 595 transitions, 7208 flow [2024-06-03 20:53:50,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:50,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:50,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:53:50,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-03 20:53:50,763 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 20:53:50,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:50,763 INFO L85 PathProgramCache]: Analyzing trace with hash 861435064, now seen corresponding path program 20 times [2024-06-03 20:53:50,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:50,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375432751] [2024-06-03 20:53:50,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:50,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:51,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:51,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375432751] [2024-06-03 20:53:51,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375432751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:51,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:51,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:51,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224739858] [2024-06-03 20:53:51,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:51,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:51,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:51,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:51,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:51,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:51,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 595 transitions, 7208 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:51,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:51,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:51,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:52,238 INFO L124 PetriNetUnfolderBase]: 3613/6135 cut-off events. [2024-06-03 20:53:52,238 INFO L125 PetriNetUnfolderBase]: For 655358/655358 co-relation queries the response was YES. [2024-06-03 20:53:52,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42263 conditions, 6135 events. 3613/6135 cut-off events. For 655358/655358 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 42576 event pairs, 654 based on Foata normal form. 1/6133 useless extension candidates. Maximal degree in co-relation 42067. Up to 5414 conditions per place. [2024-06-03 20:53:52,330 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 528 selfloop transitions, 89 changer transitions 0/624 dead transitions. [2024-06-03 20:53:52,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 624 transitions, 8516 flow [2024-06-03 20:53:52,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:53:52,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:53:52,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-03 20:53:52,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-03 20:53:52,332 INFO L175 Difference]: Start difference. First operand has 432 places, 595 transitions, 7208 flow. Second operand 7 states and 181 transitions. [2024-06-03 20:53:52,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 624 transitions, 8516 flow [2024-06-03 20:53:56,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 624 transitions, 8221 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:53:56,229 INFO L231 Difference]: Finished difference. Result has 432 places, 595 transitions, 7115 flow [2024-06-03 20:53:56,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6913, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7115, PETRI_PLACES=432, PETRI_TRANSITIONS=595} [2024-06-03 20:53:56,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-03 20:53:56,230 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 595 transitions, 7115 flow [2024-06-03 20:53:56,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:56,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:53:56,230 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] [2024-06-03 20:53:56,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-03 20:53:56,230 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 20:53:56,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:53:56,230 INFO L85 PathProgramCache]: Analyzing trace with hash 22296610, now seen corresponding path program 7 times [2024-06-03 20:53:56,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:53:56,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629634702] [2024-06-03 20:53:56,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:53:56,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:53:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:53:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:53:56,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:53:56,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629634702] [2024-06-03 20:53:56,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629634702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:53:56,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:53:56,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:53:56,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916470028] [2024-06-03 20:53:56,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:53:56,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:53:56,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:53:56,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:53:56,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:53:56,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:53:56,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 595 transitions, 7115 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:53:56,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:53:56,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:53:56,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:53:57,716 INFO L124 PetriNetUnfolderBase]: 3669/6227 cut-off events. [2024-06-03 20:53:57,717 INFO L125 PetriNetUnfolderBase]: For 754603/754603 co-relation queries the response was YES. [2024-06-03 20:53:57,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42975 conditions, 6227 events. 3669/6227 cut-off events. For 754603/754603 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 43257 event pairs, 536 based on Foata normal form. 16/6240 useless extension candidates. Maximal degree in co-relation 42779. Up to 5338 conditions per place. [2024-06-03 20:53:57,812 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 518 selfloop transitions, 105 changer transitions 0/630 dead transitions. [2024-06-03 20:53:57,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 630 transitions, 8525 flow [2024-06-03 20:53:57,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:53:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:53:57,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-03 20:53:57,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-03 20:53:57,814 INFO L175 Difference]: Start difference. First operand has 432 places, 595 transitions, 7115 flow. Second operand 7 states and 184 transitions. [2024-06-03 20:53:57,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 630 transitions, 8525 flow [2024-06-03 20:54:02,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 630 transitions, 8197 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-03 20:54:02,007 INFO L231 Difference]: Finished difference. Result has 430 places, 597 transitions, 7091 flow [2024-06-03 20:54:02,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6787, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7091, PETRI_PLACES=430, PETRI_TRANSITIONS=597} [2024-06-03 20:54:02,007 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-03 20:54:02,007 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 597 transitions, 7091 flow [2024-06-03 20:54:02,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:02,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:02,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:02,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-03 20:54:02,008 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 20:54:02,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:02,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1977743308, now seen corresponding path program 8 times [2024-06-03 20:54:02,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:02,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582787791] [2024-06-03 20:54:02,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:02,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:02,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:02,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582787791] [2024-06-03 20:54:02,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582787791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:02,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:02,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:54:02,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889325061] [2024-06-03 20:54:02,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:02,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:54:02,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:02,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:54:02,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:54:02,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:02,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 597 transitions, 7091 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:02,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:02,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:02,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:03,592 INFO L124 PetriNetUnfolderBase]: 3725/6313 cut-off events. [2024-06-03 20:54:03,592 INFO L125 PetriNetUnfolderBase]: For 762152/762158 co-relation queries the response was YES. [2024-06-03 20:54:03,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43914 conditions, 6313 events. 3725/6313 cut-off events. For 762152/762158 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 43929 event pairs, 691 based on Foata normal form. 20/6328 useless extension candidates. Maximal degree in co-relation 43718. Up to 5338 conditions per place. [2024-06-03 20:54:03,682 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 438 selfloop transitions, 187 changer transitions 0/632 dead transitions. [2024-06-03 20:54:03,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 632 transitions, 8507 flow [2024-06-03 20:54:03,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:54:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:54:03,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-03 20:54:03,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-06-03 20:54:03,689 INFO L175 Difference]: Start difference. First operand has 430 places, 597 transitions, 7091 flow. Second operand 10 states and 236 transitions. [2024-06-03 20:54:03,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 632 transitions, 8507 flow [2024-06-03 20:54:07,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 632 transitions, 8279 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 20:54:07,353 INFO L231 Difference]: Finished difference. Result has 435 places, 599 transitions, 7321 flow [2024-06-03 20:54:07,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6863, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7321, PETRI_PLACES=435, PETRI_TRANSITIONS=599} [2024-06-03 20:54:07,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-03 20:54:07,361 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 599 transitions, 7321 flow [2024-06-03 20:54:07,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:07,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:07,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:07,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-03 20:54:07,361 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 20:54:07,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:07,362 INFO L85 PathProgramCache]: Analyzing trace with hash 567359206, now seen corresponding path program 9 times [2024-06-03 20:54:07,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:07,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278667242] [2024-06-03 20:54:07,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:07,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:07,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:07,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278667242] [2024-06-03 20:54:07,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278667242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:07,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:07,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:54:07,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248288755] [2024-06-03 20:54:07,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:07,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:54:07,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:07,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:54:07,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:54:07,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:07,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 599 transitions, 7321 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:07,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:07,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:07,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:09,092 INFO L124 PetriNetUnfolderBase]: 3768/6386 cut-off events. [2024-06-03 20:54:09,092 INFO L125 PetriNetUnfolderBase]: For 763121/763127 co-relation queries the response was YES. [2024-06-03 20:54:09,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44409 conditions, 6386 events. 3768/6386 cut-off events. For 763121/763127 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 44528 event pairs, 700 based on Foata normal form. 20/6401 useless extension candidates. Maximal degree in co-relation 44212. Up to 5343 conditions per place. [2024-06-03 20:54:09,183 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 439 selfloop transitions, 186 changer transitions 0/632 dead transitions. [2024-06-03 20:54:09,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 632 transitions, 8737 flow [2024-06-03 20:54:09,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:54:09,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:54:09,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-03 20:54:09,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-03 20:54:09,185 INFO L175 Difference]: Start difference. First operand has 435 places, 599 transitions, 7321 flow. Second operand 8 states and 198 transitions. [2024-06-03 20:54:09,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 632 transitions, 8737 flow [2024-06-03 20:54:12,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 632 transitions, 8315 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-03 20:54:12,921 INFO L231 Difference]: Finished difference. Result has 435 places, 601 transitions, 7363 flow [2024-06-03 20:54:12,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6903, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7363, PETRI_PLACES=435, PETRI_TRANSITIONS=601} [2024-06-03 20:54:12,921 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-03 20:54:12,921 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 601 transitions, 7363 flow [2024-06-03 20:54:12,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:12,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:12,921 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, 1] [2024-06-03 20:54:12,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-03 20:54:12,922 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 20:54:12,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:12,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1606518928, now seen corresponding path program 10 times [2024-06-03 20:54:12,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:12,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507679041] [2024-06-03 20:54:12,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:12,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:13,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:13,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:13,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507679041] [2024-06-03 20:54:13,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507679041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:13,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:13,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:54:13,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461757448] [2024-06-03 20:54:13,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:13,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:54:13,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:13,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:54:13,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:54:13,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:13,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 601 transitions, 7363 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:13,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:13,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:13,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:14,498 INFO L124 PetriNetUnfolderBase]: 3775/6403 cut-off events. [2024-06-03 20:54:14,498 INFO L125 PetriNetUnfolderBase]: For 694791/694797 co-relation queries the response was YES. [2024-06-03 20:54:14,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43594 conditions, 6403 events. 3775/6403 cut-off events. For 694791/694797 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 44639 event pairs, 569 based on Foata normal form. 16/6414 useless extension candidates. Maximal degree in co-relation 43396. Up to 4818 conditions per place. [2024-06-03 20:54:14,600 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 421 selfloop transitions, 212 changer transitions 0/640 dead transitions. [2024-06-03 20:54:14,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 640 transitions, 9009 flow [2024-06-03 20:54:14,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:54:14,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:54:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-03 20:54:14,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-03 20:54:14,602 INFO L175 Difference]: Start difference. First operand has 435 places, 601 transitions, 7363 flow. Second operand 8 states and 205 transitions. [2024-06-03 20:54:14,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 640 transitions, 9009 flow [2024-06-03 20:54:18,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 640 transitions, 8587 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 20:54:18,408 INFO L231 Difference]: Finished difference. Result has 437 places, 602 transitions, 7419 flow [2024-06-03 20:54:18,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6949, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7419, PETRI_PLACES=437, PETRI_TRANSITIONS=602} [2024-06-03 20:54:18,408 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-03 20:54:18,408 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 602 transitions, 7419 flow [2024-06-03 20:54:18,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:18,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:18,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:18,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-03 20:54:18,409 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 20:54:18,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:18,409 INFO L85 PathProgramCache]: Analyzing trace with hash 874776472, now seen corresponding path program 2 times [2024-06-03 20:54:18,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:18,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6141111] [2024-06-03 20:54:18,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:18,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:18,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:18,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6141111] [2024-06-03 20:54:18,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6141111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:18,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:18,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:54:18,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489072812] [2024-06-03 20:54:18,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:18,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:54:18,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:18,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:54:18,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:54:18,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:18,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 602 transitions, 7419 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:18,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:18,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:18,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:20,066 INFO L124 PetriNetUnfolderBase]: 3815/6471 cut-off events. [2024-06-03 20:54:20,066 INFO L125 PetriNetUnfolderBase]: For 682659/682659 co-relation queries the response was YES. [2024-06-03 20:54:20,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43972 conditions, 6471 events. 3815/6471 cut-off events. For 682659/682659 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 45205 event pairs, 544 based on Foata normal form. 12/6480 useless extension candidates. Maximal degree in co-relation 43773. Up to 5512 conditions per place. [2024-06-03 20:54:20,167 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 522 selfloop transitions, 105 changer transitions 0/634 dead transitions. [2024-06-03 20:54:20,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 634 transitions, 8827 flow [2024-06-03 20:54:20,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:54:20,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:54:20,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-03 20:54:20,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-03 20:54:20,168 INFO L175 Difference]: Start difference. First operand has 437 places, 602 transitions, 7419 flow. Second operand 7 states and 179 transitions. [2024-06-03 20:54:20,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 634 transitions, 8827 flow [2024-06-03 20:54:24,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 634 transitions, 8417 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-03 20:54:24,215 INFO L231 Difference]: Finished difference. Result has 438 places, 604 transitions, 7286 flow [2024-06-03 20:54:24,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7009, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7286, PETRI_PLACES=438, PETRI_TRANSITIONS=604} [2024-06-03 20:54:24,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-03 20:54:24,216 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 604 transitions, 7286 flow [2024-06-03 20:54:24,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:24,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:24,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:24,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-03 20:54:24,216 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 20:54:24,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:24,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1991087692, now seen corresponding path program 3 times [2024-06-03 20:54:24,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:24,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399134468] [2024-06-03 20:54:24,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:24,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:24,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:24,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399134468] [2024-06-03 20:54:24,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399134468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:24,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:24,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:54:24,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960288212] [2024-06-03 20:54:24,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:24,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:54:24,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:24,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:54:24,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:54:24,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:24,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 604 transitions, 7286 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:24,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:24,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:24,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:25,889 INFO L124 PetriNetUnfolderBase]: 3855/6547 cut-off events. [2024-06-03 20:54:25,889 INFO L125 PetriNetUnfolderBase]: For 684704/684710 co-relation queries the response was YES. [2024-06-03 20:54:25,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43948 conditions, 6547 events. 3855/6547 cut-off events. For 684704/684710 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 45837 event pairs, 697 based on Foata normal form. 16/6558 useless extension candidates. Maximal degree in co-relation 43749. Up to 5236 conditions per place. [2024-06-03 20:54:26,000 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 432 selfloop transitions, 203 changer transitions 0/642 dead transitions. [2024-06-03 20:54:26,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 642 transitions, 8728 flow [2024-06-03 20:54:26,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:54:26,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:54:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-03 20:54:26,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-03 20:54:26,001 INFO L175 Difference]: Start difference. First operand has 438 places, 604 transitions, 7286 flow. Second operand 10 states and 238 transitions. [2024-06-03 20:54:26,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 642 transitions, 8728 flow [2024-06-03 20:54:29,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 642 transitions, 8473 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-03 20:54:29,576 INFO L231 Difference]: Finished difference. Result has 443 places, 606 transitions, 7511 flow [2024-06-03 20:54:29,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7031, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7511, PETRI_PLACES=443, PETRI_TRANSITIONS=606} [2024-06-03 20:54:29,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-03 20:54:29,577 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 606 transitions, 7511 flow [2024-06-03 20:54:29,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:29,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:29,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:29,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-03 20:54:29,577 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 20:54:29,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:29,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1793611426, now seen corresponding path program 4 times [2024-06-03 20:54:29,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:29,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577560568] [2024-06-03 20:54:29,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:29,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:29,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:29,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577560568] [2024-06-03 20:54:29,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577560568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:29,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:29,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:54:29,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840348923] [2024-06-03 20:54:29,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:29,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:54:29,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:29,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:54:29,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:54:29,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:29,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 606 transitions, 7511 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:29,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:29,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:29,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:31,290 INFO L124 PetriNetUnfolderBase]: 3908/6632 cut-off events. [2024-06-03 20:54:31,291 INFO L125 PetriNetUnfolderBase]: For 711943/711943 co-relation queries the response was YES. [2024-06-03 20:54:31,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45163 conditions, 6632 events. 3908/6632 cut-off events. For 711943/711943 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 46524 event pairs, 513 based on Foata normal form. 12/6641 useless extension candidates. Maximal degree in co-relation 44963. Up to 5338 conditions per place. [2024-06-03 20:54:31,398 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 527 selfloop transitions, 103 changer transitions 0/637 dead transitions. [2024-06-03 20:54:31,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 637 transitions, 9163 flow [2024-06-03 20:54:31,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:54:31,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:54:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 20:54:31,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-03 20:54:31,400 INFO L175 Difference]: Start difference. First operand has 443 places, 606 transitions, 7511 flow. Second operand 7 states and 176 transitions. [2024-06-03 20:54:31,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 637 transitions, 9163 flow [2024-06-03 20:54:35,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 637 transitions, 8703 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-03 20:54:35,886 INFO L231 Difference]: Finished difference. Result has 442 places, 608 transitions, 7338 flow [2024-06-03 20:54:35,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7057, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7338, PETRI_PLACES=442, PETRI_TRANSITIONS=608} [2024-06-03 20:54:35,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-03 20:54:35,886 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 608 transitions, 7338 flow [2024-06-03 20:54:35,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:35,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:35,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:35,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-03 20:54:35,887 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 20:54:35,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:35,887 INFO L85 PathProgramCache]: Analyzing trace with hash 2082397836, now seen corresponding path program 1 times [2024-06-03 20:54:35,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:35,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471215781] [2024-06-03 20:54:35,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:35,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:36,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:36,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:36,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471215781] [2024-06-03 20:54:36,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471215781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:36,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:36,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:54:36,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414499825] [2024-06-03 20:54:36,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:36,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:54:36,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:36,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:54:36,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:54:36,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:36,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 608 transitions, 7338 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:36,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:36,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:36,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:37,534 INFO L124 PetriNetUnfolderBase]: 3942/6679 cut-off events. [2024-06-03 20:54:37,534 INFO L125 PetriNetUnfolderBase]: For 672307/672313 co-relation queries the response was YES. [2024-06-03 20:54:37,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45569 conditions, 6679 events. 3942/6679 cut-off events. For 672307/672313 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 46889 event pairs, 735 based on Foata normal form. 2/6672 useless extension candidates. Maximal degree in co-relation 45368. Up to 5916 conditions per place. [2024-06-03 20:54:37,637 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 551 selfloop transitions, 82 changer transitions 0/640 dead transitions. [2024-06-03 20:54:37,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 640 transitions, 9070 flow [2024-06-03 20:54:37,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:54:37,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:54:37,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:54:37,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-03 20:54:37,638 INFO L175 Difference]: Start difference. First operand has 442 places, 608 transitions, 7338 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:54:37,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 640 transitions, 9070 flow [2024-06-03 20:54:42,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 640 transitions, 8933 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-03 20:54:42,408 INFO L231 Difference]: Finished difference. Result has 447 places, 614 transitions, 7563 flow [2024-06-03 20:54:42,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7201, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7563, PETRI_PLACES=447, PETRI_TRANSITIONS=614} [2024-06-03 20:54:42,408 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-03 20:54:42,408 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 614 transitions, 7563 flow [2024-06-03 20:54:42,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:42,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:42,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:42,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-03 20:54:42,409 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 20:54:42,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:42,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1883390644, now seen corresponding path program 2 times [2024-06-03 20:54:42,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:42,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401952034] [2024-06-03 20:54:42,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:42,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:42,614 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 20:54:42,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:42,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401952034] [2024-06-03 20:54:42,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401952034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:42,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:42,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:54:42,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037053161] [2024-06-03 20:54:42,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:42,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:54:42,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:42,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:54:42,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:54:42,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:42,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 614 transitions, 7563 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:42,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:42,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:42,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:44,035 INFO L124 PetriNetUnfolderBase]: 3950/6698 cut-off events. [2024-06-03 20:54:44,035 INFO L125 PetriNetUnfolderBase]: For 682356/682362 co-relation queries the response was YES. [2024-06-03 20:54:44,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45878 conditions, 6698 events. 3950/6698 cut-off events. For 682356/682362 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 47103 event pairs, 746 based on Foata normal form. 2/6693 useless extension candidates. Maximal degree in co-relation 45674. Up to 5970 conditions per place. [2024-06-03 20:54:44,136 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 553 selfloop transitions, 77 changer transitions 0/637 dead transitions. [2024-06-03 20:54:44,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 637 transitions, 8943 flow [2024-06-03 20:54:44,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:54:44,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:54:44,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 20:54:44,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-03 20:54:44,137 INFO L175 Difference]: Start difference. First operand has 447 places, 614 transitions, 7563 flow. Second operand 7 states and 166 transitions. [2024-06-03 20:54:44,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 637 transitions, 8943 flow [2024-06-03 20:54:48,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 637 transitions, 8717 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-03 20:54:48,260 INFO L231 Difference]: Finished difference. Result has 451 places, 616 transitions, 7568 flow [2024-06-03 20:54:48,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7365, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7568, PETRI_PLACES=451, PETRI_TRANSITIONS=616} [2024-06-03 20:54:48,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-03 20:54:48,261 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 616 transitions, 7568 flow [2024-06-03 20:54:48,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:48,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:48,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:48,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-03 20:54:48,262 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 20:54:48,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:48,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1050519324, now seen corresponding path program 3 times [2024-06-03 20:54:48,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:48,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965837244] [2024-06-03 20:54:48,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:48,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:48,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:48,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965837244] [2024-06-03 20:54:48,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965837244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:48,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:48,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:54:48,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404263359] [2024-06-03 20:54:48,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:48,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:54:48,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:48,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:54:48,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:54:48,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:48,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 616 transitions, 7568 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:48,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:48,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:48,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:50,101 INFO L124 PetriNetUnfolderBase]: 3984/6743 cut-off events. [2024-06-03 20:54:50,102 INFO L125 PetriNetUnfolderBase]: For 698317/698323 co-relation queries the response was YES. [2024-06-03 20:54:50,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46699 conditions, 6743 events. 3984/6743 cut-off events. For 698317/698323 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 47431 event pairs, 744 based on Foata normal form. 6/6741 useless extension candidates. Maximal degree in co-relation 46493. Up to 5978 conditions per place. [2024-06-03 20:54:50,200 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 560 selfloop transitions, 78 changer transitions 0/645 dead transitions. [2024-06-03 20:54:50,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 645 transitions, 9314 flow [2024-06-03 20:54:50,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:54:50,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:54:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 20:54:50,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-03 20:54:50,202 INFO L175 Difference]: Start difference. First operand has 451 places, 616 transitions, 7568 flow. Second operand 7 states and 166 transitions. [2024-06-03 20:54:50,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 645 transitions, 9314 flow [2024-06-03 20:54:54,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 645 transitions, 9133 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 20:54:54,489 INFO L231 Difference]: Finished difference. Result has 454 places, 622 transitions, 7753 flow [2024-06-03 20:54:54,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7387, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7753, PETRI_PLACES=454, PETRI_TRANSITIONS=622} [2024-06-03 20:54:54,490 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-03 20:54:54,490 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 622 transitions, 7753 flow [2024-06-03 20:54:54,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:54,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:54:54,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:54:54,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-03 20:54:54,491 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 20:54:54,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:54:54,491 INFO L85 PathProgramCache]: Analyzing trace with hash 852961804, now seen corresponding path program 4 times [2024-06-03 20:54:54,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:54:54,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80815237] [2024-06-03 20:54:54,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:54:54,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:54:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:54:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:54:54,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:54:54,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80815237] [2024-06-03 20:54:54,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80815237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:54:54,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:54:54,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:54:54,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973036044] [2024-06-03 20:54:54,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:54:54,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:54:54,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:54:54,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:54:54,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:54:54,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:54:54,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 622 transitions, 7753 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:54:54,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:54:54,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:54:54,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:54:56,200 INFO L124 PetriNetUnfolderBase]: 3992/6766 cut-off events. [2024-06-03 20:54:56,201 INFO L125 PetriNetUnfolderBase]: For 710862/710868 co-relation queries the response was YES. [2024-06-03 20:54:56,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47035 conditions, 6766 events. 3992/6766 cut-off events. For 710862/710868 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 47606 event pairs, 735 based on Foata normal form. 6/6767 useless extension candidates. Maximal degree in co-relation 46827. Up to 6110 conditions per place. [2024-06-03 20:54:56,498 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 597 selfloop transitions, 38 changer transitions 0/642 dead transitions. [2024-06-03 20:54:56,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 642 transitions, 9111 flow [2024-06-03 20:54:56,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:54:56,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:54:56,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-03 20:54:56,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:54:56,499 INFO L175 Difference]: Start difference. First operand has 454 places, 622 transitions, 7753 flow. Second operand 7 states and 161 transitions. [2024-06-03 20:54:56,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 642 transitions, 9111 flow [2024-06-03 20:55:02,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 642 transitions, 8913 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-03 20:55:02,085 INFO L231 Difference]: Finished difference. Result has 458 places, 624 transitions, 7684 flow [2024-06-03 20:55:02,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7555, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7684, PETRI_PLACES=458, PETRI_TRANSITIONS=624} [2024-06-03 20:55:02,085 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-03 20:55:02,085 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 624 transitions, 7684 flow [2024-06-03 20:55:02,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:02,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:02,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:02,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-03 20:55:02,086 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 20:55:02,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:02,086 INFO L85 PathProgramCache]: Analyzing trace with hash -199536406, now seen corresponding path program 5 times [2024-06-03 20:55:02,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:02,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130953029] [2024-06-03 20:55:02,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:02,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:02,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:02,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130953029] [2024-06-03 20:55:02,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130953029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:02,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:02,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:55:02,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400209908] [2024-06-03 20:55:02,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:02,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:55:02,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:02,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:55:02,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:55:02,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:55:02,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 624 transitions, 7684 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:02,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:02,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:55:02,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:03,752 INFO L124 PetriNetUnfolderBase]: 4000/6772 cut-off events. [2024-06-03 20:55:03,752 INFO L125 PetriNetUnfolderBase]: For 720872/720878 co-relation queries the response was YES. [2024-06-03 20:55:03,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47053 conditions, 6772 events. 4000/6772 cut-off events. For 720872/720878 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 47664 event pairs, 751 based on Foata normal form. 6/6770 useless extension candidates. Maximal degree in co-relation 46843. Up to 6044 conditions per place. [2024-06-03 20:55:03,869 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 564 selfloop transitions, 73 changer transitions 0/644 dead transitions. [2024-06-03 20:55:03,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 644 transitions, 9042 flow [2024-06-03 20:55:03,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:55:03,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:55:03,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-03 20:55:03,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:55:03,870 INFO L175 Difference]: Start difference. First operand has 458 places, 624 transitions, 7684 flow. Second operand 7 states and 161 transitions. [2024-06-03 20:55:03,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 644 transitions, 9042 flow [2024-06-03 20:55:07,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 644 transitions, 8935 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 20:55:07,716 INFO L231 Difference]: Finished difference. Result has 460 places, 626 transitions, 7772 flow [2024-06-03 20:55:07,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7577, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7772, PETRI_PLACES=460, PETRI_TRANSITIONS=626} [2024-06-03 20:55:07,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 417 predicate places. [2024-06-03 20:55:07,717 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 626 transitions, 7772 flow [2024-06-03 20:55:07,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:07,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:07,717 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, 1] [2024-06-03 20:55:07,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-03 20:55:07,717 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 20:55:07,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:07,718 INFO L85 PathProgramCache]: Analyzing trace with hash 842766450, now seen corresponding path program 6 times [2024-06-03 20:55:07,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:07,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692757982] [2024-06-03 20:55:07,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:07,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:07,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:07,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692757982] [2024-06-03 20:55:07,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692757982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:07,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:07,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:55:07,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325632459] [2024-06-03 20:55:07,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:07,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:55:07,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:07,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:55:07,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:55:07,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:55:07,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 626 transitions, 7772 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:07,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:07,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:55:07,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:09,433 INFO L124 PetriNetUnfolderBase]: 4008/6806 cut-off events. [2024-06-03 20:55:09,433 INFO L125 PetriNetUnfolderBase]: For 733330/733336 co-relation queries the response was YES. [2024-06-03 20:55:09,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47377 conditions, 6806 events. 4008/6806 cut-off events. For 733330/733336 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 47949 event pairs, 629 based on Foata normal form. 6/6804 useless extension candidates. Maximal degree in co-relation 47166. Up to 5799 conditions per place. [2024-06-03 20:55:09,560 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 539 selfloop transitions, 110 changer transitions 0/656 dead transitions. [2024-06-03 20:55:09,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 656 transitions, 9779 flow [2024-06-03 20:55:09,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:55:09,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:55:09,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-03 20:55:09,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:55:09,562 INFO L175 Difference]: Start difference. First operand has 460 places, 626 transitions, 7772 flow. Second operand 7 states and 168 transitions. [2024-06-03 20:55:09,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 656 transitions, 9779 flow [2024-06-03 20:55:14,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 656 transitions, 9606 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 20:55:14,228 INFO L231 Difference]: Finished difference. Result has 463 places, 631 transitions, 8022 flow [2024-06-03 20:55:14,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7599, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8022, PETRI_PLACES=463, PETRI_TRANSITIONS=631} [2024-06-03 20:55:14,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-03 20:55:14,229 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 631 transitions, 8022 flow [2024-06-03 20:55:14,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:14,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:14,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:14,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-03 20:55:14,229 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 20:55:14,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:14,230 INFO L85 PathProgramCache]: Analyzing trace with hash 371847402, now seen corresponding path program 7 times [2024-06-03 20:55:14,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:14,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080130484] [2024-06-03 20:55:14,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:14,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:14,462 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 20:55:14,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:14,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080130484] [2024-06-03 20:55:14,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080130484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:14,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:14,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:55:14,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196207406] [2024-06-03 20:55:14,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:14,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:55:14,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:14,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:55:14,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:55:14,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:55:14,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 631 transitions, 8022 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:14,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:14,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:55:14,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:16,235 INFO L124 PetriNetUnfolderBase]: 4016/6817 cut-off events. [2024-06-03 20:55:16,235 INFO L125 PetriNetUnfolderBase]: For 747942/747948 co-relation queries the response was YES. [2024-06-03 20:55:16,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47938 conditions, 6817 events. 4016/6817 cut-off events. For 747942/747948 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 48093 event pairs, 632 based on Foata normal form. 6/6815 useless extension candidates. Maximal degree in co-relation 47725. Up to 5807 conditions per place. [2024-06-03 20:55:16,332 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 536 selfloop transitions, 111 changer transitions 0/654 dead transitions. [2024-06-03 20:55:16,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 654 transitions, 9678 flow [2024-06-03 20:55:16,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:55:16,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:55:16,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 20:55:16,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-03 20:55:16,333 INFO L175 Difference]: Start difference. First operand has 463 places, 631 transitions, 8022 flow. Second operand 7 states and 164 transitions. [2024-06-03 20:55:16,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 654 transitions, 9678 flow [2024-06-03 20:55:20,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 654 transitions, 9255 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-03 20:55:20,617 INFO L231 Difference]: Finished difference. Result has 465 places, 633 transitions, 7902 flow [2024-06-03 20:55:20,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7635, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7902, PETRI_PLACES=465, PETRI_TRANSITIONS=633} [2024-06-03 20:55:20,618 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-03 20:55:20,618 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 633 transitions, 7902 flow [2024-06-03 20:55:20,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:20,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:20,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:20,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-03 20:55:20,619 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 20:55:20,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:20,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1177581334, now seen corresponding path program 8 times [2024-06-03 20:55:20,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:20,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076716028] [2024-06-03 20:55:20,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:20,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:20,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:20,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076716028] [2024-06-03 20:55:20,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076716028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:20,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:20,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:55:20,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706386183] [2024-06-03 20:55:20,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:20,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:55:20,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:20,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:55:20,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:55:20,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:55:20,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 633 transitions, 7902 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:20,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:20,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:55:20,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:22,533 INFO L124 PetriNetUnfolderBase]: 4037/6843 cut-off events. [2024-06-03 20:55:22,533 INFO L125 PetriNetUnfolderBase]: For 769623/769629 co-relation queries the response was YES. [2024-06-03 20:55:22,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48003 conditions, 6843 events. 4037/6843 cut-off events. For 769623/769629 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48364 event pairs, 752 based on Foata normal form. 6/6837 useless extension candidates. Maximal degree in co-relation 47790. Up to 6064 conditions per place. [2024-06-03 20:55:22,635 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 567 selfloop transitions, 80 changer transitions 0/654 dead transitions. [2024-06-03 20:55:22,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 654 transitions, 9566 flow [2024-06-03 20:55:22,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:55:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:55:22,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-03 20:55:22,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-06-03 20:55:22,637 INFO L175 Difference]: Start difference. First operand has 465 places, 633 transitions, 7902 flow. Second operand 7 states and 160 transitions. [2024-06-03 20:55:22,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 654 transitions, 9566 flow [2024-06-03 20:55:26,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 654 transitions, 9362 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-03 20:55:26,344 INFO L231 Difference]: Finished difference. Result has 469 places, 637 transitions, 7976 flow [2024-06-03 20:55:26,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7702, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7976, PETRI_PLACES=469, PETRI_TRANSITIONS=637} [2024-06-03 20:55:26,344 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-03 20:55:26,344 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 637 transitions, 7976 flow [2024-06-03 20:55:26,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:26,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:26,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:26,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-03 20:55:26,345 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 20:55:26,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:26,345 INFO L85 PathProgramCache]: Analyzing trace with hash 931421490, now seen corresponding path program 9 times [2024-06-03 20:55:26,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:26,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208012585] [2024-06-03 20:55:26,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:26,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:26,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:26,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208012585] [2024-06-03 20:55:26,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208012585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:26,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:26,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:55:26,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179454176] [2024-06-03 20:55:26,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:26,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:55:26,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:26,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:55:26,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:55:26,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:55:26,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 637 transitions, 7976 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:26,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:26,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:55:26,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:28,388 INFO L124 PetriNetUnfolderBase]: 4032/6840 cut-off events. [2024-06-03 20:55:28,389 INFO L125 PetriNetUnfolderBase]: For 767264/767270 co-relation queries the response was YES. [2024-06-03 20:55:28,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47666 conditions, 6840 events. 4032/6840 cut-off events. For 767264/767270 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48335 event pairs, 757 based on Foata normal form. 6/6838 useless extension candidates. Maximal degree in co-relation 47451. Up to 6092 conditions per place. [2024-06-03 20:55:28,493 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 573 selfloop transitions, 72 changer transitions 0/652 dead transitions. [2024-06-03 20:55:28,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 652 transitions, 9302 flow [2024-06-03 20:55:28,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:55:28,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:55:28,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-03 20:55:28,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374149659863946 [2024-06-03 20:55:28,495 INFO L175 Difference]: Start difference. First operand has 469 places, 637 transitions, 7976 flow. Second operand 7 states and 158 transitions. [2024-06-03 20:55:28,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 652 transitions, 9302 flow [2024-06-03 20:55:32,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 652 transitions, 9098 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-03 20:55:32,590 INFO L231 Difference]: Finished difference. Result has 472 places, 637 transitions, 7921 flow [2024-06-03 20:55:32,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7772, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7921, PETRI_PLACES=472, PETRI_TRANSITIONS=637} [2024-06-03 20:55:32,590 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-03 20:55:32,593 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 637 transitions, 7921 flow [2024-06-03 20:55:32,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:32,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:32,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:32,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-03 20:55:32,593 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 20:55:32,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:32,594 INFO L85 PathProgramCache]: Analyzing trace with hash -115096086, now seen corresponding path program 10 times [2024-06-03 20:55:32,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:32,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745309705] [2024-06-03 20:55:32,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:32,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:32,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:32,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:32,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745309705] [2024-06-03 20:55:32,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745309705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:32,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:32,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:55:32,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557187659] [2024-06-03 20:55:32,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:32,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:55:32,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:32,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:55:32,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:55:32,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:55:32,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 637 transitions, 7921 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:32,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:32,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:55:32,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:34,729 INFO L124 PetriNetUnfolderBase]: 4022/6821 cut-off events. [2024-06-03 20:55:34,729 INFO L125 PetriNetUnfolderBase]: For 763519/763525 co-relation queries the response was YES. [2024-06-03 20:55:34,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47027 conditions, 6821 events. 4022/6821 cut-off events. For 763519/763525 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48206 event pairs, 748 based on Foata normal form. 8/6821 useless extension candidates. Maximal degree in co-relation 46811. Up to 6069 conditions per place. [2024-06-03 20:55:34,832 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 584 selfloop transitions, 66 changer transitions 0/657 dead transitions. [2024-06-03 20:55:34,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 657 transitions, 9271 flow [2024-06-03 20:55:34,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:55:34,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:55:34,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-03 20:55:34,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 20:55:34,834 INFO L175 Difference]: Start difference. First operand has 472 places, 637 transitions, 7921 flow. Second operand 6 states and 147 transitions. [2024-06-03 20:55:34,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 657 transitions, 9271 flow [2024-06-03 20:55:38,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 657 transitions, 9069 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 20:55:38,997 INFO L231 Difference]: Finished difference. Result has 472 places, 637 transitions, 7862 flow [2024-06-03 20:55:38,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7719, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7862, PETRI_PLACES=472, PETRI_TRANSITIONS=637} [2024-06-03 20:55:38,998 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-03 20:55:38,998 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 637 transitions, 7862 flow [2024-06-03 20:55:38,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:38,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:38,998 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, 1] [2024-06-03 20:55:38,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-03 20:55:38,998 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 20:55:38,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:38,999 INFO L85 PathProgramCache]: Analyzing trace with hash -105572886, now seen corresponding path program 11 times [2024-06-03 20:55:38,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:38,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146457052] [2024-06-03 20:55:38,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:38,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:39,263 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 20:55:39,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:39,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146457052] [2024-06-03 20:55:39,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146457052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:39,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:39,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:55:39,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871613368] [2024-06-03 20:55:39,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:39,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:55:39,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:39,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:55:39,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:55:39,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:55:39,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 637 transitions, 7862 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:39,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:39,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:55:39,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:41,088 INFO L124 PetriNetUnfolderBase]: 4012/6822 cut-off events. [2024-06-03 20:55:41,088 INFO L125 PetriNetUnfolderBase]: For 744828/744834 co-relation queries the response was YES. [2024-06-03 20:55:41,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46467 conditions, 6822 events. 4012/6822 cut-off events. For 744828/744834 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48218 event pairs, 633 based on Foata normal form. 8/6822 useless extension candidates. Maximal degree in co-relation 46250. Up to 5908 conditions per place. [2024-06-03 20:55:41,200 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 564 selfloop transitions, 88 changer transitions 0/659 dead transitions. [2024-06-03 20:55:41,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 659 transitions, 9464 flow [2024-06-03 20:55:41,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:55:41,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:55:41,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 20:55:41,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-03 20:55:41,201 INFO L175 Difference]: Start difference. First operand has 472 places, 637 transitions, 7862 flow. Second operand 6 states and 149 transitions. [2024-06-03 20:55:41,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 659 transitions, 9464 flow [2024-06-03 20:55:45,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 659 transitions, 9261 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 20:55:45,412 INFO L231 Difference]: Finished difference. Result has 472 places, 637 transitions, 7846 flow [2024-06-03 20:55:45,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7659, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7846, PETRI_PLACES=472, PETRI_TRANSITIONS=637} [2024-06-03 20:55:45,413 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-03 20:55:45,413 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 637 transitions, 7846 flow [2024-06-03 20:55:45,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:45,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:45,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:45,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-03 20:55:45,414 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 20:55:45,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:45,414 INFO L85 PathProgramCache]: Analyzing trace with hash -371596596, now seen corresponding path program 12 times [2024-06-03 20:55:45,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:45,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259061053] [2024-06-03 20:55:45,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:45,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:45,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:45,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259061053] [2024-06-03 20:55:45,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259061053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:45,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:45,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:55:45,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734665358] [2024-06-03 20:55:45,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:45,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:55:45,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:45,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:55:45,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:55:45,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:55:45,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 637 transitions, 7846 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:45,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:45,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:55:45,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:47,382 INFO L124 PetriNetUnfolderBase]: 4002/6799 cut-off events. [2024-06-03 20:55:47,382 INFO L125 PetriNetUnfolderBase]: For 725937/725943 co-relation queries the response was YES. [2024-06-03 20:55:47,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45952 conditions, 6799 events. 4002/6799 cut-off events. For 725937/725943 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 48087 event pairs, 728 based on Foata normal form. 8/6802 useless extension candidates. Maximal degree in co-relation 45735. Up to 6035 conditions per place. [2024-06-03 20:55:47,482 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 585 selfloop transitions, 76 changer transitions 0/668 dead transitions. [2024-06-03 20:55:47,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 668 transitions, 9246 flow [2024-06-03 20:55:47,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:55:47,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:55:47,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-03 20:55:47,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-03 20:55:47,483 INFO L175 Difference]: Start difference. First operand has 472 places, 637 transitions, 7846 flow. Second operand 8 states and 195 transitions. [2024-06-03 20:55:47,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 668 transitions, 9246 flow [2024-06-03 20:55:52,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 668 transitions, 8995 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 20:55:52,811 INFO L231 Difference]: Finished difference. Result has 475 places, 637 transitions, 7761 flow [2024-06-03 20:55:52,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7595, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7761, PETRI_PLACES=475, PETRI_TRANSITIONS=637} [2024-06-03 20:55:52,812 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-03 20:55:52,812 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 637 transitions, 7761 flow [2024-06-03 20:55:52,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:52,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:52,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:55:52,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-03 20:55:52,813 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 20:55:52,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:52,813 INFO L85 PathProgramCache]: Analyzing trace with hash 71416902, now seen corresponding path program 3 times [2024-06-03 20:55:52,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:52,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363318549] [2024-06-03 20:55:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:52,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:53,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:53,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363318549] [2024-06-03 20:55:53,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363318549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:53,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:53,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:55:53,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426874710] [2024-06-03 20:55:53,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:53,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:55:53,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:53,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:55:53,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:55:53,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:55:53,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 637 transitions, 7761 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:53,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:53,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:55:53,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:55:54,764 INFO L124 PetriNetUnfolderBase]: 4010/6809 cut-off events. [2024-06-03 20:55:54,764 INFO L125 PetriNetUnfolderBase]: For 721004/721004 co-relation queries the response was YES. [2024-06-03 20:55:54,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46037 conditions, 6809 events. 4010/6809 cut-off events. For 721004/721004 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 48192 event pairs, 748 based on Foata normal form. 2/6804 useless extension candidates. Maximal degree in co-relation 45819. Up to 6088 conditions per place. [2024-06-03 20:55:54,869 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 581 selfloop transitions, 67 changer transitions 0/655 dead transitions. [2024-06-03 20:55:54,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 655 transitions, 9175 flow [2024-06-03 20:55:54,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:55:54,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:55:54,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-03 20:55:54,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5327380952380952 [2024-06-03 20:55:54,871 INFO L175 Difference]: Start difference. First operand has 475 places, 637 transitions, 7761 flow. Second operand 8 states and 179 transitions. [2024-06-03 20:55:54,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 655 transitions, 9175 flow [2024-06-03 20:55:59,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 655 transitions, 8982 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-03 20:55:59,355 INFO L231 Difference]: Finished difference. Result has 475 places, 639 transitions, 7791 flow [2024-06-03 20:55:59,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7568, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7791, PETRI_PLACES=475, PETRI_TRANSITIONS=639} [2024-06-03 20:55:59,355 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-03 20:55:59,356 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 639 transitions, 7791 flow [2024-06-03 20:55:59,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:59,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:55:59,356 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] [2024-06-03 20:55:59,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-03 20:55:59,356 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 20:55:59,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:55:59,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2094223558, now seen corresponding path program 4 times [2024-06-03 20:55:59,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:55:59,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965369337] [2024-06-03 20:55:59,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:55:59,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:55:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:55:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:55:59,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:55:59,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965369337] [2024-06-03 20:55:59,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965369337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:55:59,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:55:59,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:55:59,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965117800] [2024-06-03 20:55:59,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:55:59,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:55:59,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:55:59,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:55:59,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:55:59,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:55:59,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 639 transitions, 7791 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:55:59,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:55:59,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:55:59,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:01,420 INFO L124 PetriNetUnfolderBase]: 4018/6817 cut-off events. [2024-06-03 20:56:01,421 INFO L125 PetriNetUnfolderBase]: For 722666/722666 co-relation queries the response was YES. [2024-06-03 20:56:01,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46189 conditions, 6817 events. 4018/6817 cut-off events. For 722666/722666 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 48147 event pairs, 742 based on Foata normal form. 2/6812 useless extension candidates. Maximal degree in co-relation 45970. Up to 6080 conditions per place. [2024-06-03 20:56:01,527 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 580 selfloop transitions, 72 changer transitions 0/659 dead transitions. [2024-06-03 20:56:01,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 659 transitions, 9221 flow [2024-06-03 20:56:01,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:56:01,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:56:01,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-03 20:56:01,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-03 20:56:01,528 INFO L175 Difference]: Start difference. First operand has 475 places, 639 transitions, 7791 flow. Second operand 9 states and 198 transitions. [2024-06-03 20:56:01,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 659 transitions, 9221 flow [2024-06-03 20:56:05,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 659 transitions, 9014 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-03 20:56:05,709 INFO L231 Difference]: Finished difference. Result has 478 places, 641 transitions, 7821 flow [2024-06-03 20:56:05,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7584, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7821, PETRI_PLACES=478, PETRI_TRANSITIONS=641} [2024-06-03 20:56:05,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-03 20:56:05,710 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 641 transitions, 7821 flow [2024-06-03 20:56:05,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:05,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:05,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:56:05,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-03 20:56:05,711 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 20:56:05,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:05,711 INFO L85 PathProgramCache]: Analyzing trace with hash 943035620, now seen corresponding path program 5 times [2024-06-03 20:56:05,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:05,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572850191] [2024-06-03 20:56:05,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:05,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:05,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:05,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572850191] [2024-06-03 20:56:05,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572850191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:05,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:05,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:56:05,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878247405] [2024-06-03 20:56:05,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:05,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:56:05,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:05,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:56:05,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:56:05,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:56:05,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 641 transitions, 7821 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:05,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:05,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:56:05,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:07,743 INFO L124 PetriNetUnfolderBase]: 4026/6842 cut-off events. [2024-06-03 20:56:07,743 INFO L125 PetriNetUnfolderBase]: For 735751/735757 co-relation queries the response was YES. [2024-06-03 20:56:07,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46422 conditions, 6842 events. 4026/6842 cut-off events. For 735751/735757 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 48449 event pairs, 744 based on Foata normal form. 6/6843 useless extension candidates. Maximal degree in co-relation 46202. Up to 6106 conditions per place. [2024-06-03 20:56:07,844 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 584 selfloop transitions, 70 changer transitions 0/661 dead transitions. [2024-06-03 20:56:07,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 661 transitions, 9261 flow [2024-06-03 20:56:07,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:56:07,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:56:07,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 20:56:07,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-03 20:56:07,845 INFO L175 Difference]: Start difference. First operand has 478 places, 641 transitions, 7821 flow. Second operand 7 states and 163 transitions. [2024-06-03 20:56:07,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 661 transitions, 9261 flow [2024-06-03 20:56:12,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 661 transitions, 9040 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-03 20:56:12,462 INFO L231 Difference]: Finished difference. Result has 478 places, 643 transitions, 7840 flow [2024-06-03 20:56:12,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7600, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7840, PETRI_PLACES=478, PETRI_TRANSITIONS=643} [2024-06-03 20:56:12,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 435 predicate places. [2024-06-03 20:56:12,462 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 643 transitions, 7840 flow [2024-06-03 20:56:12,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:12,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:12,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:56:12,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-03 20:56:12,463 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 20:56:12,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:12,463 INFO L85 PathProgramCache]: Analyzing trace with hash 951606500, now seen corresponding path program 6 times [2024-06-03 20:56:12,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:12,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789616450] [2024-06-03 20:56:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:12,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:12,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:12,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789616450] [2024-06-03 20:56:12,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789616450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:12,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:12,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:56:12,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080215939] [2024-06-03 20:56:12,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:12,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:56:12,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:12,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:56:12,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:56:12,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:56:12,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 643 transitions, 7840 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:12,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:12,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:56:12,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:14,320 INFO L124 PetriNetUnfolderBase]: 4034/6846 cut-off events. [2024-06-03 20:56:14,321 INFO L125 PetriNetUnfolderBase]: For 747535/747541 co-relation queries the response was YES. [2024-06-03 20:56:14,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46609 conditions, 6846 events. 4034/6846 cut-off events. For 747535/747541 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 48396 event pairs, 732 based on Foata normal form. 6/6847 useless extension candidates. Maximal degree in co-relation 46388. Up to 6078 conditions per place. [2024-06-03 20:56:14,428 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 578 selfloop transitions, 80 changer transitions 0/665 dead transitions. [2024-06-03 20:56:14,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 665 transitions, 9296 flow [2024-06-03 20:56:14,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:56:14,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:56:14,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-03 20:56:14,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-03 20:56:14,429 INFO L175 Difference]: Start difference. First operand has 478 places, 643 transitions, 7840 flow. Second operand 8 states and 182 transitions. [2024-06-03 20:56:14,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 665 transitions, 9296 flow [2024-06-03 20:56:19,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 665 transitions, 9082 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-03 20:56:19,264 INFO L231 Difference]: Finished difference. Result has 481 places, 645 transitions, 7890 flow [2024-06-03 20:56:19,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7626, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7890, PETRI_PLACES=481, PETRI_TRANSITIONS=645} [2024-06-03 20:56:19,265 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 438 predicate places. [2024-06-03 20:56:19,265 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 645 transitions, 7890 flow [2024-06-03 20:56:19,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:19,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:19,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:56:19,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-03 20:56:19,266 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 20:56:19,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:19,266 INFO L85 PathProgramCache]: Analyzing trace with hash -2126275932, now seen corresponding path program 7 times [2024-06-03 20:56:19,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:19,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272645763] [2024-06-03 20:56:19,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:19,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:19,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:19,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272645763] [2024-06-03 20:56:19,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272645763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:19,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:19,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:56:19,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064330538] [2024-06-03 20:56:19,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:19,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:56:19,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:19,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:56:19,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:56:19,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:56:19,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 645 transitions, 7890 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:19,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:19,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:56:19,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:21,126 INFO L124 PetriNetUnfolderBase]: 4042/6861 cut-off events. [2024-06-03 20:56:21,126 INFO L125 PetriNetUnfolderBase]: For 758689/758689 co-relation queries the response was YES. [2024-06-03 20:56:21,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46874 conditions, 6861 events. 4042/6861 cut-off events. For 758689/758689 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 48598 event pairs, 751 based on Foata normal form. 2/6856 useless extension candidates. Maximal degree in co-relation 46652. Up to 6130 conditions per place. [2024-06-03 20:56:21,235 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 585 selfloop transitions, 70 changer transitions 0/662 dead transitions. [2024-06-03 20:56:21,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 662 transitions, 9332 flow [2024-06-03 20:56:21,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:56:21,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:56:21,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-03 20:56:21,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-06-03 20:56:21,237 INFO L175 Difference]: Start difference. First operand has 481 places, 645 transitions, 7890 flow. Second operand 7 states and 160 transitions. [2024-06-03 20:56:21,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 662 transitions, 9332 flow [2024-06-03 20:56:25,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 662 transitions, 9094 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-03 20:56:25,947 INFO L231 Difference]: Finished difference. Result has 482 places, 647 transitions, 7900 flow [2024-06-03 20:56:25,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7652, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7900, PETRI_PLACES=482, PETRI_TRANSITIONS=647} [2024-06-03 20:56:25,958 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 439 predicate places. [2024-06-03 20:56:25,958 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 647 transitions, 7900 flow [2024-06-03 20:56:25,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:25,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:25,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:56:25,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-03 20:56:25,961 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 20:56:25,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:25,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2125828602, now seen corresponding path program 8 times [2024-06-03 20:56:25,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:25,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545757106] [2024-06-03 20:56:25,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:25,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:26,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:26,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545757106] [2024-06-03 20:56:26,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545757106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:26,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:26,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:56:26,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776094462] [2024-06-03 20:56:26,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:26,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:56:26,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:26,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:56:26,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:56:26,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:56:26,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 647 transitions, 7900 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:26,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:26,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:56:26,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:28,078 INFO L124 PetriNetUnfolderBase]: 4037/6838 cut-off events. [2024-06-03 20:56:28,078 INFO L125 PetriNetUnfolderBase]: For 752344/752344 co-relation queries the response was YES. [2024-06-03 20:56:28,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46443 conditions, 6838 events. 4037/6838 cut-off events. For 752344/752344 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 48309 event pairs, 738 based on Foata normal form. 2/6833 useless extension candidates. Maximal degree in co-relation 46220. Up to 6083 conditions per place. [2024-06-03 20:56:28,189 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 579 selfloop transitions, 80 changer transitions 0/666 dead transitions. [2024-06-03 20:56:28,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 666 transitions, 9358 flow [2024-06-03 20:56:28,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:56:28,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:56:28,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-03 20:56:28,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5327380952380952 [2024-06-03 20:56:28,190 INFO L175 Difference]: Start difference. First operand has 482 places, 647 transitions, 7900 flow. Second operand 8 states and 179 transitions. [2024-06-03 20:56:28,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 666 transitions, 9358 flow [2024-06-03 20:56:33,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 666 transitions, 9126 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-03 20:56:33,672 INFO L231 Difference]: Finished difference. Result has 485 places, 649 transitions, 7940 flow [2024-06-03 20:56:33,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7672, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7940, PETRI_PLACES=485, PETRI_TRANSITIONS=649} [2024-06-03 20:56:33,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 442 predicate places. [2024-06-03 20:56:33,673 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 649 transitions, 7940 flow [2024-06-03 20:56:33,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:33,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:33,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:56:33,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-03 20:56:33,673 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 20:56:33,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:33,674 INFO L85 PathProgramCache]: Analyzing trace with hash 760878703, now seen corresponding path program 1 times [2024-06-03 20:56:33,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:33,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435855794] [2024-06-03 20:56:33,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:33,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:34,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:34,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435855794] [2024-06-03 20:56:34,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435855794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:34,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:34,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:56:34,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892093329] [2024-06-03 20:56:34,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:34,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:56:34,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:34,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:56:34,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:56:34,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:56:34,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 649 transitions, 7940 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:34,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:34,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:56:34,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:35,845 INFO L124 PetriNetUnfolderBase]: 4058/6890 cut-off events. [2024-06-03 20:56:35,846 INFO L125 PetriNetUnfolderBase]: For 759490/759496 co-relation queries the response was YES. [2024-06-03 20:56:35,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46769 conditions, 6890 events. 4058/6890 cut-off events. For 759490/759496 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 48835 event pairs, 777 based on Foata normal form. 1/6884 useless extension candidates. Maximal degree in co-relation 46545. Up to 5647 conditions per place. [2024-06-03 20:56:35,969 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 401 selfloop transitions, 283 changer transitions 0/691 dead transitions. [2024-06-03 20:56:35,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 691 transitions, 9998 flow [2024-06-03 20:56:35,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:56:35,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:56:35,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-03 20:56:35,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-03 20:56:35,970 INFO L175 Difference]: Start difference. First operand has 485 places, 649 transitions, 7940 flow. Second operand 9 states and 222 transitions. [2024-06-03 20:56:35,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 691 transitions, 9998 flow [2024-06-03 20:56:41,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 691 transitions, 9746 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-03 20:56:41,610 INFO L231 Difference]: Finished difference. Result has 488 places, 658 transitions, 8366 flow [2024-06-03 20:56:41,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7692, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8366, PETRI_PLACES=488, PETRI_TRANSITIONS=658} [2024-06-03 20:56:41,611 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-03 20:56:41,611 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 658 transitions, 8366 flow [2024-06-03 20:56:41,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:41,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:41,620 INFO L208 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 20:56:41,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-03 20:56:41,620 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 20:56:41,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:41,620 INFO L85 PathProgramCache]: Analyzing trace with hash -760499375, now seen corresponding path program 2 times [2024-06-03 20:56:41,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:41,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221769172] [2024-06-03 20:56:41,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:41,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:41,963 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 20:56:41,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:41,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221769172] [2024-06-03 20:56:41,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221769172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:41,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:41,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:56:41,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664197841] [2024-06-03 20:56:41,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:41,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:56:41,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:41,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:56:41,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:56:42,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:56:42,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 658 transitions, 8366 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:42,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:42,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:56:42,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:43,697 INFO L124 PetriNetUnfolderBase]: 4071/6914 cut-off events. [2024-06-03 20:56:43,698 INFO L125 PetriNetUnfolderBase]: For 768888/768894 co-relation queries the response was YES. [2024-06-03 20:56:43,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47979 conditions, 6914 events. 4071/6914 cut-off events. For 768888/768894 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 49097 event pairs, 748 based on Foata normal form. 5/6914 useless extension candidates. Maximal degree in co-relation 47754. Up to 5991 conditions per place. [2024-06-03 20:56:43,814 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 504 selfloop transitions, 188 changer transitions 0/699 dead transitions. [2024-06-03 20:56:43,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 699 transitions, 10168 flow [2024-06-03 20:56:43,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:56:43,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:56:43,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 272 transitions. [2024-06-03 20:56:43,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-03 20:56:43,815 INFO L175 Difference]: Start difference. First operand has 488 places, 658 transitions, 8366 flow. Second operand 12 states and 272 transitions. [2024-06-03 20:56:43,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 699 transitions, 10168 flow [2024-06-03 20:56:49,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 699 transitions, 9845 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-03 20:56:49,574 INFO L231 Difference]: Finished difference. Result has 496 places, 664 transitions, 8507 flow [2024-06-03 20:56:49,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8075, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8507, PETRI_PLACES=496, PETRI_TRANSITIONS=664} [2024-06-03 20:56:49,574 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 453 predicate places. [2024-06-03 20:56:49,574 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 664 transitions, 8507 flow [2024-06-03 20:56:49,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:49,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:49,575 INFO L208 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 20:56:49,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-03 20:56:49,575 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 20:56:49,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:49,575 INFO L85 PathProgramCache]: Analyzing trace with hash -760504955, now seen corresponding path program 3 times [2024-06-03 20:56:49,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:49,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581034171] [2024-06-03 20:56:49,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:49,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:49,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:49,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581034171] [2024-06-03 20:56:49,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581034171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:49,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:49,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:56:49,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299656001] [2024-06-03 20:56:49,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:49,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:56:49,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:49,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:56:49,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:56:49,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:56:49,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 664 transitions, 8507 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:49,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:49,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:56:49,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:56:51,655 INFO L124 PetriNetUnfolderBase]: 4068/6910 cut-off events. [2024-06-03 20:56:51,656 INFO L125 PetriNetUnfolderBase]: For 771643/771649 co-relation queries the response was YES. [2024-06-03 20:56:51,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48244 conditions, 6910 events. 4068/6910 cut-off events. For 771643/771649 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 49005 event pairs, 748 based on Foata normal form. 5/6910 useless extension candidates. Maximal degree in co-relation 48017. Up to 5988 conditions per place. [2024-06-03 20:56:51,767 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 502 selfloop transitions, 187 changer transitions 0/696 dead transitions. [2024-06-03 20:56:51,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 696 transitions, 9965 flow [2024-06-03 20:56:51,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:56:51,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:56:51,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-03 20:56:51,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-03 20:56:51,768 INFO L175 Difference]: Start difference. First operand has 496 places, 664 transitions, 8507 flow. Second operand 10 states and 237 transitions. [2024-06-03 20:56:51,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 696 transitions, 9965 flow [2024-06-03 20:56:58,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 696 transitions, 9717 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-03 20:56:58,231 INFO L231 Difference]: Finished difference. Result has 498 places, 664 transitions, 8639 flow [2024-06-03 20:56:58,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8259, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8639, PETRI_PLACES=498, PETRI_TRANSITIONS=664} [2024-06-03 20:56:58,232 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 455 predicate places. [2024-06-03 20:56:58,232 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 664 transitions, 8639 flow [2024-06-03 20:56:58,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:58,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:56:58,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:56:58,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-03 20:56:58,233 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 20:56:58,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:56:58,233 INFO L85 PathProgramCache]: Analyzing trace with hash 55399983, now seen corresponding path program 4 times [2024-06-03 20:56:58,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:56:58,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425224488] [2024-06-03 20:56:58,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:56:58,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:56:58,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:56:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:56:58,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:56:58,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425224488] [2024-06-03 20:56:58,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425224488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:56:58,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:56:58,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:56:58,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579878049] [2024-06-03 20:56:58,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:56:58,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:56:58,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:56:58,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:56:58,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:56:58,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:56:58,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 664 transitions, 8639 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:56:58,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:56:58,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:56:58,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:57:00,354 INFO L124 PetriNetUnfolderBase]: 4089/6945 cut-off events. [2024-06-03 20:57:00,355 INFO L125 PetriNetUnfolderBase]: For 799664/799670 co-relation queries the response was YES. [2024-06-03 20:57:00,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49098 conditions, 6945 events. 4089/6945 cut-off events. For 799664/799670 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 49282 event pairs, 748 based on Foata normal form. 5/6945 useless extension candidates. Maximal degree in co-relation 48869. Up to 5996 conditions per place. [2024-06-03 20:57:00,475 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 502 selfloop transitions, 201 changer transitions 0/710 dead transitions. [2024-06-03 20:57:00,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 710 transitions, 10739 flow [2024-06-03 20:57:00,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:57:00,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:57:00,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 297 transitions. [2024-06-03 20:57:00,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439560439560439 [2024-06-03 20:57:00,477 INFO L175 Difference]: Start difference. First operand has 498 places, 664 transitions, 8639 flow. Second operand 13 states and 297 transitions. [2024-06-03 20:57:00,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 710 transitions, 10739 flow [2024-06-03 20:57:05,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 710 transitions, 10365 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-03 20:57:05,972 INFO L231 Difference]: Finished difference. Result has 503 places, 673 transitions, 8786 flow [2024-06-03 20:57:05,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8265, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8786, PETRI_PLACES=503, PETRI_TRANSITIONS=673} [2024-06-03 20:57:05,972 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 460 predicate places. [2024-06-03 20:57:05,972 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 673 transitions, 8786 flow [2024-06-03 20:57:05,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:57:05,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:57:05,973 INFO L208 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 20:57:05,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-03 20:57:05,973 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 20:57:05,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:57:05,973 INFO L85 PathProgramCache]: Analyzing trace with hash 435610449, now seen corresponding path program 5 times [2024-06-03 20:57:05,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:57:05,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753764913] [2024-06-03 20:57:05,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:57:05,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:57:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:57:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:57:06,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:57:06,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753764913] [2024-06-03 20:57:06,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753764913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:57:06,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:57:06,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:57:06,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599778506] [2024-06-03 20:57:06,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:57:06,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:57:06,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:57:06,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:57:06,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:57:06,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:57:06,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 673 transitions, 8786 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:57:06,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:57:06,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:57:06,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:57:08,151 INFO L124 PetriNetUnfolderBase]: 4094/6954 cut-off events. [2024-06-03 20:57:08,152 INFO L125 PetriNetUnfolderBase]: For 811304/811310 co-relation queries the response was YES. [2024-06-03 20:57:08,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49320 conditions, 6954 events. 4094/6954 cut-off events. For 811304/811310 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 49393 event pairs, 748 based on Foata normal form. 5/6954 useless extension candidates. Maximal degree in co-relation 49089. Up to 6002 conditions per place. [2024-06-03 20:57:08,270 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 503 selfloop transitions, 205 changer transitions 0/715 dead transitions. [2024-06-03 20:57:08,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 715 transitions, 10854 flow [2024-06-03 20:57:08,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-03 20:57:08,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-03 20:57:08,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 333 transitions. [2024-06-03 20:57:08,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-03 20:57:08,271 INFO L175 Difference]: Start difference. First operand has 503 places, 673 transitions, 8786 flow. Second operand 15 states and 333 transitions. [2024-06-03 20:57:08,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 715 transitions, 10854 flow [2024-06-03 20:57:14,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 715 transitions, 10438 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-03 20:57:14,386 INFO L231 Difference]: Finished difference. Result has 509 places, 676 transitions, 8820 flow [2024-06-03 20:57:14,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8380, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8820, PETRI_PLACES=509, PETRI_TRANSITIONS=676} [2024-06-03 20:57:14,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 466 predicate places. [2024-06-03 20:57:14,386 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 676 transitions, 8820 flow [2024-06-03 20:57:14,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:57:14,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:57:14,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:57:14,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-03 20:57:14,387 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 20:57:14,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:57:14,387 INFO L85 PathProgramCache]: Analyzing trace with hash 442962099, now seen corresponding path program 6 times [2024-06-03 20:57:14,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:57:14,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002559883] [2024-06-03 20:57:14,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:57:14,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:57:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:57:14,628 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 20:57:14,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:57:14,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002559883] [2024-06-03 20:57:14,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002559883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:57:14,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:57:14,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:57:14,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346917007] [2024-06-03 20:57:14,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:57:14,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:57:14,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:57:14,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:57:14,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:57:14,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:57:14,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 676 transitions, 8820 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:57:14,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:57:14,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:57:14,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:57:16,477 INFO L124 PetriNetUnfolderBase]: 4091/6950 cut-off events. [2024-06-03 20:57:16,477 INFO L125 PetriNetUnfolderBase]: For 814128/814134 co-relation queries the response was YES. [2024-06-03 20:57:16,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49243 conditions, 6950 events. 4091/6950 cut-off events. For 814128/814134 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 49328 event pairs, 748 based on Foata normal form. 5/6950 useless extension candidates. Maximal degree in co-relation 49011. Up to 6017 conditions per place. [2024-06-03 20:57:16,595 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 513 selfloop transitions, 188 changer transitions 0/708 dead transitions. [2024-06-03 20:57:16,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 708 transitions, 10564 flow [2024-06-03 20:57:16,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:57:16,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:57:16,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 269 transitions. [2024-06-03 20:57:16,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5337301587301587 [2024-06-03 20:57:16,597 INFO L175 Difference]: Start difference. First operand has 509 places, 676 transitions, 8820 flow. Second operand 12 states and 269 transitions. [2024-06-03 20:57:16,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 708 transitions, 10564 flow [2024-06-03 20:57:22,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 708 transitions, 10146 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-03 20:57:22,404 INFO L231 Difference]: Finished difference. Result has 508 places, 676 transitions, 8784 flow [2024-06-03 20:57:22,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8402, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8784, PETRI_PLACES=508, PETRI_TRANSITIONS=676} [2024-06-03 20:57:22,404 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 465 predicate places. [2024-06-03 20:57:22,404 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 676 transitions, 8784 flow [2024-06-03 20:57:22,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:57:22,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:57:22,405 INFO L208 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 20:57:22,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-03 20:57:22,405 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 20:57:22,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:57:22,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1522218733, now seen corresponding path program 7 times [2024-06-03 20:57:22,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:57:22,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947012844] [2024-06-03 20:57:22,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:57:22,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:57:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:57:22,791 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 20:57:22,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:57:22,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947012844] [2024-06-03 20:57:22,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947012844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:57:22,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:57:22,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:57:22,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265372700] [2024-06-03 20:57:22,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:57:22,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:57:22,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:57:22,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:57:22,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:57:22,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:57:22,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 676 transitions, 8784 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:57:22,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:57:22,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:57:22,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:57:24,665 INFO L124 PetriNetUnfolderBase]: 4104/6952 cut-off events. [2024-06-03 20:57:24,665 INFO L125 PetriNetUnfolderBase]: For 834080/834080 co-relation queries the response was YES. [2024-06-03 20:57:24,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49529 conditions, 6952 events. 4104/6952 cut-off events. For 834080/834080 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 49269 event pairs, 784 based on Foata normal form. 1/6945 useless extension candidates. Maximal degree in co-relation 49296. Up to 5907 conditions per place. [2024-06-03 20:57:24,779 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 477 selfloop transitions, 232 changer transitions 0/716 dead transitions. [2024-06-03 20:57:24,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 716 transitions, 10924 flow [2024-06-03 20:57:24,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:57:24,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:57:24,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-03 20:57:24,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-03 20:57:24,780 INFO L175 Difference]: Start difference. First operand has 508 places, 676 transitions, 8784 flow. Second operand 10 states and 237 transitions. [2024-06-03 20:57:24,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 716 transitions, 10924 flow [2024-06-03 20:57:31,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 716 transitions, 10524 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-03 20:57:31,498 INFO L231 Difference]: Finished difference. Result has 507 places, 685 transitions, 8974 flow [2024-06-03 20:57:31,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8384, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8974, PETRI_PLACES=507, PETRI_TRANSITIONS=685} [2024-06-03 20:57:31,499 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 464 predicate places. [2024-06-03 20:57:31,499 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 685 transitions, 8974 flow [2024-06-03 20:57:31,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:57:31,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:57:31,499 INFO L208 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 20:57:31,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-03 20:57:31,500 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:57:31,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:57:31,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1811144765, now seen corresponding path program 8 times [2024-06-03 20:57:31,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:57:31,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733036564] [2024-06-03 20:57:31,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:57:31,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:57:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:57:31,809 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 20:57:31,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:57:31,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733036564] [2024-06-03 20:57:31,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733036564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:57:31,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:57:31,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:57:31,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585404402] [2024-06-03 20:57:31,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:57:31,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:57:31,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:57:31,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:57:31,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:57:31,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:57:31,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 685 transitions, 8974 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:57:31,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:57:31,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:57:31,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:57:33,767 INFO L124 PetriNetUnfolderBase]: 4125/6987 cut-off events. [2024-06-03 20:57:33,767 INFO L125 PetriNetUnfolderBase]: For 867633/867633 co-relation queries the response was YES. [2024-06-03 20:57:33,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50863 conditions, 6987 events. 4125/6987 cut-off events. For 867633/867633 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 49640 event pairs, 784 based on Foata normal form. 1/6980 useless extension candidates. Maximal degree in co-relation 50629. Up to 5587 conditions per place. [2024-06-03 20:57:33,885 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 338 selfloop transitions, 387 changer transitions 0/732 dead transitions. [2024-06-03 20:57:33,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 732 transitions, 11452 flow [2024-06-03 20:57:33,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:57:33,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:57:33,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 299 transitions. [2024-06-03 20:57:33,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:57:33,886 INFO L175 Difference]: Start difference. First operand has 507 places, 685 transitions, 8974 flow. Second operand 13 states and 299 transitions. [2024-06-03 20:57:33,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 732 transitions, 11452 flow [2024-06-03 20:57:41,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 732 transitions, 11062 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-03 20:57:41,411 INFO L231 Difference]: Finished difference. Result has 515 places, 694 transitions, 9496 flow [2024-06-03 20:57:41,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8650, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9496, PETRI_PLACES=515, PETRI_TRANSITIONS=694} [2024-06-03 20:57:41,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 472 predicate places. [2024-06-03 20:57:41,411 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 694 transitions, 9496 flow [2024-06-03 20:57:41,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:57:41,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:57:41,412 INFO L208 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 20:57:41,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-03 20:57:41,412 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:57:41,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:57:41,412 INFO L85 PathProgramCache]: Analyzing trace with hash -2127017405, now seen corresponding path program 9 times [2024-06-03 20:57:41,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:57:41,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756246000] [2024-06-03 20:57:41,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:57:41,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:57:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:57:41,650 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 20:57:41,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:57:41,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756246000] [2024-06-03 20:57:41,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756246000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:57:41,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:57:41,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:57:41,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618236881] [2024-06-03 20:57:41,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:57:41,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:57:41,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:57:41,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:57:41,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:57:41,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:57:41,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 694 transitions, 9496 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:57:41,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:57:41,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:57:41,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:57:43,724 INFO L124 PetriNetUnfolderBase]: 4122/6983 cut-off events. [2024-06-03 20:57:43,724 INFO L125 PetriNetUnfolderBase]: For 871205/871205 co-relation queries the response was YES. [2024-06-03 20:57:43,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51507 conditions, 6983 events. 4122/6983 cut-off events. For 871205/871205 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 49629 event pairs, 784 based on Foata normal form. 1/6976 useless extension candidates. Maximal degree in co-relation 51271. Up to 5584 conditions per place. [2024-06-03 20:57:43,837 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 341 selfloop transitions, 383 changer transitions 0/731 dead transitions. [2024-06-03 20:57:43,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 731 transitions, 11844 flow [2024-06-03 20:57:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:57:43,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:57:43,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 283 transitions. [2024-06-03 20:57:43,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615079365079365 [2024-06-03 20:57:43,839 INFO L175 Difference]: Start difference. First operand has 515 places, 694 transitions, 9496 flow. Second operand 12 states and 283 transitions. [2024-06-03 20:57:43,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 731 transitions, 11844 flow [2024-06-03 20:57:51,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 731 transitions, 11153 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-03 20:57:51,295 INFO L231 Difference]: Finished difference. Result has 518 places, 694 transitions, 9577 flow [2024-06-03 20:57:51,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8805, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9577, PETRI_PLACES=518, PETRI_TRANSITIONS=694} [2024-06-03 20:57:51,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 475 predicate places. [2024-06-03 20:57:51,295 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 694 transitions, 9577 flow [2024-06-03 20:57:51,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:57:51,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:57:51,296 INFO L208 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 20:57:51,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-03 20:57:51,296 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:57:51,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:57:51,296 INFO L85 PathProgramCache]: Analyzing trace with hash 275307267, now seen corresponding path program 10 times [2024-06-03 20:57:51,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:57:51,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514186463] [2024-06-03 20:57:51,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:57:51,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:57:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:57:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:57:51,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:57:51,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514186463] [2024-06-03 20:57:51,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514186463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:57:51,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:57:51,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:57:51,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225957722] [2024-06-03 20:57:51,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:57:51,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:57:51,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:57:51,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:57:51,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:57:51,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:57:51,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 694 transitions, 9577 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:57:51,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:57:51,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:57:51,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:57:53,338 INFO L124 PetriNetUnfolderBase]: 4119/6979 cut-off events. [2024-06-03 20:57:53,338 INFO L125 PetriNetUnfolderBase]: For 874428/874428 co-relation queries the response was YES. [2024-06-03 20:57:53,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51506 conditions, 6979 events. 4119/6979 cut-off events. For 874428/874428 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 49601 event pairs, 784 based on Foata normal form. 1/6972 useless extension candidates. Maximal degree in co-relation 51269. Up to 5581 conditions per place. [2024-06-03 20:57:53,457 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 367 selfloop transitions, 356 changer transitions 0/730 dead transitions. [2024-06-03 20:57:53,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 730 transitions, 12199 flow [2024-06-03 20:57:53,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:57:53,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:57:53,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-03 20:57:53,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-03 20:57:53,458 INFO L175 Difference]: Start difference. First operand has 518 places, 694 transitions, 9577 flow. Second operand 10 states and 246 transitions. [2024-06-03 20:57:53,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 730 transitions, 12199 flow [2024-06-03 20:58:00,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 730 transitions, 11451 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-03 20:58:00,940 INFO L231 Difference]: Finished difference. Result has 519 places, 694 transitions, 9547 flow [2024-06-03 20:58:00,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8829, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9547, PETRI_PLACES=519, PETRI_TRANSITIONS=694} [2024-06-03 20:58:00,940 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 476 predicate places. [2024-06-03 20:58:00,940 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 694 transitions, 9547 flow [2024-06-03 20:58:00,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:58:00,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:58:00,941 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 20:58:00,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-03 20:58:00,941 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:58:00,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:58:00,941 INFO L85 PathProgramCache]: Analyzing trace with hash 279031917, now seen corresponding path program 11 times [2024-06-03 20:58:00,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:58:00,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083973397] [2024-06-03 20:58:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:58:00,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:58:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:58:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:58:01,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:58:01,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083973397] [2024-06-03 20:58:01,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083973397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:58:01,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:58:01,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:58:01,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271348760] [2024-06-03 20:58:01,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:58:01,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:58:01,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:58:01,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:58:01,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:58:01,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:58:01,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 694 transitions, 9547 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:58:01,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:58:01,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:58:01,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:58:03,020 INFO L124 PetriNetUnfolderBase]: 4132/7009 cut-off events. [2024-06-03 20:58:03,020 INFO L125 PetriNetUnfolderBase]: For 895717/895717 co-relation queries the response was YES. [2024-06-03 20:58:03,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51767 conditions, 7009 events. 4132/7009 cut-off events. For 895717/895717 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 49849 event pairs, 751 based on Foata normal form. 1/7003 useless extension candidates. Maximal degree in co-relation 51529. Up to 6076 conditions per place. [2024-06-03 20:58:03,135 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 537 selfloop transitions, 188 changer transitions 0/732 dead transitions. [2024-06-03 20:58:03,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 732 transitions, 11411 flow [2024-06-03 20:58:03,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:58:03,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:58:03,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 269 transitions. [2024-06-03 20:58:03,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5337301587301587 [2024-06-03 20:58:03,136 INFO L175 Difference]: Start difference. First operand has 519 places, 694 transitions, 9547 flow. Second operand 12 states and 269 transitions. [2024-06-03 20:58:03,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 732 transitions, 11411 flow [2024-06-03 20:58:10,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 732 transitions, 10653 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-03 20:58:10,392 INFO L231 Difference]: Finished difference. Result has 521 places, 700 transitions, 9239 flow [2024-06-03 20:58:10,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8801, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9239, PETRI_PLACES=521, PETRI_TRANSITIONS=700} [2024-06-03 20:58:10,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 478 predicate places. [2024-06-03 20:58:10,393 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 700 transitions, 9239 flow [2024-06-03 20:58:10,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:58:10,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:58:10,393 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 20:58:10,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-03 20:58:10,393 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:58:10,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:58:10,393 INFO L85 PathProgramCache]: Analyzing trace with hash 279026337, now seen corresponding path program 12 times [2024-06-03 20:58:10,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:58:10,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327085707] [2024-06-03 20:58:10,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:58:10,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:58:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:58:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:58:10,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:58:10,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327085707] [2024-06-03 20:58:10,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327085707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:58:10,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:58:10,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:58:10,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281488703] [2024-06-03 20:58:10,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:58:10,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:58:10,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:58:10,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:58:10,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:58:10,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:58:10,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 700 transitions, 9239 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:58:10,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:58:10,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:58:10,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:58:12,525 INFO L124 PetriNetUnfolderBase]: 4129/7005 cut-off events. [2024-06-03 20:58:12,525 INFO L125 PetriNetUnfolderBase]: For 896885/896885 co-relation queries the response was YES. [2024-06-03 20:58:12,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51274 conditions, 7005 events. 4129/7005 cut-off events. For 896885/896885 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 49836 event pairs, 751 based on Foata normal form. 1/6999 useless extension candidates. Maximal degree in co-relation 51035. Up to 6073 conditions per place. [2024-06-03 20:58:12,649 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 535 selfloop transitions, 187 changer transitions 0/729 dead transitions. [2024-06-03 20:58:12,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 729 transitions, 10755 flow [2024-06-03 20:58:12,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:58:12,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:58:12,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 234 transitions. [2024-06-03 20:58:12,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-03 20:58:12,650 INFO L175 Difference]: Start difference. First operand has 521 places, 700 transitions, 9239 flow. Second operand 10 states and 234 transitions. [2024-06-03 20:58:12,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 729 transitions, 10755 flow [2024-06-03 20:58:19,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 729 transitions, 10507 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-03 20:58:19,419 INFO L231 Difference]: Finished difference. Result has 523 places, 700 transitions, 9371 flow [2024-06-03 20:58:19,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8991, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9371, PETRI_PLACES=523, PETRI_TRANSITIONS=700} [2024-06-03 20:58:19,419 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 480 predicate places. [2024-06-03 20:58:19,420 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 700 transitions, 9371 flow [2024-06-03 20:58:19,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:58:19,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:58:19,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:58:19,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-03 20:58:19,420 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:58:19,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:58:19,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1000054067, now seen corresponding path program 13 times [2024-06-03 20:58:19,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:58:19,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13260746] [2024-06-03 20:58:19,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:58:19,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:58:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:58:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:58:19,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:58:19,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13260746] [2024-06-03 20:58:19,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13260746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:58:19,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:58:19,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:58:19,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684497915] [2024-06-03 20:58:19,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:58:19,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:58:19,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:58:19,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:58:19,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:58:19,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:58:19,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 700 transitions, 9371 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:58:19,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:58:19,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:58:19,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:58:21,579 INFO L124 PetriNetUnfolderBase]: 4158/7053 cut-off events. [2024-06-03 20:58:21,579 INFO L125 PetriNetUnfolderBase]: For 938061/938061 co-relation queries the response was YES. [2024-06-03 20:58:21,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52329 conditions, 7053 events. 4158/7053 cut-off events. For 938061/938061 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 50281 event pairs, 751 based on Foata normal form. 1/7047 useless extension candidates. Maximal degree in co-relation 52088. Up to 6061 conditions per place. [2024-06-03 20:58:21,698 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 507 selfloop transitions, 230 changer transitions 0/744 dead transitions. [2024-06-03 20:58:21,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 744 transitions, 11589 flow [2024-06-03 20:58:21,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 20:58:21,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 20:58:21,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 309 transitions. [2024-06-03 20:58:21,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5255102040816326 [2024-06-03 20:58:21,699 INFO L175 Difference]: Start difference. First operand has 523 places, 700 transitions, 9371 flow. Second operand 14 states and 309 transitions. [2024-06-03 20:58:21,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 744 transitions, 11589 flow [2024-06-03 20:58:30,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 744 transitions, 11215 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-03 20:58:30,432 INFO L231 Difference]: Finished difference. Result has 528 places, 712 transitions, 9587 flow [2024-06-03 20:58:30,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8997, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9587, PETRI_PLACES=528, PETRI_TRANSITIONS=712} [2024-06-03 20:58:30,433 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 485 predicate places. [2024-06-03 20:58:30,433 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 712 transitions, 9587 flow [2024-06-03 20:58:30,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:58:30,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:58:30,434 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 20:58:30,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-03 20:58:30,434 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:58:30,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:58:30,434 INFO L85 PathProgramCache]: Analyzing trace with hash 999846677, now seen corresponding path program 14 times [2024-06-03 20:58:30,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:58:30,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995434088] [2024-06-03 20:58:30,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:58:30,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:58:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:58:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:58:30,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:58:30,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995434088] [2024-06-03 20:58:30,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995434088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:58:30,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:58:30,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:58:30,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715023971] [2024-06-03 20:58:30,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:58:30,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:58:30,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:58:30,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:58:30,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:58:30,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:58:30,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 712 transitions, 9587 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:58:30,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:58:30,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:58:30,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:58:32,618 INFO L124 PetriNetUnfolderBase]: 4171/7075 cut-off events. [2024-06-03 20:58:32,618 INFO L125 PetriNetUnfolderBase]: For 960734/960734 co-relation queries the response was YES. [2024-06-03 20:58:32,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52796 conditions, 7075 events. 4171/7075 cut-off events. For 960734/960734 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 50487 event pairs, 751 based on Foata normal form. 1/7069 useless extension candidates. Maximal degree in co-relation 52554. Up to 6076 conditions per place. [2024-06-03 20:58:32,736 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 507 selfloop transitions, 237 changer transitions 0/751 dead transitions. [2024-06-03 20:58:32,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 751 transitions, 11781 flow [2024-06-03 20:58:32,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-03 20:58:32,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-03 20:58:32,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 325 transitions. [2024-06-03 20:58:32,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-03 20:58:32,738 INFO L175 Difference]: Start difference. First operand has 528 places, 712 transitions, 9587 flow. Second operand 15 states and 325 transitions. [2024-06-03 20:58:32,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 751 transitions, 11781 flow [2024-06-03 20:58:41,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 751 transitions, 11472 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-03 20:58:41,954 INFO L231 Difference]: Finished difference. Result has 534 places, 718 transitions, 9826 flow [2024-06-03 20:58:41,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9294, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9826, PETRI_PLACES=534, PETRI_TRANSITIONS=718} [2024-06-03 20:58:41,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 491 predicate places. [2024-06-03 20:58:41,955 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 718 transitions, 9826 flow [2024-06-03 20:58:41,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:58:41,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:58:41,955 INFO L208 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 20:58:41,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-03 20:58:41,956 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:58:41,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:58:41,956 INFO L85 PathProgramCache]: Analyzing trace with hash 994691687, now seen corresponding path program 15 times [2024-06-03 20:58:41,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:58:41,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353644016] [2024-06-03 20:58:41,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:58:41,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:58:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:58:42,211 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 20:58:42,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:58:42,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353644016] [2024-06-03 20:58:42,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353644016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:58:42,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:58:42,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:58:42,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813296279] [2024-06-03 20:58:42,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:58:42,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:58:42,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:58:42,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:58:42,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:58:42,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:58:42,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 718 transitions, 9826 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:58:42,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:58:42,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:58:42,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:58:44,165 INFO L124 PetriNetUnfolderBase]: 4168/7071 cut-off events. [2024-06-03 20:58:44,166 INFO L125 PetriNetUnfolderBase]: For 963690/963690 co-relation queries the response was YES. [2024-06-03 20:58:44,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53136 conditions, 7071 events. 4168/7071 cut-off events. For 963690/963690 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 50419 event pairs, 751 based on Foata normal form. 1/7065 useless extension candidates. Maximal degree in co-relation 52892. Up to 6073 conditions per place. [2024-06-03 20:58:44,287 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 508 selfloop transitions, 232 changer transitions 0/747 dead transitions. [2024-06-03 20:58:44,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 747 transitions, 11940 flow [2024-06-03 20:58:44,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:58:44,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:58:44,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-03 20:58:44,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2024-06-03 20:58:44,288 INFO L175 Difference]: Start difference. First operand has 534 places, 718 transitions, 9826 flow. Second operand 11 states and 255 transitions. [2024-06-03 20:58:44,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 747 transitions, 11940 flow [2024-06-03 20:58:53,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 747 transitions, 11506 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-03 20:58:53,206 INFO L231 Difference]: Finished difference. Result has 534 places, 718 transitions, 9862 flow [2024-06-03 20:58:53,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9392, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9862, PETRI_PLACES=534, PETRI_TRANSITIONS=718} [2024-06-03 20:58:53,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 491 predicate places. [2024-06-03 20:58:53,207 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 718 transitions, 9862 flow [2024-06-03 20:58:53,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:58:53,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:58:53,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:58:53,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-03 20:58:53,207 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:58:53,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:58:53,208 INFO L85 PathProgramCache]: Analyzing trace with hash 994305737, now seen corresponding path program 16 times [2024-06-03 20:58:53,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:58:53,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535373957] [2024-06-03 20:58:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:58:53,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:58:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:58:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:58:53,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:58:53,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535373957] [2024-06-03 20:58:53,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535373957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:58:53,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:58:53,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:58:53,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430478362] [2024-06-03 20:58:53,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:58:53,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:58:53,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:58:53,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:58:53,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:58:53,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:58:53,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 718 transitions, 9862 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:58:53,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:58:53,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:58:53,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:58:55,219 INFO L124 PetriNetUnfolderBase]: 4165/7067 cut-off events. [2024-06-03 20:58:55,219 INFO L125 PetriNetUnfolderBase]: For 966752/966752 co-relation queries the response was YES. [2024-06-03 20:58:55,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53079 conditions, 7067 events. 4165/7067 cut-off events. For 966752/966752 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 50395 event pairs, 751 based on Foata normal form. 1/7061 useless extension candidates. Maximal degree in co-relation 52834. Up to 6070 conditions per place. [2024-06-03 20:58:55,337 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 509 selfloop transitions, 230 changer transitions 0/746 dead transitions. [2024-06-03 20:58:55,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 746 transitions, 11692 flow [2024-06-03 20:58:55,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:58:55,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:58:55,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-03 20:58:55,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:58:55,339 INFO L175 Difference]: Start difference. First operand has 534 places, 718 transitions, 9862 flow. Second operand 11 states and 253 transitions. [2024-06-03 20:58:55,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 746 transitions, 11692 flow [2024-06-03 20:59:04,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 746 transitions, 11222 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-03 20:59:04,787 INFO L231 Difference]: Finished difference. Result has 535 places, 718 transitions, 9858 flow [2024-06-03 20:59:04,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9392, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9858, PETRI_PLACES=535, PETRI_TRANSITIONS=718} [2024-06-03 20:59:04,788 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 492 predicate places. [2024-06-03 20:59:04,788 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 718 transitions, 9858 flow [2024-06-03 20:59:04,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:59:04,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:59:04,788 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 20:59:04,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-03 20:59:04,788 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:59:04,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:59:04,788 INFO L85 PathProgramCache]: Analyzing trace with hash 177155357, now seen corresponding path program 17 times [2024-06-03 20:59:04,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:59:04,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555876874] [2024-06-03 20:59:04,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:59:04,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:59:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:59:05,025 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 20:59:05,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:59:05,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555876874] [2024-06-03 20:59:05,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555876874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:59:05,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:59:05,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:59:05,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633884119] [2024-06-03 20:59:05,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:59:05,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:59:05,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:59:05,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:59:05,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:59:05,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:59:05,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 718 transitions, 9858 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:59:05,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:59:05,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:59:05,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:59:07,095 INFO L124 PetriNetUnfolderBase]: 4162/7063 cut-off events. [2024-06-03 20:59:07,095 INFO L125 PetriNetUnfolderBase]: For 969372/969372 co-relation queries the response was YES. [2024-06-03 20:59:07,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53003 conditions, 7063 events. 4162/7063 cut-off events. For 969372/969372 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 50413 event pairs, 751 based on Foata normal form. 1/7057 useless extension candidates. Maximal degree in co-relation 52757. Up to 6067 conditions per place. [2024-06-03 20:59:07,210 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 510 selfloop transitions, 232 changer transitions 0/749 dead transitions. [2024-06-03 20:59:07,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 749 transitions, 11702 flow [2024-06-03 20:59:07,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 20:59:07,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 20:59:07,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 308 transitions. [2024-06-03 20:59:07,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-03 20:59:07,211 INFO L175 Difference]: Start difference. First operand has 535 places, 718 transitions, 9858 flow. Second operand 14 states and 308 transitions. [2024-06-03 20:59:07,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 749 transitions, 11702 flow [2024-06-03 20:59:15,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 749 transitions, 11289 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 20:59:15,806 INFO L231 Difference]: Finished difference. Result has 541 places, 718 transitions, 9915 flow [2024-06-03 20:59:15,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9445, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9915, PETRI_PLACES=541, PETRI_TRANSITIONS=718} [2024-06-03 20:59:15,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 498 predicate places. [2024-06-03 20:59:15,807 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 718 transitions, 9915 flow [2024-06-03 20:59:15,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:59:15,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:59:15,807 INFO L208 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 20:59:15,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-03 20:59:15,807 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:59:15,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:59:15,807 INFO L85 PathProgramCache]: Analyzing trace with hash 177149777, now seen corresponding path program 18 times [2024-06-03 20:59:15,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:59:15,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502371083] [2024-06-03 20:59:15,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:59:15,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:59:15,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:59:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:59:16,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:59:16,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502371083] [2024-06-03 20:59:16,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502371083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:59:16,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:59:16,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:59:16,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013820450] [2024-06-03 20:59:16,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:59:16,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:59:16,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:59:16,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:59:16,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:59:16,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:59:16,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 718 transitions, 9915 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:59:16,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:59:16,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:59:16,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:59:18,055 INFO L124 PetriNetUnfolderBase]: 4159/7059 cut-off events. [2024-06-03 20:59:18,055 INFO L125 PetriNetUnfolderBase]: For 972034/972034 co-relation queries the response was YES. [2024-06-03 20:59:18,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52957 conditions, 7059 events. 4159/7059 cut-off events. For 972034/972034 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 50304 event pairs, 751 based on Foata normal form. 1/7053 useless extension candidates. Maximal degree in co-relation 52710. Up to 6064 conditions per place. [2024-06-03 20:59:18,175 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 510 selfloop transitions, 230 changer transitions 0/747 dead transitions. [2024-06-03 20:59:18,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 747 transitions, 11465 flow [2024-06-03 20:59:18,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:59:18,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:59:18,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 290 transitions. [2024-06-03 20:59:18,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311355311355311 [2024-06-03 20:59:18,177 INFO L175 Difference]: Start difference. First operand has 541 places, 718 transitions, 9915 flow. Second operand 13 states and 290 transitions. [2024-06-03 20:59:18,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 747 transitions, 11465 flow [2024-06-03 20:59:25,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 747 transitions, 10779 flow, removed 7 selfloop flow, removed 15 redundant places. [2024-06-03 20:59:25,055 INFO L231 Difference]: Finished difference. Result has 539 places, 718 transitions, 9695 flow [2024-06-03 20:59:25,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9229, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9695, PETRI_PLACES=539, PETRI_TRANSITIONS=718} [2024-06-03 20:59:25,056 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 496 predicate places. [2024-06-03 20:59:25,056 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 718 transitions, 9695 flow [2024-06-03 20:59:25,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:59:25,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:59:25,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:59:25,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-03 20:59:25,057 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:59:25,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:59:25,057 INFO L85 PathProgramCache]: Analyzing trace with hash -2055341479, now seen corresponding path program 19 times [2024-06-03 20:59:25,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:59:25,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396058185] [2024-06-03 20:59:25,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:59:25,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:59:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:59:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:59:25,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:59:25,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396058185] [2024-06-03 20:59:25,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396058185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:59:25,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:59:25,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:59:25,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737263093] [2024-06-03 20:59:25,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:59:25,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:59:25,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:59:25,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:59:25,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:59:25,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:59:25,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 718 transitions, 9695 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:59:25,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:59:25,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:59:25,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:59:27,387 INFO L124 PetriNetUnfolderBase]: 4180/7106 cut-off events. [2024-06-03 20:59:27,387 INFO L125 PetriNetUnfolderBase]: For 1006465/1006471 co-relation queries the response was YES. [2024-06-03 20:59:27,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53097 conditions, 7106 events. 4180/7106 cut-off events. For 1006465/1006471 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 50816 event pairs, 748 based on Foata normal form. 5/7106 useless extension candidates. Maximal degree in co-relation 52850. Up to 6202 conditions per place. [2024-06-03 20:59:27,507 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 611 selfloop transitions, 142 changer transitions 0/760 dead transitions. [2024-06-03 20:59:27,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 760 transitions, 11958 flow [2024-06-03 20:59:27,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-03 20:59:27,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-03 20:59:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 324 transitions. [2024-06-03 20:59:27,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-03 20:59:27,508 INFO L175 Difference]: Start difference. First operand has 539 places, 718 transitions, 9695 flow. Second operand 15 states and 324 transitions. [2024-06-03 20:59:27,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 760 transitions, 11958 flow [2024-06-03 20:59:36,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 760 transitions, 11447 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-03 20:59:36,426 INFO L231 Difference]: Finished difference. Result has 541 places, 727 transitions, 9585 flow [2024-06-03 20:59:36,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9184, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9585, PETRI_PLACES=541, PETRI_TRANSITIONS=727} [2024-06-03 20:59:36,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 498 predicate places. [2024-06-03 20:59:36,426 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 727 transitions, 9585 flow [2024-06-03 20:59:36,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:59:36,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:59:36,427 INFO L208 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 20:59:36,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-03 20:59:36,427 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:59:36,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:59:36,427 INFO L85 PathProgramCache]: Analyzing trace with hash -2143211985, now seen corresponding path program 20 times [2024-06-03 20:59:36,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:59:36,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364019489] [2024-06-03 20:59:36,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:59:36,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:59:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:59:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:59:36,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:59:36,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364019489] [2024-06-03 20:59:36,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364019489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:59:36,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:59:36,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:59:36,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435531154] [2024-06-03 20:59:36,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:59:36,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:59:36,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:59:36,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:59:36,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:59:36,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:59:36,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 727 transitions, 9585 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:59:36,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:59:36,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:59:36,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:59:38,792 INFO L124 PetriNetUnfolderBase]: 4193/7128 cut-off events. [2024-06-03 20:59:38,792 INFO L125 PetriNetUnfolderBase]: For 1029593/1029599 co-relation queries the response was YES. [2024-06-03 20:59:38,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53265 conditions, 7128 events. 4193/7128 cut-off events. For 1029593/1029599 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 51000 event pairs, 748 based on Foata normal form. 5/7128 useless extension candidates. Maximal degree in co-relation 53017. Up to 6116 conditions per place. [2024-06-03 20:59:38,922 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 548 selfloop transitions, 214 changer transitions 0/769 dead transitions. [2024-06-03 20:59:38,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 769 transitions, 12145 flow [2024-06-03 20:59:38,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 20:59:38,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 20:59:38,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 316 transitions. [2024-06-03 20:59:38,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374149659863946 [2024-06-03 20:59:38,924 INFO L175 Difference]: Start difference. First operand has 541 places, 727 transitions, 9585 flow. Second operand 14 states and 316 transitions. [2024-06-03 20:59:38,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 769 transitions, 12145 flow [2024-06-03 20:59:48,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 769 transitions, 11938 flow, removed 25 selfloop flow, removed 10 redundant places. [2024-06-03 20:59:48,266 INFO L231 Difference]: Finished difference. Result has 545 places, 733 transitions, 9892 flow [2024-06-03 20:59:48,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9378, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9892, PETRI_PLACES=545, PETRI_TRANSITIONS=733} [2024-06-03 20:59:48,266 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 502 predicate places. [2024-06-03 20:59:48,266 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 733 transitions, 9892 flow [2024-06-03 20:59:48,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:59:48,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:59:48,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:59:48,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-03 20:59:48,267 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:59:48,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:59:48,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1089778609, now seen corresponding path program 21 times [2024-06-03 20:59:48,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:59:48,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369542454] [2024-06-03 20:59:48,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:59:48,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:59:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:59:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:59:48,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:59:48,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369542454] [2024-06-03 20:59:48,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369542454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:59:48,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:59:48,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:59:48,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352930224] [2024-06-03 20:59:48,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:59:48,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:59:48,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:59:48,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:59:48,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:59:48,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 20:59:48,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 733 transitions, 9892 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:59:48,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:59:48,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 20:59:48,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:59:50,547 INFO L124 PetriNetUnfolderBase]: 4214/7163 cut-off events. [2024-06-03 20:59:50,547 INFO L125 PetriNetUnfolderBase]: For 1064937/1064943 co-relation queries the response was YES. [2024-06-03 20:59:50,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54230 conditions, 7163 events. 4214/7163 cut-off events. For 1064937/1064943 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 51275 event pairs, 747 based on Foata normal form. 5/7163 useless extension candidates. Maximal degree in co-relation 53980. Up to 6140 conditions per place. [2024-06-03 20:59:50,670 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 548 selfloop transitions, 224 changer transitions 0/779 dead transitions. [2024-06-03 20:59:50,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 779 transitions, 12217 flow [2024-06-03 20:59:50,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-03 20:59:50,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-03 20:59:50,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 347 transitions. [2024-06-03 20:59:50,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163690476190477 [2024-06-03 20:59:50,672 INFO L175 Difference]: Start difference. First operand has 545 places, 733 transitions, 9892 flow. Second operand 16 states and 347 transitions. [2024-06-03 20:59:50,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 779 transitions, 12217 flow [2024-06-03 21:00:00,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 779 transitions, 11928 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-03 21:00:00,610 INFO L231 Difference]: Finished difference. Result has 553 places, 742 transitions, 10200 flow [2024-06-03 21:00:00,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9613, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10200, PETRI_PLACES=553, PETRI_TRANSITIONS=742} [2024-06-03 21:00:00,610 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 510 predicate places. [2024-06-03 21:00:00,610 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 742 transitions, 10200 flow [2024-06-03 21:00:00,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 21:00:00,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:00:00,611 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 21:00:00,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-03 21:00:00,611 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:00:00,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:00:00,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1599965915, now seen corresponding path program 22 times [2024-06-03 21:00:00,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:00:00,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760112446] [2024-06-03 21:00:00,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:00:00,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:00:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:00:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:00:00,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:00:00,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760112446] [2024-06-03 21:00:00,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760112446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:00:00,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:00:00,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 21:00:00,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321818545] [2024-06-03 21:00:00,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:00:00,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 21:00:00,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:00:00,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 21:00:00,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 21:00:00,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 21:00:00,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 742 transitions, 10200 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 21:00:00,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:00:00,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 21:00:00,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:00:02,868 INFO L124 PetriNetUnfolderBase]: 4211/7159 cut-off events. [2024-06-03 21:00:02,868 INFO L125 PetriNetUnfolderBase]: For 1067666/1067672 co-relation queries the response was YES. [2024-06-03 21:00:02,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54618 conditions, 7159 events. 4211/7159 cut-off events. For 1067666/1067672 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 51276 event pairs, 747 based on Foata normal form. 5/7159 useless extension candidates. Maximal degree in co-relation 54365. Up to 6137 conditions per place. [2024-06-03 21:00:02,996 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 550 selfloop transitions, 224 changer transitions 0/781 dead transitions. [2024-06-03 21:00:02,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 781 transitions, 12432 flow [2024-06-03 21:00:02,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-03 21:00:02,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-03 21:00:02,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 383 transitions. [2024-06-03 21:00:02,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066137566137566 [2024-06-03 21:00:02,998 INFO L175 Difference]: Start difference. First operand has 553 places, 742 transitions, 10200 flow. Second operand 18 states and 383 transitions. [2024-06-03 21:00:02,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 781 transitions, 12432 flow [2024-06-03 21:00:12,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 781 transitions, 12015 flow, removed 26 selfloop flow, removed 14 redundant places. [2024-06-03 21:00:12,163 INFO L231 Difference]: Finished difference. Result has 557 places, 742 transitions, 10237 flow [2024-06-03 21:00:12,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9783, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10237, PETRI_PLACES=557, PETRI_TRANSITIONS=742} [2024-06-03 21:00:12,164 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 514 predicate places. [2024-06-03 21:00:12,164 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 742 transitions, 10237 flow [2024-06-03 21:00:12,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 21:00:12,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:00:12,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:00:12,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-03 21:00:12,165 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:00:12,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:00:12,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1763001519, now seen corresponding path program 23 times [2024-06-03 21:00:12,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:00:12,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911633155] [2024-06-03 21:00:12,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:00:12,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:00:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:00:12,437 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 21:00:12,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:00:12,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911633155] [2024-06-03 21:00:12,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911633155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:00:12,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:00:12,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 21:00:12,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040506417] [2024-06-03 21:00:12,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:00:12,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 21:00:12,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:00:12,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 21:00:12,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 21:00:12,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 21:00:12,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 742 transitions, 10237 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 21:00:12,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:00:12,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 21:00:12,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:00:14,825 INFO L124 PetriNetUnfolderBase]: 4208/7155 cut-off events. [2024-06-03 21:00:14,826 INFO L125 PetriNetUnfolderBase]: For 1070601/1070607 co-relation queries the response was YES. [2024-06-03 21:00:14,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54512 conditions, 7155 events. 4208/7155 cut-off events. For 1070601/1070607 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 51253 event pairs, 748 based on Foata normal form. 5/7155 useless extension candidates. Maximal degree in co-relation 54260. Up to 6136 conditions per place. [2024-06-03 21:00:14,947 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 555 selfloop transitions, 218 changer transitions 0/780 dead transitions. [2024-06-03 21:00:14,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 780 transitions, 12767 flow [2024-06-03 21:00:14,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-03 21:00:14,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-03 21:00:14,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 352 transitions. [2024-06-03 21:00:14,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-03 21:00:14,949 INFO L175 Difference]: Start difference. First operand has 557 places, 742 transitions, 10237 flow. Second operand 16 states and 352 transitions. [2024-06-03 21:00:14,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 780 transitions, 12767 flow [2024-06-03 21:00:24,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 780 transitions, 12317 flow, removed 1 selfloop flow, removed 16 redundant places. [2024-06-03 21:00:24,064 INFO L231 Difference]: Finished difference. Result has 557 places, 742 transitions, 10229 flow [2024-06-03 21:00:24,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9787, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10229, PETRI_PLACES=557, PETRI_TRANSITIONS=742} [2024-06-03 21:00:24,064 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 514 predicate places. [2024-06-03 21:00:24,064 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 742 transitions, 10229 flow [2024-06-03 21:00:24,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 21:00:24,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:00:24,064 INFO L208 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 21:00:24,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-03 21:00:24,065 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:00:24,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:00:24,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1263779285, now seen corresponding path program 24 times [2024-06-03 21:00:24,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:00:24,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939626126] [2024-06-03 21:00:24,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:00:24,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:00:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:00:24,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:00:24,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:00:24,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939626126] [2024-06-03 21:00:24,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939626126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:00:24,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:00:24,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 21:00:24,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106680825] [2024-06-03 21:00:24,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:00:24,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 21:00:24,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:00:24,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 21:00:24,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 21:00:24,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 21:00:24,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 742 transitions, 10229 flow. Second operand has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 21:00:24,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:00:24,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 21:00:24,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:00:26,429 INFO L124 PetriNetUnfolderBase]: 4205/7151 cut-off events. [2024-06-03 21:00:26,429 INFO L125 PetriNetUnfolderBase]: For 1073044/1073050 co-relation queries the response was YES. [2024-06-03 21:00:26,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54415 conditions, 7151 events. 4205/7151 cut-off events. For 1073044/1073050 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 51223 event pairs, 748 based on Foata normal form. 5/7151 useless extension candidates. Maximal degree in co-relation 54162. Up to 6145 conditions per place. [2024-06-03 21:00:26,552 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 564 selfloop transitions, 208 changer transitions 0/779 dead transitions. [2024-06-03 21:00:26,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 779 transitions, 12761 flow [2024-06-03 21:00:26,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-03 21:00:26,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-03 21:00:26,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 333 transitions. [2024-06-03 21:00:26,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-03 21:00:26,554 INFO L175 Difference]: Start difference. First operand has 557 places, 742 transitions, 10229 flow. Second operand 15 states and 333 transitions. [2024-06-03 21:00:26,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 779 transitions, 12761 flow [2024-06-03 21:00:34,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 779 transitions, 12305 flow, removed 10 selfloop flow, removed 14 redundant places. [2024-06-03 21:00:34,790 INFO L231 Difference]: Finished difference. Result has 558 places, 742 transitions, 10195 flow [2024-06-03 21:00:34,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9773, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10195, PETRI_PLACES=558, PETRI_TRANSITIONS=742} [2024-06-03 21:00:34,790 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 515 predicate places. [2024-06-03 21:00:34,790 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 742 transitions, 10195 flow [2024-06-03 21:00:34,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.636363636363637) internal successors, (172), 11 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 21:00:34,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:00:34,791 INFO L208 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 21:00:34,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-03 21:00:34,791 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:00:34,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:00:34,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1822528503, now seen corresponding path program 25 times [2024-06-03 21:00:34,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:00:34,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273263354] [2024-06-03 21:00:34,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:00:34,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:00:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:00:35,037 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 21:00:35,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:00:35,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273263354] [2024-06-03 21:00:35,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273263354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:00:35,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:00:35,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 21:00:35,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329002920] [2024-06-03 21:00:35,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:00:35,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 21:00:35,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:00:35,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 21:00:35,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 21:00:35,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 21:00:35,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 742 transitions, 10195 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 21:00:35,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:00:35,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 21:00:35,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:00:36,942 INFO L124 PetriNetUnfolderBase]: 4258/7226 cut-off events. [2024-06-03 21:00:36,942 INFO L125 PetriNetUnfolderBase]: For 1154614/1154614 co-relation queries the response was YES. [2024-06-03 21:00:37,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55834 conditions, 7226 events. 4258/7226 cut-off events. For 1154614/1154614 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 51840 event pairs, 751 based on Foata normal form. 1/7220 useless extension candidates. Maximal degree in co-relation 55580. Up to 5843 conditions per place. [2024-06-03 21:00:37,264 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 388 selfloop transitions, 407 changer transitions 0/802 dead transitions. [2024-06-03 21:00:37,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 802 transitions, 13361 flow [2024-06-03 21:00:37,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 21:00:37,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 21:00:37,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 303 transitions. [2024-06-03 21:00:37,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554945054945055 [2024-06-03 21:00:37,265 INFO L175 Difference]: Start difference. First operand has 558 places, 742 transitions, 10195 flow. Second operand 13 states and 303 transitions. [2024-06-03 21:00:37,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 802 transitions, 13361 flow [2024-06-03 21:00:46,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 802 transitions, 12886 flow, removed 3 selfloop flow, removed 16 redundant places. [2024-06-03 21:00:46,171 INFO L231 Difference]: Finished difference. Result has 556 places, 763 transitions, 10921 flow [2024-06-03 21:00:46,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9720, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10921, PETRI_PLACES=556, PETRI_TRANSITIONS=763} [2024-06-03 21:00:46,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 513 predicate places. [2024-06-03 21:00:46,172 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 763 transitions, 10921 flow [2024-06-03 21:00:46,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 21:00:46,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 21:00:46,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 21:00:46,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2024-06-03 21:00:46,173 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 21:00:46,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 21:00:46,173 INFO L85 PathProgramCache]: Analyzing trace with hash 247294381, now seen corresponding path program 26 times [2024-06-03 21:00:46,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 21:00:46,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787782110] [2024-06-03 21:00:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 21:00:46,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 21:00:46,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 21:00:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 21:00:46,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 21:00:46,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787782110] [2024-06-03 21:00:46,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787782110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 21:00:46,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 21:00:46,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 21:00:46,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592389243] [2024-06-03 21:00:46,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 21:00:46,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 21:00:46,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 21:00:46,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 21:00:46,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 21:00:46,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 21:00:46,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 763 transitions, 10921 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 21:00:46,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 21:00:46,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 21:00:46,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 21:00:48,441 INFO L124 PetriNetUnfolderBase]: 4271/7248 cut-off events. [2024-06-03 21:00:48,441 INFO L125 PetriNetUnfolderBase]: For 1182146/1182146 co-relation queries the response was YES. [2024-06-03 21:00:48,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56866 conditions, 7248 events. 4271/7248 cut-off events. For 1182146/1182146 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 51982 event pairs, 751 based on Foata normal form. 1/7242 useless extension candidates. Maximal degree in co-relation 56610. Up to 5858 conditions per place. [2024-06-03 21:00:48,567 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 399 selfloop transitions, 408 changer transitions 0/814 dead transitions. [2024-06-03 21:00:48,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 814 transitions, 13947 flow [2024-06-03 21:00:48,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 21:00:48,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 21:00:48,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 308 transitions. [2024-06-03 21:00:48,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-03 21:00:48,569 INFO L175 Difference]: Start difference. First operand has 556 places, 763 transitions, 10921 flow. Second operand 13 states and 308 transitions. [2024-06-03 21:00:48,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 814 transitions, 13947 flow Killed by 15